chore: release v3.150.0

This reverts commit 6860a0beba.

.claude/agents/changelog-writer.md

@@ -0,0 +1,89 @@
+---
+name: changelog-writer
+description: Use this agent when a feature branch is complete and ready to merge to main, and you need to create a changelog entry documenting the new feature or changes. This agent should be invoked proactively after significant feature work is completed and before merging.\n\nExamples:\n\n<example>\nContext: User has just completed implementing a new tracing visualization feature and the code has been reviewed.\nuser: "I've finished the trace timeline view feature. Can you help me prepare this for merge?"\nassistant: "Let me use the changelog-writer agent to create a changelog entry for this feature."\n<commentary>\nThe feature is complete and ready for merge, so we should use the changelog-writer agent to document it in the changelog.\n</commentary>\n</example>\n\n<example>\nContext: User mentions they're done with a feature implementation.\nuser: "The prompt versioning feature is done and tested. What's next?"\nassistant: "Great! Let me use the changelog-writer agent to create a changelog entry documenting this new feature before we merge."\n<commentary>\nSince the feature is complete, proactively use the changelog-writer agent to create documentation.\n</commentary>\n</example>\n\n<example>\nContext: User explicitly requests changelog creation.\nuser: "Can you create a changelog post for the new dataset export functionality?"\nassistant: "I'll use the changelog-writer agent to analyze the changes and create an appropriate changelog entry."\n<commentary>\nDirect request to create changelog, use the changelog-writer agent.\n</commentary>\n</example>
+model: inherit
+color: pink
+---
+
+You are an expert technical writer specializing in creating clear, user-focused changelog entries for developer tools and SaaS platforms. Your role is to document completed features in a way that helps users understand what's new, why it matters, and how to use it.
+
+## Your Process
+
+### Step 1: Understand the Changes
+1. Extract the Linear issue number from the current branch name (format: lfe-XXXX)
+2. Use the Linear MCP to fetch the issue details for additional context about the feature's purpose and requirements
+3. Compare the current branch to main using git diff to understand the scope of changes at a high level
+4. Identify the core feature or improvement that was implemented
+5. Determine which parts of the codebase were affected (frontend, backend, API, database, etc.)
+
+### Step 2: Study Recent Changelog Patterns
+1. Read 3-5 of the most recent changelog posts in `../langfuse-docs/pages/changelog`
+2. Analyze their structure, tone, and formatting conventions
+3. Note how they:
+   - Title features (concise, benefit-focused)
+   - Explain the "why" (user problems solved)
+   - Describe the "what" (feature capabilities)
+   - Link to relevant documentation
+   - Use images/screenshots
+   - Format code examples or technical details
+
+### Step 3: Identify Documentation Links
+1. Check if there is relevant documentation in `../langfuse-docs/pages` that relates to this feature
+2. If the feature is new, note that documentation may need to be created
+3. If the feature extends existing functionality, identify which docs pages should be referenced
+
+### Step 4: Draft the Changelog Entry
+Create a changelog post that includes:
+
+**Required Elements:**
+- **Title**: Clear, benefit-focused headline (not just the feature name)
+- **Date**: Use the current date in the format used by existing changelogs
+- **Summary**: 1-2 sentences explaining what changed and why it matters to users
+- **Description**: Detailed explanation of the feature, its capabilities, and use cases
+- **Documentation Links**: References to relevant docs pages (if applicable)
+
+**Style Guidelines:**
+- Write in second person ("you can now...")
+- Focus on user benefits, not implementation details
+- Be concise but complete
+- Use active voice
+- Include technical details only when they help users understand the feature
+- Match the tone and style of recent changelog entries
+
+**Formatting:**
+- Follow the exact file structure and frontmatter format of existing changelog posts
+- Use appropriate markdown formatting (headings, lists, code blocks, links)
+- Ensure proper spacing and readability
+
+### Step 5: Assess Visual Needs
+After drafting the changelog, explicitly tell the user:
+- Whether a screenshot or image would enhance understanding of this feature
+- What specific aspect should be captured in the screenshot (if applicable)
+- Where in the changelog the image should be placed
+
+## Quality Standards
+
+**Before presenting your changelog:**
+- Verify it follows the structure and style of recent entries
+- Ensure all links are correctly formatted
+- Check that technical terms match those used in the codebase and docs
+- Confirm the feature description is accurate based on the code changes
+- Validate that the user benefit is clear and compelling
+
+## Output Format
+
+Present your work in this order:
+1. Brief summary of what you learned from the branch comparison and Linear issue
+2. The complete changelog post content (ready to be saved as a new file)
+3. Recommendation on whether to add an image/screenshot and what it should show
+4. List of any documentation pages that should be referenced or created
+
+## Important Notes
+
+- The changelog lives in `../langfuse-docs/pages/changelog`
+- Always check the Linear issue via the branch name (lfe-XXXX format) for context
+- Compare against main branch to understand the full scope of changes
+- Study recent changelogs before writing to maintain consistency
+- Focus on user value, not technical implementation details
+- Be thorough in your analysis before drafting
+- If you're unsure about any aspect of the feature, ask clarifying questions before proceeding

.claude/hooks/CONFIG.md

@@ -0,0 +1,436 @@
+# Hooks Configuration Guide
+
+This guide explains how to configure and customize the hooks system for your project.
+
+## Quick Start Configuration
+
+### 1. Register Hooks in .claude/settings.json
+
+Create or update `.claude/settings.json` in your project root:
+
+```json
+{
+  "hooks": {
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/skill-activation-prompt.sh"
+          }
+        ]
+      }
+    ],
+    "Stop": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/error-handling-reminder.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+### 2. Install Dependencies
+
+```bash
+cd .claude/hooks
+npm install
+```
+
+### 3. Set Execute Permissions
+
+```bash
+chmod +x .claude/hooks/*.sh
+```
+
+## Customization Options
+
+### Project Structure Detection
+
+By default, hooks detect these directory patterns:
+
+**Frontend:** `frontend/`, `client/`, `web/`, `app/`, `ui/`
+**Backend:** `backend/`, `server/`, `api/`, `src/`, `services/`
+**Database:** `database/`, `prisma/`, `migrations/`
+**Monorepo:** `packages/*`, `examples/*`
+
+#### Adding Custom Directory Patterns
+
+Edit `.claude/hooks/post-tool-use-tracker.sh`, function `detect_repo()`:
+
+```bash
+case "$repo" in
+    # Add your custom directories here
+    my-custom-service)
+        echo "$repo"
+        ;;
+    admin-panel)
+        echo "$repo"
+        ;;
+    # ... existing patterns
+esac
+```
+
+### Build Command Detection
+
+The hooks auto-detect build commands based on:
+
+1. Presence of `package.json` with "build" script
+2. Package manager (pnpm > npm > yarn)
+3. Special cases (Prisma schemas)
+
+#### Customizing Build Commands
+
+Edit `.claude/hooks/post-tool-use-tracker.sh`, function `get_build_command()`:
+
+```bash
+# Add custom build logic
+if [[ "$repo" == "my-service" ]]; then
+    echo "cd $repo_path && make build"
+    return
+fi
+```
+
+### TypeScript Configuration
+
+Hooks automatically detect:
+
+- `tsconfig.json` for standard TypeScript projects
+- `tsconfig.app.json` for Vite/React projects
+
+#### Custom TypeScript Configs
+
+Edit `.claude/hooks/post-tool-use-tracker.sh`, function `get_tsc_command()`:
+
+```bash
+if [[ "$repo" == "my-service" ]]; then
+    echo "cd $repo_path && npx tsc --project tsconfig.build.json --noEmit"
+    return
+fi
+```
+
+### Prettier Configuration
+
+The prettier hook searches for configs in this order:
+
+1. Current file directory (walking upward)
+2. Project root
+3. Falls back to Prettier defaults
+
+#### Custom Prettier Config Search
+
+Edit `.claude/hooks/stop-prettier-formatter.sh`, function `get_prettier_config()`:
+
+```bash
+# Add custom config locations
+if [[ -f "$project_root/config/.prettierrc" ]]; then
+    echo "$project_root/config/.prettierrc"
+    return
+fi
+```
+
+### Error Handling Reminders
+
+Configure file category detection in `.claude/hooks/error-handling-reminder.ts`:
+
+```typescript
+function getFileCategory(
+  filePath: string,
+): "backend" | "frontend" | "database" | "other" {
+  // Add custom patterns
+  if (filePath.includes("/my-custom-dir/")) return "backend";
+  // ... existing patterns
+}
+```
+
+### Error Threshold Configuration
+
+Change when to recommend the auto-error-resolver agent.
+
+Edit `.claude/hooks/stop-build-check-enhanced.sh`:
+
+```bash
+# Default is 5 errors - change to your preference
+if [[ $total_errors -ge 10 ]]; then  # Now requires 10+ errors
+    # Recommend agent
+fi
+```
+
+## Environment Variables
+
+### Global Environment Variables
+
+Set in your shell profile (`.bashrc`, `.zshrc`, etc.):
+
+```bash
+# Disable error handling reminders
+export SKIP_ERROR_REMINDER=1
+
+# Custom project directory (if not using default)
+export CLAUDE_PROJECT_DIR=/path/to/your/project
+```
+
+### Per-Session Environment Variables
+
+Set before starting Claude Code:
+
+```bash
+SKIP_ERROR_REMINDER=1 claude-code
+```
+
+## Hook Execution Order
+
+Stop hooks run in the order specified in `settings.json`:
+
+```json
+"Stop": [
+  {
+    "hooks": [
+      { "command": "...formatter.sh" },    // Runs FIRST
+      { "command": "...build-check.sh" },  // Runs SECOND
+      { "command": "...reminder.sh" }      // Runs THIRD
+    ]
+  }
+]
+```
+
+**Why this order matters:**
+
+1. Format files first (clean code)
+2. Then check for errors
+3. Finally show reminders
+
+## Selective Hook Enabling
+
+You don't need all hooks. Choose what works for your project:
+
+### Minimal Setup (Skill Activation Only)
+
+```json
+{
+  "hooks": {
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/skill-activation-prompt.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+### Build Checking Only (No Formatting)
+
+```json
+{
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|MultiEdit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/post-tool-use-tracker.sh"
+          }
+        ]
+      }
+    ],
+    "Stop": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/stop-build-check-enhanced.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+### Formatting Only (No Build Checking)
+
+```json
+{
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|MultiEdit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/post-tool-use-tracker.sh"
+          }
+        ]
+      }
+    ],
+    "Stop": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/stop-prettier-formatter.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+## Cache Management
+
+### Cache Location
+
+```
+$CLAUDE_PROJECT_DIR/.claude/tsc-cache/[session_id]/
+```
+
+### Manual Cache Cleanup
+
+```bash
+# Remove all cached data
+rm -rf $CLAUDE_PROJECT_DIR/.claude/tsc-cache/*
+
+# Remove specific session
+rm -rf $CLAUDE_PROJECT_DIR/.claude/tsc-cache/[session-id]
+```
+
+### Automatic Cleanup
+
+The build-check hook automatically cleans up session cache on successful builds.
+
+## Troubleshooting Configuration
+
+### Hook Not Executing
+
+1. **Check registration:** Verify hook is in `.claude/settings.json`
+2. **Check permissions:** Run `chmod +x .claude/hooks/*.sh`
+3. **Check path:** Ensure `$CLAUDE_PROJECT_DIR` is set correctly
+4. **Check TypeScript:** Run `cd .claude/hooks && npx tsc` to check for errors
+
+### False Positive Detections
+
+**Issue:** Hook triggers for files it shouldn't
+
+**Solution:** Add skip conditions in the relevant hook:
+
+```bash
+# In post-tool-use-tracker.sh
+if [[ "$file_path" =~ /generated/ ]]; then
+    exit 0  # Skip generated files
+fi
+```
+
+### Performance Issues
+
+**Issue:** Hooks are slow
+
+**Solutions:**
+
+1. Limit TypeScript checks to changed files only
+2. Use faster package managers (pnpm > npm)
+3. Add more skip conditions
+4. Disable Prettier for large files
+
+```bash
+# Skip large files in stop-prettier-formatter.sh
+file_size=$(wc -c < "$file" 2>/dev/null || echo 0)
+if [[ $file_size -gt 100000 ]]; then  # Skip files > 100KB
+    continue
+fi
+```
+
+### Debugging Hooks
+
+Add debug output to any hook:
+
+```bash
+# At the top of the hook script
+set -x  # Enable debug mode
+
+# Or add specific debug lines
+echo "DEBUG: file_path=$file_path" >&2
+echo "DEBUG: repo=$repo" >&2
+```
+
+View hook execution in Claude Code's logs.
+
+## Advanced Configuration
+
+### Custom Hook Event Handlers
+
+You can create your own hooks for other events:
+
+```json
+{
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "Bash",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/my-custom-bash-guard.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+### Monorepo Configuration
+
+For monorepos with multiple packages:
+
+```bash
+# In post-tool-use-tracker.sh, detect_repo()
+case "$repo" in
+    packages)
+        # Get the package name
+        local package=$(echo "$relative_path" | cut -d'/' -f2)
+        if [[ -n "$package" ]]; then
+            echo "packages/$package"
+        else
+            echo "$repo"
+        fi
+        ;;
+esac
+```
+
+### Docker/Container Projects
+
+If your build commands need to run in containers:
+
+```bash
+# In post-tool-use-tracker.sh, get_build_command()
+if [[ "$repo" == "api" ]]; then
+    echo "docker-compose exec api npm run build"
+    return
+fi
+```
+
+## Best Practices
+
+1. **Start minimal** - Enable hooks one at a time
+2. **Test thoroughly** - Make changes and verify hooks work
+3. **Document customizations** - Add comments to explain custom logic
+4. **Version control** - Commit `.claude/` directory to git
+5. **Team consistency** - Share configuration across team
+
+## See Also
+
+- [README.md](./README.md) - Hooks overview
+- [../../docs/HOOKS_SYSTEM.md](../../docs/HOOKS_SYSTEM.md) - Complete hooks reference
+- [../../docs/SKILLS_SYSTEM.md](../../docs/SKILLS_SYSTEM.md) - Skills integration

.claude/hooks/README.md

@@ -0,0 +1,116 @@
+# Hooks
+
+Claude Code hooks that enable skill auto-activation, file tracking, and validation.
+
+---
+
+## What Are Hooks?
+
+Hooks are scripts that run at specific points in Claude's workflow:
+
+- **UserPromptSubmit**: When user submits a prompt
+- **PreToolUse**: Before a tool executes
+- **PostToolUse**: After a tool completes
+- **Stop**: When user requests to stop
+
+**Key insight:** Hooks can modify prompts, block actions, and track state - enabling features Claude can't do alone.
+
+---
+
+## Essential Hooks (Start Here)
+
+### skill-activation-prompt (UserPromptSubmit)
+
+**Purpose:** Automatically suggests relevant skills based on user prompts and file context
+
+**How it works:**
+
+1. Reads `skill-rules.json`
+2. Matches user prompt against trigger patterns
+3. Checks which files user is working with
+4. Injects skill suggestions into Claude's context
+
+**Why it's essential:** This is THE hook that makes skills auto-activate.
+
+**Integration:**
+
+```bash
+# Copy both files
+cp skill-activation-prompt.sh your-project/.claude/hooks/
+cp skill-activation-prompt.ts your-project/.claude/hooks/
+
+# Make executable
+chmod +x your-project/.claude/hooks/skill-activation-prompt.sh
+
+# Install dependencies
+cd your-project/.claude/hooks
+npm install
+```
+
+**Add to settings.json:**
+
+```json
+{
+  "hooks": {
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/skill-activation-prompt.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+**Customization:** ✅ None needed - reads skill-rules.json automatically
+
+---
+
+### post-tool-use-tracker (PostToolUse)
+
+**Purpose:** Tracks file changes to maintain context across sessions
+
+**How it works:**
+
+1. Monitors Edit/Write/MultiEdit tool calls
+2. Records which files were modified
+3. Creates cache for context management
+4. Auto-detects project structure (frontend, backend, packages, etc.)
+
+**Why it's essential:** Helps Claude understand what parts of your codebase are active.
+
+**Integration:**
+
+```bash
+# Copy file
+cp post-tool-use-tracker.sh your-project/.claude/hooks/
+
+# Make executable
+chmod +x your-project/.claude/hooks/post-tool-use-tracker.sh
+```
+
+**Add to settings.json:**
+
+```json
+{
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|MultiEdit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/post-tool-use-tracker.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+**Customization:** ✅ None needed - auto-detects structure

.claude/hooks/error-handling-reminder.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Skip if environment variable is set
+if [ -n "$SKIP_ERROR_REMINDER" ]; then
+    exit 0
+fi
+
+# Get the directory of this script
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$SCRIPT_DIR"
+
+cat | npx tsx error-handling-reminder.ts

.claude/hooks/error-handling-reminder.ts

@@ -0,0 +1,256 @@
+#!/usr/bin/env node
+import { readFileSync, existsSync } from "fs";
+import { join } from "path";
+
+interface HookInput {
+  session_id: string;
+  transcript_path: string;
+  cwd: string;
+  permission_mode: string;
+  hook_event_name: string;
+}
+
+interface EditedFile {
+  path: string;
+  tool: string;
+  timestamp: string;
+}
+
+interface SessionTracking {
+  edited_files: EditedFile[];
+}
+
+function getFileCategory(
+  filePath: string,
+): "backend" | "frontend" | "database" | "other" {
+  // Frontend detection
+  if (
+    filePath.includes("/frontend/") ||
+    filePath.includes("/client/") ||
+    filePath.includes("/src/components/") ||
+    filePath.includes("/src/features/")
+  )
+    return "frontend";
+
+  // Backend detection (common service directories)
+  if (
+    filePath.includes("/src/controllers/") ||
+    filePath.includes("/src/services/") ||
+    filePath.includes("/src/routes/") ||
+    filePath.includes("/src/api/") ||
+    filePath.includes("/server/")
+  )
+    return "backend";
+
+  // Database detection
+  if (
+    filePath.includes("/database/") ||
+    filePath.includes("/prisma/") ||
+    filePath.includes("/migrations/")
+  )
+    return "database";
+
+  return "other";
+}
+
+function shouldCheckErrorHandling(filePath: string): boolean {
+  // Skip test files, config files, and type definitions
+  if (filePath.match(/\.(test|spec)\.(ts|tsx)$/)) return false;
+  if (filePath.match(/\.(config|d)\.(ts|tsx)$/)) return false;
+  if (filePath.includes("types/")) return false;
+  if (filePath.includes(".styles.ts")) return false;
+
+  // Check for code files
+  return filePath.match(/\.(ts|tsx|js|jsx)$/) !== null;
+}
+
+function analyzeFileContent(filePath: string): {
+  hasTryCatch: boolean;
+  hasAsync: boolean;
+  hasPrisma: boolean;
+  hasController: boolean;
+  hasApiCall: boolean;
+} {
+  if (!existsSync(filePath)) {
+    return {
+      hasTryCatch: false,
+      hasAsync: false,
+      hasPrisma: false,
+      hasController: false,
+      hasApiCall: false,
+    };
+  }
+
+  const content = readFileSync(filePath, "utf-8");
+
+  return {
+    hasTryCatch: /try\s*\{/.test(content),
+    hasAsync: /async\s+/.test(content),
+    hasPrisma:
+      /prisma\.|PrismaService|findMany|findUnique|create\(|update\(|delete\(/i.test(
+        content,
+      ),
+    hasController:
+      /export class.*Controller|router\.|app\.(get|post|put|delete|patch)/.test(
+        content,
+      ),
+    hasApiCall: /fetch\(|axios\.|apiClient\./i.test(content),
+  };
+}
+
+async function main() {
+  try {
+    // Read input from stdin
+    const input = readFileSync(0, "utf-8");
+    const data: HookInput = JSON.parse(input);
+
+    const { session_id } = data;
+    const projectDir = process.env.CLAUDE_PROJECT_DIR || process.cwd();
+
+    // Check for edited files tracking
+    const cacheDir = join(
+      process.env.HOME || "/root",
+      ".claude",
+      "tsc-cache",
+      session_id,
+    );
+    const trackingFile = join(cacheDir, "edited-files.log");
+
+    if (!existsSync(trackingFile)) {
+      // No files edited this session, no reminder needed
+      process.exit(0);
+    }
+
+    // Read tracking data
+    const trackingContent = readFileSync(trackingFile, "utf-8");
+    const editedFiles = trackingContent
+      .trim()
+      .split("\n")
+      .filter((line) => line.length > 0)
+      .map((line) => {
+        const [timestamp, tool, path] = line.split("\t");
+        return { timestamp, tool, path };
+      });
+
+    if (editedFiles.length === 0) {
+      process.exit(0);
+    }
+
+    // Categorize files
+    const categories = {
+      backend: [] as string[],
+      frontend: [] as string[],
+      database: [] as string[],
+      other: [] as string[],
+    };
+
+    const analysisResults: Array<{
+      path: string;
+      category: string;
+      analysis: ReturnType<typeof analyzeFileContent>;
+    }> = [];
+
+    for (const file of editedFiles) {
+      if (!shouldCheckErrorHandling(file.path)) continue;
+
+      const category = getFileCategory(file.path);
+      categories[category].push(file.path);
+
+      const analysis = analyzeFileContent(file.path);
+      analysisResults.push({ path: file.path, category, analysis });
+    }
+
+    // Check if any code that needs error handling was written
+    const needsAttention = analysisResults.some(
+      ({ analysis }) =>
+        analysis.hasTryCatch ||
+        analysis.hasAsync ||
+        analysis.hasPrisma ||
+        analysis.hasController ||
+        analysis.hasApiCall,
+    );
+
+    if (!needsAttention) {
+      // No risky code patterns detected, skip reminder
+      process.exit(0);
+    }
+
+    // Display reminder
+    console.log("\n━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
+    console.log("📋 ERROR HANDLING SELF-CHECK");
+    console.log("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n");
+
+    // Backend reminders
+    if (categories.backend.length > 0) {
+      const backendFiles = analysisResults.filter(
+        (f) => f.category === "backend",
+      );
+      const hasTryCatch = backendFiles.some((f) => f.analysis.hasTryCatch);
+      const hasPrisma = backendFiles.some((f) => f.analysis.hasPrisma);
+      const hasController = backendFiles.some((f) => f.analysis.hasController);
+
+      console.log("⚠️  Backend Changes Detected");
+      console.log(`   ${categories.backend.length} file(s) edited\n`);
+
+      if (hasTryCatch) {
+        console.log(
+          "   ❓ Did you add Sentry.captureException() in catch blocks?",
+        );
+      }
+      if (hasPrisma) {
+        console.log("   ❓ Are Prisma operations wrapped in error handling?");
+      }
+      if (hasController) {
+        console.log("   ❓ Do controllers use BaseController.handleError()?");
+      }
+
+      console.log("\n   💡 Backend Best Practice:");
+      console.log("      - All errors should be captured to Sentry");
+      console.log("      - Use appropriate error helpers for context");
+      console.log("      - Controllers should extend BaseController\n");
+    }
+
+    // Frontend reminders
+    if (categories.frontend.length > 0) {
+      const frontendFiles = analysisResults.filter(
+        (f) => f.category === "frontend",
+      );
+      const hasApiCall = frontendFiles.some((f) => f.analysis.hasApiCall);
+      const hasTryCatch = frontendFiles.some((f) => f.analysis.hasTryCatch);
+
+      console.log("💡 Frontend Changes Detected");
+      console.log(`   ${categories.frontend.length} file(s) edited\n`);
+
+      if (hasApiCall) {
+        console.log("   ❓ Do API calls show user-friendly error messages?");
+      }
+      if (hasTryCatch) {
+        console.log("   ❓ Are errors displayed to the user?");
+      }
+
+      console.log("\n   💡 Frontend Best Practice:");
+      console.log("      - Use your notification system for user feedback");
+      console.log("      - Error boundaries for component errors");
+      console.log("      - Display user-friendly error messages\n");
+    }
+
+    // Database reminders
+    if (categories.database.length > 0) {
+      console.log("🗄️  Database Changes Detected");
+      console.log(`   ${categories.database.length} file(s) edited\n`);
+      console.log("   ❓ Did you verify column names against schema?");
+      console.log("   ❓ Are migrations tested?\n");
+    }
+
+    console.log("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
+    console.log("💡 TIP: Disable with SKIP_ERROR_REMINDER=1");
+    console.log("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n");
+
+    process.exit(0);
+  } catch (err) {
+    // Silently fail - this is just a reminder, not critical
+    process.exit(0);
+  }
+}
+
+main().catch(() => process.exit(0));

.claude/hooks/package-lock.json

@@ -0,0 +1,556 @@
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+            }
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+        "node_modules/get-tsconfig": {
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+            "resolved": "https://registry.npmjs.org/get-tsconfig/-/get-tsconfig-4.13.0.tgz",
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+            "license": "MIT",
+            "dependencies": {
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+            },
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+                "url": "https://github.com/privatenumber/get-tsconfig?sponsor=1"
+            }
+        },
+        "node_modules/resolve-pkg-maps": {
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+            "license": "MIT",
+            "funding": {
+                "url": "https://github.com/privatenumber/resolve-pkg-maps?sponsor=1"
+            }
+        },
+        "node_modules/tsx": {
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+            "resolved": "https://registry.npmjs.org/tsx/-/tsx-4.20.6.tgz",
+            "integrity": "sha512-ytQKuwgmrrkDTFP4LjR0ToE2nqgy886GpvRSpU0JAnrdBYppuY5rLkRUYPU1yCryb24SsKBTL/hlDQAEFVwtZg==",
+            "license": "MIT",
+            "dependencies": {
+                "esbuild": "~0.25.0",
+                "get-tsconfig": "^4.7.5"
+            },
+            "bin": {
+                "tsx": "dist/cli.mjs"
+            },
+            "engines": {
+                "node": ">=18.0.0"
+            },
+            "optionalDependencies": {
+                "fsevents": "~2.3.3"
+            }
+        },
+        "node_modules/typescript": {
+            "version": "5.9.3",
+            "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+            "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+            "license": "Apache-2.0",
+            "bin": {
+                "tsc": "bin/tsc",
+                "tsserver": "bin/tsserver"
+            },
+            "engines": {
+                "node": ">=14.17"
+            }
+        },
+        "node_modules/undici-types": {
+            "version": "6.21.0",
+            "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+            "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+            "license": "MIT"
+        }
+    }
+}

.claude/hooks/package.json

@@ -0,0 +1,16 @@
+{
+    "name": "claude-hooks",
+    "version": "1.0.0",
+    "description": "TypeScript hooks for Claude Code skill auto-activation",
+    "private": true,
+    "type": "module",
+    "scripts": {
+        "check": "tsc --noEmit",
+        "test": "tsx skill-activation-prompt.ts < test-input.json"
+    },
+    "dependencies": {
+        "@types/node": "^20.11.0",
+        "tsx": "^4.7.0",
+        "typescript": "^5.3.3"
+    }
+}

.claude/hooks/post-tool-use-tracker.sh

@@ -0,0 +1,170 @@
+#!/bin/bash
+set -e
+
+# Post-tool-use hook that tracks edited files and their repos
+# This runs after Edit, MultiEdit, or Write tools complete successfully
+
+
+# Read tool information from stdin
+tool_info=$(cat)
+
+
+# Extract relevant data
+tool_name=$(echo "$tool_info" | jq -r '.tool_name // empty')
+file_path=$(echo "$tool_info" | jq -r '.tool_input.file_path // empty')
+session_id=$(echo "$tool_info" | jq -r '.session_id // empty')
+
+
+# Skip if not an edit tool or no file path
+if [[ ! "$tool_name" =~ ^(Edit|MultiEdit|Write)$ ]] || [[ -z "$file_path" ]]; then
+    exit 0  # Exit 0 for skip conditions
+fi
+
+# Skip markdown files
+if [[ "$file_path" =~ \.(md|markdown)$ ]]; then
+    exit 0  # Exit 0 for skip conditions
+fi
+
+# Create cache directory in project
+cache_dir="$CLAUDE_PROJECT_DIR/.claude/tsc-cache/${session_id:-default}"
+mkdir -p "$cache_dir"
+
+# Function to detect repo from file path
+detect_repo() {
+    local file="$1"
+    local project_root="$CLAUDE_PROJECT_DIR"
+
+    # Remove project root from path
+    local relative_path="${file#$project_root/}"
+
+    # Extract first directory component
+    local repo=$(echo "$relative_path" | cut -d'/' -f1)
+
+    # Common project directory patterns
+    case "$repo" in
+        # Frontend variations
+        frontend|client|web|app|ui)
+            echo "$repo"
+            ;;
+        # Backend variations
+        backend|server|api|src|services|worker)
+            echo "$repo"
+            ;;
+        # Database
+        database|prisma|migrations)
+            echo "$repo"
+            ;;
+        # Package/monorepo structure
+        packages)
+            # For monorepos, get the package name
+            local package=$(echo "$relative_path" | cut -d'/' -f2)
+            if [[ -n "$package" ]]; then
+                echo "packages/$package"
+            else
+                echo "$repo"
+            fi
+            ;;
+        # Default case
+        *)
+            # Check if it's a source file in root
+            if [[ ! "$relative_path" =~ / ]]; then
+                echo "root"
+            else
+                echo "unknown"
+            fi
+            ;;
+    esac
+}
+
+# Function to get build command for repo
+get_build_command() {
+    local repo="$1"
+    local project_root="$CLAUDE_PROJECT_DIR"
+    local repo_path="$project_root/$repo"
+
+    # Check if package.json exists and has a build script
+    if [[ -f "$repo_path/package.json" ]]; then
+        if grep -q '"build"' "$repo_path/package.json" 2>/dev/null; then
+            # Detect package manager (prefer pnpm, then npm, then yarn)
+            if [[ -f "$repo_path/pnpm-lock.yaml" ]]; then
+                echo "cd $repo_path && pnpm build"
+            elif [[ -f "$repo_path/package-lock.json" ]]; then
+                echo "cd $repo_path && npm run build"
+            elif [[ -f "$repo_path/yarn.lock" ]]; then
+                echo "cd $repo_path && yarn build"
+            else
+                echo "cd $repo_path && npm run build"
+            fi
+            return
+        fi
+    fi
+
+    # Special case for database with Prisma
+    if [[ "$repo" == "database" ]] || [[ "$repo" =~ prisma ]]; then
+        if [[ -f "$repo_path/schema.prisma" ]] || [[ -f "$repo_path/prisma/schema.prisma" ]]; then
+            echo "cd $repo_path && npx prisma generate"
+            return
+        fi
+    fi
+
+    # No build command found
+    echo ""
+}
+
+# Function to get TSC command for repo
+get_tsc_command() {
+    local repo="$1"
+    local project_root="$CLAUDE_PROJECT_DIR"
+    local repo_path="$project_root/$repo"
+
+    # Check if tsconfig.json exists
+    if [[ -f "$repo_path/tsconfig.json" ]]; then
+        # Check for Vite/React-specific tsconfig
+        if [[ -f "$repo_path/tsconfig.app.json" ]]; then
+            echo "cd $repo_path && npx tsc --project tsconfig.app.json --noEmit"
+        else
+            echo "cd $repo_path && npx tsc --noEmit"
+        fi
+        return
+    fi
+
+    # No TypeScript config found
+    echo ""
+}
+
+# Detect repo
+repo=$(detect_repo "$file_path")
+
+# Skip if unknown repo
+if [[ "$repo" == "unknown" ]] || [[ -z "$repo" ]]; then
+    exit 0  # Exit 0 for skip conditions
+fi
+
+# Log edited file
+echo "$(date +%s):$file_path:$repo" >> "$cache_dir/edited-files.log"
+
+# Update affected repos list
+if ! grep -q "^$repo$" "$cache_dir/affected-repos.txt" 2>/dev/null; then
+    echo "$repo" >> "$cache_dir/affected-repos.txt"
+fi
+
+# Store build commands
+build_cmd=$(get_build_command "$repo")
+tsc_cmd=$(get_tsc_command "$repo")
+
+if [[ -n "$build_cmd" ]]; then
+    echo "$repo:build:$build_cmd" >> "$cache_dir/commands.txt.tmp"
+fi
+
+if [[ -n "$tsc_cmd" ]]; then
+    echo "$repo:tsc:$tsc_cmd" >> "$cache_dir/commands.txt.tmp"
+fi
+
+# Remove duplicates from commands
+if [[ -f "$cache_dir/commands.txt.tmp" ]]; then
+    sort -u "$cache_dir/commands.txt.tmp" > "$cache_dir/commands.txt"
+    rm -f "$cache_dir/commands.txt.tmp"
+fi
+
+# Exit cleanly
+exit 0

.claude/hooks/skill-activation-prompt.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+set -e
+
+cd "$CLAUDE_PROJECT_DIR/.claude/hooks"
+cat | npx tsx skill-activation-prompt.ts

.claude/hooks/skill-activation-prompt.ts

@@ -0,0 +1,136 @@
+#!/usr/bin/env node
+import { readFileSync } from "fs";
+import { join } from "path";
+
+interface HookInput {
+  session_id: string;
+  transcript_path: string;
+  cwd: string;
+  permission_mode: string;
+  prompt: string;
+}
+
+interface PromptTriggers {
+  keywords?: string[];
+  intentPatterns?: string[];
+}
+
+interface SkillRule {
+  type: "guardrail" | "domain";
+  enforcement: "block" | "suggest" | "warn";
+  priority: "critical" | "high" | "medium" | "low";
+  promptTriggers?: PromptTriggers;
+}
+
+interface SkillRules {
+  version: string;
+  skills: Record<string, SkillRule>;
+}
+
+interface MatchedSkill {
+  name: string;
+  matchType: "keyword" | "intent";
+  config: SkillRule;
+}
+
+async function main() {
+  try {
+    // Read input from stdin
+    const input = readFileSync(0, "utf-8");
+    const data: HookInput = JSON.parse(input);
+    const prompt = data.prompt.toLowerCase();
+
+    // Load skill rules
+    const projectDir = process.env.CLAUDE_PROJECT_DIR || "$HOME/project";
+    const rulesPath = join(projectDir, ".claude", "skills", "skill-rules.json");
+    const rules: SkillRules = JSON.parse(readFileSync(rulesPath, "utf-8"));
+
+    const matchedSkills: MatchedSkill[] = [];
+
+    // Check each skill for matches
+    for (const [skillName, config] of Object.entries(rules.skills)) {
+      const triggers = config.promptTriggers;
+      if (!triggers) {
+        continue;
+      }
+
+      // Keyword matching
+      if (triggers.keywords) {
+        const keywordMatch = triggers.keywords.some((kw) =>
+          prompt.includes(kw.toLowerCase()),
+        );
+        if (keywordMatch) {
+          matchedSkills.push({ name: skillName, matchType: "keyword", config });
+          continue;
+        }
+      }
+
+      // Intent pattern matching
+      if (triggers.intentPatterns) {
+        const intentMatch = triggers.intentPatterns.some((pattern) => {
+          const regex = new RegExp(pattern, "i");
+          return regex.test(prompt);
+        });
+        if (intentMatch) {
+          matchedSkills.push({ name: skillName, matchType: "intent", config });
+        }
+      }
+    }
+
+    // Generate output if matches found
+    if (matchedSkills.length > 0) {
+      let output = "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n";
+      output += "🎯 SKILL ACTIVATION CHECK\n";
+      output += "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n\n";
+
+      // Group by priority
+      const critical = matchedSkills.filter(
+        (s) => s.config.priority === "critical",
+      );
+      const high = matchedSkills.filter((s) => s.config.priority === "high");
+      const medium = matchedSkills.filter(
+        (s) => s.config.priority === "medium",
+      );
+      const low = matchedSkills.filter((s) => s.config.priority === "low");
+
+      if (critical.length > 0) {
+        output += "⚠️ CRITICAL SKILLS (REQUIRED):\n";
+        critical.forEach((s) => (output += `  → ${s.name}\n`));
+        output += "\n";
+      }
+
+      if (high.length > 0) {
+        output += "📚 RECOMMENDED SKILLS:\n";
+        high.forEach((s) => (output += `  → ${s.name}\n`));
+        output += "\n";
+      }
+
+      if (medium.length > 0) {
+        output += "💡 SUGGESTED SKILLS:\n";
+        medium.forEach((s) => (output += `  → ${s.name}\n`));
+        output += "\n";
+      }
+
+      if (low.length > 0) {
+        output += "📌 OPTIONAL SKILLS:\n";
+        low.forEach((s) => (output += `  → ${s.name}\n`));
+        output += "\n";
+      }
+
+      output += "ACTION: Use Skill tool BEFORE responding\n";
+      output += "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n";
+
+      console.log(output);
+    }
+
+    process.exit(0);
+  } catch (err) {
+    console.error("Error in skill-activation-prompt hook:", err);
+    process.exit(1);
+  }
+}
+
+main().catch((err) => {
+  console.error("Uncaught error:", err);
+  process.exit(1);
+});

.claude/hooks/tsconfig.json

@@ -0,0 +1,19 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "lib": ["ES2022"],
+    "outDir": "./dist",
+    "rootDir": ".",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true,
+    "types": ["node"]
+  },
+  "include": ["*.ts"],
+  "exclude": ["node_modules", "dist"]
+}

.claude/settings.json

@@ -10,5 +10,30 @@
       "Bash(tail:*)"
     ],
     "deny": []
+  },
+  "enableAllProjectMcpServers": true,
+  "enabledMcpjsonServers": ["sequential-thinking"],
+  "hooks": {
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/skill-activation-prompt.sh"
+          }
+        ]
+      }
+    ],
+    "PostToolUse": [
+      {
+        "matcher": "Edit|MultiEdit|Write",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/post-tool-use-tracker.sh"
+          }
+        ]
+      }
+    ]
   }
 }

.claude/skills/README.md

@@ -0,0 +1,304 @@
+# Skills
+
+Production-tested skills for Claude Code that auto-activate based on context.
+
+---
+
+## What Are Skills?
+
+Skills are modular knowledge bases that Claude loads when needed. They provide:
+
+- Domain-specific guidelines
+- Best practices
+- Code examples
+- Anti-patterns to avoid
+
+**Problem:** Skills don't activate automatically by default.
+
+**Solution:** This showcase includes the hooks + configuration to make them activate.
+
+---
+
+## Available Skills
+
+### skill-developer (Meta-Skill)
+
+**Purpose:** Creating and managing Claude Code skills
+
+**Files:** 7 resource files (426 lines total)
+
+**Use when:**
+
+- Creating new skills
+- Understanding skill structure
+- Working with skill-rules.json
+- Debugging skill activation
+
+**Customization:** ✅ None - copy as-is
+
+**[View Skill →](skill-developer/)**
+
+---
+
+### backend-dev-guidelines
+
+**Purpose:** Node.js/Express/TypeScript development patterns
+
+**Files:** 12 resource files (304 lines main + resources)
+
+**Covers:**
+
+- Layered architecture (Routes → Controllers → Services → Repositories)
+- BaseController pattern
+- Prisma database access
+- Sentry error tracking
+- Zod validation
+- UnifiedConfig pattern
+- Dependency injection
+- Testing strategies
+
+**Use when:**
+
+- Creating/modifying API routes
+- Building controllers or services
+- Database operations with Prisma
+- Setting up error tracking
+
+**Customization:** ⚠️ Update `pathPatterns` in skill-rules.json to match your backend directories
+
+**Example pathPatterns:**
+
+```json
+{
+  "pathPatterns": [
+    "src/api/**/*.ts", // Single app with src/api
+    "backend/**/*.ts", // Backend directory
+    "services/*/src/**/*.ts" // Multi-service monorepo
+  ]
+}
+```
+
+**[View Skill →](backend-dev-guidelines/)**
+
+---
+
+## How to Add a Skill to Your Project
+
+### Quick Integration
+
+**For Claude Code:**
+
+```
+User: "Add the backend-dev-guidelines skill to my project"
+
+Claude should:
+1. Ask about project structure
+2. Copy skill directory
+3. Update skill-rules.json with their paths
+4. Verify integration
+```
+
+See [CLAUDE_INTEGRATION_GUIDE.md](../../CLAUDE_INTEGRATION_GUIDE.md) for complete instructions.
+
+### Manual Integration
+
+**Step 1: Copy the skill directory**
+
+```bash
+cp -r claude-code-infrastructure-showcase/.claude/skills/backend-dev-guidelines \\
+      your-project/.claude/skills/
+```
+
+**Step 2: Update skill-rules.json**
+
+If you don't have one, create it:
+
+```bash
+cp claude-code-infrastructure-showcase/.claude/skills/skill-rules.json \\
+   your-project/.claude/skills/
+```
+
+Then customize the `pathPatterns` for your project:
+
+```json
+{
+  "skills": {
+    "backend-dev-guidelines": {
+      "fileTriggers": {
+        "pathPatterns": [
+          "YOUR_BACKEND_PATH/**/*.ts" // ← Update this!
+        ]
+      }
+    }
+  }
+}
+```
+
+**Step 3: Test**
+
+- Edit a file in your backend directory
+- The skill should activate automatically
+
+---
+
+## skill-rules.json Configuration
+
+### What It Does
+
+Defines when skills should activate based on:
+
+- **Keywords** in user prompts ("backend", "API", "route")
+- **Intent patterns** (regex matching user intent)
+- **File path patterns** (editing backend files)
+- **Content patterns** (code contains Prisma queries)
+
+### Configuration Format
+
+```json
+{
+  "skill-name": {
+    "type": "domain" | "guardrail",
+    "enforcement": "suggest" | "block",
+    "priority": "high" | "medium" | "low",
+    "promptTriggers": {
+      "keywords": ["list", "of", "keywords"],
+      "intentPatterns": ["regex patterns"]
+    },
+    "fileTriggers": {
+      "pathPatterns": ["path/to/files/**/*.ts"],
+      "contentPatterns": ["import.*Prisma"]
+    }
+  }
+}
+```
+
+### Enforcement Levels
+
+- **suggest**: Skill appears as suggestion, doesn't block
+- **block**: Must use skill before proceeding (guardrail)
+
+**Use "block" for:**
+
+- Preventing breaking changes (MUI v6→v7)
+- Critical database operations
+- Security-sensitive code
+
+**Use "suggest" for:**
+
+- General best practices
+- Domain guidance
+- Code organization
+
+---
+
+## Creating Your Own Skills
+
+See the **skill-developer** skill for complete guide on:
+
+- Skill YAML frontmatter structure
+- Resource file organization
+- Trigger pattern design
+- Testing skill activation
+
+**Quick template:**
+
+```markdown
+---
+name: my-skill
+description: What this skill does
+---
+
+# My Skill Title
+
+## Purpose
+
+[Why this skill exists]
+
+## When to Use This Skill
+
+[Auto-activation scenarios]
+
+## Quick Reference
+
+[Key patterns and examples]
+
+## Resource Files
+
+- [topic-1.md](resources/topic-1.md)
+- [topic-2.md](resources/topic-2.md)
+```
+
+---
+
+## Troubleshooting
+
+### Skill isn't activating
+
+**Check:**
+
+1. Is skill directory in `.claude/skills/`?
+2. Is skill listed in `skill-rules.json`?
+3. Do `pathPatterns` match your files?
+4. Are hooks installed and working?
+5. Is settings.json configured correctly?
+
+**Debug:**
+
+```bash
+# Check skill exists
+ls -la .claude/skills/
+
+# Validate skill-rules.json
+cat .claude/skills/skill-rules.json | jq .
+
+# Check hooks are executable
+ls -la .claude/hooks/*.sh
+
+# Test hook manually
+./.claude/hooks/skill-activation-prompt.sh
+```
+
+### Skill activates too often
+
+Update skill-rules.json:
+
+- Make keywords more specific
+- Narrow `pathPatterns`
+- Increase specificity of `intentPatterns`
+
+### Skill never activates
+
+Update skill-rules.json:
+
+- Add more keywords
+- Broaden `pathPatterns`
+- Add more `intentPatterns`
+
+---
+
+## For Claude Code
+
+**When integrating a skill for a user:**
+
+1. **Read [CLAUDE_INTEGRATION_GUIDE.md](../../CLAUDE_INTEGRATION_GUIDE.md)** first
+2. Ask about their project structure
+3. Customize `pathPatterns` in skill-rules.json
+4. Verify the skill file has no hardcoded paths
+5. Test activation after integration
+
+**Common mistakes:**
+
+- Keeping example paths (blog-api/, frontend/)
+- Not asking about monorepo vs single-app
+- Copying skill-rules.json without customization
+
+---
+
+## Next Steps
+
+1. **Start simple:** Add one skill that matches your work
+2. **Verify activation:** Edit a relevant file, skill should suggest
+3. **Add more:** Once first skill works, add others
+4. **Customize:** Adjust triggers based on your workflow
+
+**Questions?** See [CLAUDE_INTEGRATION_GUIDE.md](../../CLAUDE_INTEGRATION_GUIDE.md) for comprehensive integration instructions.

.claude/skills/backend-dev-guidelines/SKILL.md

@@ -0,0 +1,590 @@
+---
+name: backend-dev-guidelines
+description: Comprehensive backend development guide for Langfuse's Next.js 14/tRPC/Express/TypeScript monorepo. Use when creating tRPC routers, public API endpoints, BullMQ queue processors, services, or working with tRPC procedures, Next.js API routes, Prisma database access, ClickHouse analytics queries, Redis queues, OpenTelemetry instrumentation, Zod v4 validation, env.mjs configuration, tenant isolation patterns, or async patterns. Covers layered architecture (tRPC procedures → services, queue processors → services), dual database system (PostgreSQL + ClickHouse), projectId filtering for multi-tenant isolation, traceException error handling, observability patterns, and testing strategies (Jest for web, vitest for worker).
+---
+
+# Backend Development Guidelines
+
+## Purpose
+
+Establish consistency and best practices across Langfuse's backend packages (web, worker, packages/shared) using Next.js 14, tRPC, BullMQ, and TypeScript patterns.
+
+## When to Use This Skill
+
+Automatically activates when working on:
+
+- Creating or modifying tRPC routers and procedures
+- Creating or modifying public API endpoints (REST)
+- Creating or modifying BullMQ queue consumers and producers
+- Building services with business logic
+- Authenticating API requests
+- Accessing resources based on entitlements
+- Implementing middleware (tRPC, NextAuth, public API)
+- Database operations with Prisma (PostgreSQL) or ClickHouse
+- Observability with OpenTelemetry, DataDog, logger, and traceException
+- Input validation with Zod v4
+- Environment configuration from env variables
+- Backend testing and refactoring
+
+---
+
+## Quick Start
+
+### UI: New tRPC Feature Checklist (Web)
+
+- [ ] **Router**: Define in `features/[feature]/server/*Router.ts`
+- [ ] **Procedures**: Use appropriate procedure type (protected, public)
+- [ ] **Authentication**: Use JWT authorization via middlewares.
+- [ ] **Entitlement check**: Access resources based on resource and role
+- [ ] **Validation**: Zod v4 schema for input
+- [ ] **Service**: Business logic in service file
+- [ ] **Error handling**: Use traceException wrapper
+- [ ] **Tests**: Unit + integration tests in `__tests__/`
+- [ ] **Config**: Access via env.mjs
+
+### SDKs: New Public API Endpoint Checklist (Web)
+
+- [ ] **Route file**: Create in `pages/api/public/`
+- [ ] **Wrapper**: Use `withMiddlewares` + `createAuthedProjectAPIRoute`
+- [ ] **Types**: Define in `features/public-api/types/`
+- [ ] **Authentication**: Authorization via basic auth
+- [ ] **Validation**: Zod schemas for query/body/response
+- [ ] **Versioning**: Versioning in API path and Zod schemas for query/body/response
+- [ ] **Fern API Docs**: Update `fern/apis/server/definition/` to match TypeScript types
+- [ ] **Tests**: Add end-to-end test in `__tests__/async/`
+
+### New Queue Processor Checklist (Worker)
+
+- [ ] **Processor**: Create in `worker/src/queues/`
+- [ ] **Queue types**: Create queue types in `packages/shared/src/server/queues`
+- [ ] **Service**: Business logic in `features/` or `worker/src/features/`
+- [ ] **Error handling**: Distinguish between errors which should fail queue processing and errors which should result in a succeeded event.
+- [ ] **Queue registration**: Add to WorkerManager in app.ts
+- [ ] **Tests**: Add vitest tests in worker
+
+---
+
+## Architecture Overview
+
+### Layered Architecture
+
+```
+# Web Package (Next.js 14)
+
+┌─ tRPC API ──────────────────┐   ┌── Public REST API ──────────┐
+│                             │   │                             │
+│  HTTP Request               │   │  HTTP Request               │
+│      ↓                      │   │      ↓                      │
+│  tRPC Procedure             │   │  withMiddlewares +          │
+│  (protectedProjectProcedure)│   │  createAuthedProjectAPIRoute│
+│      ↓                      │   │      ↓                      │
+│  Service (business logic)   │   │  Service (business logic)   │
+│      ↓                      │   │      ↓                      │
+│  Prisma / ClickHouse        │   │  Prisma / ClickHouse        │
+│                             │   │                             │
+└─────────────────────────────┘   └─────────────────────────────┘
+                 ↓
+            [optional]: Publish to Redis BullMQ queue
+                 ↓
+┌─ Worker Package (Express) ──────────────────────────────────┐
+│                                                             │
+│  BullMQ Queue Job                                           │
+│      ↓                                                      │
+│  Queue Processor (handles job)                              │
+│      ↓                                                      │
+│  Service (business logic)                                   │
+│      ↓                                                      │
+│  Prisma / ClickHouse                                        │
+│                                                             │
+└─────────────────────────────────────────────────────────────┘
+```
+
+**Key Principles:**
+
+- **Web**: tRPC procedures for UI OR public API routes for SDKs → Services → Database
+- **Worker**: Queue processors → Services → Database
+- **packages/shared**: Shared code for Web and Worker
+
+See [architecture-overview.md](architecture-overview.md) for complete details.
+
+---
+
+## Directory Structure
+
+### Web Package (`/web/`)
+
+```
+web/src/
+├── features/                # Feature-organized code
+│   ├── [feature-name]/
+│   │   ├── server/          # Backend logic
+│   │   │   ├── *Router.ts   # tRPC router
+│   │   │   └── service.ts   # Business logic
+│   │   ├── components/      # React components
+│   │   └── types/           # Feature types
+├── server/
+│   ├── api/
+│   │   ├── routers/         # tRPC routers
+│   │   ├── trpc.ts          # tRPC setup & middleware
+│   │   └── root.ts          # Main router
+│   ├── auth.ts              # NextAuth.js config
+│   └── db.ts                # Database client
+├── pages/
+│   ├── api/
+│   │   ├── public/          # Public REST APIs
+│   │   └── trpc/            # tRPC endpoint
+│   └── [routes].tsx         # Next.js pages
+├── __tests__/               # Jest tests
+│   └── async/               # Integration tests
+├── instrumentation.ts       # OpenTelemetry (FIRST IMPORT)
+└── env.mjs                  # Environment config
+```
+
+### Worker Package (`/worker/`)
+
+```
+worker/src/
+├── queues/                  # BullMQ processors
+│   ├── evalQueue.ts
+│   ├── ingestionQueue.ts
+│   └── workerManager.ts
+├── features/                # Business logic
+│   └── [feature]/
+│       └── service.ts
+├── instrumentation.ts       # OpenTelemetry (FIRST IMPORT)
+├── app.ts                   # Express setup + queue registration
+├── env.ts                   # Environment config
+└── index.ts                 # Server start
+```
+
+### Shared Package (`/packages/shared/`)
+
+```
+shared/src/
+├── server/                  # Server utilities
+│   ├── auth/                # Authentication helpers
+│   ├── clickhouse/          # ClickHouse client & schema
+│   ├── instrumentation/     # OpenTelemetry helpers
+│   ├── llm/                 # LLM integration utilities
+│   ├── redis/               # Redis queues & cache
+│   ├── repositories/        # Data repositories
+│   ├── services/            # Shared services
+│   ├── utils/               # Server utilities
+│   ├── logger.ts
+│   └── queues.ts
+├── encryption/              # Encryption utilities
+├── features/                # Feature-specific code
+├── tableDefinitions/        # Table schemas
+├── utils/                   # Shared utilities
+├── constants.ts
+├── db.ts                    # Prisma client
+├── env.ts                   # Environment config
+└── index.ts                 # Main exports
+```
+
+**Import Paths (package.json exports):**
+
+The shared package exposes specific import paths for different use cases:
+
+| Import Path                                | Maps To                           | Use For                                                         |
+| ------------------------------------------ | --------------------------------- | --------------------------------------------------------------- |
+| `@langfuse/shared`                         | `dist/src/index.js`               | General types, schemas, utilities, constants                    |
+| `@langfuse/shared/src/db`                  | `dist/src/db.js`                  | Prisma client and database types                                |
+| `@langfuse/shared/src/server`              | `dist/src/server/index.js`        | Server-side utilities (queues, auth, services, instrumentation) |
+| `@langfuse/shared/src/server/auth/apiKeys` | `dist/src/server/auth/apiKeys.js` | API key management utilities                                    |
+| `@langfuse/shared/encryption`              | `dist/src/encryption/index.js`    | Encryption and signature utilities                              |
+
+**Usage Examples:**
+
+```typescript
+// General imports - types, schemas, constants, interfaces
+import {
+  CloudConfigSchema,
+  StringNoHTML,
+  AnnotationQueueObjectType,
+  type APIScoreV2,
+  type ColumnDefinition,
+  Role,
+} from "@langfuse/shared";
+
+// Database - Prisma client and types
+import { prisma, Prisma, JobExecutionStatus } from "@langfuse/shared/src/db";
+import { type DB as Database } from "@langfuse/shared";
+
+// Server utilities - queues, services, auth, instrumentation
+import {
+  logger,
+  instrumentAsync,
+  traceException,
+  redis,
+  getTracesTable,
+  StorageService,
+  sendMembershipInvitationEmail,
+  invalidateApiKeysForProject,
+  recordIncrement,
+  recordHistogram,
+} from "@langfuse/shared/src/server";
+
+// API key management (specific path)
+import { createAndAddApiKeysToDb } from "@langfuse/shared/src/server/auth/apiKeys";
+
+// Encryption utilities
+import { encrypt, decrypt, sign, verify } from "@langfuse/shared/encryption";
+```
+
+**What Goes Where:**
+
+The shared package provides types, utilities, and server code used by both web and worker packages. It has **5 export paths** that control frontend vs backend access:
+
+| Import Path                                | Usage                 | What's Included                                                                    |
+| ------------------------------------------ | --------------------- | ---------------------------------------------------------------------------------- |
+| `@langfuse/shared`                         | ✅ Frontend + Backend | Prisma types, Zod schemas, constants, table definitions, domain models, utilities  |
+| `@langfuse/shared/src/db`                  | 🔒 Backend only       | Prisma client instance                                                             |
+| `@langfuse/shared/src/server`              | 🔒 Backend only       | Services, repositories, queues, auth, ClickHouse, LLM integration, instrumentation |
+| `@langfuse/shared/src/server/auth/apiKeys` | 🔒 Backend only       | API key management (separated to avoid circular deps)                              |
+| `@langfuse/shared/encryption`              | 🔒 Backend only       | Database field encryption/decryption                                               |
+
+**Naming Conventions:**
+
+- tRPC Routers: `camelCaseRouter.ts` - `datasetRouter.ts`
+- Services: `service.ts` in feature directory
+- Queue Processors: `camelCaseQueue.ts` - `evalQueue.ts`
+- Public APIs: `kebab-case.ts` - `dataset-items.ts`
+
+---
+
+## Core Principles
+
+### 1. tRPC Procedures Delegate to Services
+
+```typescript
+// ❌ NEVER: Business logic in procedures
+export const traceRouter = createTRPCRouter({
+  byId: protectedProjectProcedure
+    .input(z.object({ traceId: z.string() }))
+    .query(async ({ input, ctx }) => {
+      // 200 lines of logic here
+    }),
+});
+
+// ✅ ALWAYS: Delegate to service
+export const traceRouter = createTRPCRouter({
+  byId: protectedProjectProcedure
+    .input(z.object({ traceId: z.string() }))
+    .query(async ({ input, ctx }) => {
+      return await getTraceById(input.traceId);
+    }),
+});
+```
+
+### 2. Access Config via env.mjs, NEVER process.env
+
+```typescript
+// ❌ NEVER (except in env.mjs itself)
+const dbUrl = process.env.DATABASE_URL;
+
+// ✅ ALWAYS
+import { env } from "@/src/env.mjs";
+const dbUrl = env.DATABASE_URL;
+```
+
+### 3. Validate ALL Input with Zod v4
+
+```typescript
+import { z } from "zod/v4";
+
+const schema = z.object({
+  email: z.string().email(),
+  projectId: z.string(),
+});
+const validated = schema.parse(input);
+```
+
+### 4. Services Use Prisma Directly for Simple CRUD or Repositories for Complex Queries
+
+```typescript
+// Services use Prisma directly for simple CRUD
+import { prisma } from "@langfuse/shared/src/db";
+
+const dataset = await prisma.dataset.findUnique({
+  where: { id: datasetId, projectId }, // Always filter by projectId for tenant isolation
+});
+
+// Or use repositories for complex queries (traces, observations, scores)
+import { getTracesTable } from "@langfuse/shared/src/server";
+
+const traces = await getTracesTable({
+  projectId,
+  filter: [...],
+  limit: 1000,
+});
+```
+
+### 6. Observability: OpenTelemetry + DataDog (Not Sentry for Backend)
+
+**Langfuse uses OpenTelemetry for backend observability, with traces and logs sent to DataDog.**
+
+```typescript
+// Import observability utilities
+import {
+  logger,          // Winston logger with OpenTelemetry/DataDog context
+  traceException,  // Record exceptions to OpenTelemetry spans
+  instrumentAsync, // Create instrumented spans
+} from "@langfuse/shared/src/server";
+
+// Structured logging (includes trace_id, span_id, dd.trace_id)
+logger.info("Processing dataset", { datasetId, projectId });
+logger.error("Failed to create dataset", { error: err.message });
+
+// Record exceptions to OpenTelemetry (sent to DataDog)
+try {
+  await operation();
+} catch (error) {
+  traceException(error); // Records to current span
+  throw error;
+}
+
+// Instrument critical operations (all API routes auto-instrumented)
+const result = await instrumentAsync(
+  { name: "dataset.create" },
+  async (span) => {
+    span.setAttributes({ datasetId, projectId });
+    // Operation here
+    return dataset;
+  },
+);
+```
+
+**Note**: Frontend uses Sentry, but backend (tRPC, API routes, services, worker) uses OpenTelemetry + DataDog.
+
+### 7. Comprehensive Testing Required
+
+Write tests for all new features and bug fixes. See [testing-guide.md](resources/testing-guide.md) for detailed examples.
+
+**Test Types:**
+
+| Type        | Framework | Location                                | Purpose                      |
+| ----------- | --------- | --------------------------------------- | ---------------------------- |
+| Integration | Jest      | `web/src/__tests__/async/`              | Full API endpoint testing    |
+| tRPC        | Jest      | `web/src/__tests__/async/`              | tRPC procedures with auth    |
+| Service     | Jest      | `web/src/__tests__/async/repositories/` | Repository/service functions |
+| Worker      | Vitest    | `worker/src/__tests__/`                 | Queue processors & streams   |
+
+**Quick Examples:**
+
+```typescript
+// Integration Test (Public API)
+const res = await makeZodVerifiedAPICall(
+  PostDatasetsV1Response, "POST", "/api/public/datasets",
+  { name: "test-dataset" }, auth
+);
+expect(res.status).toBe(200);
+
+// tRPC Test
+const { caller } = await prepare(); // Creates session + caller
+const response = await caller.automations.getAutomations({ projectId });
+expect(response).toHaveLength(1);
+
+// Service Test
+const result = await getObservationsWithModelDataFromEventsTable({
+  projectId, filter: [...], limit: 1000, offset: 0
+});
+expect(result.length).toBeGreaterThan(0);
+
+// Worker Test (vitest)
+const stream = await getObservationStream({ projectId, filter: [] });
+const rows = [];
+for await (const chunk of stream) rows.push(chunk);
+expect(rows).toHaveLength(2);
+```
+
+**Key Principles:**
+
+- Use unique IDs (`randomUUID()`) to avoid test interference
+- Clean up test data or use unique project IDs
+- Tests must be independent and runnable in any order
+- Never use `pruneDatabase` in tests
+
+### 8. Always Filter by projectId for Tenant Isolation
+
+```typescript
+// ✅ CORRECT: Filter by projectId for tenant isolation
+const trace = await prisma.trace.findUnique({
+  where: { id: traceId, projectId }, // Required for multi-tenant data isolation
+});
+
+// ✅ CORRECT: ClickHouse queries also require projectId
+const traces = await queryClickhouse({
+  query: `
+    SELECT * FROM traces
+    WHERE project_id = {projectId: String}
+    AND timestamp >= {startTime: DateTime64(3)}
+  `,
+  params: { projectId, startTime },
+});
+```
+
+### 9. Keep Fern API Definitions in Sync with TypeScript Types
+
+When modifying public API types in `web/src/features/public-api/types/`, the corresponding Fern API definitions in `fern/apis/server/definition/` must be updated to match.
+
+**Zod to Fern Type Mapping:**
+
+| Zod Type | Fern Type | Example |
+| -------- | --------- | ------- |
+| `.nullish()` | `optional<nullable<T>>` | `z.string().nullish()` → `optional<nullable<string>>` |
+| `.nullable()` | `nullable<T>` | `z.string().nullable()` → `nullable<string>` |
+| `.optional()` | `optional<T>` | `z.string().optional()` → `optional<string>` |
+| Always present | `T` | `z.string()` → `string` |
+
+**Source References:**
+
+Add a comment at the top of each Fern type referencing the TypeScript source file:
+
+```yaml
+# Source: web/src/features/public-api/types/traces.ts - APITrace
+Trace:
+  properties:
+    id: string
+    name:
+      type: nullable<string>
+```
+
+---
+
+## Common Imports
+
+```typescript
+// tRPC (Web)
+import { z } from "zod/v4";
+import {
+  createTRPCRouter,
+  protectedProjectProcedure,
+} from "@/src/server/api/trpc";
+import { TRPCError } from "@trpc/server";
+
+// Database
+import { prisma } from "@langfuse/shared/src/db";
+import type { Prisma } from "@prisma/client";
+
+// ClickHouse
+import {
+  queryClickhouse,
+  queryClickhouseStream,
+  upsertClickhouse,
+} from "@langfuse/shared/src/server";
+
+// Observability - OpenTelemetry + DataDog (NOT Sentry for backend)
+import {
+  logger,          // Winston logger with OTEL/DataDog trace context
+  traceException,  // Record exceptions to OpenTelemetry spans
+  instrumentAsync, // Create instrumented spans for operations
+} from "@langfuse/shared/src/server";
+
+// Config
+import { env } from "@/src/env.mjs"; // web
+// or
+import { env } from "./env"; // worker
+
+// Public API (Web)
+import { withMiddlewares } from "@/src/features/public-api/server/withMiddlewares";
+import { createAuthedProjectAPIRoute } from "@/src/features/public-api/server/createAuthedProjectAPIRoute";
+
+// Queue Processing (Worker)
+import { Job } from "bullmq";
+import { QueueName, TQueueJobTypes } from "@langfuse/shared/src/server";
+```
+
+---
+
+## Quick Reference
+
+### HTTP Status Codes
+
+| Code | Use Case     |
+| ---- | ------------ |
+| 200  | Success      |
+| 201  | Created      |
+| 400  | Bad Request  |
+| 401  | Unauthorized |
+| 403  | Forbidden    |
+| 404  | Not Found    |
+| 500  | Server Error |
+
+### Example Features to Reference
+
+Reference existing Langfuse features for implementation patterns:
+- **Datasets** (`web/src/features/datasets/`) - Complete feature with tRPC router, public API, and service
+- **Prompts** (`web/src/features/prompts/`) - Feature with versioning and templates
+- **Evaluations** (`web/src/features/evals/`) - Complex feature with worker integration
+- **Public API** (`web/src/features/public-api/`) - Middleware and route patterns
+
+---
+
+## Anti-Patterns to Avoid
+
+❌ Business logic in routes/procedures
+❌ Direct process.env usage (always use env.mjs/env.ts)
+❌ Missing error handling
+❌ No input validation (always use Zod v4)
+❌ Missing projectId filter on tenant-scoped queries
+❌ console.log instead of logger/traceException (OpenTelemetry)
+
+---
+
+## Navigation Guide
+
+| Need to...                | Read this                                                    |
+| ------------------------- | ------------------------------------------------------------ |
+| Understand architecture   | [architecture-overview.md](resources/architecture-overview.md)         |
+| Create routes/controllers | [routing-and-controllers.md](resources/routing-and-controllers.md)     |
+| Organize business logic   | [services-and-repositories.md](resources/services-and-repositories.md) |
+| Create middleware         | [middleware-guide.md](resources/middleware-guide.md)                   |
+| Database access           | [database-patterns.md](resources/database-patterns.md)                 |
+| Manage config             | [configuration.md](resources/configuration.md)                         |
+| Write tests               | [testing-guide.md](resources/testing-guide.md)                         |
+
+---
+
+## Resource Files
+
+### [architecture-overview.md](resources/architecture-overview.md)
+
+Three-layer architecture (tRPC/Public API → Services → Data Access), request lifecycle for tRPC/Public API/Worker, Next.js 14 directory structure, dual database system (PostgreSQL + ClickHouse), separation of concerns, repository pattern for complex queries
+
+### [routing-and-controllers.md](resources/routing-and-controllers.md)
+
+Next.js file-based routing, tRPC router patterns, Public REST API routes, layered architecture (Entry Points → Services → Repositories → Database), service layer organization, anti-patterns to avoid
+
+### [services-and-repositories.md](resources/services-and-repositories.md)
+
+Service layer overview, dependency injection patterns, singleton patterns, repository pattern for data access, service design principles, caching strategies, testing services
+
+### [middleware-guide.md](resources/middleware-guide.md)
+
+tRPC middleware (withErrorHandling, withOtelInstrumentation, enforceUserIsAuthed), seven tRPC procedure types (publicProcedure, authenticatedProcedure, protectedProjectProcedure, etc.), Public API middleware (withMiddlewares, createAuthedProjectAPIRoute), authentication patterns (NextAuth for tRPC, Basic Auth for Public API)
+
+### [database-patterns.md](resources/database-patterns.md)
+
+Dual database architecture (PostgreSQL via Prisma + ClickHouse via direct client), PostgreSQL CRUD operations, ClickHouse query patterns (queryClickhouse, queryClickhouseStream, upsertClickhouse), repository pattern for complex queries, tenant isolation with projectId filtering, when to use which database
+
+### [configuration.md](resources/configuration.md)
+
+Environment variable validation with Zod, package-specific configs (web/env.mjs with t3-oss/env-nextjs, worker/env.ts, shared/env.ts), NEXT_PUBLIC_LANGFUSE_CLOUD_REGION usage, LANGFUSE_EE_LICENSE_KEY for enterprise features, best practices for env management
+
+### [testing-guide.md](resources/testing-guide.md)
+
+Integration tests (Public API with makeZodVerifiedAPICall), tRPC tests (createInnerTRPCContext, appRouter.createCaller), service-level tests (repository/service functions), worker tests (vitest with streams), test isolation principles, running tests (Jest for web, vitest for worker)
+
+---
+
+## Related Skills
+
+- **database-verification** - Verify column names and schema consistency
+- **skill-developer** - Meta-skill for creating and managing skills
+
+---
+
+**Skill Status**: COMPLETE ✅
+**Line Count**: ~540 lines
+**Progressive Disclosure**: 7 resource files ✅

.claude/skills/backend-dev-guidelines/resources/architecture-overview.md

@@ -0,0 +1,870 @@
+# Architecture Overview - Langfuse Backend
+
+Complete guide to the layered architecture pattern used in Langfuse's Next.js 14/tRPC/Express monorepo.
+
+## Table of Contents
+
+- [Layered Architecture Pattern](#layered-architecture-pattern)
+- [Request Lifecycle](#request-lifecycle)
+- [Directory Structure](#directory-structure)
+- [Module Organization](#module-organization)
+- [Separation of Concerns](#separation-of-concerns)
+- [Database Architecture](#database-architecture)
+
+---
+
+## Layered Architecture Pattern
+
+Langfuse uses a **three-layer architecture** with two primary entry points (tRPC and Public API) plus async processing via Worker.
+
+### The Three Layers
+
+```
+# Web Package (Next.js 14)
+
+┌─ tRPC API ──────────────────┐   ┌── Public REST API ──────────┐
+│                             │   │                             │
+│  HTTP Request               │   │  HTTP Request               │
+│      ↓                      │   │      ↓                      │
+│  tRPC Procedure             │   │  withMiddlewares +          │
+│  (protectedProjectProcedure)│   │  createAuthedProjectAPIRoute│
+│      ↓                      │   │      ↓                      │
+│  Service (business logic)   │   │  Service (business logic)   │
+│      ↓                      │   │      ↓                      │
+│  Prisma / ClickHouse        │   │  Prisma / ClickHouse        │
+│                             │   │                             │
+└─────────────────────────────┘   └─────────────────────────────┘
+                 ↓
+            [optional]: Publish to Redis BullMQ queue
+                 ↓
+┌─ Worker Package (Express) ──────────────────────────────────┐
+│                                                             │
+│  BullMQ Queue Job                                           │
+│      ↓                                                      │
+│  Queue Processor (handles job)                              │
+│      ↓                                                      │
+│  Service (business logic)                                   │
+│      ↓                                                      │
+│  Prisma / ClickHouse                                        │
+│                                                             │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### Layer Breakdown
+
+**Layer 1: API Entry Points**
+
+Two types of entry points:
+
+- **tRPC Procedures** - Type-safe RPC for UI
+  - Located in `features/[feature]/server/*Router.ts`
+  - Uses middleware for auth/validation
+  - Types shared between client/server
+
+- **Public REST APIs** - REST endpoints for SDKs
+  - Located in `pages/api/public/`
+  - Uses `withMiddlewares` + `createAuthedProjectAPIRoute`
+  - Versioned with Zod schemas
+
+**Layer 2: Services**
+
+- Business logic and orchestration
+- Shared between tRPC, Public API, and Worker
+- Located in `features/[feature]/server/service.ts`
+- No HTTP/Request/Response knowledge
+- Use repositories for complex queries or Prisma directly for simple CRUD
+
+**Layer 3: Data Access**
+
+- **Repositories** for complex data access patterns (traces, observations, scores, events)
+- **Direct Prisma** for simple CRUD operations in services
+- PostgreSQL for transactional data
+- ClickHouse for analytics/traces (accessed via repositories)
+- Redis for caching/queues
+
+**Async Processing Layer: Worker**
+
+- BullMQ queue processors
+- Same service layer as Web
+- Handles long-running operations
+
+### Why This Architecture?
+
+**Testability:**
+
+- tRPC procedures easily testable with type-safe callers
+- Services tested independently with mocked DB
+- Queue processors tested with vitest
+- Clear test boundaries
+
+**Maintainability:**
+
+- Business logic isolated in services
+- tRPC provides type safety end-to-end
+- Changes to API don't affect service layer
+- Easy to locate and fix bugs
+
+**Reusability:**
+
+- Services used by tRPC, Public API, Worker, and scripts
+- Business logic not tied to HTTP or tRPC
+- Consistent patterns across packages
+
+**Scalability:**
+
+- Worker handles async operations separately
+- Easy to add new tRPC procedures
+- Clear patterns to follow
+- Shared code in packages/shared
+
+---
+
+## Request Lifecycle
+
+### tRPC Request Flow (UI)
+
+```typescript
+1. HTTP POST /api/trpc/datasets.create
+   ↓
+2. Next.js API route catches request (pages/api/trpc/[trpc].ts)
+   ↓
+3. tRPC router resolves procedure:
+   - Match route to procedure in datasetRouter.ts
+   ↓
+4. tRPC middleware chain executes:
+   - protectedProjectProcedure (authentication)
+   - hasEntitlement checks
+   - Input validation with Zod v4
+   ↓
+5. Procedure handler calls service:
+   export const datasetRouter = createTRPCRouter({
+     create: protectedProjectProcedure
+       .input(createDatasetSchema)
+       .mutation(async ({ input, ctx }) => {
+         return await createDataset(input, ctx.session);
+       }),
+   })
+   ↓
+6. Service executes business logic:
+   - Validate business rules
+   - Use repositories for complex queries or Prisma directly
+   - ClickHouse queries via repositories if needed
+   ↓
+7. Database operations:
+   - prisma.dataset.create({ data })
+   - clickhouse queries via getTracesTable()
+   ↓
+8. Response flows back:
+   Database → Service → Procedure → tRPC → Client
+```
+
+### Public API Request Flow (SDKs)
+
+```typescript
+1. HTTP POST /api/public/datasets
+   ↓
+2. Next.js API route handler (pages/api/public/datasets.ts)
+   ↓
+3. withMiddlewares wrapper executes:
+   - Basic auth verification
+   - Rate limiting
+   - CORS handling
+   ↓
+4. createAuthedProjectAPIRoute handler:
+   - Parse and validate request with Zod v4
+   - Extract auth context (project, user)
+   ↓
+5. Handler calls service function:
+   const dataset = await createDataset({
+     name: req.body.name,
+     projectId: req.auth.projectId,
+   });
+   ↓
+6. Service executes (same as tRPC path)
+   ↓
+7. Response formatted and returned:
+   res.status(201).json(dataset);
+```
+
+### Worker/Queue Processing Flow
+
+```typescript
+1. Job added to Redis BullMQ queue:
+   await evalQueue.add("eval-job", {
+     evalId, projectId
+   });
+   ↓
+2. Worker picks up job from Redis
+   ↓
+3. Queue processor handles job:
+   // worker/src/queues/evalQueue.ts
+   async process(job: Job<EvalJobType>) {
+     await processEvaluation(job.data);
+   }
+   ↓
+4. Processor calls service:
+   - Same service layer as Web
+   - Business logic execution
+   ↓
+5. Service performs operations:
+   - Prisma transactions
+   - ClickHouse queries
+   - External API calls (LLMs)
+   ↓
+6. Job completes or fails:
+   - Success: job.updateProgress(100)
+   - Failure: throw error for retry
+```
+
+---
+
+## Directory Structure
+
+### Web Package (`/web/src/`)
+
+```
+web/src/
+├── features/                    # Feature-organized code
+│   ├── datasets/
+│   │   ├── server/             # Backend logic
+│   │   │   ├── datasetRouter.ts    # tRPC router
+│   │   │   └── datasetService.ts   # Business logic
+│   │   ├── components/         # React components
+│   │   └── types/              # Feature types
+│   │
+│   ├── public-api/
+│   │   ├── server/
+│   │   │   ├── withMiddlewares.ts
+│   │   │   └── createAuthedProjectAPIRoute.ts
+│   │   └── types/              # API schemas
+│   │
+│   └── [feature-name]/
+│       ├── server/
+│       │   ├── *Router.ts      # tRPC router
+│       │   └── service.ts      # Business logic
+│       ├── components/
+│       └── types/
+│
+├── server/
+│   ├── api/
+│   │   ├── routers/            # tRPC routers
+│   │   ├── trpc.ts             # tRPC setup & middleware
+│   │   └── root.ts             # Main router combining all
+│   ├── auth.ts                 # NextAuth.js config
+│   └── db.ts                   # Database utilities
+│
+├── pages/
+│   ├── api/
+│   │   ├── public/             # Public REST APIs
+│   │   │   ├── datasets.ts
+│   │   │   └── traces.ts
+│   │   └── trpc/
+│   │       └── [trpc].ts       # tRPC endpoint
+│   └── [routes].tsx            # Next.js pages
+│
+├── __tests__/                  # Jest tests
+│   ├── async/                  # Integration tests
+│   └── sync/                   # Unit tests
+│
+├── instrumentation.ts          # OpenTelemetry (FIRST IMPORT)
+└── env.mjs                     # Environment config
+```
+
+### Worker Package (`/worker/src/`)
+
+```
+worker/src/
+├── queues/                     # BullMQ processors
+│   ├── evalQueue.ts           # Evaluation jobs
+│   ├── ingestionQueue.ts      # Data ingestion
+│   ├── batchExportQueue.ts    # Batch exports
+│   └── workerManager.ts       # Queue registration
+│
+├── features/                   # Business logic
+│   └── [feature]/
+│       └── service.ts
+│
+├── __tests__/                  # Vitest tests
+│
+├── instrumentation.ts          # OpenTelemetry (FIRST IMPORT)
+├── app.ts                      # Express setup + queue registration
+├── env.ts                      # Environment config
+└── index.ts                    # Server start
+```
+
+### Shared Package (`/packages/shared/`)
+
+The shared package provides types, utilities, and server code used by both web and worker packages. It has **5 export paths** that control frontend vs backend access:
+
+| Import Path                                | Usage                 | What's Included                                                                    |
+| ------------------------------------------ | --------------------- | ---------------------------------------------------------------------------------- |
+| `@langfuse/shared`                         | ✅ Frontend + Backend | Prisma types, Zod schemas, constants, table definitions, domain models, utilities  |
+| `@langfuse/shared/src/db`                  | 🔒 Backend only       | Prisma client instance                                                             |
+| `@langfuse/shared/src/server`              | 🔒 Backend only       | Services, repositories, queues, auth, ClickHouse, LLM integration, instrumentation |
+| `@langfuse/shared/src/server/auth/apiKeys` | 🔒 Backend only       | API key management (separated to avoid circular deps)                              |
+| `@langfuse/shared/encryption`              | 🔒 Backend only       | Database field encryption/decryption                                               |
+
+**Key Structure:**
+
+```
+packages/shared/src/
+├── server/                  # 🔒 All server-only code
+│   ├── auth/                # Authentication & authorization
+│   ├── clickhouse/          # ClickHouse client & queries
+│   ├── redis/               # Redis client & 30+ queue types
+│   ├── repositories/        # Data access (traces, observations, scores, events)
+│   ├── services/            # Business services (Storage, Email, Slack, etc.)
+│   ├── llm/                 # LLM integration
+│   ├── instrumentation/     # OpenTelemetry
+│   └── queues.ts, logger.ts, filterToPrisma.ts, etc.
+│
+├── features/                # ✅ Feature types (evals, scores, prompts, datasets)
+├── domain/                  # ✅ Domain models (automations, webhooks, etc.)
+├── tableDefinitions/        # ✅ Table schemas
+├── interfaces/              # ✅ Shared interfaces (filters, orderBy)
+├── utils/                   # ✅ Utilities (JSON, Zod, string checks)
+├── encryption/              # 🔒 Encryption utilities
+└── db.ts, constants.ts, types.ts, etc.
+```
+
+**Common Import Patterns:**
+
+```typescript
+// ✅ Main export - Safe for frontend + backend
+import {
+  Prisma,
+  Role,
+  type Dataset,
+  CloudConfigSchema,
+} from "@langfuse/shared";
+
+// 🔒 Database - Backend only
+import { prisma } from "@langfuse/shared/src/db";
+
+// 🔒 Server utilities - Backend only
+import {
+  logger,
+  instrumentAsync,
+  traceException,
+  redis,
+  clickhouseClient,
+  StorageService,
+  fetchLLMCompletion,
+  filterToPrisma,
+} from "@langfuse/shared/src/server";
+
+// 🔒 API keys - Backend only
+import { createAndAddApiKeysToDb } from "@langfuse/shared/src/server/auth/apiKeys";
+
+// 🔒 Encryption - Backend only
+import { encrypt, decrypt } from "@langfuse/shared/encryption";
+```
+
+---
+
+## Module Organization
+
+### Feature-Based Organization (Recommended)
+
+For most features, organize by domain within `features/`:
+
+```
+src/features/datasets/
+├── server/                 # Backend code
+│   ├── datasetRouter.ts   # tRPC procedures
+│   └── service.ts         # Business logic
+├── components/            # React components
+│   ├── DatasetTable.tsx
+│   └── DatasetForm.tsx
+├── types/                 # Feature types
+│   └── index.ts
+└── utils/                 # Feature utilities
+```
+
+**When to use:**
+
+- Any feature with UI + API
+- Clear domain boundary
+- Multiple related procedures
+
+### Subdomain Organization
+
+For complex features with multiple subdomains:
+
+```
+src/features/evaluations/
+├── server/
+│   ├── evalRouter.ts          # Main router
+│   ├── evalService.ts         # Core service
+│   ├── templates/             # Template subdomain
+│   │   ├── templateRouter.ts
+│   │   └── templateService.ts
+│   └── configs/               # Config subdomain
+│       ├── configRouter.ts
+│       └── configService.ts
+├── components/
+│   ├── templates/
+│   └── configs/
+└── types/
+```
+
+**When to use:**
+
+- Feature has 10+ files
+- Clear subdomains exist
+- Logical grouping improves clarity
+
+### Flat Organization (Rare)
+
+For small, standalone features:
+
+```
+src/server/api/routers/
+├── healthRouter.ts            # Simple health check
+└── versionRouter.ts           # Version info
+```
+
+**When to use:**
+
+- Simple features (1-2 procedures)
+- No UI components
+- Standalone utilities
+
+---
+
+## Separation of Concerns
+
+### What Goes Where
+
+**tRPC Procedures (Entry Layer):**
+
+- ✅ Procedure definitions (query/mutation)
+- ✅ Middleware application (auth, validation)
+- ✅ Input schemas (Zod v4)
+- ✅ Service delegation
+- ✅ Error transformation (TRPCError)
+- ❌ Business logic (belongs in services)
+- ❌ Database operations (belongs in services)
+- ❌ Complex validation (belongs in services)
+
+**Public API Routes (Entry Layer):**
+
+- ✅ Route registration
+- ✅ Middleware wrapper application
+- ✅ Input validation (Zod v4)
+- ✅ Service delegation
+- ✅ Response formatting
+- ✅ HTTP status codes
+- ❌ Business logic (belongs in services)
+- ❌ Database operations (belongs in services)
+
+**Services Layer:**
+
+- ✅ Business logic
+- ✅ Business rules enforcement
+- ✅ Transaction orchestration
+- ✅ Repository calls for complex queries
+- ✅ Direct Prisma operations for simple CRUD
+- ✅ ClickHouse queries (via repositories)
+- ✅ Redis cache access
+- ✅ External API calls (LLMs, etc.)
+- ❌ HTTP concerns (Request/Response)
+- ❌ tRPC-specific types (TRPCError in entry layer)
+- ❌ NextAuth session handling (passed as parameter)
+
+**Queue Processors (Worker):**
+
+- ✅ Job registration and configuration
+- ✅ Job data extraction
+- ✅ Service delegation
+- ✅ Progress updates
+- ✅ Error handling (retry logic)
+- ❌ Business logic (belongs in services)
+- ❌ Database operations (belongs in services)
+
+### Example: Dataset Creation
+
+**tRPC Procedure (Entry Point):**
+
+```typescript
+// web/src/features/datasets/server/datasetRouter.ts
+import { z } from "zod/v4";
+import {
+  createTRPCRouter,
+  protectedProjectProcedure,
+} from "@/src/server/api/trpc";
+import { TRPCError } from "@trpc/server";
+import { createDataset } from "./service";
+
+export const datasetRouter = createTRPCRouter({
+  create: protectedProjectProcedure
+    .input(
+      z.object({
+        name: z.string(),
+        description: z.string().optional(),
+        projectId: z.string(),
+      }),
+    )
+    .mutation(async ({ input, ctx }) => {
+      try {
+        return await createDataset({
+          ...input,
+          userId: ctx.session.user.id,
+        });
+      } catch (error) {
+        throw new TRPCError({
+          code: "INTERNAL_SERVER_ERROR",
+          message: "Failed to create dataset",
+          cause: error,
+        });
+      }
+    }),
+});
+```
+
+**Service (Business Logic):**
+
+```typescript
+// web/src/features/datasets/server/service.ts
+import { prisma } from "@langfuse/shared/src/db";
+import { instrumentAsync, traceException } from "@langfuse/shared/src/server";
+
+export async function createDataset(data: {
+  name: string;
+  description?: string;
+  projectId: string;
+  userId: string;
+}) {
+  return await instrumentAsync({ name: "dataset.create" }, async (span) => {
+    // Business rule: Check for duplicate names in project
+    const existing = await prisma.dataset.findFirst({
+      where: {
+        name: data.name,
+        projectId: data.projectId,
+      },
+    });
+
+    if (existing) {
+      throw new Error(`Dataset with name "${data.name}" already exists`);
+    }
+
+    // Create dataset
+    const dataset = await prisma.dataset.create({
+      data: {
+        name: data.name,
+        description: data.description,
+        projectId: data.projectId,
+        createdById: data.userId,
+      },
+    });
+
+    span.setAttributes({
+      datasetId: dataset.id,
+      projectId: dataset.projectId,
+    });
+
+    return dataset;
+  });
+}
+```
+
+**Public API (Alternative Entry Point):**
+
+```typescript
+// web/src/pages/api/public/datasets.ts
+import { withMiddlewares } from "@/src/features/public-api/server/withMiddlewares";
+import { createAuthedProjectAPIRoute } from "@/src/features/public-api/server/createAuthedProjectAPIRoute";
+import { createDataset } from "@/src/features/datasets/server/service";
+import { z } from "zod/v4";
+
+const createDatasetSchema = z.object({
+  name: z.string(),
+  description: z.string().optional(),
+});
+
+export default withMiddlewares({
+  POST: createAuthedProjectAPIRoute({
+    name: "Create Dataset",
+    bodySchema: createDatasetSchema,
+    fn: async ({ body, auth, res }) => {
+      const dataset = await createDataset({
+        name: body.name,
+        description: body.description,
+        projectId: auth.scope.projectId,
+        userId: auth.scope.userId,
+      });
+
+      return res.status(201).json(dataset);
+    },
+  }),
+});
+```
+
+**Queue Processor (Async Processing):**
+
+```typescript
+// worker/src/queues/datasetExportQueue.ts
+import { Job } from "bullmq";
+import { exportDataset } from "../features/datasets/exportService";
+
+export async function processDatasetExport(
+  job: Job<{ datasetId: string; projectId: string; format: string }>,
+) {
+  const { datasetId, projectId, format } = job.data;
+
+  await job.updateProgress(10);
+
+  // Delegate to service
+  const exportUrl = await exportDataset({
+    datasetId,
+    projectId,
+    format,
+    onProgress: (percent) => job.updateProgress(percent),
+  });
+
+  await job.updateProgress(100);
+
+  return { exportUrl };
+}
+```
+
+**Notice:** Each layer has clear, distinct responsibilities!
+
+- **Entry layers** (tRPC/Public API/Queue) handle protocol concerns
+- **Service layer** contains all business logic
+- **Data layer** accessed via repositories (complex queries) or Prisma directly (simple CRUD)
+
+---
+
+## Database Architecture
+
+### Dual Database System
+
+Langfuse uses two databases with different purposes:
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                       Application                           │
+│                                                             │
+│  ┌──────────────┐              ┌──────────────┐           │
+│  │  PostgreSQL  │              │  ClickHouse  │           │
+│  │              │              │              │           │
+│  │ Transactional│              │  Analytics   │           │
+│  │    Data      │              │    Data      │           │
+│  └──────────────┘              └──────────────┘           │
+│         ↑                              ↑                   │
+│         │                              │                   │
+│    Prisma ORM                    Direct SQL               │
+│  (schema migrations)              (via client)            │
+└─────────────────────────────────────────────────────────────┘
+```
+
+**PostgreSQL (Primary Database):**
+
+- Accessed via Prisma ORM
+- Transactional data (users, projects, datasets, etc.)
+- ACID guarantees
+- Schema managed via `prisma migrate`
+- Located in `packages/shared/prisma/`
+
+**ClickHouse (Analytics Database):**
+
+- Accessed via direct SQL queries
+- High-volume trace/observation data
+- Columnar storage for analytics
+- Optimized for aggregations
+- Schema in `packages/shared/src/server/clickhouse/`
+- Schema managed via `golang-migrate`
+
+**Redis (Cache & Queues):**
+
+- BullMQ job queues
+- Caching layer
+- Session storage
+- Rate limiting
+
+### Data Access Pattern
+
+**Services access databases directly:**
+
+```typescript
+// PostgreSQL via Prisma
+import { prisma } from "@langfuse/shared/src/db";
+
+const dataset = await prisma.dataset.create({ data });
+
+// ClickHouse via helper functions
+import { getTracesTable } from "@langfuse/shared/src/server";
+
+const traces = await getTracesTable({
+  projectId,
+  filter: [...],
+  limit: 1000,
+});
+
+// Redis via queue/cache utilities
+import { redis } from "@langfuse/shared/src/server";
+
+await redis.set(`cache:${key}`, value, "EX", 3600);
+```
+
+**Repository Pattern:**
+
+Langfuse uses repositories in `packages/shared/src/server/repositories/` for complex data access patterns. Repositories provide:
+
+- Abstraction over complex queries (traces, observations, scores, events)
+- Data converters for transforming database models to application models
+- ClickHouse query builders and stream processing
+- Reusable query logic across services
+
+Services can use repositories for complex operations OR Prisma directly for simple CRUD operations.
+
+---
+
+## Best Practices
+
+### 1. Keep Procedures Thin
+
+tRPC procedures should only handle protocol concerns:
+
+```typescript
+// ❌ BAD: Business logic in procedure
+export const datasetRouter = createTRPCRouter({
+  create: protectedProjectProcedure
+    .input(createSchema)
+    .mutation(async ({ input, ctx }) => {
+      // 200 lines of business logic here
+      const existing = await prisma.dataset.findFirst(...);
+      if (existing) throw new Error(...);
+      const dataset = await prisma.dataset.create(...);
+      await sendNotification(...);
+      return dataset;
+    }),
+});
+
+// ✅ GOOD: Delegate to service
+export const datasetRouter = createTRPCRouter({
+  create: protectedProjectProcedure
+    .input(createSchema)
+    .mutation(async ({ input, ctx }) => {
+      return await createDataset(input, ctx.session);
+    }),
+});
+```
+
+### 2. Services Should Be Protocol-Agnostic
+
+Services should work regardless of entry point:
+
+```typescript
+// ✅ GOOD: No HTTP/tRPC knowledge
+export async function createDataset(data: CreateDatasetInput) {
+  // Pure business logic
+  return await prisma.dataset.create({ data });
+}
+
+// ❌ BAD: tRPC-specific
+export async function createDataset(ctx: TRPCContext) {
+  // Coupled to tRPC
+}
+```
+
+### 3. Observability with OpenTelemetry + DataDog
+
+**Langfuse uses OpenTelemetry for backend observability, with traces and logs sent to DataDog.**
+
+Use structured logging and instrumentation:
+
+```typescript
+import {
+  logger,
+  traceException,
+  instrumentAsync,
+} from "@langfuse/shared/src/server";
+
+export async function processEvaluation(evalId: string) {
+  return await instrumentAsync(
+    { name: "evaluation.process", attributes: { evalId } },
+    async (span) => {
+      // Structured logging (includes trace_id, span_id, dd.trace_id)
+      logger.info("Starting evaluation", { evalId });
+
+      try {
+        // Operation here
+        const result = await runEvaluation(evalId);
+
+        span.setAttributes({
+          score: result.score,
+          status: "success",
+        });
+
+        return result;
+      } catch (error) {
+        // Record exception to OpenTelemetry span (sent to DataDog)
+        traceException(error, span);
+        logger.error("Evaluation failed", { evalId, error: error.message });
+        throw error;
+      }
+    },
+  );
+}
+```
+
+**Note**: Frontend uses Sentry for error tracking, but backend (tRPC, API routes, services, worker) uses OpenTelemetry + DataDog.
+
+### 4. Use Proper Error Handling
+
+Transform errors at entry points:
+
+```typescript
+// tRPC procedure
+try {
+  return await service();
+} catch (error) {
+  traceException(error); // Record to OpenTelemetry span (sent to DataDog)
+  throw new TRPCError({
+    code: "INTERNAL_SERVER_ERROR",
+    message: "User-friendly message",
+    cause: error,
+  });
+}
+
+// Public API
+try {
+  return await service();
+} catch (error) {
+  traceException(error); // Record to OpenTelemetry span (sent to DataDog)
+  return res.status(500).json({
+    error: "User-friendly message",
+  });
+}
+```
+
+### 5. Validate at Entry Points
+
+Use Zod v4 for all input validation:
+
+```typescript
+import { z } from "zod/v4";
+
+// tRPC
+.input(z.object({
+  name: z.string().min(1).max(255),
+  projectId: z.string(),
+}))
+
+// Public API
+const bodySchema = z.object({
+  name: z.string().min(1).max(255),
+});
+const validated = bodySchema.parse(req.body);
+```
+
+---
+
+**Related Files:**
+
+- [SKILL.md](../SKILL.md) - Main guide
+- [routing-and-controllers.md](routing-and-controllers.md) - tRPC and Public API details
+- [services-and-repositories.md](services-and-repositories.md) - Service patterns
+- [testing-guide.md](testing-guide.md) - Testing strategies

.claude/skills/backend-dev-guidelines/resources/configuration.md

@@ -0,0 +1,562 @@
+# Configuration Management - Environment Variables
+
+Complete guide to managing configuration across Langfuse's monorepo packages.
+
+## Table of Contents
+
+- [Environment Variable Pattern](#environment-variable-pattern)
+- [Package-Specific Configuration](#package-specific-configuration)
+- [Special Environment Variables](#special-environment-variables)
+- [Best Practices](#best-practices)
+
+---
+
+## Environment Variable Pattern
+
+### Why Zod-Validated Environment Variables?
+
+**Problems with raw process.env:**
+
+- ❌ No type safety
+- ❌ No validation
+- ❌ Hard to test
+- ❌ Runtime errors for typos
+- ❌ No default values
+
+**Benefits of Zod validation:**
+
+- ✅ Type-safe configuration
+- ✅ Validated at startup
+- ✅ Clear error messages
+- ✅ Default values
+- ✅ Environment-specific transformation
+
+---
+
+## Package-Specific Configuration
+
+Each package has its own `env.ts` or `env.mjs` file that validates and exports environment variables:
+
+```
+langfuse/
+├── web/src/env.mjs              # Next.js app (t3-env pattern)
+├── worker/src/env.ts            # Worker service (Zod schema)
+├── packages/shared/src/env.ts   # Shared config (Zod schema)
+└── ee/src/env.ts                # Enterprise Edition (Zod schema)
+```
+
+### Web Package (`web/src/env.mjs`)
+
+Uses **t3-oss/env-nextjs** for Next.js-specific validation with server/client separation.
+
+**Key Features:**
+
+- Separates server-side and client-side environment variables
+- Client variables must be prefixed with `NEXT_PUBLIC_`
+- Validates at build time (unless `DOCKER_BUILD=1`)
+- `runtimeEnv` section manually maps all variables
+
+**Structure:**
+
+```typescript
+import { createEnv } from "@t3-oss/env-nextjs";
+import { z } from "zod";
+
+export const env = createEnv({
+  // Server-side only variables (never exposed to client)
+  server: {
+    DATABASE_URL: z.string().url(),
+    NEXTAUTH_SECRET: z.string().min(1),
+    SALT: z.string(),
+    CLICKHOUSE_URL: z.string().url(),
+    // ... 100+ server variables
+  },
+
+  // Client-side variables (exposed to browser)
+  client: {
+    NEXT_PUBLIC_LANGFUSE_CLOUD_REGION: z
+      .enum(["US", "EU", "STAGING", "DEV", "HIPAA"])
+      .optional(),
+    NEXT_PUBLIC_SIGN_UP_DISABLED: z.enum(["true", "false"]).default("false"),
+    // ... client variables
+  },
+
+  // Runtime mapping (required for Next.js edge runtime)
+  runtimeEnv: {
+    DATABASE_URL: process.env.DATABASE_URL,
+    NEXTAUTH_SECRET: process.env.NEXTAUTH_SECRET,
+    NEXT_PUBLIC_LANGFUSE_CLOUD_REGION:
+      process.env.NEXT_PUBLIC_LANGFUSE_CLOUD_REGION,
+    // ... must map ALL variables
+  },
+
+  // Skip validation in Docker builds
+  skipValidation: process.env.DOCKER_BUILD === "1",
+  emptyStringAsUndefined: true,
+});
+```
+
+**Usage:**
+
+```typescript
+// In server-side code (tRPC, API routes)
+import { env } from "@/src/env.mjs";
+
+const dbUrl = env.DATABASE_URL;
+const salt = env.SALT;
+
+// In client-side code (React components)
+import { env } from "@/src/env.mjs";
+
+const region = env.NEXT_PUBLIC_LANGFUSE_CLOUD_REGION;
+```
+
+### Worker Package (`worker/src/env.ts`)
+
+Uses **plain Zod schema** for Express.js worker service.
+
+**Structure:**
+
+```typescript
+import { z } from "zod/v4";
+import { removeEmptyEnvVariables } from "@langfuse/shared";
+
+const EnvSchema = z.object({
+  BUILD_ID: z.string().optional(),
+  NODE_ENV: z
+    .enum(["development", "test", "production"])
+    .default("development"),
+  DATABASE_URL: z.string(),
+  PORT: z.coerce.number().positive().max(65536).default(3030),
+
+  // ClickHouse
+  CLICKHOUSE_URL: z.string().url(),
+  CLICKHOUSE_USER: z.string(),
+  CLICKHOUSE_PASSWORD: z.string(),
+
+  // S3 Event Upload (required)
+  LANGFUSE_S3_EVENT_UPLOAD_BUCKET: z.string({
+    error: "Langfuse requires a bucket name for S3 Event Uploads.",
+  }),
+
+  // Queue concurrency settings
+  LANGFUSE_INGESTION_QUEUE_PROCESSING_CONCURRENCY: z.coerce
+    .number()
+    .positive()
+    .default(20),
+  LANGFUSE_EVAL_EXECUTION_WORKER_CONCURRENCY: z.coerce
+    .number()
+    .positive()
+    .default(5),
+
+  // Queue consumer toggles
+  QUEUE_CONSUMER_INGESTION_QUEUE_IS_ENABLED: z
+    .enum(["true", "false"])
+    .default("true"),
+  QUEUE_CONSUMER_BATCH_EXPORT_QUEUE_IS_ENABLED: z
+    .enum(["true", "false"])
+    .default("true"),
+
+  // ... 150+ worker-specific variables
+});
+
+export const env: z.infer<typeof EnvSchema> =
+  process.env.DOCKER_BUILD === "1"
+    ? (process.env as any)
+    : EnvSchema.parse(removeEmptyEnvVariables(process.env));
+```
+
+**Usage:**
+
+```typescript
+import { env } from "./env";
+
+const concurrency = env.LANGFUSE_INGESTION_QUEUE_PROCESSING_CONCURRENCY;
+const s3Bucket = env.LANGFUSE_S3_EVENT_UPLOAD_BUCKET;
+```
+
+### Shared Package (`packages/shared/src/env.ts`)
+
+Uses **plain Zod schema** for configuration shared between web and worker.
+
+**Structure:**
+
+```typescript
+import { z } from "zod/v4";
+import { removeEmptyEnvVariables } from "./utils/environment";
+
+const EnvSchema = z.object({
+  NODE_ENV: z
+    .enum(["development", "test", "production"])
+    .default("development"),
+
+  // Redis configuration
+  REDIS_HOST: z.string().nullish(),
+  REDIS_PORT: z.coerce.number().positive().max(65536).default(6379).nullable(),
+  REDIS_AUTH: z.string().nullish(),
+  REDIS_CONNECTION_STRING: z.string().nullish(),
+  REDIS_CLUSTER_ENABLED: z.enum(["true", "false"]).default("false"),
+
+  // ClickHouse
+  CLICKHOUSE_URL: z.string().url(),
+  CLICKHOUSE_USER: z.string(),
+  CLICKHOUSE_PASSWORD: z.string(),
+  CLICKHOUSE_MAX_OPEN_CONNECTIONS: z.coerce.number().int().default(25),
+
+  // S3 Event Upload
+  LANGFUSE_S3_EVENT_UPLOAD_BUCKET: z.string(),
+  LANGFUSE_S3_EVENT_UPLOAD_REGION: z.string().optional(),
+
+  // Logging
+  LANGFUSE_LOG_LEVEL: z
+    .enum(["trace", "debug", "info", "warn", "error", "fatal"])
+    .optional(),
+  LANGFUSE_LOG_FORMAT: z.enum(["text", "json"]).default("text"),
+
+  // Encryption
+  ENCRYPTION_KEY: z
+    .string()
+    .length(
+      64,
+      "ENCRYPTION_KEY must be 256 bits, 64 string characters in hex format, generate via: openssl rand -hex 32",
+    )
+    .optional(),
+
+  // ... 80+ shared variables
+});
+
+export const env: z.infer<typeof EnvSchema> =
+  process.env.DOCKER_BUILD === "1"
+    ? (process.env as any)
+    : EnvSchema.parse(removeEmptyEnvVariables(process.env));
+```
+
+**Usage:**
+
+```typescript
+import { env } from "@langfuse/shared/src/env";
+
+const redisHost = env.REDIS_HOST;
+const clickhouseUrl = env.CLICKHOUSE_URL;
+```
+
+### Enterprise Edition Package (`ee/src/env.ts`)
+
+Minimal Zod schema for EE-specific variables.
+
+**Structure:**
+
+```typescript
+import { z } from "zod/v4";
+import { removeEmptyEnvVariables } from "@langfuse/shared";
+
+const EnvSchema = z.object({
+  NEXT_PUBLIC_LANGFUSE_CLOUD_REGION: z.string().optional(),
+  LANGFUSE_EE_LICENSE_KEY: z.string().optional(),
+});
+
+export const env = EnvSchema.parse(removeEmptyEnvVariables(process.env));
+```
+
+**Usage:**
+
+```typescript
+import { env } from "@langfuse/ee/src/env";
+
+const licenseKey = env.LANGFUSE_EE_LICENSE_KEY;
+```
+
+---
+
+## Special Environment Variables
+
+### NEXT_PUBLIC_LANGFUSE_CLOUD_REGION
+
+**Purpose:** Identifies the cloud deployment region for Langfuse Cloud.
+
+**Type:** `"US" | "EU" | "STAGING" | "DEV" | "HIPAA" | undefined`
+
+**Where Used:**
+
+- **web/src/env.mjs** - Client-side accessible (prefixed with `NEXT_PUBLIC_`)
+- **ee/src/env.ts** - Enterprise features
+- **packages/shared/src/env.ts** - Shared logic
+- **worker/src/env.ts** - Worker processing
+
+**When Set:**
+
+| Environment              | Value                  | Purpose                                        |
+| ------------------------ | ---------------------- | ---------------------------------------------- |
+| **Developer Laptop**     | `"DEV"` or `"STAGING"` | Local development against cloud infrastructure |
+| **Langfuse Cloud US**    | `"US"`                 | Production US region                           |
+| **Langfuse Cloud EU**    | `"EU"`                 | Production EU region                           |
+| **Langfuse Cloud HIPAA** | `"HIPAA"`              | HIPAA-compliant region                         |
+| **OSS Self-Hosted**      | `undefined` (not set)  | Self-hosted deployments don't have region      |
+
+**Use Cases:**
+
+```typescript
+// Check if running in cloud
+if (env.NEXT_PUBLIC_LANGFUSE_CLOUD_REGION) {
+  // Enable cloud-specific features
+  - Usage metering and billing
+  - Cloud spend alerts
+  - Free tier enforcement
+  - Stripe integration
+  - PostHog analytics
+}
+
+// Region-specific behavior
+if (env.NEXT_PUBLIC_LANGFUSE_CLOUD_REGION === "HIPAA") {
+  // HIPAA compliance features
+}
+
+// Development/staging checks
+if (env.NEXT_PUBLIC_LANGFUSE_CLOUD_REGION === "DEV") {
+  // Enable debug features
+}
+```
+
+**Example Configuration:**
+
+```bash
+# .env file on developer laptop
+NEXT_PUBLIC_LANGFUSE_CLOUD_REGION=DEV
+
+# Cloud US deployment
+NEXT_PUBLIC_LANGFUSE_CLOUD_REGION=US
+
+# Self-hosted OSS deployment
+# (variable not set)
+```
+
+### LANGFUSE_EE_LICENSE_KEY
+
+**Purpose:** Enables Enterprise Edition features in self-hosted deployments.
+
+**Type:** `string | undefined`
+
+**Where Used:**
+
+- **web/src/env.mjs** - Web app EE features
+- **ee/src/env.ts** - EE package
+
+**When Set:**
+
+| Deployment          | Value              | Features Enabled                                                 |
+| ------------------- | ------------------ | ---------------------------------------------------------------- |
+| **Langfuse Cloud**  | Not set            | Cloud features controlled by `NEXT_PUBLIC_LANGFUSE_CLOUD_REGION` |
+| **OSS Self-Hosted** | Not set            | Core open-source features only                                   |
+| **EE Self-Hosted**  | License key string | Enterprise features enabled                                      |
+
+**Enterprise Features Controlled:**
+
+When `LANGFUSE_EE_LICENSE_KEY` is set and valid:
+
+- SSO integrations (custom OIDC, SAML)
+- Advanced RBAC
+- Audit logging
+- Custom branding
+- SLA support
+- Advanced security features
+
+**Usage Pattern:**
+
+```typescript
+import { env } from "@/src/env.mjs";
+
+// Check if EE license is present
+if (env.LANGFUSE_EE_LICENSE_KEY) {
+  // Validate license
+  const isValidLicense = await validateEELicense(env.LANGFUSE_EE_LICENSE_KEY);
+
+  if (isValidLicense) {
+    // Enable EE features
+    enableCustomSSO();
+    enableAdvancedRBAC();
+  }
+}
+```
+
+**Example Configuration:**
+
+```bash
+# OSS self-hosted (no license)
+# LANGFUSE_EE_LICENSE_KEY not set
+
+# EE self-hosted
+LANGFUSE_EE_LICENSE_KEY=ee_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+
+# Langfuse Cloud (uses region instead)
+NEXT_PUBLIC_LANGFUSE_CLOUD_REGION=US
+# LANGFUSE_EE_LICENSE_KEY not used
+```
+
+### Other Important Variables
+
+**DOCKER_BUILD**
+
+```typescript
+// Skip validation during Docker builds
+skipValidation: process.env.DOCKER_BUILD === "1";
+```
+
+**Purpose:** Docker builds happen before runtime env vars are available, so validation must be skipped.
+
+**SALT**
+
+```typescript
+SALT: z.string({
+  required_error: "A strong Salt is required to encrypt API keys securely.",
+});
+```
+
+**Purpose:** Required for encrypting API keys in database. Must be set in production.
+
+**ENCRYPTION_KEY**
+
+```typescript
+ENCRYPTION_KEY: z.string().length(64, "Must be 256 bits, 64 hex characters");
+```
+
+**Purpose:** Optional 256-bit key for encrypting sensitive database fields.
+
+**Generate:** `openssl rand -hex 32`
+
+---
+
+## Best Practices
+
+### 1. Always Import from env.mjs/env.ts
+
+```typescript
+// ❌ NEVER DO THIS
+const dbUrl = process.env.DATABASE_URL;
+
+// ✅ ALWAYS DO THIS
+import { env } from "@/src/env.mjs";
+const dbUrl = env.DATABASE_URL; // Type-safe, validated
+```
+
+### 2. Use Appropriate Import Path
+
+```typescript
+// In web package
+import { env } from "@/src/env.mjs";
+
+// In worker package
+import { env } from "./env";
+
+// In shared package
+import { env } from "@langfuse/shared/src/env";
+```
+
+### 3. Client Variables Must Start with NEXT*PUBLIC*
+
+```typescript
+// ❌ Won't work in browser
+API_KEY: z.string(); // in server config
+
+// ✅ Accessible in browser
+NEXT_PUBLIC_API_KEY: z.string(); // in client config
+```
+
+### 4. Provide Sensible Defaults for Development
+
+```typescript
+PORT: z.coerce.number().positive().default(3030),
+NODE_ENV: z.enum(["development", "test", "production"]).default("development"),
+REDIS_PORT: z.coerce.number().positive().default(6379),
+```
+
+### 5. Use Coercion for Numbers
+
+```typescript
+// .env files are always strings
+PORT: z.coerce.number(); // Converts "3000" to 3000
+```
+
+### 6. Transform Complex Values
+
+```typescript
+// Split comma-separated values
+LANGFUSE_LOG_PROPAGATED_HEADERS: z.string().optional().transform((s) =>
+  s ? s.split(",").map((s) => s.toLowerCase().trim()) : []
+),
+
+// Parse project:rate pairs
+LANGFUSE_INGESTION_PROCESSING_SAMPLED_PROJECTS: z.string().optional().transform((val) => {
+  const map = new Map<string, number>();
+  val?.split(",").forEach(part => {
+    const [projectId, rate] = part.split(":");
+    map.set(projectId, parseFloat(rate));
+  });
+  return map;
+}),
+```
+
+### 7. Validation at Startup
+
+All environment variables are validated when the application starts. Invalid configuration will cause immediate failure with clear error messages:
+
+```bash
+❌ Validation error:
+  - SALT: Required
+  - CLICKHOUSE_URL: Invalid url
+  - PORT: Number must be less than or equal to 65536
+```
+
+### 8. Skip Validation in Docker Builds
+
+Always include the Docker build escape hatch:
+
+```typescript
+export const env =
+  process.env.DOCKER_BUILD === "1"
+    ? (process.env as any)
+    : EnvSchema.parse(removeEmptyEnvVariables(process.env));
+```
+
+### 9. Use removeEmptyEnvVariables Helper
+
+Treats empty strings as undefined:
+
+```typescript
+import { removeEmptyEnvVariables } from "@langfuse/shared";
+
+EnvSchema.parse(removeEmptyEnvVariables(process.env));
+```
+
+This prevents errors from `.env` files with empty values:
+
+```bash
+# .env
+OPTIONAL_VAR=    # Treated as undefined, not empty string
+```
+
+---
+
+## Configuration File Locations
+
+```
+langfuse/
+├── .env                          # Local development overrides
+├── .env.dev.example              # Example dev configuration
+├── web/src/env.mjs               # Web app env validation
+├── worker/src/env.ts             # Worker env validation
+├── packages/shared/src/env.ts    # Shared env validation
+└── ee/src/env.ts                 # EE env validation
+```
+
+**DO NOT commit:**
+
+- `.env`
+- `.env.local`
+- `.env.production`
+
+---
+
+**Related Files:**
+
+- [SKILL.md](../SKILL.md) - Main guide
+- [architecture-overview.md](architecture-overview.md) - Architecture patterns

.claude/skills/backend-dev-guidelines/resources/database-patterns.md

@@ -0,0 +1,660 @@
+# Database Patterns - PostgreSQL & ClickHouse
+
+Complete guide to database access patterns in Langfuse using PostgreSQL (Prisma ORM) and ClickHouse (direct client).
+
+## Table of Contents
+
+- [Database Architecture Overview](#database-architecture-overview)
+- [PostgreSQL with Prisma](#postgresql-with-prisma)
+- [ClickHouse with Direct Client](#clickhouse-with-direct-client)
+- [Repository Pattern](#repository-pattern)
+- [When to Use Which Database](#when-to-use-which-database)
+- [Error Handling](#error-handling)
+
+---
+
+## Database Architecture Overview
+
+Langfuse uses a **dual database architecture**:
+
+| Database       | Technology        | Purpose                                                       | Access Pattern                         |
+| -------------- | ----------------- | ------------------------------------------------------------- | -------------------------------------- |
+| **PostgreSQL** | Prisma ORM        | Transactional data, relational data, CRUD operations          | Type-safe ORM with migrations          |
+| **ClickHouse** | Direct SQL client | Analytics data, high-volume traces/observations, aggregations | Raw SQL queries with streaming support |
+| **Redis**      | ioredis           | Queues (BullMQ), caching, rate limiting                       | Direct client access                   |
+
+**Key Principle**: Use PostgreSQL for transactional data and relationships. Use ClickHouse for high-volume analytics and time-series data.
+
+**⚠️ Important**: All queries must filter by `project_id` (or `projectId`) to ensure proper data isolation between tenants. This is essential for the multi-tenant architecture.
+
+---
+
+## PostgreSQL with Prisma
+
+### Import Pattern
+
+```typescript
+import { prisma } from "@langfuse/shared/src/db";
+
+// Direct access to Prisma client
+const user = await prisma.user.findUnique({ where: { id } });
+```
+
+**Important**: Always import from `@langfuse/shared/src/db`, not `@prisma/client` directly.
+
+### Common CRUD Operations
+
+**⚠️ ALWAYS include `projectId` in WHERE clauses** for project-scoped data:
+
+```typescript
+// Create
+const project = await prisma.project.create({
+  data: {
+    name: "My Project",
+    orgId: organizationId,
+  },
+});
+
+// ✅ GOOD: Read with projectId filter
+const trace = await prisma.trace.findUnique({
+  where: { id: traceId, projectId },  // ← Always include projectId for tenant isolation
+  include: {
+    scores: true,
+    project: { select: { id: true, name: true } },
+  },
+});
+
+// ❌ BAD: Missing projectId filter
+// const trace = await prisma.trace.findUnique({
+//   where: { id: traceId },  // ← Missing projectId!
+// });
+
+// Update
+await prisma.user.update({
+  where: { id: userId },
+  data: { lastLogin: new Date() },
+});
+
+// ✅ GOOD: Delete with projectId
+await prisma.apiKey.delete({
+  where: { id: apiKeyId, projectId },  // ← Always include projectId
+});
+
+// ✅ GOOD: Count with projectId
+const traceCount = await prisma.trace.count({
+  where: { projectId, userId },  // ← Always include projectId
+});
+```
+
+### Transactions
+
+Use Prisma interactive transactions for operations that must be atomic:
+
+```typescript
+const result = await prisma.$transaction(async (tx) => {
+  const user = await tx.user.create({ data: userData });
+
+  const project = await tx.project.create({
+    data: {
+      name: "Default Project",
+      orgId: user.id,
+    },
+  });
+
+  await tx.projectMembership.create({
+    data: {
+      userId: user.id,
+      projectId: project.id,
+      role: "OWNER",
+    },
+  });
+
+  return { user, project };
+});
+```
+
+**Transaction options:**
+
+```typescript
+await prisma.$transaction(
+  async (tx) => {
+    // Transaction logic
+  },
+  {
+    maxWait: 5000, // Max time to wait for transaction to start (ms)
+    timeout: 10000, // Max time transaction can run (ms)
+  },
+);
+```
+
+### Query Optimization
+
+**Use `select` to limit fields:**
+
+```typescript
+// ❌ Fetches all fields (including large JSON columns)
+const traces = await prisma.trace.findMany({ where: { projectId } });
+
+// ✅ Only fetch needed fields
+const traces = await prisma.trace.findMany({
+  where: { projectId },
+  select: {
+    id: true,
+    name: true,
+    timestamp: true,
+    userId: true,
+  },
+});
+```
+
+**Prevent N+1 queries with `include`:**
+
+```typescript
+// ❌ N+1 Query Problem
+const projects = await prisma.project.findMany();
+for (const project of projects) {
+  // N additional queries
+  const memberCount = await prisma.projectMembership.count({
+    where: { projectId: project.id },
+  });
+}
+
+// ✅ Use include or aggregation
+const projects = await prisma.project.findMany({
+  include: {
+    members: { select: { userId: true, role: true } },
+  },
+});
+```
+
+**Pagination:**
+
+```typescript
+const PAGE_SIZE = 50;
+
+const traces = await prisma.trace.findMany({
+  where: { projectId },
+  orderBy: { timestamp: "desc" },
+  take: PAGE_SIZE,
+  skip: page * PAGE_SIZE,
+});
+```
+
+## ClickHouse with Direct Client
+
+### Import Pattern
+
+```typescript
+import { queryClickhouse } from "@langfuse/shared/src/server/repositories/clickhouse";
+import { clickhouseClient } from "@langfuse/shared/src/server/clickhouse/client";
+```
+
+### ClickHouse Client Singleton
+
+ClickHouse uses a singleton client manager that reuses connections:
+
+```typescript
+import { clickhouseClient } from "@langfuse/shared/src/server/clickhouse/client";
+
+// Get client (automatically reuses existing connection)
+const client = clickhouseClient();
+
+// For read-only queries (uses read replica if configured)
+const client = clickhouseClient(undefined, "ReadOnly");
+```
+
+### Query Patterns
+
+ClickHouse queries use **raw SQL** with parameterized queries. Parameters use `{paramName: Type}` syntax:
+
+**⚠️ Important**: All ClickHouse queries must include `project_id` filter to ensure proper tenant isolation.
+
+**Simple query:**
+
+```typescript
+import { queryClickhouse } from "@langfuse/shared/src/server/repositories/clickhouse";
+
+// ✅ GOOD: Always filter by project_id
+const rows = await queryClickhouse<{ id: string; name: string }>({
+  query: `
+    SELECT id, name, timestamp
+    FROM traces
+    WHERE project_id = {projectId: String}  -- ← REQUIRED: Always filter by project_id
+    AND timestamp >= {startTime: DateTime64(3)}
+    ORDER BY timestamp DESC
+    LIMIT {limit: UInt32}
+  `,
+  params: {
+    projectId,  // ← Required for tenant isolation
+    startTime: convertDateToClickhouseDateTime(startDate),
+    limit: 100,
+  },
+  tags: { feature: "tracing", type: "trace" },
+});
+
+// ❌ BAD: Missing project_id filter
+// const rows = await queryClickhouse({
+//   query: `SELECT * FROM traces WHERE timestamp >= {startTime: DateTime64(3)}`,
+//   params: { startTime },
+// });
+```
+
+**Streaming query (for large result sets):**
+
+```typescript
+import { queryClickhouseStream } from "@langfuse/shared/src/server/repositories/clickhouse";
+
+// Stream results to avoid loading all rows in memory
+for await (const row of queryClickhouseStream<ObservationRecordReadType>({
+  query: `
+    SELECT *
+    FROM observations
+    WHERE project_id = {projectId: String}
+    AND start_time >= {startTime: DateTime64(3)}
+  `,
+  params: { projectId, startTime },
+})) {
+  // Process row by row
+  await processObservation(row);
+}
+```
+
+**Upsert (insert) operation:**
+
+```typescript
+import { upsertClickhouse } from "@langfuse/shared/src/server/repositories/clickhouse";
+
+await upsertClickhouse({
+  table: "traces",
+  records: [
+    {
+      id: traceId,
+      project_id: projectId,
+      timestamp: new Date(),
+      name: "API Call",
+      user_id: userId,
+      // ... other fields
+    },
+  ],
+  eventBodyMapper: (record) => ({
+    // Transform record for event log
+    id: record.id,
+    name: record.name,
+    // ... other fields
+  }),
+  tags: { feature: "ingestion", type: "trace" },
+});
+```
+
+**DDL/Administrative commands:**
+
+```typescript
+import { commandClickhouse } from "@langfuse/shared/src/server/repositories/clickhouse";
+
+// Create table, alter schema, etc.
+await commandClickhouse({
+  query: `
+    ALTER TABLE traces
+    ADD COLUMN IF NOT EXISTS new_field String
+  `,
+  tags: { feature: "migration" },
+});
+```
+
+### ClickHouse Type Mapping
+
+| JavaScript Type | ClickHouse Param Type                                     |
+| --------------- | --------------------------------------------------------- |
+| `string`        | `String`                                                  |
+| `number`        | `UInt32`, `Int64`, `Float64`                              |
+| `Date`          | `DateTime64(3)` (use `convertDateToClickhouseDateTime()`) |
+| `boolean`       | `UInt8` (0 or 1)                                          |
+| `string[]`      | `Array(String)`                                           |
+
+**Date handling:**
+
+```typescript
+import { convertDateToClickhouseDateTime } from "@langfuse/shared/src/server/clickhouse/client";
+
+const params = {
+  startTime: convertDateToClickhouseDateTime(new Date()),
+};
+```
+
+### ClickHouse Query Best Practices
+
+**1. Always filter by `project_id` for tenant isolation:**
+
+```typescript
+// ✅ CORRECT: project_id filter is required
+const query = `
+  SELECT *
+  FROM traces
+  WHERE project_id = {projectId: String}  -- ← Required for tenant isolation
+  AND timestamp >= {startTime: DateTime64(3)}
+`;
+
+// ❌ WRONG: Missing project_id filter
+// const query = `
+//   SELECT * FROM traces WHERE timestamp >= {startTime: DateTime64(3)}
+// `;
+```
+
+**Why this is important:**
+- Langfuse is multi-tenant - each project's data must be isolated
+- The `project_id` filter ensures queries only access data from the intended tenant
+- All queries on project-scoped tables (traces, observations, scores, sessions, etc.) must filter by `project_id`
+
+**2. Use LIMIT BY for deduplication:**
+
+```typescript
+// Get latest version of each trace
+const query = `
+  SELECT *
+  FROM traces
+  WHERE project_id = {projectId: String}  -- ← Always include project_id
+  ORDER BY event_ts DESC
+  LIMIT 1 BY id, project_id
+`;
+```
+
+**3. Use time-based filtering for performance:**
+
+```typescript
+// Combine project_id filter with timestamp for optimal performance
+const query = `
+  SELECT *
+  FROM observations
+  WHERE project_id = {projectId: String}  -- ← Required for tenant isolation
+  AND start_time >= {startTime: DateTime64(3)}  -- ← Improves performance
+  AND start_time < {endTime: DateTime64(3)}
+`;
+```
+
+**4. Use CTEs for complex queries (still require `project_id`):**
+
+```typescript
+const query = `
+  WITH observations_agg AS (
+    SELECT
+      trace_id,
+      count() as observation_count,
+      sum(total_cost) as total_cost
+    FROM observations
+    WHERE project_id = {projectId: String}  -- ← Filter in CTE
+    GROUP BY trace_id
+  )
+  SELECT
+    t.id,
+    t.name,
+    o.observation_count,
+    o.total_cost
+  FROM traces t
+  LEFT JOIN observations_agg o ON t.id = o.trace_id
+  WHERE t.project_id = {projectId: String}  -- ← Filter in main query
+`;
+```
+
+**Note**: When using CTEs or subqueries, ensure `project_id` filter is applied at each level.
+
+**Error handling with retries:**
+
+ClickHouse queries automatically retry on network errors (socket hang up). Custom error handling for resource limits:
+
+```typescript
+import {
+  queryClickhouse,
+  ClickHouseResourceError,
+} from "@langfuse/shared/src/server/repositories/clickhouse";
+
+try {
+  const rows = await queryClickhouse({ query, params });
+} catch (error) {
+  if (error instanceof ClickHouseResourceError) {
+    // Memory limit, timeout, or overcommit error
+    throw new Error(ClickHouseResourceError.ERROR_ADVICE_MESSAGE);
+  }
+  throw error;
+}
+```
+
+---
+
+## Repository Pattern
+
+Langfuse uses repositories in `packages/shared/src/server/repositories/` for complex data access patterns.
+
+### When to Use Repositories
+
+✅ **Use repositories when:**
+
+- Complex ClickHouse queries with CTEs, aggregations, or joins
+- Query used in multiple places (DRY principle)
+- Need data transformation/converters (DB → domain models)
+- Building reusable query logic with filters
+
+❌ **Use direct Prisma/ClickHouse for:**
+
+- Simple CRUD operations
+- One-off queries
+- Prototyping (refactor to repository later)
+
+### Repository Examples
+
+**Trace repository (ClickHouse):**
+
+```typescript
+// packages/shared/src/server/repositories/traces.ts
+export const getTracesByIds = async (
+  projectId: string,
+  traceIds: string[],
+): Promise<TraceRecordReadType[]> => {
+  const rows = await queryClickhouse<TraceRecordReadType>({
+    query: `
+      SELECT *
+      FROM traces
+      WHERE project_id = {projectId: String}
+      AND id IN ({traceIds: Array(String)})
+      ORDER BY event_ts DESC
+      LIMIT 1 BY id, project_id
+    `,
+    params: { projectId, traceIds },
+    tags: { feature: "tracing", type: "trace" },
+  });
+
+  return rows.map(convertClickhouseToDomain);
+};
+```
+
+**Score repository (PostgreSQL + ClickHouse):**
+
+```typescript
+// Repositories can query both databases
+export const getScoresByTraceId = async (
+  projectId: string,
+  traceId: string,
+) => {
+  // Use ClickHouse for analytics
+  const clickhouseScores = await queryClickhouse<ScoreRecordReadType>({
+    query: `
+      SELECT *
+      FROM scores
+      WHERE project_id = {projectId: String}
+      AND trace_id = {traceId: String}
+    `,
+    params: { projectId, traceId },
+  });
+
+  // Use Prisma for config data
+  const scoreConfigs = await prisma.scoreConfig.findMany({
+    where: { projectId },
+  });
+
+  return enrichScoresWithConfigs(clickhouseScores, scoreConfigs);
+};
+```
+
+---
+
+## When to Use Which Database
+
+| Use Case                               | Database   | Reasoning                                  |
+| -------------------------------------- | ---------- | ------------------------------------------ |
+| User accounts, projects, API keys      | PostgreSQL | Transactional data with strong consistency |
+| Prompt management, dataset definitions | PostgreSQL | Configuration data with relations          |
+| Project settings, RBAC permissions     | PostgreSQL | Small, frequently updated data             |
+| Traces, observations, events           | ClickHouse | High-volume time-series data               |
+| Score aggregations, analytics queries  | ClickHouse | Fast aggregations over millions of rows    |
+| Usage metrics, cost calculations       | ClickHouse | Analytical queries with GROUP BY           |
+| Exports, large dataset queries         | ClickHouse | Streaming support for large result sets    |
+
+**Decision flow:**
+
+1. Is it high-volume time-series data? → **ClickHouse**
+2. Does it need aggregation over millions of rows? → **ClickHouse**
+3. Is it transactional data with relationships? → **PostgreSQL**
+4. Is it configuration or user data? → **PostgreSQL**
+5. Is it frequently updated? → **PostgreSQL**
+6. Is it append-only analytics data? → **ClickHouse**
+
+### Project-Scoped vs Global Tables
+
+**Project-scoped tables (MUST filter by `project_id`):**
+- `traces` - All trace queries require `project_id`
+- `observations` - All observation queries require `project_id`
+- `scores` - All score queries require `project_id`
+- `events` - All event queries require `project_id`
+- `dataset_run_items_rmt` - All dataset run queries require `project_id`
+
+**Global tables (no `project_id` filter needed):**
+- `users` - User management (use `id` for filtering)
+- `organizations` - Organization data (use `id` for filtering)
+- System configuration tables
+
+**Example of correct filtering:**
+
+```typescript
+// ✅ CORRECT: Project-scoped query
+const traces = await queryClickhouse({
+  query: `
+    SELECT * FROM traces
+    WHERE project_id = {projectId: String}
+    AND timestamp >= {startTime: DateTime64(3)}
+  `,
+  params: { projectId, startTime },
+});
+
+// ✅ CORRECT: Global table query (no project_id needed)
+const user = await prisma.user.findUnique({
+  where: { id: userId },
+});
+
+// ❌ WRONG: Project-scoped query without project_id filter
+// const traces = await queryClickhouse({
+//   query: `SELECT * FROM traces WHERE timestamp >= {startTime: DateTime64(3)}`,
+// });
+```
+
+---
+
+## Error Handling
+
+### PostgreSQL (Prisma) Errors
+
+```typescript
+import { Prisma } from "@prisma/client";
+import { prisma } from "@langfuse/shared/src/db";
+
+try {
+  await prisma.user.create({ data: userData });
+} catch (error) {
+  if (error instanceof Prisma.PrismaClientKnownRequestError) {
+    // Unique constraint violation
+    if (error.code === "P2002") {
+      const target = error.meta?.target as string[];
+      throw new ConflictError(`${target?.join(", ")} already exists`);
+    }
+
+    // Foreign key constraint
+    if (error.code === "P2003") {
+      throw new ValidationError("Invalid reference");
+    }
+
+    // Record not found
+    if (error.code === "P2025") {
+      throw new NotFoundError("Record not found");
+    }
+
+    // Record required to connect not found
+    if (error.code === "P2018") {
+      throw new ValidationError("Related record not found");
+    }
+  }
+
+  // Unknown error
+  logger.error("Prisma error", { error });
+  throw error;
+}
+```
+
+**Common Prisma error codes:**
+
+| Code     | Meaning                      | Typical Cause                         |
+| -------- | ---------------------------- | ------------------------------------- |
+| `P2002`  | Unique constraint violation  | Duplicate email, API key, etc.        |
+| `P2003`  | Foreign key constraint       | Referenced record doesn't exist       |
+| `P2025`  | Record not found             | Update/delete of non-existent record  |
+| `P2018`  | Required relation not found  | Connect to non-existent related record |
+
+### ClickHouse Errors
+
+```typescript
+import {
+  queryClickhouse,
+  ClickHouseResourceError,
+} from "@langfuse/shared/src/server/repositories/clickhouse";
+
+try {
+  const rows = await queryClickhouse({ query, params });
+} catch (error) {
+  // ClickHouse resource errors (memory limit, timeout, overcommit)
+  if (error instanceof ClickHouseResourceError) {
+    logger.warn("ClickHouse resource error", {
+      errorType: error.errorType, // "MEMORY_LIMIT" | "OVERCOMMIT" | "TIMEOUT"
+      message: error.message,
+    });
+
+    // User-friendly error message
+    throw new BadRequestError(ClickHouseResourceError.ERROR_ADVICE_MESSAGE);
+  }
+
+  // Network/connection errors are automatically retried
+  logger.error("ClickHouse error", { error });
+  throw error;
+}
+```
+
+**ClickHouse error types:**
+
+| Error Type      | Discriminator           | Meaning                      | Solution                                           |
+| --------------- | ----------------------- | ---------------------------- | -------------------------------------------------- |
+| `MEMORY_LIMIT`  | "memory limit exceeded" | Query used too much memory   | Use more specific filters or shorter time range    |
+| `OVERCOMMIT`    | "OvercommitTracker"     | Memory overcommit limit hit  | Reduce query complexity or result set size         |
+| `TIMEOUT`       | "Timeout", "timed out"  | Query took too long          | Add filters, reduce time range, or optimize query  |
+
+**ClickHouse retries:**
+
+ClickHouse queries automatically retry network errors (socket hang up) with exponential backoff. Configure retry behavior:
+
+```typescript
+// In packages/shared/src/env.ts
+LANGFUSE_CLICKHOUSE_QUERY_MAX_ATTEMPTS: z.coerce.number().positive().default(3)
+```
+
+---
+
+**Related Files:**
+
+- [SKILL.md](../SKILL.md) - Main backend development guidelines
+- [architecture-overview.md](architecture-overview.md) - System architecture
+- [configuration.md](configuration.md) - Environment variable configuration

.claude/skills/backend-dev-guidelines/resources/middleware-guide.md

@@ -0,0 +1,765 @@
+# Middleware Guide - tRPC & Public API Patterns
+
+Complete guide to middleware patterns in Langfuse's Next.js + tRPC architecture.
+
+## Table of Contents
+
+- [tRPC Middleware](#trpc-middleware)
+- [Public API Middleware](#public-api-middleware)
+- [Authentication Patterns](#authentication-patterns)
+- [Error Handling Middleware](#error-handling-middleware)
+- [OpenTelemetry Instrumentation](#opentelemetry-instrumentation)
+- [Composable Procedures](#composable-procedures)
+
+---
+
+## tRPC Middleware
+
+**File:** `web/src/server/api/trpc.ts`
+
+tRPC middleware in Langfuse is composable and type-safe. Each middleware enriches the context and provides guarantees to subsequent middleware.
+
+### Core tRPC Middlewares
+
+**1. Error Handling Middleware (`withErrorHandling`)**
+
+Intercepts all errors and transforms them into user-friendly tRPC errors:
+
+```typescript
+const withErrorHandling = t.middleware(async ({ ctx, next }) => {
+  const res = await next({ ctx });
+
+  if (!res.ok) {
+    if (res.error.cause instanceof ClickHouseResourceError) {
+      // Surface ClickHouse resource errors with advice message
+      res.error = new TRPCError({
+        code: "SERVICE_UNAVAILABLE",
+        message: ClickHouseResourceError.ERROR_ADVICE_MESSAGE,
+      });
+    } else {
+      // Transform 5xx errors to not expose internals
+      const { code, httpStatus } = resolveError(res.error);
+      const isSafeToExpose = httpStatus >= 400 && httpStatus < 500;
+
+      res.error = new TRPCError({
+        code,
+        cause: null, // do not expose stack traces
+        message: isSafeToExpose
+          ? res.error.message
+          : "Internal error. We have been notified and are working on it.",
+      });
+    }
+  }
+
+  return res;
+});
+```
+
+**2. OpenTelemetry Instrumentation (`withOtelInstrumentation`)**
+
+Propagates OpenTelemetry context with Langfuse-specific baggage:
+
+```typescript
+const withOtelInstrumentation = t.middleware(async (opts) => {
+  const actualInput = await opts.getRawInput();
+
+  const baggageCtx = contextWithLangfuseProps({
+    headers: opts.ctx.headers,
+    userId: opts.ctx.session?.user?.id,
+    projectId: (actualInput as Record<string, string>)?.projectId,
+  });
+
+  return opentelemetry.context.with(baggageCtx, () => opts.next());
+});
+```
+
+**3. Authentication Middleware (`enforceUserIsAuthed`)**
+
+Ensures user is logged in via NextAuth session:
+
+```typescript
+const enforceUserIsAuthed = t.middleware(({ ctx, next }) => {
+  if (!ctx.session || !ctx.session.user) {
+    throw new TRPCError({ code: "UNAUTHORIZED" });
+  }
+
+  return next({
+    ctx: {
+      // infers the `session` as non-nullable
+      session: { ...ctx.session, user: ctx.session.user },
+    },
+  });
+});
+```
+
+**4. Project Membership Middleware (`enforceUserIsAuthedAndProjectMember`)**
+
+Validates that the user is a member of the project specified in input:
+
+```typescript
+const enforceUserIsAuthedAndProjectMember = t.middleware(async (opts) => {
+  const { ctx, next } = opts;
+
+  if (!ctx.session || !ctx.session.user) {
+    throw new TRPCError({ code: "UNAUTHORIZED" });
+  }
+
+  const actualInput = await opts.getRawInput();
+  const parsedInput = inputProjectSchema.safeParse(actualInput);
+
+  if (!parsedInput.success) {
+    throw new TRPCError({
+      code: "BAD_REQUEST",
+      message: "Invalid input, projectId is required",
+    });
+  }
+
+  const projectId = parsedInput.data.projectId;
+  const sessionProject = ctx.session.user.organizations
+    .flatMap((org) => org.projects.map((project) => ({ ...project, organization: org })))
+    .find((project) => project.id === projectId);
+
+  if (!sessionProject) {
+    throw new TRPCError({
+      code: "UNAUTHORIZED",
+      message: "User is not a member of this project",
+    });
+  }
+
+  return next({
+    ctx: {
+      session: {
+        ...ctx.session,
+        user: ctx.session.user,
+        orgId: sessionProject.organization.id,
+        orgRole: sessionProject.organization.role,
+        projectId: projectId,
+        projectRole: sessionProject.role,
+      },
+    },
+  });
+});
+```
+
+**5. Organization Membership Middleware (`enforceIsAuthedAndOrgMember`)**
+
+Validates organization membership:
+
+```typescript
+const enforceIsAuthedAndOrgMember = t.middleware(async (opts) => {
+  const { ctx, next } = opts;
+
+  if (!ctx.session || !ctx.session.user) {
+    throw new TRPCError({ code: "UNAUTHORIZED" });
+  }
+
+  const actualInput = await opts.getRawInput();
+  const result = inputOrganizationSchema.safeParse(actualInput);
+
+  if (!result.success) {
+    throw new TRPCError({
+      code: "BAD_REQUEST",
+      message: "Invalid input, orgId is required",
+    });
+  }
+
+  const orgId = result.data.orgId;
+  const sessionOrg = ctx.session.user.organizations.find((org) => org.id === orgId);
+
+  if (!sessionOrg && ctx.session.user.admin !== true) {
+    throw new TRPCError({
+      code: "UNAUTHORIZED",
+      message: "User is not a member of this organization",
+    });
+  }
+
+  return next({
+    ctx: {
+      session: {
+        ...ctx.session,
+        user: ctx.session.user,
+        orgId: orgId,
+        orgRole: ctx.session.user.admin === true ? Role.OWNER : sessionOrg!.role,
+      },
+    },
+  });
+});
+```
+
+**6. Trace Access Middleware (`enforceTraceAccess`)**
+
+Special middleware for trace-level routes that supports public traces:
+
+```typescript
+const enforceTraceAccess = t.middleware(async (opts) => {
+  const { ctx, next } = opts;
+  const actualInput = await opts.getRawInput();
+  const result = inputTraceSchema.safeParse(actualInput);
+
+  if (!result.success) {
+    throw new TRPCError({ code: "BAD_REQUEST", message: "Invalid input" });
+  }
+
+  const trace = await getTraceById({
+    traceId: result.data.traceId,
+    projectId: result.data.projectId,
+    timestamp: result.data.timestamp ?? undefined,
+  });
+
+  if (!trace) {
+    throw new TRPCError({ code: "NOT_FOUND", message: "Trace not found" });
+  }
+
+  const sessionProject = ctx.session?.user?.organizations
+    .flatMap((org) => org.projects)
+    .find(({ id }) => id === result.data.projectId);
+
+  // Allow access if:
+  // 1. User is a project member
+  // 2. Trace is public
+  // 3. User is admin
+  if (!trace.public && !sessionProject && ctx.session?.user?.admin !== true) {
+    throw new TRPCError({
+      code: "UNAUTHORIZED",
+      message: "User is not a member of this project and this trace is not public",
+    });
+  }
+
+  return next({
+    ctx: {
+      session: { ...ctx.session, projectRole: sessionProject?.role },
+      trace: trace, // pass the trace to avoid refetching
+    },
+  });
+});
+```
+
+### tRPC Procedure Types
+
+Langfuse exports composed procedures with middleware chains:
+
+```typescript
+// 1. Public procedure (no auth required)
+export const publicProcedure = withOtelTracingProcedure.use(withErrorHandling);
+
+// 2. Authenticated procedure (NextAuth session required)
+export const authenticatedProcedure = withOtelTracingProcedure
+  .use(withErrorHandling)
+  .use(enforceUserIsAuthed);
+
+// 3. Project-scoped procedure (project membership required)
+export const protectedProjectProcedure = withOtelTracingProcedure
+  .use(withErrorHandling)
+  .use(enforceUserIsAuthedAndProjectMember);
+
+// 4. Organization-scoped procedure
+export const protectedOrganizationProcedure = withOtelTracingProcedure
+  .use(withErrorHandling)
+  .use(enforceIsAuthedAndOrgMember);
+
+// 5. Trace access procedure (public traces supported)
+export const protectedGetTraceProcedure = withOtelTracingProcedure
+  .use(withErrorHandling)
+  .use(enforceTraceAccess);
+
+// 6. Session access procedure
+export const protectedGetSessionProcedure = withOtelTracingProcedure
+  .use(withErrorHandling)
+  .use(enforceSessionAccess);
+
+// 7. Admin API key procedure (for admin operations)
+export const adminProcedure = withOtelTracingProcedure
+  .use(withErrorHandling)
+  .use(enforceAdminAuth);
+```
+
+---
+
+## Public API Middleware
+
+**Files:** `web/src/features/public-api/server/`
+
+### withMiddlewares Pattern
+
+Wraps all public API routes with CORS, error handling, and OpenTelemetry:
+
+```typescript
+export function withMiddlewares(handlers: Handlers) {
+  return async (req: NextApiRequest, res: NextApiResponse) => {
+    const ctx = contextWithLangfuseProps({ headers: req.headers });
+
+    return opentelemetry.context.with(ctx, async () => {
+      try {
+        // 1. CORS middleware
+        await runMiddleware(req, res, cors);
+
+        // 2. HTTP method routing
+        const method = req.method as HttpMethod;
+        if (!handlers[method]) throw new MethodNotAllowedError();
+
+        // 3. Execute handler
+        return await handlers[method](req, res);
+      } catch (error) {
+        // 4. Error handling
+        if (error instanceof BaseError) {
+          if (error.httpCode >= 500) traceException(error);
+
+          return res.status(error.httpCode).json({
+            message: error.message,
+            error: error.name,
+          });
+        }
+
+        if (error instanceof ClickHouseResourceError) {
+          return res.status(524).json({
+            message: ClickHouseResourceError.ERROR_ADVICE_MESSAGE,
+            error: "Request is taking too long to process.",
+          });
+        }
+
+        if (isZodError(error)) {
+          return res.status(400).json({
+            message: "Invalid request data",
+            error: error.issues,
+          });
+        }
+
+        traceException(error);
+        return res.status(500).json({
+          message: "Internal Server Error",
+          error: error instanceof Error ? error.message : "Unknown error",
+        });
+      }
+    });
+  };
+}
+```
+
+**Usage:**
+
+```typescript
+// web/src/pages/api/public/datasets/[datasetName]/items.ts
+export default withMiddlewares({
+  GET: getDatasetItemsHandler,
+  POST: createDatasetItemHandler,
+});
+```
+
+### createAuthedProjectAPIRoute Pattern
+
+Factory function for authenticated public API routes with:
+- Authentication (Basic auth or Admin API key)
+- Rate limiting
+- Input/output validation (Zod)
+- OpenTelemetry context
+
+```typescript
+export const createAuthedProjectAPIRoute = <TQuery, TBody, TResponse>(
+  routeConfig: RouteConfig<TQuery, TBody, TResponse>
+) => {
+  return async (req: NextApiRequest, res: NextApiResponse) => {
+    // 1. Authentication (verifyAuth)
+    const auth = await verifyAuth(req, routeConfig.isAdminApiKeyAuthAllowed || false);
+
+    // 2. Rate limiting
+    const rateLimitResponse = await RateLimitService.getInstance().rateLimitRequest(
+      auth.scope,
+      routeConfig.rateLimitResource || "public-api"
+    );
+
+    if (rateLimitResponse?.isRateLimited()) {
+      return rateLimitResponse.sendRestResponseIfLimited(res);
+    }
+
+    // 3. Input validation
+    const query = routeConfig.querySchema
+      ? routeConfig.querySchema.parse(req.query)
+      : {};
+    const body = routeConfig.bodySchema
+      ? routeConfig.bodySchema.parse(req.body)
+      : {};
+
+    // 4. Execute with OpenTelemetry context
+    const ctx = contextWithLangfuseProps({
+      headers: req.headers,
+      projectId: auth.scope.projectId,
+    });
+
+    return opentelemetry.context.with(ctx, async () => {
+      const response = await routeConfig.fn({ query, body, req, res, auth });
+
+      // 5. Response validation (dev only)
+      if (env.NODE_ENV === "development" && routeConfig.responseSchema) {
+        const parsingResult = routeConfig.responseSchema.safeParse(response);
+        if (!parsingResult.success) {
+          logger.error("Response validation failed:", parsingResult.error);
+        }
+      }
+
+      res.status(routeConfig.successStatusCode || 200).json(response);
+    });
+  };
+};
+```
+
+**Usage:**
+
+```typescript
+// web/src/pages/api/public/traces/[traceId].ts
+export default createAuthedProjectAPIRoute({
+  name: "Get Trace",
+  querySchema: GetTraceV1Query,
+  responseSchema: GetTraceV1Response,
+  fn: async ({ query, auth }) => {
+    const trace = await getTraceById({
+      traceId: query.traceId,
+      projectId: auth.scope.projectId,
+    });
+
+    return transformTraceToApiResponse(trace);
+  },
+});
+```
+
+---
+
+## Authentication Patterns
+
+### tRPC Authentication (NextAuth)
+
+tRPC uses NextAuth sessions stored in JWT cookies:
+
+```typescript
+// Context creation with session
+export const createTRPCContext = async (opts: CreateNextContextOptions) => {
+  const { req, res } = opts;
+  const session = await getServerAuthSession({ req, res });
+
+  addUserToSpan({
+    userId: session?.user?.id,
+    email: session?.user?.email ?? undefined,
+  });
+
+  return {
+    session,
+    headers: req.headers,
+    prisma,
+    DB,
+  };
+};
+```
+
+**Session types:**
+
+```typescript
+// Base authenticated context
+export type AuthedContext = {
+  session: { user: NonNullable<Session["user"]> };
+};
+
+// Project-scoped context
+export type ProjectAuthedContext = {
+  session: AuthedContext["session"] & {
+    orgId: string;
+    orgRole: Role;
+    projectId: string;
+    projectRole: Role;
+  };
+};
+```
+
+### Public API Authentication
+
+Public APIs use **Basic Auth** with API keys:
+
+```typescript
+async function verifyBasicAuth(authHeader: string | undefined) {
+  const regularAuth = await new ApiAuthService(prisma, redis)
+    .verifyAuthHeaderAndReturnScope(authHeader);
+
+  if (!regularAuth.validKey) {
+    throw { status: 401, message: regularAuth.error };
+  }
+
+  if (regularAuth.scope.accessLevel !== "project") {
+    throw { status: 401, message: "Access denied - need basic auth with secret key" };
+  }
+
+  return regularAuth;
+}
+```
+
+**Admin API Key Authentication** (self-hosted only):
+
+```typescript
+async function verifyAdminApiKeyAuth(req: NextApiRequest) {
+  // Requires:
+  // 1. Authorization: Bearer <ADMIN_API_KEY>
+  // 2. x-langfuse-admin-api-key: <ADMIN_API_KEY>
+  // 3. x-langfuse-project-id: <project-id>
+
+  if (env.NEXT_PUBLIC_LANGFUSE_CLOUD_REGION) {
+    throw { status: 403, message: "Admin API key auth not available on Langfuse Cloud" };
+  }
+
+  const adminApiKey = env.ADMIN_API_KEY;
+  const bearerToken = req.headers.authorization?.replace("Bearer ", "");
+  const adminApiKeyHeader = req.headers["x-langfuse-admin-api-key"];
+
+  // Timing-safe comparison
+  const isValid =
+    crypto.timingSafeEqual(Buffer.from(bearerToken), Buffer.from(adminApiKey)) &&
+    crypto.timingSafeEqual(Buffer.from(adminApiKeyHeader), Buffer.from(adminApiKey));
+
+  if (!isValid) throw { status: 401, message: "Invalid admin API key" };
+
+  const projectId = req.headers["x-langfuse-project-id"];
+  const project = await prisma.project.findUnique({ where: { id: projectId } });
+
+  if (!project) throw { status: 404, message: "Project not found" };
+
+  return { validKey: true, scope: { projectId, accessLevel: "project" } };
+}
+```
+
+---
+
+## Error Handling Middleware
+
+### tRPC Error Transformation
+
+All tRPC errors go through `withErrorHandling` middleware:
+
+**Error types handled:**
+
+1. **ClickHouseResourceError** → `SERVICE_UNAVAILABLE` (524)
+2. **BaseError** → Preserves httpCode and message
+3. **5xx errors** → Sanitized as "Internal error" (hides stack traces)
+4. **4xx errors** → Original error message preserved
+
+**Example:**
+
+```typescript
+if (!res.ok) {
+  if (res.error.cause instanceof ClickHouseResourceError) {
+    res.error = new TRPCError({
+      code: "SERVICE_UNAVAILABLE",
+      message: ClickHouseResourceError.ERROR_ADVICE_MESSAGE,
+    });
+  } else {
+    const { code, httpStatus } = resolveError(res.error);
+    const isSafeToExpose = httpStatus >= 400 && httpStatus < 500;
+
+    res.error = new TRPCError({
+      code,
+      cause: null,
+      message: isSafeToExpose ? res.error.message : "Internal error.",
+    });
+  }
+}
+```
+
+### Public API Error Handling
+
+Public API uses `withMiddlewares` for error handling:
+
+```typescript
+catch (error) {
+  // 1. BaseError (custom application errors)
+  if (error instanceof BaseError) {
+    if (error.httpCode >= 500) traceException(error);
+    return res.status(error.httpCode).json({
+      message: error.message,
+      error: error.name,
+    });
+  }
+
+  // 2. ClickHouseResourceError (query timeouts, memory limits)
+  if (error instanceof ClickHouseResourceError) {
+    return res.status(524).json({
+      message: ClickHouseResourceError.ERROR_ADVICE_MESSAGE,
+      error: "Request is taking too long to process.",
+    });
+  }
+
+  // 3. Zod validation errors
+  if (isZodError(error)) {
+    return res.status(400).json({
+      message: "Invalid request data",
+      error: error.issues,
+    });
+  }
+
+  // 4. Prisma errors
+  if (isPrismaException(error)) {
+    traceException(error);
+    return res.status(500).json({
+      message: "Internal Server Error",
+      error: "An unknown error occurred",
+    });
+  }
+
+  // 5. Unknown errors
+  traceException(error);
+  return res.status(500).json({
+    message: "Internal Server Error",
+    error: error instanceof Error ? error.message : "Unknown error",
+  });
+}
+```
+
+---
+
+## OpenTelemetry Instrumentation
+
+All requests (tRPC and public API) propagate OpenTelemetry context with Langfuse-specific baggage.
+
+### Context Propagation Pattern
+
+```typescript
+import { contextWithLangfuseProps } from "@langfuse/shared/src/server";
+import * as opentelemetry from "@opentelemetry/api";
+
+// Create context with Langfuse baggage
+const ctx = contextWithLangfuseProps({
+  headers: req.headers,
+  userId: session?.user?.id,
+  projectId: input?.projectId,
+});
+
+// Execute with context
+return opentelemetry.context.with(ctx, async () => {
+  // All instrumented code inside here will have access to baggage
+  return await handler();
+});
+```
+
+**Baggage includes:**
+- `userId` - User ID from session
+- `projectId` - Project ID from input
+- `headers` - Request headers for trace propagation
+
+### tRPC Instrumentation
+
+```typescript
+const withOtelInstrumentation = t.middleware(async (opts) => {
+  const actualInput = await opts.getRawInput();
+
+  const baggageCtx = contextWithLangfuseProps({
+    headers: opts.ctx.headers,
+    userId: opts.ctx.session?.user?.id,
+    projectId: (actualInput as Record<string, string>)?.projectId,
+  });
+
+  return opentelemetry.context.with(baggageCtx, () => opts.next());
+});
+
+// Used with Baselime tracing
+const withOtelTracingProcedure = t.procedure
+  .use(withOtelInstrumentation)
+  .use(tracing({ collectInput: true, collectResult: true }));
+```
+
+---
+
+## Composable Procedures
+
+tRPC procedures are composed by chaining middleware:
+
+### Composition Pattern
+
+```typescript
+// Base procedure with tracing + error handling
+const baseProcedure = withOtelTracingProcedure.use(withErrorHandling);
+
+// Add authentication
+const authedProcedure = baseProcedure.use(enforceUserIsAuthed);
+
+// Add project scoping
+const projectProcedure = authedProcedure.use(enforceUserIsAuthedAndProjectMember);
+```
+
+### Using Procedures in Routers
+
+```typescript
+import { protectedProjectProcedure } from "@/src/server/api/trpc";
+
+export const tracesRouter = createTRPCRouter({
+  // Input automatically validated against Zod schema
+  all: protectedProjectProcedure
+    .input(
+      z.object({
+        projectId: z.string(),
+        page: z.number().optional(),
+        limit: z.number().optional(),
+      })
+    )
+    .query(async ({ input, ctx }) => {
+      // ctx.session.projectId is guaranteed to exist
+      // ctx.session.projectRole contains user's role
+
+      const traces = await getTraces({
+        projectId: input.projectId,
+        page: input.page ?? 0,
+        limit: input.limit ?? 50,
+      });
+
+      return traces;
+    }),
+
+  byId: protectedGetTraceProcedure
+    .input(
+      z.object({
+        traceId: z.string(),
+        projectId: z.string(),
+        timestamp: z.date().nullish(),
+      })
+    )
+    .query(async ({ input, ctx }) => {
+      // ctx.trace is guaranteed to exist (fetched by middleware)
+      // No need to refetch
+      return ctx.trace;
+    }),
+});
+```
+
+### Middleware Execution Order
+
+Middleware executes in the order it's chained:
+
+```typescript
+protectedProjectProcedure
+  .use(withErrorHandling)              // 1. Wraps entire execution
+  .use(enforceUserIsAuthed)            // 2. Validates session exists
+  .use(enforceUserIsAuthedAndProjectMember)  // 3. Validates project membership
+  .input(schema)                       // 4. Validates input
+  .query(async ({ input, ctx }) => {   // 5. Executes query
+    // ...
+  });
+```
+
+**Context enrichment:**
+
+Each middleware can enrich the context:
+
+```typescript
+// After enforceUserIsAuthed:
+ctx.session.user // NonNullable<User>
+
+// After enforceUserIsAuthedAndProjectMember:
+ctx.session.projectId   // string
+ctx.session.projectRole // Role (OWNER | ADMIN | MEMBER | VIEWER)
+ctx.session.orgId       // string
+ctx.session.orgRole     // Role
+
+// After enforceTraceAccess:
+ctx.trace // TraceRecord (pre-fetched)
+```
+
+---
+
+**Related Files:**
+
+- [SKILL.md](../SKILL.md) - Main backend development guidelines
+- [architecture-overview.md](architecture-overview.md) - System architecture
+- [async-and-errors.md](async-and-errors.md) - Error handling patterns

.claude/skills/backend-dev-guidelines/resources/routing-and-controllers.md

@@ -0,0 +1,844 @@
+# Routing Patterns - Next.js & tRPC
+
+Complete guide to routing and separation of concerns in Langfuse's Next.js + tRPC architecture.
+
+## Table of Contents
+
+- [Architecture Overview](#architecture-overview)
+- [tRPC Routers](#trpc-routers)
+- [Public REST API Routes](#public-rest-api-routes)
+- [Service Layer](#service-layer)
+- [Repository Layer](#repository-layer)
+- [Separation of Concerns](#separation-of-concerns)
+- [Anti-Patterns](#anti-patterns)
+
+---
+
+## Architecture Overview
+
+Langfuse uses a **layered architecture** with clear separation of concerns:
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                        ENTRY POINTS                          │
+│  ┌──────────────────────┐    ┌─────────────────────────┐   │
+│  │   tRPC Procedures    │    │  Public REST API Routes │   │
+│  │  (Internal UI API)   │    │   (SDK/External API)    │   │
+│  └──────────────────────┘    └─────────────────────────┘   │
+└─────────────────────────────────────────────────────────────┘
+                              ▼
+┌─────────────────────────────────────────────────────────────┐
+│                       SERVICE LAYER                          │
+│         Business logic, orchestration, validation            │
+│   web/src/features/*/server/ or packages/shared/services/   │
+└─────────────────────────────────────────────────────────────┘
+                              ▼
+┌─────────────────────────────────────────────────────────────┐
+│                     REPOSITORY LAYER                         │
+│         Complex queries, data transformation                 │
+│         packages/shared/src/server/repositories/             │
+└─────────────────────────────────────────────────────────────┘
+                              ▼
+┌─────────────────────────────────────────────────────────────┐
+│                      DATABASE LAYER                          │
+│       PostgreSQL (Prisma) + ClickHouse (Direct Client)      │
+└─────────────────────────────────────────────────────────────┘
+```
+
+### Key Principles
+
+**Entry Points (Routes/Procedures):**
+- ✅ Define routing and procedure signatures
+- ✅ Handle authentication/authorization (via middleware)
+- ✅ Validate input (Zod schemas)
+- ✅ Delegate to services
+- ✅ Return responses
+
+**Entry Points should NEVER:**
+- ❌ Contain business logic
+- ❌ Access database directly
+- ❌ Perform complex data transformations
+- ❌ Make direct repository calls (use services)
+
+**Services:**
+- ✅ Contain business logic
+- ✅ Orchestrate multiple operations
+- ✅ Call repositories or Prisma/ClickHouse
+- ✅ Handle complex workflows
+- ❌ Should NOT know about HTTP, tRPC, or request/response objects
+
+**Repositories:**
+- ✅ Complex database queries
+- ✅ Data transformation (DB → domain models)
+- ✅ ClickHouse query builders
+- ✅ Reusable query logic
+- ❌ Should NOT contain business logic
+
+---
+
+## tRPC Routers
+
+**Location:** `web/src/server/api/routers/`
+
+tRPC routers define type-safe procedures for the internal UI. Each router groups related operations.
+
+### Router Structure
+
+**File:** `web/src/server/api/routers/scores.ts`
+
+```typescript
+import { z } from "zod/v4";
+import { createTRPCRouter, protectedProjectProcedure } from "@/src/server/api/trpc";
+import { paginationZod, singleFilter, orderBy } from "@langfuse/shared";
+import {
+  getScoresUiTable,
+  getScoresUiCount,
+  upsertScore,
+} from "@langfuse/shared/src/server";
+
+const ScoreAllOptions = z.object({
+  projectId: z.string(),
+  filter: z.array(singleFilter),
+  orderBy: orderBy,
+  ...paginationZod,
+});
+
+export const scoresRouter = createTRPCRouter({
+  /**
+   * Get all scores for a project
+   */
+  all: protectedProjectProcedure
+    .input(ScoreAllOptions)
+    .query(async ({ input, ctx }) => {
+      // Delegate to repository for data fetching
+      const clickhouseScoreData = await getScoresUiTable({
+        projectId: input.projectId,
+        filter: input.filter ?? [],
+        orderBy: input.orderBy,
+        limit: input.limit,
+        offset: input.page * input.limit,
+      });
+
+      // Delegate to Prisma for related data
+      const [jobExecutions, users] = await Promise.all([
+        ctx.prisma.jobExecution.findMany({
+          where: {
+            jobOutputScoreId: {
+              in: clickhouseScoreData.map((score) => score.id),
+            },
+          },
+        }),
+        ctx.prisma.user.findMany({
+          where: {
+            id: {
+              in: clickhouseScoreData
+                .map((s) => s.authorUserId)
+                .filter((id): id is string => id !== null),
+            },
+          },
+        }),
+      ]);
+
+      // Transform and combine data
+      return clickhouseScoreData.map((score) => ({
+        ...score,
+        jobConfigurationId:
+          jobExecutions.find((j) => j.jobOutputScoreId === score.id)
+            ?.jobConfigurationId ?? null,
+        authorUserImage:
+          users.find((u) => u.id === score.authorUserId)?.image ?? null,
+        authorUserName:
+          users.find((u) => u.id === score.authorUserId)?.name ?? null,
+      }));
+    }),
+
+  /**
+   * Create or update score
+   */
+  createAnnotationScore: protectedProjectProcedure
+    .input(CreateAnnotationScoreData)
+    .mutation(async ({ input, ctx }) => {
+      // Validation
+      validateConfigAgainstBody(input);
+
+      // Delegate to repository
+      await upsertScore({
+        id: input.id ?? randomUUID(),
+        traceId: input.traceId,
+        projectId: input.projectId,
+        name: input.name,
+        value: input.value,
+        source: ScoreSource.ANNOTATION,
+        authorUserId: ctx.session.user.id,
+        comment: input.comment,
+      });
+
+      // Audit log
+      await auditLog({
+        session: ctx.session,
+        resourceType: "score",
+        resourceId: input.id,
+        action: "create",
+      });
+
+      return { success: true };
+    }),
+});
+```
+
+**Key Points:**
+- Use appropriate procedure type (`protectedProjectProcedure`, `authenticatedProcedure`, etc.)
+- Define input schema with Zod (`.input()`)
+- Use `.query()` for reads, `.mutation()` for writes
+- Delegate to services/repositories for data access
+- Keep procedures thin - no business logic
+- Type-safe throughout (TypeScript infers types from Zod schemas)
+
+### Registering Routers
+
+**File:** `web/src/server/api/root.ts`
+
+```typescript
+import { createTRPCRouter } from "@/src/server/api/trpc";
+import { scoresRouter } from "./routers/scores";
+import { tracesRouter } from "./routers/traces";
+import { dashboardRouter } from "@/src/features/dashboard/server/dashboard-router";
+
+export const appRouter = createTRPCRouter({
+  scores: scoresRouter,
+  traces: tracesRouter,
+  dashboard: dashboardRouter,
+  // ... other routers
+});
+
+export type AppRouter = typeof appRouter;
+```
+
+**Calling from frontend:**
+
+```typescript
+// Type-safe client call
+const { data, isLoading } = api.scores.all.useQuery({
+  projectId: "proj_123",
+  page: 0,
+  limit: 50,
+  filter: [],
+  orderBy: null,
+});
+```
+
+---
+
+## Public REST API Routes
+
+**Location:** `web/src/pages/api/public/`
+
+Public API routes use **Next.js file-based routing** and provide REST endpoints for SDKs and external integrations.
+
+### File-based Routing
+
+Next.js uses file system for routing:
+
+```
+web/src/pages/api/public/
+├── scores/
+│   ├── index.ts          → GET/POST /api/public/scores
+│   └── [scoreId].ts      → GET/PATCH/DELETE /api/public/scores/:scoreId
+├── traces/
+│   ├── index.ts          → GET /api/public/traces
+│   └── [traceId].ts      → GET /api/public/traces/:traceId
+└── datasets/
+    └── [name]/
+        ├── index.ts      → GET/POST /api/public/datasets/:name
+        └── items/
+            └── index.ts  → GET /api/public/datasets/:name/items
+```
+
+**Dynamic routes:**
+- `[param].ts` → Single dynamic segment (e.g., `/api/public/scores/[scoreId].ts`)
+- `[...param].ts` → Catch-all route (e.g., `/api/public/[...path].ts`)
+
+### REST API Pattern
+
+**File:** `web/src/pages/api/public/scores/index.ts`
+
+```typescript
+import { v4 } from "uuid";
+import { createAuthedProjectAPIRoute } from "@/src/features/public-api/server/createAuthedProjectAPIRoute";
+import { withMiddlewares } from "@/src/features/public-api/server/withMiddlewares";
+import {
+  GetScoresQueryV1,
+  GetScoresResponseV1,
+  PostScoresBodyV1,
+  PostScoresResponseV1,
+} from "@langfuse/shared";
+import { eventTypes, processEventBatch } from "@langfuse/shared/src/server";
+import { ScoresApiService } from "@/src/features/public-api/server/scores-api-service";
+
+export default withMiddlewares({
+  // POST /api/public/scores
+  POST: createAuthedProjectAPIRoute({
+    name: "Create Score",
+    bodySchema: PostScoresBodyV1,
+    responseSchema: PostScoresResponseV1,
+    fn: async ({ body, auth, res }) => {
+      const event = {
+        id: v4(),
+        type: eventTypes.SCORE_CREATE,
+        timestamp: new Date().toISOString(),
+        body,
+      };
+
+      if (!event.body.id) {
+        event.body.id = v4();
+      }
+
+      const result = await processEventBatch([event], auth);
+
+      if (result.errors.length > 0) {
+        const error = result.errors[0];
+        res.status(error.status).json({
+          message: error.error ?? error.message,
+        });
+        return { id: "" };
+      }
+
+      return { id: event.body.id };
+    },
+  }),
+
+  // GET /api/public/scores
+  GET: createAuthedProjectAPIRoute({
+    name: "Get Scores",
+    querySchema: GetScoresQueryV1,
+    responseSchema: GetScoresResponseV1,
+    fn: async ({ query, auth }) => {
+      const scoresApiService = new ScoresApiService("v1");
+
+      const [items, count] = await Promise.all([
+        scoresApiService.generateScoresForPublicApi({
+          projectId: auth.scope.projectId,
+          page: query.page,
+          limit: query.limit,
+          userId: query.userId,
+          name: query.name,
+        }),
+        scoresApiService.getScoresCountForPublicApi({
+          projectId: auth.scope.projectId,
+          userId: query.userId,
+          name: query.name,
+        }),
+      ]);
+
+      return {
+        data: items,
+        meta: {
+          page: query.page,
+          limit: query.limit,
+          totalItems: count,
+          totalPages: Math.ceil(count / query.limit),
+        },
+      };
+    },
+  }),
+});
+```
+
+**Key Points:**
+- Use `withMiddlewares` for all public API routes (provides CORS, error handling, OpenTelemetry)
+- Use `createAuthedProjectAPIRoute` for authenticated endpoints (handles auth, rate limiting, validation)
+- Define separate handlers for each HTTP method
+- Input/output validated with Zod schemas
+- Delegate to services for business logic
+
+### Simple Public Routes
+
+For routes that don't need authentication:
+
+```typescript
+// web/src/pages/api/public/health.ts
+import { withMiddlewares } from "@/src/features/public-api/server/withMiddlewares";
+
+export default withMiddlewares({
+  GET: async (req, res) => {
+    res.status(200).json({ status: "ok" });
+  },
+});
+```
+
+---
+
+## Service Layer
+
+**Location:** `web/src/features/*/server/` or `packages/shared/src/server/services/`
+
+Services contain business logic and orchestrate operations. They're called by tRPC procedures and API routes.
+
+### Service Pattern
+
+**File:** `web/src/features/public-api/server/scores-api-service.ts`
+
+```typescript
+import {
+  _handleGenerateScoresForPublicApi,
+  _handleGetScoresCountForPublicApi,
+  type ScoreQueryType,
+} from "@/src/features/public-api/server/scores";
+import { _handleGetScoreById } from "@langfuse/shared/src/server";
+
+export class ScoresApiService {
+  constructor(private readonly apiVersion: "v1" | "v2") {}
+
+  /**
+   * Get a specific score by ID
+   */
+  async getScoreById({
+    projectId,
+    scoreId,
+    source,
+  }: {
+    projectId: string;
+    scoreId: string;
+    source?: ScoreSourceType;
+  }) {
+    return _handleGetScoreById({
+      projectId,
+      scoreId,
+      source,
+      scoreScope: this.apiVersion === "v1" ? "traces_only" : "all",
+      preferredClickhouseService: "ReadOnly",
+    });
+  }
+
+  /**
+   * Get list of scores with version-aware filtering
+   */
+  async generateScoresForPublicApi(props: ScoreQueryType) {
+    return _handleGenerateScoresForPublicApi({
+      props,
+      scoreScope: this.apiVersion === "v1" ? "traces_only" : "all",
+    });
+  }
+
+  /**
+   * Get count of scores with version-aware filtering
+   */
+  async getScoresCountForPublicApi(props: ScoreQueryType) {
+    return _handleGetScoresCountForPublicApi({
+      props,
+      scoreScope: this.apiVersion === "v1" ? "traces_only" : "all",
+    });
+  }
+}
+```
+
+**Key Points:**
+- Services contain business logic, not routing logic
+- Services should NOT import tRPC or Next.js types
+- Services can call repositories, Prisma, ClickHouse directly
+- Services orchestrate multiple operations
+- Services are reusable across tRPC and public API
+
+### Where to Put Services
+
+**Feature-specific services:**
+```
+web/src/features/
+├── datasets/
+│   └── server/
+│       └── dataset-service.ts
+├── evals/
+│   └── server/
+│       └── eval-service.ts
+└── public-api/
+    └── server/
+        └── scores-api-service.ts
+```
+
+**Shared services:**
+```
+packages/shared/src/server/services/
+├── SlackService.ts
+├── DashboardService/
+├── StorageService.ts
+└── DefaultEvaluationModelService/
+```
+
+---
+
+## Repository Layer
+
+**Location:** `packages/shared/src/server/repositories/`
+
+Repositories handle complex database queries, data transformation, and provide reusable query logic.
+
+### Repository Structure
+
+```
+packages/shared/src/server/repositories/
+├── traces.ts              # Trace queries (ClickHouse)
+├── observations.ts        # Observation queries (ClickHouse)
+├── scores.ts              # Score queries (ClickHouse)
+├── clickhouse.ts          # Core ClickHouse helpers
+└── definitions.ts         # Type definitions
+```
+
+### Repository Pattern
+
+**File:** `packages/shared/src/server/repositories/traces.ts`
+
+```typescript
+import { queryClickhouse, upsertClickhouse } from "./clickhouse";
+import { TraceRecordReadType } from "./definitions";
+import { convertClickhouseToDomain } from "./traces_converters";
+
+/**
+ * Get traces by IDs
+ */
+export const getTracesByIds = async (
+  projectId: string,
+  traceIds: string[]
+): Promise<TraceRecordReadType[]> => {
+  const rows = await queryClickhouse<TraceRecordReadType>({
+    query: `
+      SELECT *
+      FROM traces
+      WHERE project_id = {projectId: String}
+      AND id IN ({traceIds: Array(String)})
+      ORDER BY event_ts DESC
+      LIMIT 1 BY id, project_id
+    `,
+    params: { projectId, traceIds },
+    tags: { feature: "tracing", type: "trace" },
+  });
+
+  return rows.map(convertClickhouseToDomain);
+};
+
+/**
+ * Upsert trace to ClickHouse
+ */
+export const upsertTrace = async (
+  trace: TraceRecordInsertType
+): Promise<void> => {
+  await upsertClickhouse({
+    table: "traces",
+    records: [trace],
+    eventBodyMapper: (body) => ({
+      id: body.id,
+      name: body.name,
+      user_id: body.user_id,
+      // ... map fields
+    }),
+    tags: { feature: "ingestion", type: "trace" },
+  });
+};
+```
+
+**Key Points:**
+- Use `queryClickhouse` for SELECT queries
+- Use `upsertClickhouse` for INSERT/UPDATE
+- Use `commandClickhouse` for DDL (ALTER TABLE, etc.)
+- Include data converters (`convertClickhouseToDomain`)
+- Add OpenTelemetry tags for observability
+- Repositories should NOT contain business logic
+
+### When to Use Repositories
+
+✅ **Use repositories for:**
+- Complex ClickHouse queries with CTEs, joins, aggregations
+- Queries used in multiple places (DRY principle)
+- Data transformation from DB types to domain models
+- Streaming large result sets
+
+❌ **Use direct Prisma/ClickHouse for:**
+- Simple CRUD operations
+- One-off queries
+- Prototyping (can refactor to repository later)
+
+---
+
+## Separation of Concerns
+
+### ✅ Good Example: Proper Layering
+
+**tRPC Procedure (Entry Point):**
+
+```typescript
+// web/src/server/api/routers/scores.ts
+export const scoresRouter = createTRPCRouter({
+  all: protectedProjectProcedure
+    .input(ScoreFilterOptions)
+    .query(async ({ input }) => {
+      // ✅ Thin procedure - delegates to repository
+      return await getScoresUiTable({
+        projectId: input.projectId,
+        filter: input.filter,
+        orderBy: input.orderBy,
+      });
+    }),
+
+  create: protectedProjectProcedure
+    .input(CreateScoreInput)
+    .mutation(async ({ input, ctx }) => {
+      // ✅ Delegates to service for orchestration
+      return await createScoreWithValidation({
+        scoreData: input,
+        userId: ctx.session.user.id,
+        projectId: ctx.session.projectId,
+      });
+    }),
+});
+```
+
+**Service (Business Logic):**
+
+```typescript
+// web/src/features/scores/server/score-service.ts
+export async function createScoreWithValidation({
+  scoreData,
+  userId,
+  projectId,
+}: {
+  scoreData: CreateScoreInput;
+  userId: string;
+  projectId: string;
+}) {
+  // ✅ Business logic: validation
+  const config = await prisma.scoreConfig.findUnique({
+    where: { id: scoreData.configId },
+  });
+
+  if (!config) {
+    throw new LangfuseNotFoundError("Score config not found");
+  }
+
+  validateConfigAgainstBody(config, scoreData);
+
+  // ✅ Business logic: orchestration
+  const scoreId = randomUUID();
+
+  await Promise.all([
+    // Create score in ClickHouse
+    upsertScore({
+      id: scoreId,
+      projectId,
+      traceId: scoreData.traceId,
+      name: scoreData.name,
+      value: scoreData.value,
+      authorUserId: userId,
+    }),
+    // Audit log in PostgreSQL
+    auditLog({
+      userId,
+      resourceType: "score",
+      resourceId: scoreId,
+      action: "create",
+    }),
+  ]);
+
+  return { id: scoreId };
+}
+```
+
+**Repository (Data Access):**
+
+```typescript
+// packages/shared/src/server/repositories/scores.ts
+export const upsertScore = async (
+  score: ScoreInsertType
+): Promise<void> => {
+  // ✅ Pure data access - no business logic
+  await upsertClickhouse({
+    table: "scores",
+    records: [score],
+    eventBodyMapper: (body) => ({
+      id: body.id,
+      trace_id: body.traceId,
+      name: body.name,
+      value: body.value,
+      author_user_id: body.authorUserId,
+    }),
+    tags: { feature: "scoring" },
+  });
+};
+```
+
+### Why This Works
+
+1. **tRPC Procedure**: Thin, delegates to service
+2. **Service**: Contains all business logic (validation, orchestration)
+3. **Repository**: Pure data access, reusable
+4. **Service is protocol-agnostic**: Can be called from tRPC, public API, or worker
+5. **Clear separation**: Easy to test, maintain, extend
+
+---
+
+## Anti-Patterns
+
+### ❌ Anti-Pattern 1: Business Logic in Routes
+
+**Bad:**
+
+```typescript
+// ❌ BAD: Business logic in tRPC procedure
+export const scoresRouter = createTRPCRouter({
+  create: protectedProjectProcedure
+    .input(CreateScoreInput)
+    .mutation(async ({ input, ctx }) => {
+      // ❌ Validation logic in route
+      const config = await ctx.prisma.scoreConfig.findUnique({
+        where: { id: input.configId },
+      });
+
+      if (!config) {
+        throw new TRPCError({ code: "NOT_FOUND" });
+      }
+
+      if (config.dataType === "NUMERIC" && typeof input.value !== "number") {
+        throw new TRPCError({ code: "BAD_REQUEST" });
+      }
+
+      // ❌ Direct database access
+      await ctx.prisma.score.create({
+        data: {
+          id: randomUUID(),
+          projectId: ctx.session.projectId,
+          traceId: input.traceId,
+          name: input.name,
+          value: input.value,
+        },
+      });
+
+      // ❌ More business logic
+      await auditLog({ ... });
+
+      return { success: true };
+    }),
+});
+```
+
+**Why it's bad:**
+- Business logic tied to tRPC (can't reuse in public API)
+- Hard to test (need to mock tRPC context)
+- No separation of concerns
+- Difficult to maintain
+
+**Good:**
+
+```typescript
+// ✅ GOOD: Thin procedure, delegates to service
+export const scoresRouter = createTRPCRouter({
+  create: protectedProjectProcedure
+    .input(CreateScoreInput)
+    .mutation(async ({ input, ctx }) => {
+      return await createScoreWithValidation({
+        scoreData: input,
+        userId: ctx.session.user.id,
+        projectId: ctx.session.projectId,
+      });
+    }),
+});
+```
+
+### ❌ Anti-Pattern 2: Database Calls in Routes
+
+**Bad:**
+
+```typescript
+// ❌ BAD: Direct database access in route
+export default withMiddlewares({
+  GET: createAuthedProjectAPIRoute({
+    name: "Get Scores",
+    fn: async ({ auth }) => {
+      // ❌ Direct ClickHouse query in route
+      const scores = await queryClickhouse({
+        query: "SELECT * FROM scores WHERE project_id = {projectId: String}",
+        params: { projectId: auth.scope.projectId },
+      });
+
+      return { data: scores };
+    },
+  }),
+});
+```
+
+**Good:**
+
+```typescript
+// ✅ GOOD: Delegates to service or repository
+export default withMiddlewares({
+  GET: createAuthedProjectAPIRoute({
+    name: "Get Scores",
+    fn: async ({ auth, query }) => {
+      const scoresService = new ScoresApiService("v1");
+
+      return await scoresService.generateScoresForPublicApi({
+        projectId: auth.scope.projectId,
+        page: query.page,
+        limit: query.limit,
+      });
+    },
+  }),
+});
+```
+
+### ❌ Anti-Pattern 3: Business Logic in Repositories
+
+**Bad:**
+
+```typescript
+// ❌ BAD: Business logic in repository
+export const upsertScore = async (
+  score: ScoreInsertType
+): Promise<void> => {
+  // ❌ Validation in repository
+  if (!score.name) {
+    throw new Error("Score name is required");
+  }
+
+  // ❌ Authorization check in repository
+  const project = await prisma.project.findUnique({
+    where: { id: score.projectId },
+  });
+
+  if (!project) {
+    throw new Error("Project not found");
+  }
+
+  // ❌ Side effects in repository
+  await auditLog({ ... });
+
+  await upsertClickhouse({ ... });
+};
+```
+
+**Good:**
+
+```typescript
+// ✅ GOOD: Pure data access, no business logic
+export const upsertScore = async (
+  score: ScoreInsertType
+): Promise<void> => {
+  await upsertClickhouse({
+    table: "scores",
+    records: [score],
+    eventBodyMapper: (body) => ({
+      id: body.id,
+      trace_id: body.traceId,
+      name: body.name,
+      value: body.value,
+    }),
+    tags: { feature: "scoring" },
+  });
+};
+```
+
+---
+
+**Related Files:**
+
+- [SKILL.md](../SKILL.md) - Main backend development guidelines
+- [architecture-overview.md](architecture-overview.md) - System architecture
+- [middleware-guide.md](middleware-guide.md) - Middleware patterns
+- [database-patterns.md](database-patterns.md) - Database access patterns

.claude/skills/backend-dev-guidelines/resources/services-and-repositories.md

@@ -0,0 +1,877 @@
+# Services and Repositories - Business Logic Layer
+
+Complete guide to organizing business logic with services and data access with repositories.
+
+## Table of Contents
+
+- [Service Layer Overview](#service-layer-overview)
+- [Dependency Injection Pattern](#dependency-injection-pattern)
+- [Singleton Pattern](#singleton-pattern)
+- [Repository Pattern](#repository-pattern)
+- [Service Design Principles](#service-design-principles)
+- [Caching Strategies](#caching-strategies)
+- [Testing Services](#testing-services)
+
+---
+
+## Service Layer Overview
+
+### Purpose of Services
+
+**Services contain business logic** - the 'what' and 'why' of your application:
+
+```
+Controller asks: "Should I do this?"
+Service answers: "Yes/No, here's why, and here's what happens"
+Repository executes: "Here's the data you requested"
+```
+
+**Services are responsible for:**
+
+- ✅ Business rules enforcement
+- ✅ Orchestrating multiple repositories
+- ✅ Transaction management
+- ✅ Complex calculations
+- ✅ External service integration
+- ✅ Business validations
+
+**Services should NOT:**
+
+- ❌ Know about HTTP (Request/Response)
+- ❌ Direct Prisma access (use repositories)
+- ❌ Handle route-specific logic
+- ❌ Format HTTP responses
+
+---
+
+## Dependency Injection Pattern
+
+### Why Dependency Injection?
+
+**Benefits:**
+
+- Easy to test (inject mocks)
+- Clear dependencies
+- Flexible configuration
+- Promotes loose coupling
+
+### Excellent Example: NotificationService
+
+**File:** `/blog-api/src/services/NotificationService.ts`
+
+```typescript
+// Define dependencies interface for clarity
+export interface NotificationServiceDependencies {
+  prisma: PrismaClient;
+  batchingService: BatchingService;
+  emailComposer: EmailComposer;
+}
+
+// Service with dependency injection
+export class NotificationService {
+  private prisma: PrismaClient;
+  private batchingService: BatchingService;
+  private emailComposer: EmailComposer;
+  private preferencesCache: Map<
+    string,
+    { preferences: UserPreference; timestamp: number }
+  > = new Map();
+  private CACHE_TTL =
+    (notificationConfig.preferenceCacheTTLMinutes || 5) * 60 * 1000;
+
+  // Dependencies injected via constructor
+  constructor(dependencies: NotificationServiceDependencies) {
+    this.prisma = dependencies.prisma;
+    this.batchingService = dependencies.batchingService;
+    this.emailComposer = dependencies.emailComposer;
+  }
+
+  /**
+   * Create a notification and route it appropriately
+   */
+  async createNotification(params: CreateNotificationParams) {
+    const {
+      recipientID,
+      type,
+      title,
+      message,
+      link,
+      context = {},
+      channel = "both",
+      priority = NotificationPriority.NORMAL,
+    } = params;
+
+    try {
+      // Get template and render content
+      const template = getNotificationTemplate(type);
+      const rendered = renderNotificationContent(template, context);
+
+      // Create in-app notification record
+      const notificationId = await createNotificationRecord({
+        instanceId: parseInt(context.instanceId || "0", 10),
+        template: type,
+        recipientUserId: recipientID,
+        channel: channel === "email" ? "email" : "inApp",
+        contextData: context,
+        title: finalTitle,
+        message: finalMessage,
+        link: finalLink,
+      });
+
+      // Route notification based on channel
+      if (channel === "email" || channel === "both") {
+        await this.routeNotification({
+          notificationId,
+          userId: recipientID,
+          type,
+          priority,
+          title: finalTitle,
+          message: finalMessage,
+          link: finalLink,
+          context,
+        });
+      }
+
+      return notification;
+    } catch (error) {
+      ErrorLogger.log(error, {
+        context: {
+          "[NotificationService] createNotification": {
+            type: params.type,
+            recipientID: params.recipientID,
+          },
+        },
+      });
+      throw error;
+    }
+  }
+
+  /**
+   * Route notification based on user preferences
+   */
+  private async routeNotification(params: {
+    notificationId: number;
+    userId: string;
+    type: string;
+    priority: NotificationPriority;
+    title: string;
+    message: string;
+    link?: string;
+    context?: Record<string, any>;
+  }) {
+    // Get user preferences with caching
+    const preferences = await this.getUserPreferences(params.userId);
+
+    // Check if we should batch or send immediately
+    if (this.shouldBatchEmail(preferences, params.type, params.priority)) {
+      await this.batchingService.queueNotificationForBatch({
+        notificationId: params.notificationId,
+        userId: params.userId,
+        userPreference: preferences,
+        priority: params.priority,
+      });
+    } else {
+      // Send immediately via EmailComposer
+      await this.sendImmediateEmail({
+        userId: params.userId,
+        title: params.title,
+        message: params.message,
+        link: params.link,
+        context: params.context,
+        type: params.type,
+      });
+    }
+  }
+
+  /**
+   * Determine if email should be batched
+   */
+  shouldBatchEmail(
+    preferences: UserPreference,
+    notificationType: string,
+    priority: NotificationPriority,
+  ): boolean {
+    // HIGH priority always immediate
+    if (priority === NotificationPriority.HIGH) {
+      return false;
+    }
+
+    // Check batch mode
+    const batchMode = preferences.emailBatchMode || BatchMode.IMMEDIATE;
+    return batchMode !== BatchMode.IMMEDIATE;
+  }
+
+  /**
+   * Get user preferences with caching
+   */
+  async getUserPreferences(userId: string): Promise<UserPreference> {
+    // Check cache first
+    const cached = this.preferencesCache.get(userId);
+    if (cached && Date.now() - cached.timestamp < this.CACHE_TTL) {
+      return cached.preferences;
+    }
+
+    const preference = await this.prisma.userPreference.findUnique({
+      where: { userID: userId },
+    });
+
+    const finalPreferences = preference || DEFAULT_PREFERENCES;
+
+    // Update cache
+    this.preferencesCache.set(userId, {
+      preferences: finalPreferences,
+      timestamp: Date.now(),
+    });
+
+    return finalPreferences;
+  }
+}
+```
+
+**Usage in Controller:**
+
+```typescript
+// Instantiate with dependencies
+const notificationService = new NotificationService({
+  prisma: PrismaService.main,
+  batchingService: new BatchingService(PrismaService.main),
+  emailComposer: new EmailComposer(),
+});
+
+// Use in controller
+const notification = await notificationService.createNotification({
+  recipientID: "user-123",
+  type: "AFRLWorkflowNotification",
+  context: { workflowName: "AFRL Monthly Report" },
+});
+```
+
+**Key Takeaways:**
+
+- Dependencies passed via constructor
+- Clear interface defines required dependencies
+- Easy to test (inject mocks)
+- Encapsulated caching logic
+- Business rules isolated from HTTP
+
+---
+
+## Singleton Pattern
+
+### When to Use Singletons
+
+**Use for:**
+
+- Services with expensive initialization
+- Services with shared state (caching)
+- Services accessed from many places
+- Permission services
+- Configuration services
+
+### Example: PermissionService (Singleton)
+
+**File:** `/blog-api/src/services/permissionService.ts`
+
+```typescript
+import { PrismaClient } from "@prisma/client";
+
+class PermissionService {
+  private static instance: PermissionService;
+  private prisma: PrismaClient;
+  private permissionCache: Map<
+    string,
+    { canAccess: boolean; timestamp: number }
+  > = new Map();
+  private CACHE_TTL = 5 * 60 * 1000; // 5 minutes
+
+  // Private constructor prevents direct instantiation
+  private constructor() {
+    this.prisma = PrismaService.main;
+  }
+
+  // Get singleton instance
+  public static getInstance(): PermissionService {
+    if (!PermissionService.instance) {
+      PermissionService.instance = new PermissionService();
+    }
+    return PermissionService.instance;
+  }
+
+  /**
+   * Check if user can complete a workflow step
+   */
+  async canCompleteStep(
+    userId: string,
+    stepInstanceId: number,
+  ): Promise<boolean> {
+    const cacheKey = `${userId}:${stepInstanceId}`;
+
+    // Check cache
+    const cached = this.permissionCache.get(cacheKey);
+    if (cached && Date.now() - cached.timestamp < this.CACHE_TTL) {
+      return cached.canAccess;
+    }
+
+    try {
+      const post = await this.prisma.post.findUnique({
+        where: { id: postId },
+        include: {
+          author: true,
+          comments: {
+            include: {
+              user: true,
+            },
+          },
+        },
+      });
+
+      if (!post) {
+        return false;
+      }
+
+      // Check if user has permission
+      const canEdit =
+        post.authorId === userId || (await this.isUserAdmin(userId));
+
+      // Cache result
+      this.permissionCache.set(cacheKey, {
+        canAccess: isAssigned,
+        timestamp: Date.now(),
+      });
+
+      return isAssigned;
+    } catch (error) {
+      console.error(
+        "[PermissionService] Error checking step permission:",
+        error,
+      );
+      return false;
+    }
+  }
+
+  /**
+   * Clear cache for user
+   */
+  clearUserCache(userId: string): void {
+    for (const [key] of this.permissionCache) {
+      if (key.startsWith(`${userId}:`)) {
+        this.permissionCache.delete(key);
+      }
+    }
+  }
+
+  /**
+   * Clear all cache
+   */
+  clearCache(): void {
+    this.permissionCache.clear();
+  }
+}
+
+// Export singleton instance
+export const permissionService = PermissionService.getInstance();
+```
+
+**Usage:**
+
+```typescript
+import { permissionService } from "../services/permissionService";
+
+// Use anywhere in the codebase
+const canComplete = await permissionService.canCompleteStep(userId, stepId);
+
+if (!canComplete) {
+  throw new ForbiddenError("You do not have permission to complete this step");
+}
+```
+
+---
+
+## Repository Pattern
+
+### Purpose of Repositories
+
+**Repositories abstract data access** - the 'how' of data operations:
+
+```
+Service: "Get me all active users sorted by name"
+Repository: "Here's the Prisma query that does that"
+```
+
+**Repositories are responsible for:**
+
+- ✅ All Prisma operations
+- ✅ Query construction
+- ✅ Query optimization (select, include)
+- ✅ Database error handling
+- ✅ Caching database results
+
+**Repositories should NOT:**
+
+- ❌ Contain business logic
+- ❌ Know about HTTP
+- ❌ Make decisions (that's service layer)
+
+### Repository Template
+
+```typescript
+// repositories/UserRepository.ts
+import { PrismaService } from "@project-lifecycle-portal/database";
+import type { User, Prisma } from "@project-lifecycle-portal/database";
+
+export class UserRepository {
+  /**
+   * Find user by ID with optimized query
+   */
+  async findById(userId: string): Promise<User | null> {
+    try {
+      return await PrismaService.main.user.findUnique({
+        where: { userID: userId },
+        select: {
+          userID: true,
+          email: true,
+          name: true,
+          isActive: true,
+          roles: true,
+          createdAt: true,
+          updatedAt: true,
+        },
+      });
+    } catch (error) {
+      console.error("[UserRepository] Error finding user by ID:", error);
+      throw new Error(`Failed to find user: ${userId}`);
+    }
+  }
+
+  /**
+   * Find all active users
+   */
+  async findActive(options?: {
+    orderBy?: Prisma.UserOrderByWithRelationInput;
+  }): Promise<User[]> {
+    try {
+      return await PrismaService.main.user.findMany({
+        where: { isActive: true },
+        orderBy: options?.orderBy || { name: "asc" },
+        select: {
+          userID: true,
+          email: true,
+          name: true,
+          roles: true,
+        },
+      });
+    } catch (error) {
+      console.error("[UserRepository] Error finding active users:", error);
+      throw new Error("Failed to find active users");
+    }
+  }
+
+  /**
+   * Find user by email
+   */
+  async findByEmail(email: string): Promise<User | null> {
+    try {
+      return await PrismaService.main.user.findUnique({
+        where: { email },
+      });
+    } catch (error) {
+      console.error("[UserRepository] Error finding user by email:", error);
+      throw new Error(`Failed to find user with email: ${email}`);
+    }
+  }
+
+  /**
+   * Create new user
+   */
+  async create(data: Prisma.UserCreateInput): Promise<User> {
+    try {
+      return await PrismaService.main.user.create({ data });
+    } catch (error) {
+      console.error("[UserRepository] Error creating user:", error);
+      throw new Error("Failed to create user");
+    }
+  }
+
+  /**
+   * Update user
+   */
+  async update(userId: string, data: Prisma.UserUpdateInput): Promise<User> {
+    try {
+      return await PrismaService.main.user.update({
+        where: { userID: userId },
+        data,
+      });
+    } catch (error) {
+      console.error("[UserRepository] Error updating user:", error);
+      throw new Error(`Failed to update user: ${userId}`);
+    }
+  }
+
+  /**
+   * Delete user (soft delete by setting isActive = false)
+   */
+  async delete(userId: string): Promise<User> {
+    try {
+      return await PrismaService.main.user.update({
+        where: { userID: userId },
+        data: { isActive: false },
+      });
+    } catch (error) {
+      console.error("[UserRepository] Error deleting user:", error);
+      throw new Error(`Failed to delete user: ${userId}`);
+    }
+  }
+
+  /**
+   * Check if email exists
+   */
+  async emailExists(email: string): Promise<boolean> {
+    try {
+      const count = await PrismaService.main.user.count({
+        where: { email },
+      });
+      return count > 0;
+    } catch (error) {
+      console.error("[UserRepository] Error checking email exists:", error);
+      throw new Error("Failed to check if email exists");
+    }
+  }
+}
+
+// Export singleton instance
+export const userRepository = new UserRepository();
+```
+
+**Using Repository in Service:**
+
+```typescript
+// services/userService.ts
+import { userRepository } from "../repositories/UserRepository";
+import { ConflictError, NotFoundError } from "../utils/errors";
+
+export class UserService {
+  /**
+   * Create new user with business rules
+   */
+  async createUser(data: {
+    email: string;
+    name: string;
+    roles: string[];
+  }): Promise<User> {
+    // Business rule: Check if email already exists
+    const emailExists = await userRepository.emailExists(data.email);
+    if (emailExists) {
+      throw new ConflictError("Email already exists");
+    }
+
+    // Business rule: Validate roles
+    const validRoles = ["admin", "operations", "user"];
+    const invalidRoles = data.roles.filter(
+      (role) => !validRoles.includes(role),
+    );
+    if (invalidRoles.length > 0) {
+      throw new ValidationError(`Invalid roles: ${invalidRoles.join(", ")}`);
+    }
+
+    // Create user via repository
+    return await userRepository.create({
+      email: data.email,
+      name: data.name,
+      roles: data.roles,
+      isActive: true,
+    });
+  }
+
+  /**
+   * Get user by ID
+   */
+  async getUser(userId: string): Promise<User> {
+    const user = await userRepository.findById(userId);
+
+    if (!user) {
+      throw new NotFoundError(`User not found: ${userId}`);
+    }
+
+    return user;
+  }
+}
+```
+
+---
+
+## Service Design Principles
+
+### 1. Single Responsibility
+
+Each service should have ONE clear purpose:
+
+```typescript
+// ✅ GOOD - Single responsibility
+class UserService {
+  async createUser() {}
+  async updateUser() {}
+  async deleteUser() {}
+}
+
+class EmailService {
+  async sendEmail() {}
+  async sendBulkEmails() {}
+}
+
+// ❌ BAD - Too many responsibilities
+class UserService {
+  async createUser() {}
+  async sendWelcomeEmail() {} // Should be EmailService
+  async logUserActivity() {} // Should be AuditService
+  async processPayment() {} // Should be PaymentService
+}
+```
+
+### 2. Clear Method Names
+
+Method names should describe WHAT they do:
+
+```typescript
+// ✅ GOOD - Clear intent
+async createNotification()
+async getUserPreferences()
+async shouldBatchEmail()
+async routeNotification()
+
+// ❌ BAD - Vague or misleading
+async process()
+async handle()
+async doIt()
+async execute()
+```
+
+### 3. Use Params Objects for Multiple Arguments
+
+When a function receives multiple arguments, use a single params object instead of positional arguments:
+
+```typescript
+// ❌ BAD - Positional arguments are unclear and can be swapped
+async function createTrace(
+  projectId: string,
+  userId: string,
+  sessionId: string,
+  name: string,
+) {}
+
+// Call site - which string is which?
+await createTrace(projectId, userId, sessionId, name);
+
+// ✅ GOOD - Params object makes intent clear
+async function createTrace(params: {
+  projectId: string;
+  userId: string;
+  sessionId: string;
+  name: string;
+}) {}
+
+// Call site - clear and prevents argument swapping bugs
+await createTrace({ projectId, userId, sessionId, name });
+```
+
+**Benefits:**
+
+- More readable at call sites
+- Prevents bugs when positional arguments of the same type are accidentally swapped
+- Easier to add optional parameters later
+- Self-documenting code
+
+### 4. Return Types
+
+Always use explicit return types:
+
+```typescript
+// ✅ GOOD - Explicit types
+async createUser(data: CreateUserDTO): Promise<User> {}
+async findUsers(): Promise<User[]> {}
+async deleteUser(id: string): Promise<void> {}
+
+// ❌ BAD - Implicit any
+async createUser(data) {}  // No types!
+```
+
+### 5. Error Handling
+
+Services should throw meaningful errors:
+
+```typescript
+// ✅ GOOD - Meaningful errors
+if (!user) {
+  throw new NotFoundError(`User not found: ${userId}`);
+}
+
+if (emailExists) {
+  throw new ConflictError("Email already exists");
+}
+
+// ❌ BAD - Generic errors
+if (!user) {
+  throw new Error("Error"); // What error?
+}
+```
+
+### 6. Avoid God Services
+
+Don't create services that do everything:
+
+```typescript
+// ❌ BAD - God service
+class WorkflowService {
+  async startWorkflow() {}
+  async completeStep() {}
+  async assignRoles() {}
+  async sendNotifications() {} // Should be NotificationService
+  async validatePermissions() {} // Should be PermissionService
+  async logAuditTrail() {} // Should be AuditService
+  // ... 50 more methods
+}
+
+// ✅ GOOD - Focused services
+class WorkflowService {
+  constructor(
+    private notificationService: NotificationService,
+    private permissionService: PermissionService,
+    private auditService: AuditService,
+  ) {}
+
+  async startWorkflow() {
+    // Orchestrate other services
+    await this.permissionService.checkPermission();
+    await this.workflowRepository.create();
+    await this.notificationService.notify();
+    await this.auditService.log();
+  }
+}
+```
+
+---
+
+## Caching Strategies
+
+### 1. In-Memory Caching
+
+```typescript
+class UserService {
+  private cache: Map<string, { user: User; timestamp: number }> = new Map();
+  private CACHE_TTL = 5 * 60 * 1000; // 5 minutes
+
+  async getUser(userId: string): Promise<User> {
+    // Check cache
+    const cached = this.cache.get(userId);
+    if (cached && Date.now() - cached.timestamp < this.CACHE_TTL) {
+      return cached.user;
+    }
+
+    // Fetch from database
+    const user = await userRepository.findById(userId);
+
+    // Update cache
+    if (user) {
+      this.cache.set(userId, { user, timestamp: Date.now() });
+    }
+
+    return user;
+  }
+
+  clearUserCache(userId: string): void {
+    this.cache.delete(userId);
+  }
+}
+```
+
+### 2. Cache Invalidation
+
+```typescript
+class UserService {
+  async updateUser(userId: string, data: UpdateUserDTO): Promise<User> {
+    // Update in database
+    const user = await userRepository.update(userId, data);
+
+    // Invalidate cache
+    this.clearUserCache(userId);
+
+    return user;
+  }
+}
+```
+
+---
+
+## Testing Services
+
+### Unit Tests
+
+```typescript
+// tests/userService.test.ts
+import { UserService } from "../services/userService";
+import { userRepository } from "../repositories/UserRepository";
+import { ConflictError } from "../utils/errors";
+
+// Mock repository
+jest.mock("../repositories/UserRepository");
+
+describe("UserService", () => {
+  let userService: UserService;
+
+  beforeEach(() => {
+    userService = new UserService();
+    jest.clearAllMocks();
+  });
+
+  describe("createUser", () => {
+    it("should create user when email does not exist", async () => {
+      // Arrange
+      const userData = {
+        email: "test@example.com",
+        name: "Test User",
+        roles: ["user"],
+      };
+
+      (userRepository.emailExists as jest.Mock).mockResolvedValue(false);
+      (userRepository.create as jest.Mock).mockResolvedValue({
+        userID: "123",
+        ...userData,
+      });
+
+      // Act
+      const user = await userService.createUser(userData);
+
+      // Assert
+      expect(user).toBeDefined();
+      expect(user.email).toBe(userData.email);
+      expect(userRepository.emailExists).toHaveBeenCalledWith(userData.email);
+      expect(userRepository.create).toHaveBeenCalled();
+    });
+
+    it("should throw ConflictError when email exists", async () => {
+      // Arrange
+      const userData = {
+        email: "existing@example.com",
+        name: "Test User",
+        roles: ["user"],
+      };
+
+      (userRepository.emailExists as jest.Mock).mockResolvedValue(true);
+
+      // Act & Assert
+      await expect(userService.createUser(userData)).rejects.toThrow(
+        ConflictError,
+      );
+      expect(userRepository.create).not.toHaveBeenCalled();
+    });
+  });
+});
+```
+
+---
+
+**Related Files:**
+
+- [SKILL.md](SKILL.md) - Main guide
+- [routing-and-controllers.md](routing-and-controllers.md) - Controllers that use services
+- [database-patterns.md](database-patterns.md) - Prisma and repository patterns
+- [complete-examples.md](complete-examples.md) - Full service/repository examples

.claude/skills/backend-dev-guidelines/resources/testing-guide.md

@@ -0,0 +1,558 @@
+# Testing Guide - Backend Testing Strategies
+
+Complete guide to testing Langfuse backend services across web, worker, and shared packages.
+
+## Table of Contents
+
+- [Test Types Overview](#test-types-overview)
+- [Integration Tests (Public API)](#integration-tests-public-api)
+- [Service-Level Tests (Repository/Service)](#service-level-tests-repositoryservice)
+- [tRPC Tests (Procedure Testing)](#trpc-tests-procedure-testing)
+- [Worker Tests (Queue Processing)](#worker-tests-queue-processing)
+- [Key Testing Principles](#key-testing-principles)
+- [Running Tests](#running-tests)
+
+---
+
+## Test Types Overview
+
+Langfuse uses multiple testing strategies for different layers:
+
+| Test Type | Framework | Location | Purpose |
+|-----------|-----------|----------|---------|
+| Integration | Jest | `web/src/__tests__/async/` | Full API endpoint testing |
+| tRPC | Jest | `web/src/__tests__/async/` | tRPC procedure testing with auth |
+| Service | Jest | `web/src/__tests__/async/repositories/` | Repository/service function testing |
+| Worker | Vitest | `worker/src/__tests__/` | Queue processors and streams |
+
+---
+
+## Integration Tests (Public API)
+
+Test full REST API endpoints end-to-end using HTTP requests.
+
+**File location:** `web/src/__tests__/async/datasets-api.servertest.ts`
+
+```typescript
+import { makeZodVerifiedAPICall } from "../helpers";
+import { PostDatasetsV1Response } from "@/src/features/public-api/types/datasets";
+
+describe("Dataset API", () => {
+  it("should create dataset", async () => {
+    const res = await makeZodVerifiedAPICall(
+      PostDatasetsV1Response,
+      "POST",
+      "/api/public/datasets",
+      { name: "test-dataset" },
+      auth,
+    );
+    expect(res.status).toBe(200);
+  });
+
+  it("should validate input", async () => {
+    const res = await makeZodVerifiedAPICall(
+      PostDatasetsV1Response,
+      "POST",
+      "/api/public/datasets",
+      { name: "" }, // Invalid empty name
+      auth,
+    );
+    expect(res.status).toBe(400);
+  });
+});
+```
+
+**Key Points:**
+- Uses `makeZodVerifiedAPICall` for type-safe API testing
+- Tests HTTP status codes and response validation
+- Tests both success and error cases
+
+---
+
+## Service-Level Tests (Repository/Service)
+
+Test individual repository/service functions with isolated data.
+
+**File location:** `web/src/__tests__/async/repositories/event-repository.servertest.ts`
+
+```typescript
+import {
+  createEvent,
+  createEventsCh,
+  getObservationsWithModelDataFromEventsTable,
+} from "@langfuse/shared/src/server";
+import { prisma } from "@langfuse/shared/src/db";
+import { randomUUID } from "crypto";
+
+describe("Event Repository Tests", () => {
+  it("should return observations with model data", async () => {
+    const traceId = randomUUID();
+    const generationId = randomUUID();
+    const modelId = randomUUID();
+
+    // Create test data
+    await prisma.model.create({
+      data: {
+        id: modelId,
+        projectId,
+        modelName: `gpt-4-${modelId}`,
+        matchPattern: `(?i)^(gpt-?4-${modelId})$`,
+        startDate: new Date("2023-01-01"),
+        unit: "TOKENS",
+        Price: {
+          create: [
+            { usageType: "input", price: 0.03 },
+            { usageType: "output", price: 0.06 },
+          ],
+        },
+      },
+    });
+
+    const event = createEvent({
+      id: generationId,
+      span_id: generationId,
+      project_id: projectId,
+      trace_id: traceId,
+      type: "GENERATION",
+      name: `test-generation-${generationId}`,
+      model_id: modelId,
+    });
+
+    await createEventsCh([event]);
+
+    // Test the service function
+    const result = await getObservationsWithModelDataFromEventsTable({
+      projectId,
+      filter: [{ type: "string", column: "id", operator: "=", value: generationId }],
+      limit: 1000,
+      offset: 0,
+    });
+
+    expect(result.length).toBeGreaterThan(0);
+    const observation = result.find((o) => o.id === generationId);
+    expect(observation?.internalModelId).toBe(modelId);
+    expect(Number(observation?.inputPrice)).toBeCloseTo(0.03, 5);
+
+    // Cleanup
+    await prisma.model.delete({ where: { id: modelId } });
+  });
+
+  it("should handle filters correctly", async () => {
+    const projectId = randomUUID();
+    const traceId = randomUUID();
+
+    const observations = [
+      createEvent({
+        id: randomUUID(),
+        project_id: projectId,
+        trace_id: traceId,
+        type: "GENERATION",
+        name: "test1",
+      }),
+      createEvent({
+        id: randomUUID(),
+        project_id: projectId,
+        trace_id: traceId,
+        type: "SPAN",
+        name: "test2",
+      }),
+    ];
+
+    await createEventsCh(observations);
+
+    const result = await getObservationsWithModelDataFromEventsTable({
+      projectId,
+      filter: [
+        { type: "stringOptions", column: "type", operator: "any of", value: ["GENERATION"] }
+      ],
+      limit: 1000,
+      offset: 0,
+    });
+
+    expect(result.every(o => o.type === "GENERATION")).toBe(true);
+  });
+});
+```
+
+**Key Points:**
+- Tests service/repository functions directly
+- Uses ClickHouse and Prisma test data
+- Always cleanup test data after tests
+- Use unique IDs to avoid test interference
+
+---
+
+## tRPC Tests (Procedure Testing)
+
+Test tRPC procedures with caller pattern and auth context.
+
+**File location:** `web/src/__tests__/async/automations-trpc.servertest.ts`
+
+```typescript
+import { appRouter } from "@/src/server/api/root";
+import { createInnerTRPCContext } from "@/src/server/api/trpc";
+import { prisma } from "@langfuse/shared/src/db";
+import { createOrgProjectAndApiKey } from "@langfuse/shared/src/server";
+import type { Session } from "next-auth";
+import { v4 } from "uuid";
+import { JobConfigState } from "@langfuse/shared";
+
+async function prepare() {
+  const { project, org } = await createOrgProjectAndApiKey();
+
+  const session: Session = {
+    expires: "1",
+    user: {
+      id: "user-1",
+      name: "Demo User",
+      organizations: [{
+        id: org.id,
+        name: org.name,
+        role: "OWNER",
+        projects: [{
+          id: project.id,
+          role: "ADMIN",
+          name: project.name,
+        }],
+      }],
+    },
+  };
+
+  const ctx = createInnerTRPCContext({ session, headers: {} });
+  const caller = appRouter.createCaller({ ...ctx, prisma });
+
+  return { project, org, session, ctx, caller };
+}
+
+describe("automations trpc", () => {
+  it("should retrieve all automations for a project", async () => {
+    const { project, caller } = await prepare();
+
+    // Create test trigger
+    const trigger = await prisma.trigger.create({
+      data: {
+        id: v4(),
+        projectId: project.id,
+        eventSource: "prompt",
+        eventActions: ["created"],
+        filter: [],
+        status: JobConfigState.ACTIVE,
+      },
+    });
+
+    // Create test action
+    const action = await prisma.action.create({
+      data: {
+        id: v4(),
+        projectId: project.id,
+        type: "WEBHOOK",
+        config: {
+          type: "WEBHOOK",
+          url: "https://example.com/webhook",
+          headers: { "Content-Type": "application/json" },
+        },
+      },
+    });
+
+    // Link trigger to action
+    await prisma.automation.create({
+      data: {
+        projectId: project.id,
+        triggerId: trigger.id,
+        actionId: action.id,
+        name: "Test Automation",
+      },
+    });
+
+    // Call tRPC procedure
+    const response = await caller.automations.getAutomations({
+      projectId: project.id,
+    });
+
+    expect(response).toHaveLength(1);
+    expect(response[0]).toMatchObject({
+      name: "Test Automation",
+      trigger: expect.objectContaining({
+        id: trigger.id,
+        eventSource: "prompt",
+      }),
+    });
+  });
+
+  it("should throw error when user lacks permissions", async () => {
+    const { project, session } = await prepare();
+
+    // Create limited session
+    const limitedSession: Session = {
+      ...session,
+      user: {
+        ...session.user!,
+        organizations: [{
+          ...session.user!.organizations[0],
+          projects: [{
+            ...session.user!.organizations[0].projects[0],
+            role: "VIEWER", // VIEWER can't create automations
+          }],
+        }],
+      },
+    };
+
+    const limitedCtx = createInnerTRPCContext({
+      session: limitedSession,
+      headers: {},
+    });
+    const limitedCaller = appRouter.createCaller({ ...limitedCtx, prisma });
+
+    await expect(
+      limitedCaller.automations.createAutomation({
+        projectId: project.id,
+        name: "Unauthorized",
+        eventSource: "prompt",
+        eventAction: ["created"],
+        filter: [],
+        status: JobConfigState.ACTIVE,
+        actionType: "WEBHOOK",
+        actionConfig: {
+          type: "WEBHOOK",
+          url: "https://example.com/webhook",
+          requestHeaders: {},
+          apiVersion: { prompt: "v1" },
+        },
+      }),
+    ).rejects.toThrow("User does not have access");
+  });
+});
+```
+
+**Key Points:**
+- Uses `prepare()` helper to set up test context
+- Creates authenticated caller with `appRouter.createCaller`
+- Tests both success and permission error cases
+- Can test different user roles and permissions
+
+---
+
+## Worker Tests (Queue Processing)
+
+Test queue processors and stream functions using vitest.
+
+**File location:** `worker/src/__tests__/batchExport.test.ts`
+
+```typescript
+import { randomUUID } from "crypto";
+import { expect, describe, it } from "vitest";
+import {
+  createObservation,
+  createObservationsCh,
+  createOrgProjectAndApiKey,
+  createTraceScore,
+  createScoresCh,
+  createTrace,
+  createTracesCh,
+} from "@langfuse/shared/src/server";
+import { getObservationStream } from "../features/database-read-stream/observation-stream";
+
+describe("batch export test suite", () => {
+  it("should export observations", async () => {
+    const { projectId } = await createOrgProjectAndApiKey();
+
+    const traceId = randomUUID();
+    const trace = createTrace({
+      project_id: projectId,
+      id: traceId,
+    });
+
+    await createTracesCh([trace]);
+
+    const observations = [
+      createObservation({
+        project_id: projectId,
+        trace_id: traceId,
+        type: "SPAN",
+      }),
+      createObservation({
+        project_id: projectId,
+        trace_id: randomUUID(),
+        type: "GENERATION",
+      }),
+    ];
+
+    const score = createTraceScore({
+      project_id: projectId,
+      trace_id: traceId,
+      observation_id: observations[0].id,
+      name: "test",
+      value: 123,
+    });
+
+    await createScoresCh([score]);
+    await createObservationsCh(observations);
+
+    // Test the stream function
+    const stream = await getObservationStream({
+      projectId: projectId,
+      cutoffCreatedAt: new Date(Date.now() + 1000 * 60 * 60 * 24),
+      filter: [],
+    });
+
+    const rows: any[] = [];
+    for await (const chunk of stream) {
+      rows.push(chunk);
+    }
+
+    expect(rows).toHaveLength(2);
+    expect(rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          id: observations[0].id,
+          type: observations[0].type,
+          test: [score.value],
+        }),
+      ]),
+    );
+  });
+
+  it("should export with filters", async () => {
+    const { projectId } = await createOrgProjectAndApiKey();
+
+    const observations = [
+      createObservation({
+        project_id: projectId,
+        trace_id: randomUUID(),
+        type: "GENERATION",
+        name: "test1",
+      }),
+      createObservation({
+        project_id: projectId,
+        trace_id: randomUUID(),
+        type: "SPAN",
+        name: "test2",
+      }),
+    ];
+
+    await createObservationsCh(observations);
+
+    const stream = await getObservationStream({
+      projectId: projectId,
+      cutoffCreatedAt: new Date(Date.now() + 1000 * 60 * 60 * 24),
+      filter: [
+        {
+          type: "stringOptions",
+          operator: "any of",
+          column: "name",
+          value: ["test1"],
+        },
+      ],
+    });
+
+    const rows: any[] = [];
+    for await (const chunk of stream) {
+      rows.push(chunk);
+    }
+
+    expect(rows).toHaveLength(1);
+    expect(rows[0].name).toBe("test1");
+  });
+});
+```
+
+**Key Points:**
+- Uses vitest (not Jest) for worker tests
+- Tests stream functions with async iteration
+- Creates isolated test data per test
+- Use unique project IDs to avoid interference
+
+---
+
+## Key Testing Principles
+
+### General Principles
+
+1. **Test Isolation**: Each test should be independent and runnable in any order
+2. **Unique IDs**: Use `randomUUID()` or unique project IDs to avoid test interference
+3. **Cleanup**: Always clean up test data in service tests (or use unique project IDs)
+4. **No `pruneDatabase`**: Avoid `pruneDatabase` calls, especially in `__tests__/async/` directory
+
+### By Test Type
+
+| Test Type | Key Principles |
+|-----------|----------------|
+| **Integration** | Test HTTP endpoints, validate status codes and response shapes |
+| **tRPC** | Use `createInnerTRPCContext` and `appRouter.createCaller`, test auth/permissions |
+| **Service** | Test individual functions with isolated data, always cleanup |
+| **Worker** | Use vitest, test streams with async iteration, test filtering logic |
+
+### Test Data Management
+
+```typescript
+// ✅ GOOD: Use unique IDs
+const projectId = randomUUID();
+const traceId = randomUUID();
+
+// ✅ GOOD: Cleanup in service tests
+afterAll(async () => {
+  await prisma.model.delete({ where: { id: modelId } });
+});
+
+// ✅ GOOD: Use unique projects (no cleanup needed)
+const { projectId } = await createOrgProjectAndApiKey();
+
+// ❌ BAD: Shared test data between tests
+const projectId = "7a88fb47-b4e2-43b8-a06c-a5ce950dc53a";
+
+// ❌ BAD: Using pruneDatabase
+await pruneDatabase();
+```
+
+---
+
+## Running Tests
+
+### Web Tests (Jest)
+
+```bash
+# Run all tests
+pnpm test
+
+# Run sync tests
+pnpm test-sync
+
+# Run async tests
+pnpm test -- --testPathPattern="async"
+
+# Run specific test file
+pnpm test -- --testPathPattern="datasets-api"
+
+# Run specific test
+pnpm test -- --testPathPattern="datasets-api" --testNamePattern="should create dataset"
+```
+
+### Worker Tests (Vitest)
+
+```bash
+# Run all worker tests
+pnpm run test --filter=worker
+
+# Run specific test file
+pnpm run test --filter=worker -- batchExport
+
+# Run specific test
+pnpm run test --filter=worker -- batchExport -t "should export observations"
+```
+
+### Coverage
+
+```bash
+# Web coverage
+pnpm test -- --coverage
+
+# Worker coverage
+pnpm run test --filter=worker -- --coverage
+```
+
+---
+
+**Related Files:**
+- [SKILL.md](../SKILL.md) - Main backend guidelines
+- [architecture-overview.md](architecture-overview.md) - Architecture patterns
+- [complete-examples.md](complete-examples.md) - Full code examples

.claude/skills/skill-developer/ADVANCED.md

@@ -0,0 +1,197 @@
+# Advanced Topics & Future Enhancements
+
+Ideas and concepts for future improvements to the skill system.
+
+---
+
+## Dynamic Rule Updates
+
+**Current State:** Requires Claude Code restart to pick up changes to skill-rules.json
+
+**Future Enhancement:** Hot-reload configuration without restart
+
+**Implementation Ideas:**
+- Watch skill-rules.json for changes
+- Reload on file modification
+- Invalidate cached compiled regexes
+- Notify user of reload
+
+**Benefits:**
+- Faster iteration during skill development
+- No need to restart Claude Code
+- Better developer experience
+
+---
+
+## Skill Dependencies
+
+**Current State:** Skills are independent
+
+**Future Enhancement:** Specify skill dependencies and load order
+
+**Configuration Idea:**
+```json
+{
+  "my-advanced-skill": {
+    "dependsOn": ["prerequisite-skill", "base-skill"],
+    "type": "domain",
+    ...
+  }
+}
+```
+
+**Use Cases:**
+- Advanced skill builds on base skill knowledge
+- Ensure foundational skills loaded first
+- Chain skills for complex workflows
+
+**Benefits:**
+- Better skill composition
+- Clearer skill relationships
+- Progressive disclosure
+
+---
+
+## Conditional Enforcement
+
+**Current State:** Enforcement level is static
+
+**Future Enhancement:** Enforce based on context or environment
+
+**Configuration Idea:**
+```json
+{
+  "enforcement": {
+    "default": "suggest",
+    "when": {
+      "production": "block",
+      "development": "suggest",
+      "ci": "block"
+    }
+  }
+}
+```
+
+**Use Cases:**
+- Stricter enforcement in production
+- Relaxed rules during development
+- CI/CD pipeline requirements
+
+**Benefits:**
+- Environment-appropriate enforcement
+- Flexible rule application
+- Context-aware guardrails
+
+---
+
+## Skill Analytics
+
+**Current State:** No usage tracking
+
+**Future Enhancement:** Track skill usage patterns and effectiveness
+
+**Metrics to Collect:**
+- Skill trigger frequency
+- False positive rate
+- False negative rate
+- Time to skill usage after suggestion
+- User override rate (skip markers, env vars)
+- Performance metrics (execution time)
+
+**Dashbord Ideas:**
+- Most/least used skills
+- Skills with highest false positive rate
+- Performance bottlenecks
+- Skill effectiveness scores
+
+**Benefits:**
+- Data-driven skill improvement
+- Identify problems early
+- Optimize patterns based on real usage
+
+---
+
+## Skill Versioning
+
+**Current State:** No version tracking
+
+**Future Enhancement:** Version skills and track compatibility
+
+**Configuration Idea:**
+```json
+{
+  "my-skill": {
+    "version": "2.1.0",
+    "minClaudeVersion": "1.5.0",
+    "changelog": "Added support for new workflow patterns",
+    ...
+  }
+}
+```
+
+**Benefits:**
+- Track skill evolution
+- Ensure compatibility
+- Document changes
+- Support migration paths
+
+---
+
+## Multi-Language Support
+
+**Current State:** English only
+
+**Future Enhancement:** Support multiple languages for skill content
+
+**Implementation Ideas:**
+- Language-specific SKILL.md variants
+- Automatic language detection
+- Fallback to English
+
+**Use Cases:**
+- International teams
+- Localized documentation
+- Multi-language projects
+
+---
+
+## Skill Testing Framework
+
+**Current State:** Manual testing with npx tsx commands
+
+**Future Enhancement:** Automated skill testing
+
+**Features:**
+- Test cases for trigger patterns
+- Assertion framework
+- CI/CD integration
+- Coverage reports
+
+**Example Test:**
+```typescript
+describe('database-verification', () => {
+  it('triggers on Prisma imports', () => {
+    const result = testSkill({
+      prompt: "add user tracking",
+      file: "services/user.ts",
+      content: "import { PrismaService } from './prisma'"
+    });
+
+    expect(result.triggered).toBe(true);
+    expect(result.skill).toBe('database-verification');
+  });
+});
+```
+
+**Benefits:**
+- Prevent regressions
+- Validate patterns before deployment
+- Confidence in changes
+
+---
+
+## Related Files
+
+- [SKILL.md](SKILL.md) - Main skill guide
+- [TROUBLESHOOTING.md](TROUBLESHOOTING.md) - Current debugging guide
+- [HOOK_MECHANISMS.md](HOOK_MECHANISMS.md) - How hooks work today

.claude/skills/skill-developer/HOOK_MECHANISMS.md

@@ -0,0 +1,306 @@
+# Hook Mechanisms - Deep Dive
+
+Technical deep dive into how the UserPromptSubmit and PreToolUse hooks work.
+
+## Table of Contents
+
+- [UserPromptSubmit Hook Flow](#userpromptsubmit-hook-flow)
+- [PreToolUse Hook Flow](#pretooluse-hook-flow)
+- [Exit Code Behavior (CRITICAL)](#exit-code-behavior-critical)
+- [Session State Management](#session-state-management)
+- [Performance Considerations](#performance-considerations)
+
+---
+
+## UserPromptSubmit Hook Flow
+
+### Execution Sequence
+
+```
+User submits prompt
+    ↓
+.claude/settings.json registers hook
+    ↓
+skill-activation-prompt.sh executes
+    ↓
+npx tsx skill-activation-prompt.ts
+    ↓
+Hook reads stdin (JSON with prompt)
+    ↓
+Loads skill-rules.json
+    ↓
+Matches keywords + intent patterns
+    ↓
+Groups matches by priority (critical → high → medium → low)
+    ↓
+Outputs formatted message to stdout
+    ↓
+stdout becomes context for Claude (injected before prompt)
+    ↓
+Claude sees: [skill suggestion] + user's prompt
+```
+
+### Key Points
+
+- **Exit code**: Always 0 (allow)
+- **stdout**: → Claude's context (injected as system message)
+- **Timing**: Runs BEFORE Claude processes prompt
+- **Behavior**: Non-blocking, advisory only
+- **Purpose**: Make Claude aware of relevant skills
+
+### Input Format
+
+```json
+{
+  "session_id": "abc-123",
+  "transcript_path": "/path/to/transcript.json",
+  "cwd": "/root/git/your-project",
+  "permission_mode": "normal",
+  "hook_event_name": "UserPromptSubmit",
+  "prompt": "how does the layout system work?"
+}
+```
+
+### Output Format (to stdout)
+
+```
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+🎯 SKILL ACTIVATION CHECK
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+📚 RECOMMENDED SKILLS:
+  → project-catalog-developer
+
+ACTION: Use Skill tool BEFORE responding
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+```
+
+Claude sees this output as additional context before processing the user's prompt.
+
+---
+
+## PreToolUse Hook Flow
+
+### Execution Sequence
+
+```
+Claude calls Edit/Write tool
+    ↓
+.claude/settings.json registers hook (matcher: Edit|Write)
+    ↓
+skill-verification-guard.sh executes
+    ↓
+npx tsx skill-verification-guard.ts
+    ↓
+Hook reads stdin (JSON with tool_name, tool_input)
+    ↓
+Loads skill-rules.json
+    ↓
+Checks file path patterns (glob matching)
+    ↓
+Reads file for content patterns (if file exists)
+    ↓
+Checks session state (was skill already used?)
+    ↓
+Checks skip conditions (file markers, env vars)
+    ↓
+IF MATCHED AND NOT SKIPPED:
+  Update session state (mark skill as enforced)
+  Output block message to stderr
+  Exit with code 2 (BLOCK)
+ELSE:
+  Exit with code 0 (ALLOW)
+    ↓
+IF BLOCKED:
+  stderr → Claude sees message
+  Edit/Write tool does NOT execute
+  Claude must use skill and retry
+IF ALLOWED:
+  Tool executes normally
+```
+
+### Key Points
+
+- **Exit code 2**: BLOCK (stderr → Claude)
+- **Exit code 0**: ALLOW
+- **Timing**: Runs BEFORE tool execution
+- **Session tracking**: Prevents repeated blocks in same session
+- **Fail open**: On errors, allows operation (don't break workflow)
+- **Purpose**: Enforce critical guardrails
+
+### Input Format
+
+```json
+{
+  "session_id": "abc-123",
+  "transcript_path": "/path/to/transcript.json",
+  "cwd": "/root/git/your-project",
+  "permission_mode": "normal",
+  "hook_event_name": "PreToolUse",
+  "tool_name": "Edit",
+  "tool_input": {
+    "file_path": "/root/git/your-project/form/src/services/user.ts",
+    "old_string": "...",
+    "new_string": "..."
+  }
+}
+```
+
+### Output Format (to stderr when blocked)
+
+```
+⚠️ BLOCKED - Database Operation Detected
+
+📋 REQUIRED ACTION:
+1. Use Skill tool: 'database-verification'
+2. Verify ALL table and column names against schema
+3. Check database structure with DESCRIBE commands
+4. Then retry this edit
+
+Reason: Prevent column name errors in Prisma queries
+File: form/src/services/user.ts
+
+💡 TIP: Add '// @skip-validation' comment to skip future checks
+```
+
+Claude receives this message and understands it needs to use the skill before retrying the edit.
+
+---
+
+## Exit Code Behavior (CRITICAL)
+
+### Exit Code Reference Table
+
+| Exit Code | stdout | stderr | Tool Execution | Claude Sees |
+|-----------|--------|--------|----------------|-------------|
+| 0 (UserPromptSubmit) | → Context | → User only | N/A | stdout content |
+| 0 (PreToolUse) | → User only | → User only | **Proceeds** | Nothing |
+| 2 (PreToolUse) | → User only | → **CLAUDE** | **BLOCKED** | stderr content |
+| Other | → User only | → User only | Blocked | Nothing |
+
+### Why Exit Code 2 Matters
+
+This is THE critical mechanism for enforcement:
+
+1. **Only way** to send message to Claude from PreToolUse
+2. stderr content is "fed back to Claude automatically"
+3. Claude sees the block message and understands what to do
+4. Tool execution is prevented
+5. Critical for enforcement of guardrails
+
+### Example Conversation Flow
+
+```
+User: "Add a new user service with Prisma"
+
+Claude: "I'll create the user service..."
+    [Attempts to Edit form/src/services/user.ts]
+
+PreToolUse Hook: [Exit code 2]
+    stderr: "⚠️ BLOCKED - Use database-verification"
+
+Claude sees error, responds:
+    "I need to verify the database schema first."
+    [Uses Skill tool: database-verification]
+    [Verifies column names]
+    [Retries Edit - now allowed (session tracking)]
+```
+
+---
+
+## Session State Management
+
+### Purpose
+
+Prevent repeated nagging in the same session - once Claude uses a skill, don't block again.
+
+### State File Location
+
+`.claude/hooks/state/skills-used-{session_id}.json`
+
+### State File Structure
+
+```json
+{
+  "skills_used": [
+    "database-verification",
+    "error-tracking"
+  ],
+  "files_verified": []
+}
+```
+
+### How It Works
+
+1. **First edit** of file with Prisma:
+   - Hook blocks with exit code 2
+   - Updates session state: adds "database-verification" to skills_used
+   - Claude sees message, uses skill
+
+2. **Second edit** (same session):
+   - Hook checks session state
+   - Finds "database-verification" in skills_used
+   - Exits with code 0 (allow)
+   - No message to Claude
+
+3. **Different session**:
+   - New session ID = new state file
+   - Hook blocks again
+
+### Limitation
+
+The hook cannot detect when the skill is *actually* invoked - it just blocks once per session per skill. This means:
+
+- If Claude doesn't use the skill but makes a different edit, it won't block again
+- Trust that Claude follows the instruction
+- Future enhancement: detect actual Skill tool usage
+
+---
+
+## Performance Considerations
+
+### Target Metrics
+
+- **UserPromptSubmit**: < 100ms
+- **PreToolUse**: < 200ms
+
+### Performance Bottlenecks
+
+1. **Loading skill-rules.json** (every execution)
+   - Future: Cache in memory
+   - Future: Watch for changes, reload only when needed
+
+2. **Reading file content** (PreToolUse)
+   - Only when contentPatterns configured
+   - Only if file exists
+   - Can be slow for large files
+
+3. **Glob matching** (PreToolUse)
+   - Regex compilation for each pattern
+   - Future: Compile once, cache
+
+4. **Regex matching** (Both hooks)
+   - Intent patterns (UserPromptSubmit)
+   - Content patterns (PreToolUse)
+   - Future: Lazy compile, cache compiled regexes
+
+### Optimization Strategies
+
+**Reduce patterns:**
+- Use more specific patterns (fewer to check)
+- Combine similar patterns where possible
+
+**File path patterns:**
+- More specific = fewer files to check
+- Example: `form/src/services/**` better than `form/**`
+
+**Content patterns:**
+- Only add when truly necessary
+- Simpler regex = faster matching
+
+---
+
+**Related Files:**
+- [SKILL.md](SKILL.md) - Main skill guide
+- [TROUBLESHOOTING.md](TROUBLESHOOTING.md) - Debug hook issues
+- [SKILL_RULES_REFERENCE.md](SKILL_RULES_REFERENCE.md) - Configuration reference

.claude/skills/skill-developer/PATTERNS_LIBRARY.md

@@ -0,0 +1,152 @@
+# Common Patterns Library
+
+Ready-to-use regex and glob patterns for skill triggers. Copy and customize for your skills.
+
+---
+
+## Intent Patterns (Regex)
+
+### Feature/Endpoint Creation
+```regex
+(add|create|implement|build).*?(feature|endpoint|route|service|controller)
+```
+
+### Component Creation
+```regex
+(create|add|make|build).*?(component|UI|page|modal|dialog|form)
+```
+
+### Database Work
+```regex
+(add|create|modify|update).*?(user|table|column|field|schema|migration)
+(database|prisma).*?(change|update|query)
+```
+
+### Error Handling
+```regex
+(fix|handle|catch|debug).*?(error|exception|bug)
+(add|implement).*?(try|catch|error.*?handling)
+```
+
+### Explanation Requests
+```regex
+(how does|how do|explain|what is|describe|tell me about).*?
+```
+
+### Workflow Operations
+```regex
+(create|add|modify|update).*?(workflow|step|branch|condition)
+(debug|troubleshoot|fix).*?workflow
+```
+
+### Testing
+```regex
+(write|create|add).*?(test|spec|unit.*?test)
+```
+
+---
+
+## File Path Patterns (Glob)
+
+### Frontend
+```glob
+frontend/src/**/*.tsx        # All React components
+frontend/src/**/*.ts         # All TypeScript files
+frontend/src/components/**   # Only components directory
+```
+
+### Backend Services
+```glob
+form/src/**/*.ts            # Form service
+email/src/**/*.ts           # Email service
+users/src/**/*.ts           # Users service
+projects/src/**/*.ts        # Projects service
+```
+
+### Database
+```glob
+**/schema.prisma            # Prisma schema (anywhere)
+**/migrations/**/*.sql      # Migration files
+database/src/**/*.ts        # Database scripts
+```
+
+### Workflows
+```glob
+form/src/workflow/**/*.ts              # Workflow engine
+form/src/workflow-definitions/**/*.json # Workflow definitions
+```
+
+### Test Exclusions
+```glob
+**/*.test.ts                # TypeScript tests
+**/*.test.tsx               # React component tests
+**/*.spec.ts                # Spec files
+```
+
+---
+
+## Content Patterns (Regex)
+
+### Prisma/Database
+```regex
+import.*[Pp]risma                # Prisma imports
+PrismaService                    # PrismaService usage
+prisma\.                         # prisma.something
+\.findMany\(                     # Prisma query methods
+\.create\(
+\.update\(
+\.delete\(
+```
+
+### Controllers/Routes
+```regex
+export class.*Controller         # Controller classes
+router\.                         # Express router
+app\.(get|post|put|delete|patch) # Express app routes
+```
+
+### Error Handling
+```regex
+try\s*\{                        # Try blocks
+catch\s*\(                      # Catch blocks
+throw new                        # Throw statements
+```
+
+### React/Components
+```regex
+export.*React\.FC               # React functional components
+export default function.*       # Default function exports
+useState|useEffect              # React hooks
+```
+
+---
+
+**Usage Example:**
+
+```json
+{
+  "my-skill": {
+    "promptTriggers": {
+      "intentPatterns": [
+        "(create|add|build).*?(component|UI|page)"
+      ]
+    },
+    "fileTriggers": {
+      "pathPatterns": [
+        "frontend/src/**/*.tsx"
+      ],
+      "contentPatterns": [
+        "export.*React\\.FC",
+        "useState|useEffect"
+      ]
+    }
+  }
+}
+```
+
+---
+
+**Related Files:**
+- [SKILL.md](SKILL.md) - Main skill guide
+- [TRIGGER_TYPES.md](TRIGGER_TYPES.md) - Detailed trigger documentation
+- [SKILL_RULES_REFERENCE.md](SKILL_RULES_REFERENCE.md) - Complete schema

.claude/skills/skill-developer/SKILL.md

@@ -0,0 +1,426 @@
+---
+name: skill-developer
+description: Create and manage Claude Code skills following Anthropic best practices. Use when creating new skills, modifying skill-rules.json, understanding trigger patterns, working with hooks, debugging skill activation, or implementing progressive disclosure. Covers skill structure, YAML frontmatter, trigger types (keywords, intent patterns, file paths, content patterns), enforcement levels (block, suggest, warn), hook mechanisms (UserPromptSubmit, PreToolUse), session tracking, and the 500-line rule.
+---
+
+# Skill Developer Guide
+
+## Purpose
+
+Comprehensive guide for creating and managing skills in Claude Code with auto-activation system, following Anthropic's official best practices including the 500-line rule and progressive disclosure pattern.
+
+## When to Use This Skill
+
+Automatically activates when you mention:
+- Creating or adding skills
+- Modifying skill triggers or rules
+- Understanding how skill activation works
+- Debugging skill activation issues
+- Working with skill-rules.json
+- Hook system mechanics
+- Claude Code best practices
+- Progressive disclosure
+- YAML frontmatter
+- 500-line rule
+
+---
+
+## System Overview
+
+### Two-Hook Architecture
+
+**1. UserPromptSubmit Hook** (Proactive Suggestions)
+- **File**: `.claude/hooks/skill-activation-prompt.ts`
+- **Trigger**: BEFORE Claude sees user's prompt
+- **Purpose**: Suggest relevant skills based on keywords + intent patterns
+- **Method**: Injects formatted reminder as context (stdout → Claude's input)
+- **Use Cases**: Topic-based skills, implicit work detection
+
+**2. Stop Hook - Error Handling Reminder** (Gentle Reminders)
+- **File**: `.claude/hooks/error-handling-reminder.ts`
+- **Trigger**: AFTER Claude finishes responding
+- **Purpose**: Gentle reminder to self-assess error handling in code written
+- **Method**: Analyzes edited files for risky patterns, displays reminder if needed
+- **Use Cases**: Error handling awareness without blocking friction
+
+**Philosophy Change (2025-10-27):** We moved away from blocking PreToolUse for Sentry/error handling. Instead, use gentle post-response reminders that don't block workflow but maintain code quality awareness.
+
+### Configuration File
+
+**Location**: `.claude/skills/skill-rules.json`
+
+Defines:
+- All skills and their trigger conditions
+- Enforcement levels (block, suggest, warn)
+- File path patterns (glob)
+- Content detection patterns (regex)
+- Skip conditions (session tracking, file markers, env vars)
+
+---
+
+## Skill Types
+
+### 1. Guardrail Skills
+
+**Purpose:** Enforce critical best practices that prevent errors
+
+**Characteristics:**
+- Type: `"guardrail"`
+- Enforcement: `"block"`
+- Priority: `"critical"` or `"high"`
+- Block file edits until skill used
+- Prevent common mistakes (column names, critical errors)
+- Session-aware (don't repeat nag in same session)
+
+**Examples:**
+- `database-verification` - Verify table/column names before Prisma queries
+- `frontend-dev-guidelines` - Enforce React/TypeScript patterns
+
+**When to Use:**
+- Mistakes that cause runtime errors
+- Data integrity concerns
+- Critical compatibility issues
+
+### 2. Domain Skills
+
+**Purpose:** Provide comprehensive guidance for specific areas
+
+**Characteristics:**
+- Type: `"domain"`
+- Enforcement: `"suggest"`
+- Priority: `"high"` or `"medium"`
+- Advisory, not mandatory
+- Topic or domain-specific
+- Comprehensive documentation
+
+**Examples:**
+- `backend-dev-guidelines` - Node.js/Express/TypeScript patterns
+- `frontend-dev-guidelines` - React/TypeScript best practices
+- `error-tracking` - Sentry integration guidance
+
+**When to Use:**
+- Complex systems requiring deep knowledge
+- Best practices documentation
+- Architectural patterns
+- How-to guides
+
+---
+
+## Quick Start: Creating a New Skill
+
+### Step 1: Create Skill File
+
+**Location:** `.claude/skills/{skill-name}/SKILL.md`
+
+**Template:**
+```markdown
+---
+name: my-new-skill
+description: Brief description including keywords that trigger this skill. Mention topics, file types, and use cases. Be explicit about trigger terms.
+---
+
+# My New Skill
+
+## Purpose
+What this skill helps with
+
+## When to Use
+Specific scenarios and conditions
+
+## Key Information
+The actual guidance, documentation, patterns, examples
+```
+
+**Best Practices:**
+- ✅ **Name**: Lowercase, hyphens, gerund form (verb + -ing) preferred
+- ✅ **Description**: Include ALL trigger keywords/phrases (max 1024 chars)
+- ✅ **Content**: Under 500 lines - use reference files for details
+- ✅ **Examples**: Real code examples
+- ✅ **Structure**: Clear headings, lists, code blocks
+
+### Step 2: Add to skill-rules.json
+
+See [SKILL_RULES_REFERENCE.md](SKILL_RULES_REFERENCE.md) for complete schema.
+
+**Basic Template:**
+```json
+{
+  "my-new-skill": {
+    "type": "domain",
+    "enforcement": "suggest",
+    "priority": "medium",
+    "promptTriggers": {
+      "keywords": ["keyword1", "keyword2"],
+      "intentPatterns": ["(create|add).*?something"]
+    }
+  }
+}
+```
+
+### Step 3: Test Triggers
+
+**Test UserPromptSubmit:**
+```bash
+echo '{"session_id":"test","prompt":"your test prompt"}' | \
+  npx tsx .claude/hooks/skill-activation-prompt.ts
+```
+
+**Test PreToolUse:**
+```bash
+cat <<'EOF' | npx tsx .claude/hooks/skill-verification-guard.ts
+{"session_id":"test","tool_name":"Edit","tool_input":{"file_path":"test.ts"}}
+EOF
+```
+
+### Step 4: Refine Patterns
+
+Based on testing:
+- Add missing keywords
+- Refine intent patterns to reduce false positives
+- Adjust file path patterns
+- Test content patterns against actual files
+
+### Step 5: Follow Anthropic Best Practices
+
+✅ Keep SKILL.md under 500 lines
+✅ Use progressive disclosure with reference files
+✅ Add table of contents to reference files > 100 lines
+✅ Write detailed description with trigger keywords
+✅ Test with 3+ real scenarios before documenting
+✅ Iterate based on actual usage
+
+---
+
+## Enforcement Levels
+
+### BLOCK (Critical Guardrails)
+
+- Physically prevents Edit/Write tool execution
+- Exit code 2 from hook, stderr → Claude
+- Claude sees message and must use skill to proceed
+- **Use For**: Critical mistakes, data integrity, security issues
+
+**Example:** Database column name verification
+
+### SUGGEST (Recommended)
+
+- Reminder injected before Claude sees prompt
+- Claude is aware of relevant skills
+- Not enforced, just advisory
+- **Use For**: Domain guidance, best practices, how-to guides
+
+**Example:** Frontend development guidelines
+
+### WARN (Optional)
+
+- Low priority suggestions
+- Advisory only, minimal enforcement
+- **Use For**: Nice-to-have suggestions, informational reminders
+
+**Rarely used** - most skills are either BLOCK or SUGGEST.
+
+---
+
+## Skip Conditions & User Control
+
+### 1. Session Tracking
+
+**Purpose:** Don't nag repeatedly in same session
+
+**How it works:**
+- First edit → Hook blocks, updates session state
+- Second edit (same session) → Hook allows
+- Different session → Blocks again
+
+**State File:** `.claude/hooks/state/skills-used-{session_id}.json`
+
+### 2. File Markers
+
+**Purpose:** Permanent skip for verified files
+
+**Marker:** `// @skip-validation`
+
+**Usage:**
+```typescript
+// @skip-validation
+import { PrismaService } from './prisma';
+// This file has been manually verified
+```
+
+**NOTE:** Use sparingly - defeats the purpose if overused
+
+### 3. Environment Variables
+
+**Purpose:** Emergency disable, temporary override
+
+**Global disable:**
+```bash
+export SKIP_SKILL_GUARDRAILS=true  # Disables ALL PreToolUse blocks
+```
+
+**Skill-specific:**
+```bash
+export SKIP_DB_VERIFICATION=true
+export SKIP_ERROR_REMINDER=true
+```
+
+---
+
+## Testing Checklist
+
+When creating a new skill, verify:
+
+- [ ] Skill file created in `.claude/skills/{name}/SKILL.md`
+- [ ] Proper frontmatter with name and description
+- [ ] Entry added to `skill-rules.json`
+- [ ] Keywords tested with real prompts
+- [ ] Intent patterns tested with variations
+- [ ] File path patterns tested with actual files
+- [ ] Content patterns tested against file contents
+- [ ] Block message is clear and actionable (if guardrail)
+- [ ] Skip conditions configured appropriately
+- [ ] Priority level matches importance
+- [ ] No false positives in testing
+- [ ] No false negatives in testing
+- [ ] Performance is acceptable (<100ms or <200ms)
+- [ ] JSON syntax validated: `jq . skill-rules.json`
+- [ ] **SKILL.md under 500 lines** ⭐
+- [ ] Reference files created if needed
+- [ ] Table of contents added to files > 100 lines
+
+---
+
+## Reference Files
+
+For detailed information on specific topics, see:
+
+### [TRIGGER_TYPES.md](TRIGGER_TYPES.md)
+Complete guide to all trigger types:
+- Keyword triggers (explicit topic matching)
+- Intent patterns (implicit action detection)
+- File path triggers (glob patterns)
+- Content patterns (regex in files)
+- Best practices and examples for each
+- Common pitfalls and testing strategies
+
+### [SKILL_RULES_REFERENCE.md](SKILL_RULES_REFERENCE.md)
+Complete skill-rules.json schema:
+- Full TypeScript interface definitions
+- Field-by-field explanations
+- Complete guardrail skill example
+- Complete domain skill example
+- Validation guide and common errors
+
+### [HOOK_MECHANISMS.md](HOOK_MECHANISMS.md)
+Deep dive into hook internals:
+- UserPromptSubmit flow (detailed)
+- PreToolUse flow (detailed)
+- Exit code behavior table (CRITICAL)
+- Session state management
+- Performance considerations
+
+### [TROUBLESHOOTING.md](TROUBLESHOOTING.md)
+Comprehensive debugging guide:
+- Skill not triggering (UserPromptSubmit)
+- PreToolUse not blocking
+- False positives (too many triggers)
+- Hook not executing at all
+- Performance issues
+
+### [PATTERNS_LIBRARY.md](PATTERNS_LIBRARY.md)
+Ready-to-use pattern collection:
+- Intent pattern library (regex)
+- File path pattern library (glob)
+- Content pattern library (regex)
+- Organized by use case
+- Copy-paste ready
+
+### [ADVANCED.md](ADVANCED.md)
+Future enhancements and ideas:
+- Dynamic rule updates
+- Skill dependencies
+- Conditional enforcement
+- Skill analytics
+- Skill versioning
+
+---
+
+## Quick Reference Summary
+
+### Create New Skill (5 Steps)
+
+1. Create `.claude/skills/{name}/SKILL.md` with frontmatter
+2. Add entry to `.claude/skills/skill-rules.json`
+3. Test with `npx tsx` commands
+4. Refine patterns based on testing
+5. Keep SKILL.md under 500 lines
+
+### Trigger Types
+
+- **Keywords**: Explicit topic mentions
+- **Intent**: Implicit action detection
+- **File Paths**: Location-based activation
+- **Content**: Technology-specific detection
+
+See [TRIGGER_TYPES.md](TRIGGER_TYPES.md) for complete details.
+
+### Enforcement
+
+- **BLOCK**: Exit code 2, critical only
+- **SUGGEST**: Inject context, most common
+- **WARN**: Advisory, rarely used
+
+### Skip Conditions
+
+- **Session tracking**: Automatic (prevents repeated nags)
+- **File markers**: `// @skip-validation` (permanent skip)
+- **Env vars**: `SKIP_SKILL_GUARDRAILS` (emergency disable)
+
+### Anthropic Best Practices
+
+✅ **500-line rule**: Keep SKILL.md under 500 lines
+✅ **Progressive disclosure**: Use reference files for details
+✅ **Table of contents**: Add to reference files > 100 lines
+✅ **One level deep**: Don't nest references deeply
+✅ **Rich descriptions**: Include all trigger keywords (max 1024 chars)
+✅ **Test first**: Build 3+ evaluations before extensive documentation
+✅ **Gerund naming**: Prefer verb + -ing (e.g., "processing-pdfs")
+
+### Troubleshoot
+
+Test hooks manually:
+```bash
+# UserPromptSubmit
+echo '{"prompt":"test"}' | npx tsx .claude/hooks/skill-activation-prompt.ts
+
+# PreToolUse
+cat <<'EOF' | npx tsx .claude/hooks/skill-verification-guard.ts
+{"tool_name":"Edit","tool_input":{"file_path":"test.ts"}}
+EOF
+```
+
+See [TROUBLESHOOTING.md](TROUBLESHOOTING.md) for complete debugging guide.
+
+---
+
+## Related Files
+
+**Configuration:**
+- `.claude/skills/skill-rules.json` - Master configuration
+- `.claude/hooks/state/` - Session tracking
+- `.claude/settings.json` - Hook registration
+
+**Hooks:**
+- `.claude/hooks/skill-activation-prompt.ts` - UserPromptSubmit
+- `.claude/hooks/error-handling-reminder.ts` - Stop event (gentle reminders)
+
+**All Skills:**
+- `.claude/skills/*/SKILL.md` - Skill content files
+
+---
+
+**Skill Status**: COMPLETE - Restructured following Anthropic best practices ✅
+**Line Count**: < 500 (following 500-line rule) ✅
+**Progressive Disclosure**: Reference files for detailed information ✅
+
+**Next**: Create more skills, refine patterns based on usage

.claude/skills/skill-developer/SKILL_RULES_REFERENCE.md

@@ -0,0 +1,315 @@
+# skill-rules.json - Complete Reference
+
+Complete schema and configuration reference for `.claude/skills/skill-rules.json`.
+
+## Table of Contents
+
+- [File Location](#file-location)
+- [Complete TypeScript Schema](#complete-typescript-schema)
+- [Field Guide](#field-guide)
+- [Example: Guardrail Skill](#example-guardrail-skill)
+- [Example: Domain Skill](#example-domain-skill)
+- [Validation](#validation)
+
+---
+
+## File Location
+
+**Path:** `.claude/skills/skill-rules.json`
+
+This JSON file defines all skills and their trigger conditions for the auto-activation system.
+
+---
+
+## Complete TypeScript Schema
+
+```typescript
+interface SkillRules {
+    version: string;
+    skills: Record<string, SkillRule>;
+}
+
+interface SkillRule {
+    type: 'guardrail' | 'domain';
+    enforcement: 'block' | 'suggest' | 'warn';
+    priority: 'critical' | 'high' | 'medium' | 'low';
+
+    promptTriggers?: {
+        keywords?: string[];
+        intentPatterns?: string[];  // Regex strings
+    };
+
+    fileTriggers?: {
+        pathPatterns: string[];     // Glob patterns
+        pathExclusions?: string[];  // Glob patterns
+        contentPatterns?: string[]; // Regex strings
+        createOnly?: boolean;       // Only trigger on file creation
+    };
+
+    blockMessage?: string;  // For guardrails, {file_path} placeholder
+
+    skipConditions?: {
+        sessionSkillUsed?: boolean;      // Skip if used in session
+        fileMarkers?: string[];          // e.g., ["@skip-validation"]
+        envOverride?: string;            // e.g., "SKIP_DB_VERIFICATION"
+    };
+}
+```
+
+---
+
+## Field Guide
+
+### Top Level
+
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| `version` | string | Yes | Schema version (currently "1.0") |
+| `skills` | object | Yes | Map of skill name → SkillRule |
+
+### SkillRule Fields
+
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| `type` | string | Yes | "guardrail" (enforced) or "domain" (advisory) |
+| `enforcement` | string | Yes | "block" (PreToolUse), "suggest" (UserPromptSubmit), or "warn" |
+| `priority` | string | Yes | "critical", "high", "medium", or "low" |
+| `promptTriggers` | object | Optional | Triggers for UserPromptSubmit hook |
+| `fileTriggers` | object | Optional | Triggers for PreToolUse hook |
+| `blockMessage` | string | Optional* | Required if enforcement="block". Use `{file_path}` placeholder |
+| `skipConditions` | object | Optional | Escape hatches and session tracking |
+
+*Required for guardrails
+
+### promptTriggers Fields
+
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| `keywords` | string[] | Optional | Exact substring matches (case-insensitive) |
+| `intentPatterns` | string[] | Optional | Regex patterns for intent detection |
+
+### fileTriggers Fields
+
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| `pathPatterns` | string[] | Yes* | Glob patterns for file paths |
+| `pathExclusions` | string[] | Optional | Glob patterns to exclude (e.g., test files) |
+| `contentPatterns` | string[] | Optional | Regex patterns to match file content |
+| `createOnly` | boolean | Optional | Only trigger when creating new files |
+
+*Required if fileTriggers is present
+
+### skipConditions Fields
+
+| Field | Type | Required | Description |
+|-------|------|----------|-------------|
+| `sessionSkillUsed` | boolean | Optional | Skip if skill already used this session |
+| `fileMarkers` | string[] | Optional | Skip if file contains comment marker |
+| `envOverride` | string | Optional | Environment variable name to disable skill |
+
+---
+
+## Example: Guardrail Skill
+
+Complete example of a blocking guardrail skill with all features:
+
+```json
+{
+  "database-verification": {
+    "type": "guardrail",
+    "enforcement": "block",
+    "priority": "critical",
+
+    "promptTriggers": {
+      "keywords": [
+        "prisma",
+        "database",
+        "table",
+        "column",
+        "schema",
+        "query",
+        "migration"
+      ],
+      "intentPatterns": [
+        "(add|create|implement).*?(user|login|auth|tracking|feature)",
+        "(modify|update|change).*?(table|column|schema|field)",
+        "database.*?(change|update|modify|migration)"
+      ]
+    },
+
+    "fileTriggers": {
+      "pathPatterns": [
+        "**/schema.prisma",
+        "**/migrations/**/*.sql",
+        "database/src/**/*.ts",
+        "form/src/**/*.ts",
+        "email/src/**/*.ts",
+        "users/src/**/*.ts",
+        "projects/src/**/*.ts",
+        "utilities/src/**/*.ts"
+      ],
+      "pathExclusions": [
+        "**/*.test.ts",
+        "**/*.spec.ts"
+      ],
+      "contentPatterns": [
+        "import.*[Pp]risma",
+        "PrismaService",
+        "prisma\\.",
+        "\\.findMany\\(",
+        "\\.findUnique\\(",
+        "\\.findFirst\\(",
+        "\\.create\\(",
+        "\\.createMany\\(",
+        "\\.update\\(",
+        "\\.updateMany\\(",
+        "\\.upsert\\(",
+        "\\.delete\\(",
+        "\\.deleteMany\\("
+      ]
+    },
+
+    "blockMessage": "⚠️ BLOCKED - Database Operation Detected\n\n📋 REQUIRED ACTION:\n1. Use Skill tool: 'database-verification'\n2. Verify ALL table and column names against schema\n3. Check database structure with DESCRIBE commands\n4. Then retry this edit\n\nReason: Prevent column name errors in Prisma queries\nFile: {file_path}\n\n💡 TIP: Add '// @skip-validation' comment to skip future checks",
+
+    "skipConditions": {
+      "sessionSkillUsed": true,
+      "fileMarkers": [
+        "@skip-validation"
+      ],
+      "envOverride": "SKIP_DB_VERIFICATION"
+    }
+  }
+}
+```
+
+### Key Points for Guardrails
+
+1. **type**: Must be "guardrail"
+2. **enforcement**: Must be "block"
+3. **priority**: Usually "critical" or "high"
+4. **blockMessage**: Required, clear actionable steps
+5. **skipConditions**: Session tracking prevents repeated nagging
+6. **fileTriggers**: Usually has both path and content patterns
+7. **contentPatterns**: Catch actual usage of technology
+
+---
+
+## Example: Domain Skill
+
+Complete example of a suggestion-based domain skill:
+
+```json
+{
+  "project-catalog-developer": {
+    "type": "domain",
+    "enforcement": "suggest",
+    "priority": "high",
+
+    "promptTriggers": {
+      "keywords": [
+        "layout",
+        "layout system",
+        "grid",
+        "grid layout",
+        "toolbar",
+        "column",
+        "cell editor",
+        "cell renderer",
+        "submission",
+        "submissions",
+        "blog dashboard",
+        "datagrid",
+        "data grid",
+        "CustomToolbar",
+        "GridLayoutDialog",
+        "useGridLayout",
+        "auto-save",
+        "column order",
+        "column width",
+        "filter",
+        "sort"
+      ],
+      "intentPatterns": [
+        "(how does|how do|explain|what is|describe).*?(layout|grid|toolbar|column|submission|catalog)",
+        "(add|create|modify|change).*?(toolbar|column|cell|editor|renderer)",
+        "blog dashboard.*?"
+      ]
+    },
+
+    "fileTriggers": {
+      "pathPatterns": [
+        "frontend/src/features/submissions/**/*.tsx",
+        "frontend/src/features/submissions/**/*.ts"
+      ],
+      "pathExclusions": [
+        "**/*.test.tsx",
+        "**/*.test.ts"
+      ]
+    }
+  }
+}
+```
+
+### Key Points for Domain Skills
+
+1. **type**: Must be "domain"
+2. **enforcement**: Usually "suggest"
+3. **priority**: "high" or "medium"
+4. **blockMessage**: Not needed (doesn't block)
+5. **skipConditions**: Optional (less critical)
+6. **promptTriggers**: Usually has extensive keywords
+7. **fileTriggers**: May have only path patterns (content less important)
+
+---
+
+## Validation
+
+### Check JSON Syntax
+
+```bash
+cat .claude/skills/skill-rules.json | jq .
+```
+
+If valid, jq will pretty-print the JSON. If invalid, it will show the error.
+
+### Common JSON Errors
+
+**Trailing comma:**
+```json
+{
+  "keywords": ["one", "two",]  // ❌ Trailing comma
+}
+```
+
+**Missing quotes:**
+```json
+{
+  type: "guardrail"  // ❌ Missing quotes on key
+}
+```
+
+**Single quotes (invalid JSON):**
+```json
+{
+  'type': 'guardrail'  // ❌ Must use double quotes
+}
+```
+
+### Validation Checklist
+
+- [ ] JSON syntax valid (use `jq`)
+- [ ] All skill names match SKILL.md filenames
+- [ ] Guardrails have `blockMessage`
+- [ ] Block messages use `{file_path}` placeholder
+- [ ] Intent patterns are valid regex (test on regex101.com)
+- [ ] File path patterns use correct glob syntax
+- [ ] Content patterns escape special characters
+- [ ] Priority matches enforcement level
+- [ ] No duplicate skill names
+
+---
+
+**Related Files:**
+- [SKILL.md](SKILL.md) - Main skill guide
+- [TRIGGER_TYPES.md](TRIGGER_TYPES.md) - Complete trigger documentation
+- [TROUBLESHOOTING.md](TROUBLESHOOTING.md) - Debugging configuration issues

.claude/skills/skill-developer/TRIGGER_TYPES.md

@@ -0,0 +1,305 @@
+# Trigger Types - Complete Guide
+
+Complete reference for configuring skill triggers in Claude Code's skill auto-activation system.
+
+## Table of Contents
+
+- [Keyword Triggers (Explicit)](#keyword-triggers-explicit)
+- [Intent Pattern Triggers (Implicit)](#intent-pattern-triggers-implicit)
+- [File Path Triggers](#file-path-triggers)
+- [Content Pattern Triggers](#content-pattern-triggers)
+- [Best Practices Summary](#best-practices-summary)
+
+---
+
+## Keyword Triggers (Explicit)
+
+### How It Works
+
+Case-insensitive substring matching in user's prompt.
+
+### Use For
+
+Topic-based activation where user explicitly mentions the subject.
+
+### Configuration
+
+```json
+"promptTriggers": {
+  "keywords": ["layout", "grid", "toolbar", "submission"]
+}
+```
+
+### Example
+
+- User prompt: "how does the **layout** system work?"
+- Matches: "layout" keyword
+- Activates: `project-catalog-developer`
+
+### Best Practices
+
+- Use specific, unambiguous terms
+- Include common variations ("layout", "layout system", "grid layout")
+- Avoid overly generic words ("system", "work", "create")
+- Test with real prompts
+
+---
+
+## Intent Pattern Triggers (Implicit)
+
+### How It Works
+
+Regex pattern matching to detect user's intent even when they don't mention the topic explicitly.
+
+### Use For
+
+Action-based activation where user describes what they want to do rather than the specific topic.
+
+### Configuration
+
+```json
+"promptTriggers": {
+  "intentPatterns": [
+    "(create|add|implement).*?(feature|endpoint)",
+    "(how does|explain).*?(layout|workflow)"
+  ]
+}
+```
+
+### Examples
+
+**Database Work:**
+- User prompt: "add user tracking feature"
+- Matches: `(add).*?(feature)`
+- Activates: `database-verification`, `error-tracking`
+
+**Component Creation:**
+- User prompt: "create a dashboard widget"
+- Matches: `(create).*?(component)` (if component in pattern)
+- Activates: `frontend-dev-guidelines`
+
+### Best Practices
+
+- Capture common action verbs: `(create|add|modify|build|implement)`
+- Include domain-specific nouns: `(feature|endpoint|component|workflow)`
+- Use non-greedy matching: `.*?` instead of `.*`
+- Test patterns thoroughly with regex tester (https://regex101.com/)
+- Don't make patterns too broad (causes false positives)
+- Don't make patterns too specific (causes false negatives)
+
+### Common Pattern Examples
+
+```regex
+# Database Work
+(add|create|implement).*?(user|login|auth|feature)
+
+# Explanations
+(how does|explain|what is|describe).*?
+
+# Frontend Work
+(create|add|make|build).*?(component|UI|page|modal|dialog)
+
+# Error Handling
+(fix|handle|catch|debug).*?(error|exception|bug)
+
+# Workflow Operations
+(create|add|modify).*?(workflow|step|branch|condition)
+```
+
+---
+
+## File Path Triggers
+
+### How It Works
+
+Glob pattern matching against the file path being edited.
+
+### Use For
+
+Domain/area-specific activation based on file location in the project.
+
+### Configuration
+
+```json
+"fileTriggers": {
+  "pathPatterns": [
+    "frontend/src/**/*.tsx",
+    "form/src/**/*.ts"
+  ],
+  "pathExclusions": [
+    "**/*.test.ts",
+    "**/*.spec.ts"
+  ]
+}
+```
+
+### Glob Pattern Syntax
+
+- `**` = Any number of directories (including zero)
+- `*` = Any characters within a directory name
+- Examples:
+  - `frontend/src/**/*.tsx` = All .tsx files in frontend/src and subdirs
+  - `**/schema.prisma` = schema.prisma anywhere in project
+  - `form/src/**/*.ts` = All .ts files in form/src subdirs
+
+### Example
+
+- File being edited: `frontend/src/components/Dashboard.tsx`
+- Matches: `frontend/src/**/*.tsx`
+- Activates: `frontend-dev-guidelines`
+
+### Best Practices
+
+- Be specific to avoid false positives
+- Use exclusions for test files: `**/*.test.ts`
+- Consider subdirectory structure
+- Test patterns with actual file paths
+- Use narrower patterns when possible: `form/src/services/**` not `form/**`
+
+### Common Path Patterns
+
+```glob
+# Frontend
+frontend/src/**/*.tsx        # All React components
+frontend/src/**/*.ts         # All TypeScript files
+frontend/src/components/**   # Only components directory
+
+# Backend Services
+form/src/**/*.ts            # Form service
+email/src/**/*.ts           # Email service
+users/src/**/*.ts           # Users service
+
+# Database
+**/schema.prisma            # Prisma schema (anywhere)
+**/migrations/**/*.sql      # Migration files
+database/src/**/*.ts        # Database scripts
+
+# Workflows
+form/src/workflow/**/*.ts              # Workflow engine
+form/src/workflow-definitions/**/*.json # Workflow definitions
+
+# Test Exclusions
+**/*.test.ts                # TypeScript tests
+**/*.test.tsx               # React component tests
+**/*.spec.ts                # Spec files
+```
+
+---
+
+## Content Pattern Triggers
+
+### How It Works
+
+Regex pattern matching against the file's actual content (what's inside the file).
+
+### Use For
+
+Technology-specific activation based on what the code imports or uses (Prisma, controllers, specific libraries).
+
+### Configuration
+
+```json
+"fileTriggers": {
+  "contentPatterns": [
+    "import.*[Pp]risma",
+    "PrismaService",
+    "\\.findMany\\(",
+    "\\.create\\("
+  ]
+}
+```
+
+### Examples
+
+**Prisma Detection:**
+- File contains: `import { PrismaService } from '@project/database'`
+- Matches: `import.*[Pp]risma`
+- Activates: `database-verification`
+
+**Controller Detection:**
+- File contains: `export class UserController {`
+- Matches: `export class.*Controller`
+- Activates: `error-tracking`
+
+### Best Practices
+
+- Match imports: `import.*[Pp]risma` (case-insensitive with [Pp])
+- Escape special regex chars: `\\.findMany\\(` not `.findMany(`
+- Patterns use case-insensitive flag
+- Test against real file content
+- Make patterns specific enough to avoid false matches
+
+### Common Content Patterns
+
+```regex
+# Prisma/Database
+import.*[Pp]risma                # Prisma imports
+PrismaService                    # PrismaService usage
+prisma\.                         # prisma.something
+\.findMany\(                     # Prisma query methods
+\.create\(
+\.update\(
+\.delete\(
+
+# Controllers/Routes
+export class.*Controller         # Controller classes
+router\.                         # Express router
+app\.(get|post|put|delete|patch) # Express app routes
+
+# Error Handling
+try\s*\{                        # Try blocks
+catch\s*\(                      # Catch blocks
+throw new                        # Throw statements
+
+# React/Components
+export.*React\.FC               # React functional components
+export default function.*       # Default function exports
+useState|useEffect              # React hooks
+```
+
+---
+
+## Best Practices Summary
+
+### DO:
+✅ Use specific, unambiguous keywords
+✅ Test all patterns with real examples
+✅ Include common variations
+✅ Use non-greedy regex: `.*?`
+✅ Escape special characters in content patterns
+✅ Add exclusions for test files
+✅ Make file path patterns narrow and specific
+
+### DON'T:
+❌ Use overly generic keywords ("system", "work")
+❌ Make intent patterns too broad (false positives)
+❌ Make patterns too specific (false negatives)
+❌ Forget to test with regex tester (https://regex101.com/)
+❌ Use greedy regex: `.*` instead of `.*?`
+❌ Match too broadly in file paths
+
+### Testing Your Triggers
+
+**Test keyword/intent triggers:**
+```bash
+echo '{"session_id":"test","prompt":"your test prompt"}' | \
+  npx tsx .claude/hooks/skill-activation-prompt.ts
+```
+
+**Test file path/content triggers:**
+```bash
+cat <<'EOF' | npx tsx .claude/hooks/skill-verification-guard.ts
+{
+  "session_id": "test",
+  "tool_name": "Edit",
+  "tool_input": {"file_path": "/path/to/test/file.ts"}
+}
+EOF
+```
+
+---
+
+**Related Files:**
+- [SKILL.md](SKILL.md) - Main skill guide
+- [SKILL_RULES_REFERENCE.md](SKILL_RULES_REFERENCE.md) - Complete skill-rules.json schema
+- [PATTERNS_LIBRARY.md](PATTERNS_LIBRARY.md) - Ready-to-use pattern library

.claude/skills/skill-developer/TROUBLESHOOTING.md

@@ -0,0 +1,514 @@
+# Troubleshooting - Skill Activation Issues
+
+Complete debugging guide for skill activation problems.
+
+## Table of Contents
+
+- [Skill Not Triggering](#skill-not-triggering)
+  - [UserPromptSubmit Not Suggesting](#userpromptsubmit-not-suggesting)
+  - [PreToolUse Not Blocking](#pretooluse-not-blocking)
+- [False Positives](#false-positives)
+- [Hook Not Executing](#hook-not-executing)
+- [Performance Issues](#performance-issues)
+
+---
+
+## Skill Not Triggering
+
+### UserPromptSubmit Not Suggesting
+
+**Symptoms:** Ask a question, but no skill suggestion appears in output.
+
+**Common Causes:**
+
+####  1. Keywords Don't Match
+
+**Check:**
+- Look at `promptTriggers.keywords` in skill-rules.json
+- Are the keywords actually in your prompt?
+- Remember: case-insensitive substring matching
+
+**Example:**
+```json
+"keywords": ["layout", "grid"]
+```
+- "how does the layout work?" → ✅ Matches "layout"
+- "how does the grid system work?" → ✅ Matches "grid"
+- "how do layouts work?" → ✅ Matches "layout"
+- "how does it work?" → ❌ No match
+
+**Fix:** Add more keyword variations to skill-rules.json
+
+#### 2. Intent Patterns Too Specific
+
+**Check:**
+- Look at `promptTriggers.intentPatterns`
+- Test regex at https://regex101.com/
+- May need broader patterns
+
+**Example:**
+```json
+"intentPatterns": [
+  "(create|add).*?(database.*?table)"  // Too specific
+]
+```
+- "create a database table" → ✅ Matches
+- "add new table" → ❌ Doesn't match (missing "database")
+
+**Fix:** Broaden the pattern:
+```json
+"intentPatterns": [
+  "(create|add).*?(table|database)"  // Better
+]
+```
+
+#### 3. Typo in Skill Name
+
+**Check:**
+- Skill name in SKILL.md frontmatter
+- Skill name in skill-rules.json
+- Must match exactly
+
+**Example:**
+```yaml
+# SKILL.md
+name: project-catalog-developer
+```
+```json
+// skill-rules.json
+"project-catalogue-developer": {  // ❌ Typo: catalogue vs catalog
+  ...
+}
+```
+
+**Fix:** Make names match exactly
+
+#### 4. JSON Syntax Error
+
+**Check:**
+```bash
+cat .claude/skills/skill-rules.json | jq .
+```
+
+If invalid JSON, jq will show the error.
+
+**Common errors:**
+- Trailing commas
+- Missing quotes
+- Single quotes instead of double
+- Unescaped characters in strings
+
+**Fix:** Correct JSON syntax, validate with jq
+
+#### Debug Command
+
+Test the hook manually:
+
+```bash
+echo '{"session_id":"debug","prompt":"your test prompt here"}' | \
+  npx tsx .claude/hooks/skill-activation-prompt.ts
+```
+
+Expected: Your skill should appear in the output.
+
+---
+
+### PreToolUse Not Blocking
+
+**Symptoms:** Edit a file that should trigger a guardrail, but no block occurs.
+
+**Common Causes:**
+
+#### 1. File Path Doesn't Match Patterns
+
+**Check:**
+- File path being edited
+- `fileTriggers.pathPatterns` in skill-rules.json
+- Glob pattern syntax
+
+**Example:**
+```json
+"pathPatterns": [
+  "frontend/src/**/*.tsx"
+]
+```
+- Editing: `frontend/src/components/Dashboard.tsx` → ✅ Matches
+- Editing: `frontend/tests/Dashboard.test.tsx` → ✅ Matches (add exclusion!)
+- Editing: `backend/src/app.ts` → ❌ Doesn't match
+
+**Fix:** Adjust glob patterns or add the missing path
+
+#### 2. Excluded by pathExclusions
+
+**Check:**
+- Are you editing a test file?
+- Look at `fileTriggers.pathExclusions`
+
+**Example:**
+```json
+"pathExclusions": [
+  "**/*.test.ts",
+  "**/*.spec.ts"
+]
+```
+- Editing: `services/user.test.ts` → ❌ Excluded
+- Editing: `services/user.ts` → ✅ Not excluded
+
+**Fix:** If test exclusion too broad, narrow it or remove
+
+#### 3. Content Pattern Not Found
+
+**Check:**
+- Does the file actually contain the pattern?
+- Look at `fileTriggers.contentPatterns`
+- Is the regex correct?
+
+**Example:**
+```json
+"contentPatterns": [
+  "import.*[Pp]risma"
+]
+```
+- File has: `import { PrismaService } from './prisma'` → ✅ Matches
+- File has: `import { Database } from './db'` → ❌ Doesn't match
+
+**Debug:**
+```bash
+# Check if pattern exists in file
+grep -i "prisma" path/to/file.ts
+```
+
+**Fix:** Adjust content patterns or add missing imports
+
+#### 4. Session Already Used Skill
+
+**Check session state:**
+```bash
+ls .claude/hooks/state/
+cat .claude/hooks/state/skills-used-{session-id}.json
+```
+
+**Example:**
+```json
+{
+  "skills_used": ["database-verification"],
+  "files_verified": []
+}
+```
+
+If the skill is in `skills_used`, it won't block again in this session.
+
+**Fix:** Delete the state file to reset:
+```bash
+rm .claude/hooks/state/skills-used-{session-id}.json
+```
+
+#### 5. File Marker Present
+
+**Check file for skip marker:**
+```bash
+grep "@skip-validation" path/to/file.ts
+```
+
+If found, the file is permanently skipped.
+
+**Fix:** Remove the marker if verification is needed again
+
+#### 6. Environment Variable Override
+
+**Check:**
+```bash
+echo $SKIP_DB_VERIFICATION
+echo $SKIP_SKILL_GUARDRAILS
+```
+
+If set, the skill is disabled.
+
+**Fix:** Unset the environment variable:
+```bash
+unset SKIP_DB_VERIFICATION
+```
+
+#### Debug Command
+
+Test the hook manually:
+
+```bash
+cat <<'EOF' | npx tsx .claude/hooks/skill-verification-guard.ts 2>&1
+{
+  "session_id": "debug",
+  "tool_name": "Edit",
+  "tool_input": {"file_path": "/root/git/your-project/form/src/services/user.ts"}
+}
+EOF
+echo "Exit code: $?"
+```
+
+Expected:
+- Exit code 2 + stderr message if should block
+- Exit code 0 + no output if should allow
+
+---
+
+## False Positives
+
+**Symptoms:** Skill triggers when it shouldn't.
+
+**Common Causes & Solutions:**
+
+### 1. Keywords Too Generic
+
+**Problem:**
+```json
+"keywords": ["user", "system", "create"]  // Too broad
+```
+- Triggers on: "user manual", "file system", "create directory"
+
+**Solution:** Make keywords more specific
+```json
+"keywords": [
+  "user authentication",
+  "user tracking",
+  "create feature"
+]
+```
+
+### 2. Intent Patterns Too Broad
+
+**Problem:**
+```json
+"intentPatterns": [
+  "(create)"  // Matches everything with "create"
+]
+```
+- Triggers on: "create file", "create folder", "create account"
+
+**Solution:** Add context to patterns
+```json
+"intentPatterns": [
+  "(create|add).*?(database|table|feature)"  // More specific
+]
+```
+
+**Advanced:** Use negative lookaheads to exclude
+```regex
+(create)(?!.*test).*?(feature)  // Don't match if "test" appears
+```
+
+### 3. File Paths Too Generic
+
+**Problem:**
+```json
+"pathPatterns": [
+  "form/**"  // Matches everything in form/
+]
+```
+- Triggers on: test files, config files, everything
+
+**Solution:** Use narrower patterns
+```json
+"pathPatterns": [
+  "form/src/services/**/*.ts",  // Only service files
+  "form/src/controllers/**/*.ts"
+]
+```
+
+### 4. Content Patterns Catching Unrelated Code
+
+**Problem:**
+```json
+"contentPatterns": [
+  "Prisma"  // Matches in comments, strings, etc.
+]
+```
+- Triggers on: `// Don't use Prisma here`
+- Triggers on: `const note = "Prisma is cool"`
+
+**Solution:** Make patterns more specific
+```json
+"contentPatterns": [
+  "import.*[Pp]risma",        // Only imports
+  "PrismaService\\.",         // Only actual usage
+  "prisma\\.(findMany|create)" // Specific methods
+]
+```
+
+### 5. Adjust Enforcement Level
+
+**Last resort:** If false positives are frequent:
+
+```json
+{
+  "enforcement": "block"  // Change to "suggest"
+}
+```
+
+This makes it advisory instead of blocking.
+
+---
+
+## Hook Not Executing
+
+**Symptoms:** Hook doesn't run at all - no suggestion, no block.
+
+**Common Causes:**
+
+### 1. Hook Not Registered
+
+**Check `.claude/settings.json`:**
+```bash
+cat .claude/settings.json | jq '.hooks.UserPromptSubmit'
+cat .claude/settings.json | jq '.hooks.PreToolUse'
+```
+
+Expected: Hook entries present
+
+**Fix:** Add missing hook registration:
+```json
+{
+  "hooks": {
+    "UserPromptSubmit": [
+      {
+        "hooks": [
+          {
+            "type": "command",
+            "command": "$CLAUDE_PROJECT_DIR/.claude/hooks/skill-activation-prompt.sh"
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
+### 2. Bash Wrapper Not Executable
+
+**Check:**
+```bash
+ls -l .claude/hooks/*.sh
+```
+
+Expected: `-rwxr-xr-x` (executable)
+
+**Fix:**
+```bash
+chmod +x .claude/hooks/*.sh
+```
+
+### 3. Incorrect Shebang
+
+**Check:**
+```bash
+head -1 .claude/hooks/skill-activation-prompt.sh
+```
+
+Expected: `#!/bin/bash`
+
+**Fix:** Add correct shebang to first line
+
+### 4. npx/tsx Not Available
+
+**Check:**
+```bash
+npx tsx --version
+```
+
+Expected: Version number
+
+**Fix:** Install dependencies:
+```bash
+cd .claude/hooks
+npm install
+```
+
+### 5. TypeScript Compilation Error
+
+**Check:**
+```bash
+cd .claude/hooks
+npx tsc --noEmit skill-activation-prompt.ts
+```
+
+Expected: No output (no errors)
+
+**Fix:** Correct TypeScript syntax errors
+
+---
+
+## Performance Issues
+
+**Symptoms:** Hooks are slow, noticeable delay before prompt/edit.
+
+**Common Causes:**
+
+### 1. Too Many Patterns
+
+**Check:**
+- Count patterns in skill-rules.json
+- Each pattern = regex compilation + matching
+
+**Solution:** Reduce patterns
+- Combine similar patterns
+- Remove redundant patterns
+- Use more specific patterns (faster matching)
+
+### 2. Complex Regex
+
+**Problem:**
+```regex
+(create|add|modify|update|implement|build).*?(feature|endpoint|route|service|controller|component|UI|page)
+```
+- Long alternations = slow
+
+**Solution:** Simplify
+```regex
+(create|add).*?(feature|endpoint)  // Fewer alternatives
+```
+
+### 3. Too Many Files Checked
+
+**Problem:**
+```json
+"pathPatterns": [
+  "**/*.ts"  // Checks ALL TypeScript files
+]
+```
+
+**Solution:** Be more specific
+```json
+"pathPatterns": [
+  "form/src/services/**/*.ts",  // Only specific directory
+  "form/src/controllers/**/*.ts"
+]
+```
+
+### 4. Large Files
+
+Content pattern matching reads entire file - slow for large files.
+
+**Solution:**
+- Only use content patterns when necessary
+- Consider file size limits (future enhancement)
+
+### Measure Performance
+
+```bash
+# UserPromptSubmit
+time echo '{"prompt":"test"}' | npx tsx .claude/hooks/skill-activation-prompt.ts
+
+# PreToolUse
+time cat <<'EOF' | npx tsx .claude/hooks/skill-verification-guard.ts
+{"tool_name":"Edit","tool_input":{"file_path":"test.ts"}}
+EOF
+```
+
+**Target metrics:**
+- UserPromptSubmit: < 100ms
+- PreToolUse: < 200ms
+
+---
+
+**Related Files:**
+- [SKILL.md](SKILL.md) - Main skill guide
+- [HOOK_MECHANISMS.md](HOOK_MECHANISMS.md) - How hooks work
+- [SKILL_RULES_REFERENCE.md](SKILL_RULES_REFERENCE.md) - Configuration reference

.claude/skills/skill-rules.json

@@ -0,0 +1,84 @@
+{
+  "version": "1.0",
+  "description": "Skill activation triggers for Claude Code. Controls when skills automatically suggest or block actions.",
+  "skills": {
+    "skill-developer": {
+      "type": "domain",
+      "enforcement": "suggest",
+      "priority": "high",
+      "description": "Meta-skill for creating and managing Claude Code skills",
+      "promptTriggers": {
+        "keywords": [
+          "skill system",
+          "create skill",
+          "add skill",
+          "skill triggers",
+          "skill rules",
+          "hook system",
+          "skill development",
+          "skill-rules.json"
+        ],
+        "intentPatterns": [
+          "(how do|how does|explain).*?skill",
+          "(create|add|modify|build).*?skill",
+          "skill.*?(work|trigger|activate|system)"
+        ]
+      }
+    },
+    "backend-dev-guidelines": {
+      "type": "domain",
+      "enforcement": "suggest",
+      "priority": "high",
+      "description": "Backend development patterns for Node.js/NextJS/Express/TypeScript",
+      "promptTriggers": {
+        "keywords": [
+          "backend",
+          "backend development",
+          "microservice",
+          "controller",
+          "service",
+          "repository",
+          "route",
+          "routing",
+          "express",
+          "API",
+          "endpoint",
+          "middleware",
+          "validation",
+          "Zod",
+          "Prisma",
+          "database access",
+          "BaseController",
+          "dependency injection",
+          "unifiedConfig",
+          "configuration"
+        ],
+        "intentPatterns": [
+          "(create|add|implement|build).*?(route|endpoint|API|controller|service|repository)",
+          "(fix|handle|debug).*?(error|exception|backend)",
+          "(add|implement).*?(middleware|validation|error.*?handling)",
+          "(organize|structure|refactor).*?(backend|service|API)",
+          "(how to|best practice).*?(backend|route|controller|service)"
+        ]
+      },
+      "fileTriggers": {
+        "pathPatterns": [
+          "worker/src/**/*.ts",
+          "packages/shared/src/**/*.ts",
+          "web/src/**/*.ts"
+        ],
+        "pathExclusions": [
+          "**/*.test.ts",
+          "**/*.spec.ts"
+        ],
+        "contentPatterns": [
+          "router\\.",
+          "app\\.(get|post|put|delete|patch)",
+          "export.*Controller",
+          "export.*Service",
+          "prisma\\."
+        ]
+      }
+    }
+  }
+}

.codespellrc

@@ -1,4 +1,4 @@
 [codespell]
 skip = .git,*.pdf,*.svg,package-lock.json,*.prisma,pnpm-lock.yaml
-ignore-words-list = afterall,vertx,notIn,alue
+ignore-words-list = afterall,vertx,notIn,alue,allTime
 

.cursor/Dockerfile

@@ -1,54 +0,0 @@
-FROM node:20
-
-# ---------- System packages --------------------------------------------------
-# The buildpack-deps base already ships git, build-essential, python, etc.
-# Add a few extra tools handy during Langfuse development.
-RUN apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
-      openssl \
-      wget \
-      curl \
-      ca-certificates \
-      postgresql-client \
-      redis-tools \
-      less nano \
-      sudo \
-    && rm -rf /var/lib/apt/lists/*
-
-# ---------- Docker -----------------------------------------------------------
-# Install Docker for background agents that need container capabilities
-RUN curl -fsSL https://get.docker.com -o get-docker.sh && \
-    sh get-docker.sh && \
-    rm get-docker.sh
-
-# ---------- pnpm -------------------------------------------------------------
-# Langfuse monorepo relies on pnpm 9.5.0 (see CONTRIBUTING.md)
-ENV PNPM_HOME="/pnpm"
-ENV PATH="$PNPM_HOME:$PATH"
-RUN corepack enable && \
-    corepack prepare pnpm@9.5.0 --activate
-
-# ---------- golang-migrate ----------------------------------------------------
-# CLI used for database migrations during development.
-ENV MIGRATE_VERSION=4.18.3
-RUN wget -qO- "https://github.com/golang-migrate/migrate/releases/download/v${MIGRATE_VERSION}/migrate.linux-amd64.tar.gz" \
-    | tar -xz -C /usr/local/bin && \
-    chmod +x /usr/local/bin/migrate
-
-# ---------- Non-root user -----------------------------------------------------
-# Create non-root user with sudo privileges and docker group access
-RUN useradd -ms /bin/bash ubuntu && \
-    usermod -aG sudo ubuntu && \
-    usermod -aG docker ubuntu && \
-    echo "ubuntu ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers
-
-# Pre-create pnpm store and set correct ownership to avoid first-run cost & permission issues
-RUN pnpm store path > /dev/null && \
-    chown -R ubuntu:ubuntu /pnpm
-
-USER ubuntu
-WORKDIR /home/ubuntu
-ENV HOME=/home/ubuntu
-
-# Container starts with a bash shell ready for hacking.
-CMD ["bash"]

.cursor/commands/review.md

@@ -0,0 +1,29 @@
+# Code Review Checklist
+
+## Overview
+
+Comprehensive checklist for conducting thorough code reviews to ensure quality, security, and maintainability.
+
+## Review Categories
+
+### Functionality
+
+- [ ] Code does what it's supposed to do
+- [ ] Edge cases are handled
+- [ ] Error handling is appropriate
+- [ ] No obvious bugs or logic errors
+
+### Code Quality
+
+- [ ] Code is readable and well-structured
+- [ ] Functions are small and focused
+- [ ] Variable names are descriptive
+- [ ] No code duplication
+- [ ] Follows project conventions
+
+### Security
+
+- [ ] No obvious security vulnerabilities
+- [ ] Input validation is present
+- [ ] Sensitive data is handled properly
+- [ ] No hardcoded secrets

.cursor/environment.json

@@ -1,14 +1,11 @@
 {
+  "agentCanUpdateSnapshot": false,
   "install": "cp .env.dev.example .env && pnpm i",
-  "build": {
-    "context": ".",
-    "dockerfile": "Dockerfile"
-  },
-  "start": "sudo service docker start",
   "terminals": [
     {
-      "name": "dev server",
-      "command": "pnpm run dx-f"
+      "name": "Development Terminal",
+      "command": "pnpm run dev",
+      "description": "Main development terminal running the development server"
     }
   ]
 }

.cursor/rules/banner-positioning.mdc

@@ -0,0 +1,45 @@
+---
+description: Guidelines for positioning elements with banner awareness
+globs:
+  - "**/*.tsx"
+  - "**/*.jsx"
+alwaysApply: true
+---
+
+## Banner Height System
+
+When positioning elements with `sticky`, `fixed`, or `absolute` that have a global reference point (like `top-0`), **always use `top-banner-offset` instead of `top-0`**.
+
+### Why?
+The application can display system banners (payment issues, maintenance notices, etc.) that push content down. Using `top-banner-offset` ensures your positioned elements appear below the banner rather than being covered by it.
+
+### Usage
+
+**Bad:**
+```tsx
+<div className="fixed top-0 left-0 right-0">...</div>
+<div className="sticky top-0">...</div>
+<div className="absolute top-0">...</div>
+<div className="pt-0">...</div>
+```
+
+**Good:**
+```tsx
+<div className="fixed top-banner-offset left-0 right-0">...</div>
+<div className="sticky top-banner-offset">...</div>
+<div className="absolute top-banner-offset">...</div>
+<div className="pt-banner-offset">...</div>
+```
+
+### Additional Utilities
+
+- `h-screen-with-banner` / `min-h-screen-with-banner` - Use these for full-height containers that should account for banner space
+- `pt-banner-offset` - Use for padding-top to offset content below the banner
+- The system uses CSS variables `--banner-height` and `--banner-offset` defined in `web/src/styles/globals.css`
+- Banner components dynamically update `--banner-height` using ResizeObserver to track their actual rendered height, ensuring accuracy across all screen sizes
+
+### When NOT to use `top-banner-offset`
+
+- Elements positioned relative to their parent container (not globally)
+- Elements that should intentionally appear at the very top of the viewport
+- Elements inside modals/dialogs that are already z-indexed above banners

.cursor/rules/global.mdc

@@ -1,20 +1,28 @@
 ---
-description: 
-globs: 
+description:
+globs:
 alwaysApply: true
 ---
+
 ## Project setup
+
 - This project is a Turborepo monorepo
 - We build two containers, web (./web) and worker (./worker)
 - We have shared code between these two in the shared package (./packages/shared). For that package, we have different entry points [package.json](mdc:packages/shared/package.json).
 
-
 ## Domain layer
+
 The most important domain objects are in [observations.ts](mdc:packages/shared/src/domain/observations.ts), [traces.ts](mdc:packages/shared/src/domain/traces.ts), [scores.ts](mdc:packages/shared/src/domain/scores.ts).
 
-
 ## Database schema
+
 We use Postgres and Clickhouse.
+
 - The postgres schema is in [schema.prisma](mdc:packages/shared/prisma/schema.prisma)
 - The clickhouse schema is in [0001_traces.up.sql](mdc:packages/shared/clickhouse/migrations/clustered/0001_traces.up.sql), [0002_observations.up.sql](mdc:packages/shared/clickhouse/migrations/clustered/0002_observations.up.sql), [0003_scores.up.sql](mdc:packages/shared/clickhouse/migrations/clustered/0003_scores.up.sql)
 
+## Cursor Background/Cloud Agent
+
+When running in a background/cloud agent, please adhere to the following rules:
+
+- Before finishing a task, please run prettier via `pnpm format` to format the code of the repository. Otherwise, the CI check will fail on the change.

.devcontainer.json

@@ -1,6 +0,0 @@
-{
-  "name": "langfuse-development",
-  "forwardPorts": [3000, 5432, 6379, 8123, 9000],
-  "onCreateCommand": "npm install -g pnpm@9.5.0",
-  "postCreateCommand": "curl -L https://github.com/golang-migrate/migrate/releases/download/v4.18.3/migrate.linux-amd64.tar.gz | tar xvz && git restore LICENSE README.md && chmod +x migrate && sudo mv migrate /usr/bin && cp .env.dev.example .env && npm install -g @anthropic-ai/claude-code && pnpm i"
-}

.devcontainer/Dockerfile

@@ -0,0 +1,13 @@
+# Dev container Dockerfile
+FROM mcr.microsoft.com/vscode/devcontainers/typescript-node:20-bookworm
+
+# Install golang-migrate for database migrations
+RUN curl -L https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-amd64.tar.gz | tar xvz && \
+    chmod +x migrate && \
+    mv migrate /usr/local/bin/migrate
+
+# Install pnpm globally
+RUN npm install -g pnpm@9.5.0
+
+# Install Claude Code CLI
+RUN npm install -g @anthropic-ai/claude-code

.devcontainer/devcontainer.json

@@ -0,0 +1,8 @@
+{
+  "name": "langfuse-development",
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "forwardPorts": [3000, 5432, 6379, 8123, 9000],
+  "postCreateCommand": "cp .env.dev.example .env && pnpm i"
+}

.env.dev-azure.example

@@ -68,6 +68,7 @@ LANGFUSE_S3_EVENT_UPLOAD_FORCE_PATH_STYLE=true
 LANGFUSE_S3_EVENT_UPLOAD_PREFIX=events/
 
 LANGFUSE_USE_AZURE_BLOB=true
+LANGFUSE_AZURE_SKIP_CONTAINER_CHECK=false
 
 # Set during docker build of application
 # Used to disable environment verification at build time

.env.dev-redis-cluster.example

@@ -76,9 +76,12 @@ REDIS_AUTH="bitnami"
 REDIS_CLUSTER_ENABLED="true"
 REDIS_CLUSTER_NODES="127.0.0.1:6370,127.0.0.1:6371,127.0.0.1:6372,127.0.0.1:6373,127.0.0.1:6374,127.0.0.1:6375"
 LANGFUSE_INGESTION_QUEUE_SHARD_COUNT=8
+LANGFUSE_OTEL_INGESTION_QUEUE_SHARD_COUNT=4
+LANGFUSE_TRACE_UPSERT_QUEUE_SHARD_COUNT=4
 
 # openssl rand -hex 32 used only here
 ENCRYPTION_KEY=0000000000000000000000000000000000000000000000000000000000000000 
 
 # speeds up local development by not executing init scripts on server startup
 NEXT_PUBLIC_LANGFUSE_RUN_NEXT_INIT="false"
+

.env.dev.example

@@ -1,6 +1,43 @@
 # When adding additional environment variables, the schema in "/src/env.mjs"
 # should be updated accordingly.
 
+# ============================================================================
+# DOCKER CONFIGURATION
+# ============================================================================
+# These variables configure docker-compose port mappings and container names
+# To run multiple instances, copy this file to .env and customize these values
+
+# Host Ports
+# POSTGRES_HOST_PORT=5432
+# REDIS_HOST_PORT=6379
+# CLICKHOUSE_HTTP_PORT=8123
+# CLICKHOUSE_NATIVE_PORT=9000
+# MINIO_API_PORT=9090
+# MINIO_CONSOLE_PORT=9091
+# WEB_HOST_PORT=3000
+# WORKER_HOST_PORT=3030
+
+# Container Names
+# POSTGRES_CONTAINER_NAME=langfuse-postgres
+# CLICKHOUSE_CONTAINER_NAME=langfuse-clickhouse
+# REDIS_CONTAINER_NAME=langfuse-redis
+# MINIO_CONTAINER_NAME=langfuse-minio
+# WEB_CONTAINER_NAME=langfuse-web
+# WORKER_CONTAINER_NAME=langfuse-worker
+
+# Volumes
+# POSTGRES_VOLUME_NAME=langfuse_postgres_data
+# CLICKHOUSE_DATA_VOLUME_NAME=langfuse_clickhouse_data
+# CLICKHOUSE_LOGS_VOLUME_NAME=langfuse_clickhouse_logs
+# MINIO_VOLUME_NAME=langfuse_minio_data
+
+# Network
+# DOCKER_NETWORK_NAME=langfuse-network
+
+# ============================================================================
+# APPLICATION CONFIGURATION
+# ============================================================================
+
 # Prisma
 # https://www.prisma.io/docs/reference/database-reference/connection-urls#env
 DIRECT_URL="postgresql://postgres:postgres@localhost:5432/postgres"
@@ -33,6 +70,7 @@ SALT="salt"
 # Email
 EMAIL_FROM_ADDRESS=""  # Defines the email address to use as the from address.
 SMTP_CONNECTION_URL=""  # Defines the connection url for smtp server.
+CLOUD_CRM_EMAIL=""  # Optional BCC address for usage threshold emails (e.g., for CRM integration like HubSpot)
 
 # S3 Batch Exports
 LANGFUSE_S3_BATCH_EXPORT_ENABLED=true
@@ -73,6 +111,11 @@ LANGFUSE_S3_EVENT_UPLOAD_PREFIX=events/
 REDIS_HOST="127.0.0.1"
 REDIS_PORT=6379
 REDIS_AUTH="myredissecret"
+# REDIS_SENTINEL_ENABLED="false"
+# REDIS_SENTINEL_NODES="sentinel1:26379,sentinel2:26379"
+# REDIS_SENTINEL_MASTER_NAME="mymaster"
+# REDIS_SENTINEL_USERNAME=""
+# REDIS_SENTINEL_PASSWORD=""
 
 # openssl rand -hex 32 used only here
 ENCRYPTION_KEY=0000000000000000000000000000000000000000000000000000000000000000
@@ -83,3 +126,26 @@ NEXT_PUBLIC_LANGFUSE_RUN_NEXT_INIT="false"
 # For SDK integration tests to pass, decrease the ingestion queue delay by uncommenting the env vars:
 # LANGFUSE_INGESTION_QUEUE_DELAY_MS=10
 # LANGFUSE_INGESTION_CLICKHOUSE_WRITE_INTERVAL_MS=10
+
+# Slack credentials for development
+SLACK_CLIENT_ID=your_slack_client_id
+SLACK_CLIENT_SECRET=your_slack_client_secret
+SLACK_STATE_SECRET=your_slack_state_secret
+
+# Langfuse AI instance for tracing, prompts
+LANGFUSE_AI_FEATURES_PUBLIC_KEY="pk-lf-1234567890"
+LANGFUSE_AI_FEATURES_SECRET_KEY="sk-lf-1234567890"
+LANGFUSE_AI_FEATURES_HOST="http://localhost:3000"
+LANGFUSE_AI_FEATURES_PROJECT_ID=7a88fb47-b4e2-43b8-a06c-a5ce950dc53a
+
+# Langfuse AI Bedrock credentials
+AWS_ACCESS_KEY_ID="A123456789"
+AWS_SECRET_ACCESS_KEY="SAK123456789"
+LANGFUSE_AWS_BEDROCK_REGION="eu-west-1"
+LANGFUSE_AWS_BEDROCK_MODEL="eu.anthropic.claude-3-haiku-20240307-v1:0"
+
+# Events table migration
+LANGFUSE_ENABLE_EVENTS_TABLE_OBSERVATIONS=true
+LANGFUSE_ENABLE_EVENTS_TABLE_FLAGS=true
+LANGFUSE_ENABLE_EVENTS_TABLE_V2_APIS=true
+LANGFUSE_EXPERIMENT_INSERT_INTO_EVENTS_TABLE=true

.env.prod.example

@@ -41,8 +41,10 @@ OTEL_EXPORTER_OTLP_ENDPOINT="http://localhost:4318"
 OTEL_SERVICE_NAME="langfuse"
 
 # Default role for users who sign up, optional, can be org or org+project
+# Supports comma-separated IDs for multiple orgs (e.g., "org1,org2,org3")
 # LANGFUSE_DEFAULT_ORG_ID=
 # LANGFUSE_DEFAULT_ORG_ROLE=
+# Supports comma-separated IDs for multiple projects (e.g., "proj1,proj2,proj3")
 # LANGFUSE_DEFAULT_PROJECT_ID=
 # LANGFUSE_DEFAULT_PROJECT_ROLE=
 
@@ -115,6 +117,7 @@ OTEL_SERVICE_NAME="langfuse"
 # AUTH_KEYCLOAK_ALLOW_ACCOUNT_LINKING=false
 # AUTH_KEYCLOAK_CLIENT_AUTH_METHOD=
 # AUTH_KEYCLOAK_CHECKS=
+# AUTH_KEYCLOAK_NAME=
 # AUTH_WORKOS_CLIENT_ID=
 # AUTH_WORKOS_CLIENT_SECRET=
 # AUTH_WORKOS_ALLOW_ACCOUNT_LINKING=false
@@ -130,6 +133,13 @@ OTEL_SERVICE_NAME="langfuse"
 # AUTH_CUSTOM_ID_TOKEN=false # optional, default is true
 # AUTH_CUSTOM_CLIENT_AUTH_METHOD=
 # AUTH_CUSTOM_CHECKS=
+# AUTH_JUMPCLOUD_CLIENT_ID=
+# AUTH_JUMPCLOUD_CLIENT_SECRET=
+# AUTH_JUMPCLOUD_ISSUER=
+# AUTH_JUMPCLOUD_ALLOW_ACCOUNT_LINKING=
+# AUTH_JUMPCLOUD_CLIENT_AUTH_METHOD=
+# AUTH_JUMPCLOUD_CHECKS=
+# AUTH_JUMPCLOUD_SCOPE=
 
 # Transactional email, optional
 # Defines the email address to use as the from address.
@@ -156,6 +166,9 @@ OTEL_SERVICE_NAME="langfuse"
 # LANGFUSE_S3_EVENT_UPLOAD_REGION=
 # LANGFUSE_S3_EVENT_UPLOAD_ACCESS_KEY_ID=
 # LANGFUSE_S3_EVENT_UPLOAD_SECRET_ACCESS_KEY=
+# Whether to use blob_storage_file_log table to manage blob storage events
+# Can be set to `false` if `event` entities are managed using lifecycle policies in the blob storage bucket.
+LANGFUSE_ENABLE_BLOB_STORAGE_FILE_LOG=true
 
 # Automated provisioning of default resources
 # LANGFUSE_INIT_ORG_ID=org-id
@@ -172,6 +185,7 @@ OTEL_SERVICE_NAME="langfuse"
 # REDIS_HOST=
 # REDIS_PORT=
 # REDIS_AUTH=
+# REDIS_USERNAME=default
 # REDIS_CONNECTION_STRING=
 # REDIS_ENABLE_AUTO_PIPELINING=
 
@@ -179,6 +193,13 @@ OTEL_SERVICE_NAME="langfuse"
 # REDIS_CLUSTER_ENABLED=false
 # REDIS_CLUSTER_NODES=redis-node1:6379,redis-node2:6379,redis-node3:6379
 
+# Redis Sentinel configuration (optional, cannot be enabled with cluster mode simultaneously)
+# REDIS_SENTINEL_ENABLED=false
+# REDIS_SENTINEL_NODES=sentinel1:26379,sentinel2:26379,sentinel3:26379
+# REDIS_SENTINEL_MASTER_NAME=mymaster
+# REDIS_SENTINEL_USERNAME=
+# REDIS_SENTINEL_PASSWORD=
+
 # Cache configuration
 # LANGFUSE_CACHE_API_KEY_ENABLED=
 # LANGFUSE_CACHE_API_KEY_TTL_SECONDS=
@@ -244,10 +265,6 @@ OTEL_SERVICE_NAME="langfuse"
 # SENTRY_CSP_REPORT_URI=
 
 
-# Cloudflare Turnstile
-# NEXT_PUBLIC_TURNSTILE_SITE_KEY=
-# TURNSTILE_SECRET_KEY=
-
 # Demo project that users can use to try the platform
 # NEXT_PUBLIC_DEMO_ORG_ID=
 # NEXT_PUBLIC_DEMO_PROJECT_ID=
@@ -266,6 +283,14 @@ OTEL_SERVICE_NAME="langfuse"
 # Rate limiting
 # LANGFUSE_RATE_LIMITS_ENABLED=
 
+# Free tier usage thresholds (Cloud deployments only)
+# Enable the queue consumer that monitors free tier usage (default: true, but requires cloud region)
+# QUEUE_CONSUMER_FREE_TIER_USAGE_THRESHOLD_QUEUE_IS_ENABLED=true
+# Enable enforcement: send emails and block orgs that exceed free tier limits (default: false)
+# LANGFUSE_FREE_TIER_USAGE_THRESHOLD_ENFORCEMENT_ENABLED=false
+# Optional BCC address for usage threshold emails (e.g., for CRM integration like HubSpot)
+# CLOUD_CRM_EMAIL=
+
 # Stripe
 # STRIPE_SECRET_KEY=
 # STRIPE_WEBHOOK_SIGNING_SECRET=

.eslintignore

@@ -1,4 +0,0 @@
-node_modules
-**/node_modules
-build
-coverage

.github/DISCUSSION_TEMPLATE/support.yml

@@ -0,0 +1,36 @@
+body:
+  - type: textarea
+    attributes:
+      label: Describe your question
+      description: Please describe the question you have as clear and concise as possible. Include error messages, unexpected behavior, or steps to reproduce the problem.
+    validations:
+      required: true
+  - type: dropdown
+    attributes:
+      label: Langfuse Cloud or Self-Hosted?
+      options:
+        - "Langfuse Cloud"
+        - "Self-Hosted"
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: If Self-Hosted
+      description: What version are you running? We may ask you to upgrade to the latest version, as many issues are continuously being fixed.
+  - type: input
+    attributes:
+      label: If Langfuse Cloud
+      description: Please share the link to your Langfuse project or the specific view you have a question about. This helps us resolve requests faster.
+  - type: textarea
+    attributes:
+      label: SDK and integration versions
+      description: If you're experiencing an issue with an integration or SDK, please share all package versions you're using. If you are not on the latest version, try upgrading, as this will often resolve the issue.
+  - type: checkboxes
+    attributes:
+      label: Pre-Submission Checklist
+      description: Please check for existing [issues](https://github.com/langfuse/langfuse/issues) and [discussions](https://github.com/orgs/langfuse/discussions) and ask the [Langfuse AI chatbot](https://langfuse.com/docs/ask-ai).
+      options:
+        - label: I have checked for existing issues/discussions and consulted Langfuse AI.
+          required: true
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -1,33 +1,45 @@
 name: 🐞 Bug Report
-description: Create a bug report to help us improve
-title: "bug: "
+description: Report a bug to help us improve
+title: "bug: <short description>"
 labels: ["🐞❔ unconfirmed bug"]
 body:
   - type: textarea
     attributes:
       label: Describe the bug
-      description: A clear and concise description of the bug, as well as what you expected to happen when encountering it.
+      description: A clear and concise description of the bug, and what you expected to happen when you encountered it.
     validations:
       required: true
   - type: textarea
     attributes:
-      label: To reproduce
-      description: Describe how to reproduce your bug. Please provide detailed steps, code snippets, reproduction repos etc.
+      label: Steps to reproduce
+      description: Describe how to reproduce the bug. Please provide detailed steps, code snippets, a minimal reproduction repository, etc.
     validations:
       required: true
+  - type: dropdown
+    attributes:
+      label: Langfuse Cloud or self-hosted?
+      options:
+        - "Langfuse Cloud"
+        - "Self-hosted"
+    validations:
+      required: true
+  - type: input
+    attributes:
+      label: If self-hosted, what version are you running?
+      description: We may ask you to upgrade to the latest version, as many issues are continuously being fixed.
   - type: textarea
     attributes:
-      label: SDK and container versions
-      description: If you're experiencing an issue with an integration or SDK, please ensure you're using the latest version. If you're self-hosting Langfuse, check that you're running the most recent version. If updating isn't an option, please provide the specific versions you're currently using.
+      label: SDK and integration versions
+      description: If you're experiencing an issue with an integration or SDK, please share all package versions you're using. If you are not on the latest version, try upgrading, as this will often resolve the issue.
   - type: textarea
     attributes:
       label: Additional information
-      description: Add any other information related to the bug here, screenshots if applicable.
+      description: Add any other information related to the bug here, including screenshots if applicable.
   - type: dropdown
     id: contribute
     attributes:
-      label: Are you interested to contribute a fix for this bug?
-      description: If this is a confirmed bug, the maintainers are happy to support with guidance and review.
+      label: Are you interested in contributing a fix for this bug?
+      description: If this is a confirmed bug, the maintainers are happy to provide guidance and review.
       options:
         - "No"
         - "Yes"

.github/workflows/deploy.yml

@@ -6,16 +6,18 @@ on:
   workflow_dispatch:
     inputs:
       service:
-        description: 'Service to be deployed'
+        description: "Service to be deployed"
         type: choice
         options:
           - all
           - web
           - web-ingestion
+          - web-iso
           - worker
+          - worker-cpu
         required: true
       environment:
-        description: 'Environment to deploy to'
+        description: "Environment to deploy to"
         type: choice
         options:
           - staging
@@ -43,12 +45,12 @@ jobs:
           script: |
             if (context.eventName === "workflow_dispatch") {
               if (context.payload.inputs.service === "all") {
-                return `["web", "web-ingestion", "worker"]`
+                return `["web", "web-ingestion", "web-iso", "worker", "worker-cpu"]`
               }
               return `["${context.payload.inputs.service}"]`
             }
             if (context.eventName === "push") {
-              return `["web", "web-ingestion", "worker"]`
+              return `["web", "web-ingestion", "web-iso", "worker", "worker-cpu"]`
             }
             return "[]"
           result-encoding: string

.github/workflows/pipeline.yml

@@ -21,12 +21,28 @@ jobs:
     runs-on: ubuntu-latest
     outputs:
       should_skip: ${{ steps.skip_check.outputs.should_skip }}
+      llm_connections_changed: ${{ steps.filter.outputs.llm_connections }}
     timeout-minutes: 15
+    permissions:
+      pull-requests: read
     steps:
       - id: skip_check
         uses: fkirc/skip-duplicate-actions@v5
         with:
           do_not_skip: '["workflow_dispatch"]'
+      - uses: actions/checkout@v4
+        with:
+          # Recommended for paths-filter action
+          # may save additional git fetch roundtrip if
+          # merge-base is found within latest N commits
+          fetch-depth: 20
+      - uses: dorny/paths-filter@v3
+        id: filter
+        with:
+          filters: |
+            llm_connections:
+              - 'packages/shared/package.json'
+              - 'packages/shared/src/server/llm/fetchLLMCompletion.ts'
 
   lint:
     runs-on: ubuntu-latest
@@ -40,9 +56,17 @@ jobs:
           version: 9.5.0
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 24
           cache: "pnpm"
           cache-dependency-path: "pnpm-lock.yaml"
+      - name: Setup Turbo cache
+        uses: actions/cache@v4
+        with:
+          path: .turbo
+          key: ${{ runner.os }}-turbo-lint-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-turbo-lint-
+            ${{ runner.os }}-turbo-
       - name: install dependencies
         run: |
           pnpm i
@@ -66,7 +90,7 @@ jobs:
           version: 9.5.0
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 24
           cache: "pnpm"
           cache-dependency-path: "pnpm-lock.yaml"
       - name: install dependencies
@@ -82,12 +106,12 @@ jobs:
           else
             BASE_SHA=$(git merge-base origin/main HEAD)
           fi
-          
+
           echo "Checking files changed from $BASE_SHA to HEAD"
-          
+
           # Get changed files
           CHANGED_FILES=$(git diff --name-only $BASE_SHA HEAD -- '*.js' '*.jsx' '*.ts' '*.tsx' '*.css' | tr '\n' ' ')
-          
+
           if [ -n "$CHANGED_FILES" ] && [ "$CHANGED_FILES" != " " ]; then
             echo "Files to check: $CHANGED_FILES"
             pnpm prettier --check --experimental-cli $CHANGED_FILES
@@ -114,7 +138,9 @@ jobs:
         run: echo "NEXT_PUBLIC_BUILD_ID=$(git rev-parse --short HEAD)" >> $GITHUB_ENV
       - name: Build and run both images from compose
         run: |
-          docker compose -f docker-compose.build.yml up -d
+          docker compose --progress plain --verbose -f docker-compose.build.yml build --print > /tmp/bake.json
+          docker buildx bake -f /tmp/bake.json
+          docker compose --progress plain -f docker-compose.build.yml up -d
           sleep 5 # Wait for PostgreSQL to accept connections
       - name: Ensure no unhealthy status
         run: |
@@ -140,13 +166,13 @@ jobs:
     name: tests-web-sync (node${{ matrix.node-version }}, pg${{ matrix.postgres-version }})
     strategy:
       matrix:
-        node-version: [20]
+        node-version: [24]
         postgres-version: [12, 15]
     steps:
       - uses: actions/checkout@v4
       - name: Install golang-migrate for Clickhouse migrations
         run: |
-          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.18.3/migrate.linux-amd64.tar.gz | tar xvz
+          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-amd64.tar.gz | tar xvz
           sudo mv migrate /usr/bin/migrate
           which migrate
       - uses: pnpm/action-setup@v3
@@ -174,6 +200,23 @@ jobs:
           echo "LANGFUSE_INGESTION_QUEUE_DELAY_MS=1" >> .env
           echo "LANGFUSE_CACHE_PROMPT_ENABLED=false" >> .env
           echo "LANGFUSE_INGESTION_CLICKHOUSE_WRITE_INTERVAL_MS=1" >> .env
+      - name: Setup Turbo cache
+        uses: actions/cache@v4
+        with:
+          path: .turbo
+          key: ${{ runner.os }}-turbo-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-turbo-
+      - name: Cache Next.js builds
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.npm
+            ${{ github.workspace }}/web/.next/cache
+          key: ${{ runner.os }}-nextjs-${{ matrix.node-version }}-${{ hashFiles('**/pnpm-lock.yaml') }}-${{ hashFiles('web/**/*.js', 'web/**/*.jsx', 'web/**/*.ts', 'web/**/*.tsx') }}
+          restore-keys: |
+            ${{ runner.os }}-nextjs-${{ matrix.node-version }}-${{ hashFiles('**/pnpm-lock.yaml') }}-
+            ${{ runner.os }}-nextjs-${{ matrix.node-version }}-
       - name: Run dev containers
         run: |
           docker compose -f docker-compose.dev.yml up -d
@@ -187,6 +230,8 @@ jobs:
           pnpm --filter=shared ch:up
       - name: Build
         run: pnpm run build
+        env:
+          NODE_OPTIONS: --max_old_space_size=8192
       - name: Start Langfuse
         run: (pnpm run start&)
         env:
@@ -201,9 +246,11 @@ jobs:
           LANGFUSE_INIT_USER_NAME: "Demo User"
           LANGFUSE_INIT_USER_PASSWORD: "password"
       - name: run test-sync
-        run: pnpm --filter=web run test-sync
+        working-directory: web
+        run: npx cross-env NODE_OPTIONS='--no-experimental-require-module' npx dotenv -e ../.env.test -e ../.env -- npx jest --verbose --runInBand --detectOpenHandles --selectProjects sync-server
       - name: run test-client
-        run: pnpm --filter=web run test-client
+        working-directory: web
+        run: npx cross-env NODE_OPTIONS='--no-experimental-require-module' npx dotenv -e ../.env.test -e ../.env -- npx jest --verbose --runInBand --detectOpenHandles --selectProjects client
 
   tests-web-async:
     timeout-minutes: 30
@@ -211,17 +258,18 @@ jobs:
     needs:
       - pre-job
     if: needs.pre-job.outputs.should_skip != 'true'
-    name: tests-web-async (node${{ matrix.node-version }}, pg${{ matrix.postgres-version }}, mode${{ matrix.deploy-mode }})
+    name: tests-web-async (node${{ matrix.node-version }}, pg${{ matrix.postgres-version }}, mode${{ matrix.deploy-mode }}, shard${{ matrix.shard }}/3)
     strategy:
       matrix:
-        node-version: [20]
+        node-version: [24]
         postgres-version: [12, 15]
         deploy-mode: ["", "-azure", "-redis-cluster"]
+        shard: [1, 2, 3]
     steps:
       - uses: actions/checkout@v4
       - name: Install golang-migrate for Clickhouse migrations
         run: |
-          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.18.3/migrate.linux-amd64.tar.gz | tar xvz
+          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-amd64.tar.gz | tar xvz
           sudo mv migrate /usr/bin/migrate
           which migrate
       - uses: pnpm/action-setup@v3
@@ -251,6 +299,23 @@ jobs:
           echo "LANGFUSE_TRACE_DELETE_CONCURRENCY=100" >> .env
           echo "ADMIN_API_KEY=admin-api-key" >> .env
           echo "LANGFUSE_EE_LICENSE_KEY=langfuse_ee_test" >> .env
+      - name: Setup Turbo cache
+        uses: actions/cache@v4
+        with:
+          path: .turbo
+          key: ${{ runner.os }}-turbo-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-turbo-
+      - name: Cache Next.js builds
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.npm
+            ${{ github.workspace }}/web/.next/cache
+          key: ${{ runner.os }}-nextjs-async-${{ matrix.node-version }}-${{ hashFiles('**/pnpm-lock.yaml') }}-${{ hashFiles('web/**/*.js', 'web/**/*.jsx', 'web/**/*.ts', 'web/**/*.tsx') }}
+          restore-keys: |
+            ${{ runner.os }}-nextjs-async-${{ matrix.node-version }}-${{ hashFiles('**/pnpm-lock.yaml') }}-
+            ${{ runner.os }}-nextjs-async-${{ matrix.node-version }}-
       - name: Run dev containers
         run: |
           docker compose -f docker-compose.dev${{ matrix.deploy-mode }}.yml up -d
@@ -262,8 +327,24 @@ jobs:
         run: |
           pnpm run db:migrate
           pnpm --filter=shared ch:up
+      - name: Download and extract ClickHouse client for dev-tables setup
+        if: matrix.deploy-mode == ''
+        run: |
+          CH_VERSION="24.9.3.128"
+          ARCH="amd64"
+          wget "https://packages.clickhouse.com/deb/pool/main/c/clickhouse/clickhouse-common-static_${CH_VERSION}_${ARCH}.deb" -O clickhouse-client.deb
+
+          # The binary is usually located in ./usr/bin/clickhouse in the archive
+          dpkg-deb -x clickhouse-client.deb ch_client_dir
+          sudo cp ch_client_dir/usr/bin/clickhouse /usr/local/bin/
+      - name: Setup Dev Tables
+        if: matrix.deploy-mode == ''
+        run: |
+          pnpm --filter=shared ch:dev-tables
       - name: Build
         run: pnpm run build
+        env:
+          NODE_OPTIONS: --max_old_space_size=8192
       - name: Start Langfuse
         run: (pnpm run start&)
         env:
@@ -278,7 +359,8 @@ jobs:
           LANGFUSE_INIT_USER_NAME: "Demo User"
           LANGFUSE_INIT_USER_PASSWORD: "password"
       - name: run tests
-        run: pnpm --filter=web run test
+        working-directory: web
+        run: npx cross-env NODE_OPTIONS='--no-experimental-require-module' npx dotenv -e ../.env.test -e ../.env -- npx jest --verbose --runInBand --detectOpenHandles --selectProjects async-server --shard=${{ matrix.shard }}/3
 
   tests-worker:
     timeout-minutes: 20
@@ -289,7 +371,7 @@ jobs:
     name: tests-worker (node${{ matrix.node-version }}, pg${{ matrix.postgres-version }}, mode${{ matrix.deploy-mode }})
     strategy:
       matrix:
-        node-version: [20]
+        node-version: [24]
         postgres-version: [12, 15]
         deploy-mode: ["", "-azure", "-redis-cluster"]
     steps:
@@ -314,7 +396,7 @@ jobs:
           pnpm install
       - name: Install golang-migrate for Clickhouse migrations
         run: |
-          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.18.3/migrate.linux-amd64.tar.gz | tar xvz
+          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-amd64.tar.gz | tar xvz
           sudo mv migrate /usr/bin/migrate
           which migrate
       - name: Load default env
@@ -340,10 +422,95 @@ jobs:
           pnpm run db:migrate
           pnpm run db:seed
           pnpm run --filter=shared ch:up
+      - name: Download and extract ClickHouse client for dev-tables setup
+        if: matrix.deploy-mode == ''
+        run: |
+          CH_VERSION="24.9.3.128"
+          ARCH="amd64"
+          wget "https://packages.clickhouse.com/deb/pool/main/c/clickhouse/clickhouse-common-static_${CH_VERSION}_${ARCH}.deb" -O clickhouse-client.deb
+          dpkg-deb -x clickhouse-client.deb ch_client_dir
+          sudo cp ch_client_dir/usr/bin/clickhouse /usr/local/bin/
+      - name: Setup Dev Tables
+        if: matrix.deploy-mode == ''
+        run: |
+          pnpm --filter=shared ch:dev-tables
       - name: Build
         run: pnpm --filter=worker... run build
       - name: run tests
-        run: pnpm --filter=worker run test
+        run: pnpm --filter=worker run test:exclude-llm-connections
+
+  test-worker-llm-connections:
+    timeout-minutes: 20
+    runs-on: ubuntu-latest
+    needs:
+      - pre-job
+    if: startsWith(github.ref, 'refs/tags/') || (needs.pre-job.outputs.should_skip != 'true' && (needs.pre-job.outputs.llm_connections_changed == 'true' || github.event_name == 'workflow_dispatch'))
+    name: test-worker-llm-connections (node24, pg15)
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v3
+        with:
+          version: 9.5.0
+      - name: Login to Docker Hub
+        if: github.repository == 'langfuse/langfuse' && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository)
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME_READ }}
+          password: ${{ secrets.DOCKERHUB_TOKEN_READ }}
+      - name: Use Node.js 24
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: "pnpm"
+          cache-dependency-path: "pnpm-lock.yaml"
+      - name: install dependencies
+        run: |
+          pnpm install
+      - name: Install golang-migrate for Clickhouse migrations
+        run: |
+          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-amd64.tar.gz | tar xvz
+          sudo mv migrate /usr/bin/migrate
+          which migrate
+      - name: Load default env
+        run: |
+          cp .env.dev.example .env
+          cp .env.dev.example web/.env
+          cp .env.dev.example worker/.env
+      - name: Run + migrate
+        run: |
+          docker compose -f docker-compose.dev.yml up -d
+          sleep 5 # Wait for PostgreSQL to accept connections
+          docker compose ps
+        env:
+          POSTGRES_VERSION: 15
+      - name: Ensure no unhealthy status
+        run: |
+          if docker compose ps | grep "(unhealthy)"; then
+            echo "One or more services are unhealthy"
+            exit 1
+          else
+            echo "All services are healthy"
+          fi
+      - name: Seed DB
+        run: |
+          pnpm run db:migrate
+          pnpm run db:seed
+          pnpm run --filter=shared ch:up
+      - name: Build
+        run: pnpm --filter=worker... run build
+      - name: run llm connection tests
+        run: pnpm --filter=worker run test:llm-connections-only
+        env:
+          LANGFUSE_LLM_CONNECTION_OPENAI_KEY: ${{ secrets.LANGFUSE_LLM_CONNECTION_OPENAI_KEY }}
+          LANGFUSE_LLM_CONNECTION_ANTHROPIC_KEY: ${{ secrets.LANGFUSE_LLM_CONNECTION_ANTHROPIC_KEY }}
+          LANGFUSE_LLM_CONNECTION_AZURE_KEY: ${{ secrets.LANGFUSE_LLM_CONNECTION_AZURE_KEY }}
+          LANGFUSE_LLM_CONNECTION_AZURE_BASE_URL: ${{ secrets.LANGFUSE_LLM_CONNECTION_AZURE_BASE_URL }}
+          LANGFUSE_LLM_CONNECTION_AZURE_MODEL: ${{ secrets.LANGFUSE_LLM_CONNECTION_AZURE_MODEL }}
+          LANGFUSE_LLM_CONNECTION_BEDROCK_ACCESS_KEY_ID: ${{ secrets.LANGFUSE_LLM_CONNECTION_BEDROCK_ACCESS_KEY_ID }}
+          LANGFUSE_LLM_CONNECTION_BEDROCK_SECRET_ACCESS_KEY: ${{ secrets.LANGFUSE_LLM_CONNECTION_BEDROCK_SECRET_ACCESS_KEY }}
+          LANGFUSE_LLM_CONNECTION_BEDROCK_REGION: ${{ secrets.LANGFUSE_LLM_CONNECTION_BEDROCK_REGION }}
+          LANGFUSE_LLM_CONNECTION_VERTEXAI_KEY: ${{ secrets.LANGFUSE_LLM_CONNECTION_VERTEXAI_KEY }}
+          LANGFUSE_LLM_CONNECTION_GOOGLEAISTUDIO_KEY: ${{ secrets.LANGFUSE_LLM_CONNECTION_GOOGLEAISTUDIO_KEY }}
 
   e2e-tests:
     runs-on: ubuntu-latest
@@ -357,7 +524,7 @@ jobs:
           version: 9.5.0
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 24
           cache: "pnpm"
           cache-dependency-path: "pnpm-lock.yaml"
       - name: Login to Docker Hub
@@ -366,6 +533,24 @@ jobs:
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME_READ }}
           password: ${{ secrets.DOCKERHUB_TOKEN_READ }}
+      - name: Setup Turbo cache
+        uses: actions/cache@v4
+        with:
+          path: .turbo
+          key: ${{ runner.os }}-turbo-e2e-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-turbo-e2e-
+            ${{ runner.os }}-turbo-
+      - name: Cache Next.js builds
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.npm
+            ${{ github.workspace }}/web/.next/cache
+          key: ${{ runner.os }}-nextjs-e2e-${{ hashFiles('**/pnpm-lock.yaml') }}-${{ hashFiles('web/**/*.js', 'web/**/*.jsx', 'web/**/*.ts', 'web/**/*.tsx') }}
+          restore-keys: |
+            ${{ runner.os }}-nextjs-e2e-${{ hashFiles('**/pnpm-lock.yaml') }}-
+            ${{ runner.os }}-nextjs-e2e-
       - name: install dependencies
         run: |
           pnpm install
@@ -375,7 +560,7 @@ jobs:
           cp .env.dev.example web/.env
       - name: Install golang-migrate for Clickhouse migrations
         run: |
-          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.18.3/migrate.linux-amd64.tar.gz | tar xvz
+          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-amd64.tar.gz | tar xvz
           sudo mv migrate /usr/bin/migrate
           which migrate
       - name: Run + migrate
@@ -398,6 +583,8 @@ jobs:
           pnpm run db:seed
       - name: Build
         run: pnpm run build
+        env:
+          NODE_OPTIONS: --max_old_space_size=8192
       - name: Install playwright
         run: pnpm --filter=web exec playwright install --with-deps
       - name: Run e2e tests
@@ -421,7 +608,7 @@ jobs:
           version: 9.5.0
       - uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 24
           cache: "pnpm"
           cache-dependency-path: "pnpm-lock.yaml"
       - name: install dependencies
@@ -429,7 +616,7 @@ jobs:
           pnpm install
       - name: Install golang-migrate for Clickhouse migrations
         run: |
-          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.18.3/migrate.linux-amd64.tar.gz | tar xvz
+          curl -L https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-amd64.tar.gz | tar xvz
           sudo mv migrate /usr/bin/migrate
           which migrate
       - name: Load default env
@@ -455,6 +642,8 @@ jobs:
           pnpm run db:seed:examples
       - name: Build
         run: pnpm run build
+        env:
+          NODE_OPTIONS: --max_old_space_size=8192
       - name: Run server
         run: (pnpm run start&)
       - name: Check worker health
@@ -475,13 +664,24 @@ jobs:
         prettier-check,
         tests-web-sync,
         tests-worker,
-        e2e-tests,
+        test-worker-llm-connections,
+        # e2e-tests, # Temporarily disabled - flaky timeouts
         test-docker-build,
         e2e-server-tests,
         tests-web-async,
       ]
     if: always()
+    outputs:
+      success: ${{ steps.set-success-output.outputs.success }}
     steps:
+      - name: Set check result as an output
+        id: set-success-output
+        run: |
+          if [[ "${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}" == "true" ]]; then
+            echo "success=false" >> $GITHUB_OUTPUT
+          else
+            echo "success=true" >> $GITHUB_OUTPUT
+          fi
       - name: Successful deploy
         if: ${{ !(contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled')) }}
         run: exit 0
@@ -490,10 +690,22 @@ jobs:
         if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
         run: exit 1
         working-directory: .
+      - name: Notify Slack
+        uses: ravsamhq/notify-slack-action@v2
+        if: always() && github.event_name == 'push' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/'))
+        with:
+          status: ${{ job.status }}
+          notify_when: "failure"
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
+      - name: Output job results
+        run: |
+          echo "Job results: ${{ steps.set-success-output.outputs.success }}"
 
   push-docker-image:
     needs: all-ci-passed
-    if: github.event_name == 'push' && (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/'))
+    # if something inside all-ci-passed was skipped, but everything that ran passed, we still want to deploy
+    if: always() && needs.all-ci-passed.outputs.success == 'true' && github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
     environment: "protected branches"
     runs-on: ubuntu-latest
     permissions:
@@ -507,7 +719,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 24
           cache-dependency-path: "pnpm-lock.yaml"
       - name: Checkout
         uses: actions/checkout@v4

.github/workflows/sdk-api-spec.yml

@@ -0,0 +1,149 @@
+name: SDK API Spec Generation
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'fern/**'
+  workflow_dispatch:
+
+concurrency:
+  group: sdk-api-spec-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  generate-sdk-api-specs:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        with:
+          version: 9
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "24"
+          cache: "pnpm"
+
+      - name: Install dependencies
+        run: pnpm install
+
+      - name: Generate SDK specs
+        env:
+          FERN_TOKEN: ${{ secrets.FERN_TOKEN }}
+        run: npx fern-api generate --api server --force
+
+      - name: Update Python SDK
+        env:
+          GH_ACCESS_TOKEN: ${{ secrets.GH_ACCESS_TOKEN }}
+        run: |
+          # Clone langfuse-python repository
+          git clone https://github.com/langfuse/langfuse-python.git ../langfuse-python
+          cd ../langfuse-python
+
+          git config user.name "langfuse-bot"
+          git config user.email "langfuse-bot@langfuse.com"
+          echo "$GH_ACCESS_TOKEN" | gh auth login --with-token
+          gh auth setup-git
+
+          # Delete existing API contents
+          rm -rf langfuse/api/*
+
+          # Copy generated Python SDK files
+          cp -r ../langfuse/generated/python/* langfuse/api/
+
+          # Remove unnecessary integration tests created by Fern
+          # (could not find the right option to prevent this in generation step)
+          rm -rf langfuse/api/tests
+
+          # Install poetry and format
+          pip install poetry
+          poetry install --all-extras
+          poetry run ruff format langfuse/api
+
+          # Check for changes and show diff for debugging
+          if git diff --quiet; then
+            echo "No changes detected in Python SDK"
+            exit 0
+          fi
+
+          # Close existing api-spec-bot PRs
+          gh pr list --author langfuse-bot --state open --json number --jq '.[].number' | xargs -I {} gh pr close {}
+
+          # Get the GitHub username of the original commit author
+          cd ../langfuse
+          ORIGINAL_AUTHOR=$(gh api repos/langfuse/langfuse/commits/${GITHUB_SHA} --jq '.author.login')
+          cd ../langfuse-python
+
+          # Create new branch and push changes
+          BRANCH_NAME="api-spec-bot-${GITHUB_SHA::7}"
+          git checkout -b "$BRANCH_NAME"
+          git add .
+          git commit -m "feat(api): update API spec from langfuse/langfuse ${GITHUB_SHA::7}"
+          git push origin "$BRANCH_NAME"
+
+          # Create PR with original author as reviewer
+          gh pr create --title "feat(api): update API spec from langfuse/langfuse ${GITHUB_SHA::7}" --body "" --reviewer "$ORIGINAL_AUTHOR"
+
+      - name: Update TypeScript SDK
+        env:
+          GH_ACCESS_TOKEN: ${{ secrets.GH_ACCESS_TOKEN }}
+        run: |
+          # Clone langfuse-js repository
+          git clone https://github.com/langfuse/langfuse-js.git ../langfuse-js
+          cd ../langfuse-js
+
+          # Configure git
+          git config user.name "langfuse-bot"
+          git config user.email "langfuse-bot@langfuse.com"
+          echo "$GH_ACCESS_TOKEN" | gh auth login --with-token
+          gh auth setup-git
+
+          # Delete existing API contents
+          rm -rf packages/core/src/api/*
+
+          # Copy generated TypeScript SDK files
+          cp -r ../langfuse/generated/typescript/* packages/core/src/api/
+
+          # Patch compilation error inducing output
+          # Without this patch, the JS SDK will not build due to
+          # "Error: packages/core build: src/api/core/auth/index.ts(1,10): error TS1205: Re-exporting a type when 'isolatedModules' is enabled requires using 'export type'."
+          if [ -f "packages/core/src/api/core/auth/index.ts" ]; then
+            if grep -q '^export { AuthProvider } from "./AuthProvider.js";$' packages/core/src/api/core/auth/index.ts; then
+              sed -i '1s/^export { AuthProvider }/export { type AuthProvider }/' packages/core/src/api/core/auth/index.ts
+            fi
+          fi
+
+          # Install dependencies and format
+          npm install -g pnpm
+          pnpm install
+          pnpm format
+
+          # Check for changes and show diff for debugging
+          if git diff --quiet; then
+            echo "No changes detected in TypeScript SDK"
+            exit 0
+          fi
+
+          # Close existing api-spec-bot PRs
+          gh pr list --author langfuse-bot --state open --json number --jq '.[].number' | xargs -I {} gh pr close {}
+
+          # Get the GitHub username of the original commit author
+          cd ../langfuse
+          ORIGINAL_AUTHOR=$(gh api repos/langfuse/langfuse/commits/${GITHUB_SHA} --jq '.author.login')
+          cd ../langfuse-js
+
+          # Create new branch and push changes
+          BRANCH_NAME="api-spec-bot-${GITHUB_SHA::7}"
+          git checkout -b "$BRANCH_NAME"
+          git add .
+          git commit -m "feat(api): update API spec from langfuse/langfuse ${GITHUB_SHA::7}" --no-verify
+          git push origin "$BRANCH_NAME"
+
+          # Create PR with original author as reviewer
+          gh pr create --title "feat(api): update API spec from langfuse/langfuse ${GITHUB_SHA::7}" --body "" --reviewer "$ORIGINAL_AUTHOR"

.github/workflows/validate-pr-title.yml

@@ -0,0 +1,46 @@
+---
+name: "Validate PR Title"
+
+on:
+  pull_request:
+    branches:
+      - "**"
+    types:
+      - opened
+      - edited
+      - synchronize
+      - reopened
+
+jobs:
+  validate-pr-title:
+    runs-on: ubuntu-latest
+    permissions:
+      statuses: write
+      pull-requests: read
+    steps:
+      - name: Validate PR title follows conventional commits
+        uses: amannn/action-semantic-pull-request@v6
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          # Configure the types of commits allowed
+          types: |
+            feat
+            fix
+            docs
+            style
+            refactor
+            perf
+            test
+            build
+            ci
+            chore
+            revert
+            security
+          # Allow scopes (optional)
+          requireScope: false
+          # Allow any scope (not just the ones listed above)
+          validateSingleCommit: false
+          ignoreLabels: |
+            bot
+            ignore-semantic-pull-request

.gitignore

@@ -5,6 +5,7 @@
 /.pnp
 .pnp.js
 migrate
+/.pnpm-store
 
 # testing
 /coverage
@@ -16,6 +17,7 @@ migrate
 
 # next.js
 /.next/
+/.next-check/
 /out/
 next-env.d.ts
 
@@ -34,6 +36,7 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 .pnpm-debug.log*
+.eslintcache
 
 # local env files
 # do not commit any .env files to git, except for the .env.example file. https://create.t3.gg/en/usage/env-variables#using-environment-variables
@@ -50,19 +53,20 @@ yarn-error.log*
 # typescript
 *.tsbuildinfo
 
-/generated/typescript-server
+/generated
 
 # openapi spec that is copied during build
 /public/openapi*.yml
 
+# claude meta files
+.claude/tsc-cache
 
 # vscode
-.devcontainer
-
 node_modules
 **/node_modules
 **/dist
 **/.next/*
+**/.next-check/*
 **/.turbo/*
 .yarn
 .turbo
@@ -71,3 +75,9 @@ web/test-results/*
 
 # local config files
 *.local.*
+
+# claude meta files
+.claude/tsc-cache
+
+# Refactoring planning files (local only)
+**/.refactor/

.npmrc

@@ -1 +1,3 @@
-public-hoist-pattern[]=*prisma*
+public-hoist-pattern[]=*prisma*
+# for turbopack, ongoing issue see: https://github.com/vercel/next.js/issues/68805
+public-hoist-pattern[]=@aws-sdk/client-s3

.nvmrc

@@ -1 +1 @@
-v20
+v24.6.0

.vscode/settings.json

@@ -28,5 +28,11 @@
     "editor.defaultFormatter": "Prisma.prisma"
   },
   "eslint.lintTask.enable": true,
-  "eslint.workingDirectories": ["./web", "./worker"]
+  "eslint.workingDirectories": [
+    { "pattern": "./web" },
+    { "pattern": "./worker" },
+    { "pattern": "./packages/shared" },
+    { "pattern": "./ee" }
+  ],
+  "eslint.useFlatConfig": true
 }

CLAUDE.md

@@ -72,9 +72,11 @@ pnpm run infra:dev:up      # Start Docker services (PostgreSQL, ClickHouse, Redi
 pnpm run infra:dev:down    # Stop Docker services
 ```
 
-### Building
+### Building & Type Checking
 ```sh
 pnpm --filter=PACKAGE_NAME run build  # Runs the build command, will show real typescript errors etc.
+pnpm tc                               # Fast typecheck across all packages (alias for pnpm typecheck)
+pnpm build:check                      # Full Next.js build to alternate dir (can run parallel with dev server)
 ```
 
 ### Testing in Web Package
@@ -82,8 +84,11 @@ The web package uses JEST for unit tests.
 Depending on the file location (sync, async)
 `web` related tests must go into the `web/src/__tests__/` folder.
 ```sh
-pnpm test-sync --testPathPattern="$FILE_LOCATION_PATTERN" --testNamePattern="$TEST_NAME_PATTERN"
-pnpm test-async --testPathPattern="$FILE_LOCATION_PATTERN" --testNamePattern="$TEST_NAME_PATTERN"
+pnpm test-sync --testPathPatterns="$FILE_LOCATION_PATTERN" --testNamePattern="$TEST_NAME_PATTERN"
+# For tests in the async folder:
+pnpm test -- --testPathPatterns="$FILE_LOCATION_PATTERN" --testNamePattern="$TEST_NAME_PATTERN"
+# For client tests:
+pnpm test-client --testPathPatterns="buildStepData" --testNamePattern="buildStepData"
 ```
 
 ### Testing in the Worker Package
@@ -165,7 +170,7 @@ pnpm run nuke              # Remove all node_modules, build files, wipe database
 
 ## Environment Setup
 
-- **Node.js**: Version 20 (specified in `.nvmrc`)
+- **Node.js**: Version 24 (specified in `.nvmrc`)
 - **Package Manager**: pnpm v9.5.0
 - **Database Dependencies**: Docker for local PostgreSQL, ClickHouse, Redis, MinIO
 - **Environment**: Copy `.env.dev.example` to `.env`
@@ -189,6 +194,24 @@ To get a project, use the `get_project` capability with the full project name as
 
 ## TypeScript Best Practices
 - In TypeScript, if possible, don't use the `any` type
+- **Use a single params object for functions with multiple arguments** - This makes code more readable at call sites and prevents bugs when arguments of the same type are accidentally swapped:
+
+```typescript
+// ❌ Bad - positional arguments are unclear and can be swapped without type errors
+function sendMessage(userId: string, sessionId: string, projectId: string) {
+  // ...
+}
+sendMessage(someString, someOtherString, anotherString); // Which is which?
+
+// ✅ Good - params object makes intent clear and prevents argument swapping
+function sendMessage(params: { userId: string; sessionId: string; projectId: string }) {
+  // ...
+}
+sendMessage({ userId: someString, sessionId: someOtherString, projectId: anotherString });
+```
 
 ## General Coding Guidelines
 - For easier code reviews, prefer not to move functions etc around within a file unless necessary or instructed to do so
+
+## Development Tips
+- Before trying to build the package, try running the linter once first

CONTRIBUTING.md

@@ -35,6 +35,10 @@ A good first step is to search for open [issues](https://github.com/langfuse/lan
 
 ## Project Overview
 
+We recommend checking out DeepWiki to familiarize yourself with the project:
+
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/langfuse/langfuse)
+
 ### Technologies we use
 
 - Application (this repository)
@@ -90,8 +94,6 @@ The diagram below may not show all relationships if the foreign key is not defin
 
 Full database schema: [packages/shared/prisma/schema.prisma](packages/shared/prisma/schema.prisma)
 
-<img src="./packages/shared/prisma/database.svg">
-
 ## Repository Structure
 
 We built a monorepo using [pnpm](https://pnpm.io/motivation) and [turbo](https://turbo.build/repo/docs) to manage the dependencies and build process. The monorepo contains the following packages:
@@ -108,15 +110,19 @@ We built a monorepo using [pnpm](https://pnpm.io/motivation) and [turbo](https:/
 
 Requirements
 
-- Node.js 20 as specified in the [.nvmrc](.nvmrc)
+- Node.js 24 as specified in the [.nvmrc](.nvmrc)
 - Pnpm v.9.5.0
 - Docker to run the database locally
+- Clickhouse client
 
 **Note:** You can also simply run Langfuse in a **GitHub Codespace** via the provided devcontainer. To do this, click on the green "Code" button in the top right corner of the repository and select "Open with Codespaces".
 
 **Steps**
 
-1. Install [golang-migrate](https://github.com/golang-migrate/migrate/tree/master/cmd/migrate#migrate-cli) as CLI
+1. Install development dependencies:
+   - [golang-migrate](https://github.com/golang-migrate/migrate/tree/master/cmd/migrate#migrate-cli) as CLI
+   - [clickhouse binary](https://clickhouse.com/docs/install) on macOS with brew: `brew install --cask clickhouse`
+
 2. Fork the repository and clone it locally
 
    ```bash
@@ -137,7 +143,7 @@ Requirements
     cp .env.dev.example .env
    ```
 
-4. Run the entire infrastructure in dev mode. **Note**: if you have an existing database, this command wipes it. Also, this will fail on the very first run. Please run it again.
+5. Run the entire infrastructure in dev mode. **Note**: if you have an existing database, this command wipes it. Also, this will fail on the very first run. Please run it again.
 
    ```bash
    pnpm run dx # first run only (resets db, docker containers, etc...)
@@ -146,13 +152,11 @@ Requirements
 
    You will be asked whether you want to reset Postgres and ClickHouse. Confirm both with 'Y' and press enter.
 
-5. Open the web app in your browser to start using Langfuse:
-
+6. Open the web app in your browser to start using Langfuse:
    - [Sign up page, http://localhost:3000](http://localhost:3000)
    - [Demo project, http://localhost:3000/project/7a88fb47-b4e2-43b8-a06c-a5ce950dc53a](http://localhost:3000/project/7a88fb47-b4e2-43b8-a06c-a5ce950dc53a)
 
-6. Log in as a test user:
-
+7. Log in as a test user:
    - Username: `demo@langfuse.com`
    - Password: `password`
 
@@ -176,6 +180,8 @@ pnpm run db:seed:examples
   pnpm install
   pnpm run dev
   pnpm --filter=web run dev # execute command only in one package
+  pnpm tc                   # fast typecheck all packages
+  pnpm build:check          # Full Next.js build to alternate dir (can run parallel with dev server)
   ```
 
   In the root `package.json`, you can find scripts which are executed with turbo e.g. `turbo run dev`. These scripts are executed with the help of Turbo. Turbo executes the commands in all packages taking care of the correct order of execution. Task definitions can be found in the `turbo.config.js` file.
@@ -241,14 +247,16 @@ We're using Jest with in the `web` package. Therefore, if you want to provide an
 There are three types of unit tests:
 
 - `test-sync`
-- `test-async`
+- `test` (for async folder tests)
 - `test-client`
 
 To run a specific test, for example the test: `"should handle special characters in prompt names"` in `prompts.v2.servertest.ts`, run:
 
 ```sh
 cd web  # or with --filter=web
-pnpm test-sync --testPathPattern="prompts\.v2\.servertest" --testNamePattern="should handle special characters in prompt names"
+pnpm test-sync --testPathPatterns="prompts\.v2\.servertest" --testNamePattern="should handle special characters in prompt names"
+# for async folder tests:
+pnpm test -- --testPathPatterns="observations-api" --testNamePattern="should fetch all observations"
 ```
 
 To run all tests:

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2023--2024 Langfuse GmbH
+Copyright (c) 2023-2025 Langfuse GmbH
 
 Portions of this software are licensed as follows:
 

README.cn.md

@@ -91,12 +91,11 @@ Langfuse 是一个 **开源 LLM 工程** 平台。它帮助团队协作 **开发
 ![Langfuse 概览](https://langfuse.com/images/docs/github-readme/github-feature-overview.png)
 
 - [LLM 应用可观察性](https://langfuse.com/docs/tracing)：为你的应用插入仪表代码，并开始将追踪数据传送到 Langfuse，从而追踪 LLM 调用及应用中其他相关逻辑（如检索、嵌入或代理操作）。检查并调试复杂日志及用户会话。试试互动的 [演示](https://langfuse.com/docs/demo) 看看效果。
-  
-- [提示管理](https://langfuse.com/docs/prompts/get-started) 帮助你集中管理、版本控制并协作迭代提示。得益于服务器和客户端的高效缓存，你可以在不增加延迟的情况下反复迭代提示。
+- [提示管理](https://langfuse.com/docs/prompt-management/get-started) 帮助你集中管理、版本控制并协作迭代提示。得益于服务器和客户端的高效缓存，你可以在不增加延迟的情况下反复迭代提示。
 
-- [评估](https://langfuse.com/docs/scores/overview) 是 LLM 应用开发流程的关键组成部分，Langfuse 能够满足你的多样需求。它支持 LLM 作为"裁判"、用户反馈收集、手动标注以及通过 API/SDK 实现自定义评估流程。
+- [评估](https://langfuse.com/docs/evaluation/overview) 是 LLM 应用开发流程的关键组成部分，Langfuse 能够满足你的多样需求。它支持 LLM 作为"裁判"、用户反馈收集、手动标注以及通过 API/SDK 实现自定义评估流程。
 
-- [数据集](https://langfuse.com/docs/datasets/overview) 为评估你的 LLM 应用提供测试集和基准。它们支持持续改进、部署前测试、结构化实验、灵活评估，并能与 LangChain、LlamaIndex 等框架无缝整合。
+- [数据集](https://langfuse.com/docs/evaluation/dataset-runs/datasets) 为评估你的 LLM 应用提供测试集和基准。它们支持持续改进、部署前测试、结构化实验、灵活评估，并能与 LangChain、LlamaIndex 等框架无缝整合。
 
 - [LLM 试玩平台](https://langfuse.com/docs/playground) 是用于测试和迭代提示及模型配置的工具，缩短反馈周期，加速开发。当你在追踪中发现异常结果时，可以直接跳转至试玩平台进行调整。
 
@@ -122,14 +121,14 @@ Langfuse 是一个 **开源 LLM 工程** 平台。它帮助团队协作 **开发
 
 - [本地（docker compose）](https://langfuse.com/self-hosting/local)：使用 Docker Compose 在你的机器上于 5 分钟内运行 Langfuse。
 
-  ````bash:README.md/docker-compose
+  ```bash:README.md/docker-compose
   # 获取最新的 Langfuse 仓库副本
   git clone https://github.com/langfuse/langfuse.git
   cd langfuse
 
   # 运行 Langfuse 的 docker compose
   docker compose up
-  `````
+  ```
 
 - [Kubernetes（Helm）](https://langfuse.com/self-hosting/kubernetes-helm)：使用 Helm 在 Kubernetes 集群上部署 Langfuse。这是推荐的生产环境部署方式。
 
@@ -145,40 +144,40 @@ Langfuse 是一个 **开源 LLM 工程** 平台。它帮助团队协作 **开发
 
 ### 主要集成：
 
-| 集成                                                                   | 支持语言/平台            | 描述                                                                                                                                       |
-| ---------------------------------------------------------------------- | ------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------- |
-| [SDK](https://langfuse.com/docs/sdk)                                    | Python, JS/TS            | 使用 SDK 进行手动仪表化，实现全面灵活性。                                                                                                   |
-| [OpenAI](https://langfuse.com/docs/integrations/openai)                 | Python, JS/TS            | 通过直接替换 OpenAI SDK 实现自动仪表化。                                                                                                    |
-| [Langchain](https://langfuse.com/docs/integrations/langchain)           | Python, JS/TS            | 通过传入回调处理器至 Langchain 应用实现自动仪表化。                                                                                         |
-| [LlamaIndex](https://langfuse.com/docs/integrations/llama-index/get-started) | Python                   | 通过 LlamaIndex 回调系统实现自动仪表化。                                                                                                    |
-| [Haystack](https://langfuse.com/docs/integrations/haystack)             | Python                   | 通过 Haystack 内容追踪系统实现自动仪表化。                                                                                                  |
-| [LiteLLM](https://langfuse.com/docs/integrations/litellm)               | Python, JS/TS (仅代理)     | 允许使用任何 LLM 替代 GPT。支持 Azure、OpenAI、Cohere、Anthropic、Ollama、VLLM、Sagemaker、HuggingFace、Replicate（100+ LLMs）。         |
-| [Vercel AI SDK](https://langfuse.com/docs/integrations/vercel-ai-sdk)     | JS/TS                    | 基于 TypeScript 的工具包，帮助开发者使用 React、Next.js、Vue、Svelte 和 Node.js 构建 AI 驱动的应用。                                           |
-| [API](https://langfuse.com/docs/api)                                    |                          | 直接调用公共 API。提供 OpenAPI 规格。                                                                                                       |
-| [Google VertexAI 和 Gemini](https://langfuse.com/docs/integrations/google-vertex-ai) | 模型                | 在 Google 上运行基础模型和微调模型。                                                                         |
+| 集成                                                                                 | 支持语言/平台          | 描述                                                                                                                             |
+| ------------------------------------------------------------------------------------ | ---------------------- | -------------------------------------------------------------------------------------------------------------------------------- |
+| [SDK](https://langfuse.com/docs/sdk)                                                 | Python, JS/TS          | 使用 SDK 进行手动仪表化，实现全面灵活性。                                                                                        |
+| [OpenAI](https://langfuse.com/integrations/model-providers/openai-py)                | Python, JS/TS          | 通过直接替换 OpenAI SDK 实现自动仪表化。                                                                                         |
+| [Langchain](https://langfuse.com/docs/integrations/langchain)                        | Python, JS/TS          | 通过传入回调处理器至 Langchain 应用实现自动仪表化。                                                                              |
+| [LlamaIndex](https://langfuse.com/docs/integrations/llama-index/get-started)         | Python                 | 通过 LlamaIndex 回调系统实现自动仪表化。                                                                                         |
+| [Haystack](https://langfuse.com/docs/integrations/haystack)                          | Python                 | 通过 Haystack 内容追踪系统实现自动仪表化。                                                                                       |
+| [LiteLLM](https://langfuse.com/docs/integrations/litellm)                            | Python, JS/TS (仅代理) | 允许使用任何 LLM 替代 GPT。支持 Azure、OpenAI、Cohere、Anthropic、Ollama、VLLM、Sagemaker、HuggingFace、Replicate（100+ LLMs）。 |
+| [Vercel AI SDK](https://langfuse.com/docs/integrations/vercel-ai-sdk)                | JS/TS                  | 基于 TypeScript 的工具包，帮助开发者使用 React、Next.js、Vue、Svelte 和 Node.js 构建 AI 驱动的应用。                             |
+| [API](https://langfuse.com/docs/api)                                                 |                        | 直接调用公共 API。提供 OpenAPI 规格。                                                                                            |
+| [Google VertexAI 和 Gemini](https://langfuse.com/docs/integrations/google-vertex-ai) | 模型                   | 在 Google 上运行基础模型和微调模型。                                                                                             |
 
 ### 与 Langfuse 集成的软件包：
 
-| 名称                                                                   | 类型                | 描述                                                                                                     |
-| ---------------------------------------------------------------------- | ------------------- | -------------------------------------------------------------------------------------------------------- |
-| [Instructor](https://langfuse.com/docs/integrations/instructor)         | 库                  | 用于获取结构化 LLM 输出（JSON、Pydantic）的库。                                                         |
-| [DSPy](https://langfuse.com/docs/integrations/dspy)                     | 库                  | 一个系统性优化语言模型提示和权重的框架。                                                                 |
-| [Amazon Bedrock](https://langfuse.com/docs/integrations/amazon-bedrock) | 模型                | 在 AWS 上运行基础模型和微调模型。                                                                         |
-| [Mirascope](https://langfuse.com/docs/integrations/mirascope)           | 库                  | 构建 LLM 应用的 Python 工具包。                                                                           |
-| [Ollama](https://langfuse.com/docs/integrations/ollama)                 | 模型（本地）         | 在你的机器上轻松运行开源 LLM。                                                                            |
-| [AutoGen](https://langfuse.com/docs/integrations/autogen)               | 代理框架             | 用于构建分布式代理的开源 LLM 平台。                                                                       |
-| [Flowise](https://langfuse.com/docs/integrations/flowise)               | 聊天/代理界面         | 基于 JS/TS 的无代码构建器，用于定制化 LLM 流程。                                                          |
-| [Langflow](https://langfuse.com/docs/integrations/langflow)             | 聊天/代理界面         | 基于 Python 的 LangChain 用户界面，采用 react-flow 设计，提供便捷的实验与原型构建体验。                   |
-| [Dify](https://langfuse.com/docs/integrations/dify)                     | 聊天/代理界面         | 带有无代码构建器的开源 LLM 应用开发平台。                                                                 |
-| [OpenWebUI](https://langfuse.com/docs/integrations/openwebui)           | 聊天/代理界面         | 自托管的 LLM 聊天网页界面，支持包括自托管和本地模型在内的多种 LLM 运行器。                                |
-| [Promptfoo](https://langfuse.com/docs/integrations/promptfoo)           | 工具                | 开源 LLM 测试平台。                                                                                       |
-| [LobeChat](https://langfuse.com/docs/integrations/lobechat)             | 聊天/代理界面         | 开源聊天机器人平台。                                                                                       |
-| [Vapi](https://langfuse.com/docs/integrations/vapi)                     | 平台                | 开源语音 AI 平台。                                                                                        |
-| [Inferable](https://langfuse.com/docs/integrations/other/inferable)     | 代理                | 构建分布式代理的开源 LLM 平台。                                                                            |
-| [Gradio](https://langfuse.com/docs/integrations/other/gradio)           | 聊天/代理界面         | 开源 Python 库，可用于构建类似聊天 UI 的网页界面。                                                        |
-| [Goose](https://langfuse.com/docs/integrations/goose)                   | 代理                | 构建分布式代理的开源 LLM 平台。                                                                            |
-| [smolagents](https://langfuse.com/docs/integrations/smolagents)         | 代理                | 开源 AI 代理框架。                                                                                        |
-| [CrewAI](https://langfuse.com/docs/integrations/crewai)                 | 代理                | 多代理框架，用于实现代理之间的协作与工具调用。                                                           |
+| 名称                                                                    | 类型          | 描述                                                                                    |
+| ----------------------------------------------------------------------- | ------------- | --------------------------------------------------------------------------------------- |
+| [Instructor](https://langfuse.com/docs/integrations/instructor)         | 库            | 用于获取结构化 LLM 输出（JSON、Pydantic）的库。                                         |
+| [DSPy](https://langfuse.com/docs/integrations/dspy)                     | 库            | 一个系统性优化语言模型提示和权重的框架。                                                |
+| [Amazon Bedrock](https://langfuse.com/docs/integrations/amazon-bedrock) | 模型          | 在 AWS 上运行基础模型和微调模型。                                                       |
+| [Mirascope](https://langfuse.com/docs/integrations/mirascope)           | 库            | 构建 LLM 应用的 Python 工具包。                                                         |
+| [Ollama](https://langfuse.com/docs/integrations/ollama)                 | 模型（本地）  | 在你的机器上轻松运行开源 LLM。                                                          |
+| [AutoGen](https://langfuse.com/docs/integrations/autogen)               | 代理框架      | 用于构建分布式代理的开源 LLM 平台。                                                     |
+| [Flowise](https://langfuse.com/docs/integrations/flowise)               | 聊天/代理界面 | 基于 JS/TS 的无代码构建器，用于定制化 LLM 流程。                                        |
+| [Langflow](https://langfuse.com/docs/integrations/langflow)             | 聊天/代理界面 | 基于 Python 的 LangChain 用户界面，采用 react-flow 设计，提供便捷的实验与原型构建体验。 |
+| [Dify](https://langfuse.com/docs/integrations/dify)                     | 聊天/代理界面 | 带有无代码构建器的开源 LLM 应用开发平台。                                               |
+| [OpenWebUI](https://langfuse.com/docs/integrations/openwebui)           | 聊天/代理界面 | 自托管的 LLM 聊天网页界面，支持包括自托管和本地模型在内的多种 LLM 运行器。              |
+| [Promptfoo](https://langfuse.com/docs/integrations/promptfoo)           | 工具          | 开源 LLM 测试平台。                                                                     |
+| [LobeChat](https://langfuse.com/docs/integrations/lobechat)             | 聊天/代理界面 | 开源聊天机器人平台。                                                                    |
+| [Vapi](https://langfuse.com/docs/integrations/vapi)                     | 平台          | 开源语音 AI 平台。                                                                      |
+| [Inferable](https://langfuse.com/docs/integrations/other/inferable)     | 代理          | 构建分布式代理的开源 LLM 平台。                                                         |
+| [Gradio](https://langfuse.com/docs/integrations/other/gradio)           | 聊天/代理界面 | 开源 Python 库，可用于构建类似聊天 UI 的网页界面。                                      |
+| [Goose](https://langfuse.com/docs/integrations/goose)                   | 代理          | 构建分布式代理的开源 LLM 平台。                                                         |
+| [smolagents](https://langfuse.com/docs/integrations/smolagents)         | 代理          | 开源 AI 代理框架。                                                                      |
+| [CrewAI](https://langfuse.com/docs/integrations/crewai)                 | 代理          | 多代理框架，用于实现代理之间的协作与工具调用。                                          |
 
 ## 🚀 快速入门
 
@@ -192,25 +191,25 @@ Langfuse 是一个 **开源 LLM 工程** 平台。它帮助团队协作 **开发
 
 ### 2️⃣ 记录你的第一个 LLM 调用
 
-使用 [<code>@observe()</code> 装饰器](https://langfuse.com/docs/sdk/python/decorators) 可轻松跟踪任何 Python LLM 应用。在本快速入门中，我们还使用了 Langfuse 的 [OpenAI 集成](https://langfuse.com/docs/integrations/openai) 来自动捕获所有模型参数。
+使用 [<code>@observe()</code> 装饰器](https://langfuse.com/docs/sdk/python/decorators) 可轻松跟踪任何 Python LLM 应用。在本快速入门中，我们还使用了 Langfuse 的 [OpenAI 集成](https://langfuse.com/integrations/model-providers/openai-py) 来自动捕获所有模型参数。
 
 > [!提示]
 > 不使用 OpenAI？请访问 [我们的文档](https://langfuse.com/docs/get-started#log-your-first-llm-call-to-langfuse) 了解如何记录其他模型和框架。
 
 安装依赖：
 
-````bash
+```bash
 pip install langfuse openai
-````
+```
 
 配置环境变量（创建名为 **.env** 的文件）：
 
-````bash:.env
+```bash:.env
 LANGFUSE_SECRET_KEY="sk-lf-..."
 LANGFUSE_PUBLIC_KEY="pk-lf-..."
-LANGFUSE_HOST="https://cloud.langfuse.com" # 🇪🇺 欧盟区域
-# LANGFUSE_HOST="https://us.cloud.langfuse.com" # 🇺🇸 美洲区域
-````
+LANGFUSE_BASE_URL="https://cloud.langfuse.com" # 🇪🇺 欧盟区域
+# LANGFUSE_BASE_URL="https://us.cloud.langfuse.com" # 🇺🇸 美洲区域
+```
 
 创建示例代码（文件名：**main.py**）：
 
@@ -230,7 +229,7 @@ def main():
     return story()
 
 main()
-````
+```
 
 ### 3️⃣ 在 Langfuse 中查看追踪记录
 
@@ -246,7 +245,7 @@ _[Langfuse 中的公共示例追踪](https://cloud.langfuse.com/project/cloramnk
 
 ## ⭐️ 给我们加星
 
-![为 Langfuse 加星](https://langfuse.com/images/docs/github-readme/github-star-howto.gif)
+![star-langfuse-on-github](https://github.com/user-attachments/assets/79a1d816-d229-4526-aecc-097d4a19f1ad)
 
 ## 💭 支持
 
@@ -289,51 +288,51 @@ _[Langfuse 中的公共示例追踪](https://cloud.langfuse.com/project/cloramnk
 
 以下是使用 Langfuse 的顶级开源 Python 项目，按星标数排名（[来源](https://github.com/langfuse/langfuse-docs/blob/main/components-mdx/dependents)）：
 
-| 仓库                                                                                                                                                                                                                                                             | 星数  |
-| :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----: |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/127165244?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langgenius](https://github.com/langgenius) / [dify](https://github.com/langgenius/dify)                                      | 54865 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [open-webui](https://github.com/open-webui/open-webui)                            | 51531 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/131470832?s=40&v=4" width="20" height="20" alt=""> &nbsp; [lobehub](https://github.com/lobehub) / [lobe-chat](https://github.com/lobehub/lobe-chat)                                   | 49003 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85702467?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langflow-ai](https://github.com/langflow-ai) / [langflow](https://github.com/langflow-ai/langflow)                              | 39093 |
+| 仓库                                                                                                                                                                                                                                                                |  星数 |
+| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----: |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/127165244?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langgenius](https://github.com/langgenius) / [dify](https://github.com/langgenius/dify)                                            | 54865 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [open-webui](https://github.com/open-webui/open-webui)                                | 51531 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/131470832?s=40&v=4" width="20" height="20" alt=""> &nbsp; [lobehub](https://github.com/lobehub) / [lobe-chat](https://github.com/lobehub/lobe-chat)                                           | 49003 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85702467?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langflow-ai](https://github.com/langflow-ai) / [langflow](https://github.com/langflow-ai/langflow)                                  | 39093 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/130722866?s=40&v=4" width="20" height="20" alt=""> &nbsp; [run-llama](https://github.com/run-llama) / [llama_index](https://github.com/run-llama/llama_index)                                 | 37368 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [danny-avila](https://github.com/danny-avila) / [LibreChat](https://github.com/danny-avila/LibreChat)                               | 33142 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139558948?s=40&v=4" width="20" height="20" alt=""> &nbsp; [chatchat-space](https://github.com/chatchat-space) / [Langchain-Chatchat](https://github.com/chatchat-space/Langchain-Chatchat)    | 32486 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/128289781?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FlowiseAI](https://github.com/FlowiseAI) / [Flowise](https://github.com/FlowiseAI/Flowise)                                      | 32448 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31035808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mindsdb](https://github.com/mindsdb) / [mindsdb](https://github.com/mindsdb/mindsdb)                                             | 26931 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/119600397?s=40&v=4" width="20" height="20" alt=""> &nbsp; [twentyhq](https://github.com/twentyhq) / [twenty](https://github.com/twentyhq/twenty)                                   | 24195 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog](https://github.com/PostHog/posthog)                                             | 22618 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/121462774?s=40&v=4" width="20" height="20" alt=""> &nbsp; [BerriAI](https://github.com/BerriAI) / [litellm](https://github.com/BerriAI/litellm)                                    | 15151 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/179202840?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mediar-ai](https://github.com/mediar-ai) / [screenpipe](https://github.com/mediar-ai/screenpipe)                            | 11037 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/105877416?s=40&v=4" width="20" height="20" alt=""> &nbsp; [formbricks](https://github.com/formbricks) / [formbricks](https://github.com/formbricks/formbricks)                         |  9386 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/76263028?s=40&v=4" width="20" height="20" alt=""> &nbsp; [anthropics](https://github.com/anthropics) / [courses](https://github.com/anthropics/courses)                                |  8385 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/78410652?s=40&v=4" width="20" height="20" alt=""> &nbsp; [GreyDGL](https://github.com/GreyDGL) / [PentestGPT](https://github.com/GreyDGL/PentestGPT)                           |  7374 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/152537519?s=40&v=4" width="20" height="20" alt=""> &nbsp; [superagent-ai](https://github.com/superagent-ai) / [superagent](https://github.com/superagent-ai/superagent)               |  5391 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/137907881?s=40&v=4" width="20" height="20" alt=""> &nbsp; [promptfoo](https://github.com/promptfoo) / [promptfoo](https://github.com/promptfoo/promptfoo)                           |  4976 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/157326433?s=40&v=4" width="20" height="20" alt=""> &nbsp; [onlook-dev](https://github.com/onlook-dev) / [onlook](https://github.com/onlook-dev/onlook)                                  |  4141 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/7250217?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Canner](https://github.com/Canner) / [WrenAI](https://github.com/Canner/WrenAI)                                      |  2526 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/11855343?s=40&v=4" width="20" height="20" alt=""> &nbsp; [pingcap](https://github.com/pingcap) / [autoflow](https://github.com/pingcap/autoflow)                                  |  2061 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85268109?s=40&v=4" width="20" height="20" alt=""> &nbsp; [MLSysOps](https://github.com/MLSysOps) / [MLE-agent](https://github.com/MLSysOps/MLE-agent)                         |  1161 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [pipelines](https://github.com/open-webui/pipelines)                          |  1100 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/18422723?s=40&v=4" width="20" height="20" alt=""> &nbsp; [alishobeiri](https://github.com/alishobeiri) / [thread](https://github.com/alishobeiri/thread)                           |  1074 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/125468716?s=40&v=4" width="20" height="20" alt=""> &nbsp; [topoteretes](https://github.com/topoteretes) / [cognee](https://github.com/topoteretes/cognee)                          |   971 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/188657705?s=40&v=4" width="20" height="20" alt=""> &nbsp; [bRAGAI](https://github.com/bRAGAI) / [bRAG-langchain](https://github.com/bRAGAI/bRAG-langchain)                         |   823 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169500408?s=40&v=4" width="20" height="20" alt=""> &nbsp; [opslane](https://github.com/opslane) / [opslane](https://github.com/opslane/opslane)                             |   677 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/151867818?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dynamiq-ai](https://github.com/dynamiq-ai) / [dynamiq](https://github.com/dynamiq-ai/dynamiq)                         |   639 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/48585267?s=40&v=4" width="20" height="20" alt=""> &nbsp; [theopenconversationkit](https://github.com/theopenconversationkit) / [tock](https://github.com/theopenconversationkit/tock) |   514 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/20493493?s=40&v=4" width="20" height="20" alt=""> &nbsp; [andysingal](https://github.com/andysingal) / [llm-course](https://github.com/andysingal/llm-course)                         |   394 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/132396805?s=40&v=4" width="20" height="20" alt=""> &nbsp; [phospho-app](https://github.com/phospho-app) / [phospho](https://github.com/phospho-app/phospho)                           |   384 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/178644984?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sentient-engineering](https://github.com/sentient-engineering) / [agent-q](https://github.com/sentient-engineering/agent-q) |   370 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/168552753?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sql-agi](https://github.com/sql-agi) / [DB-GPT](https://github.com/sql-agi/DB-GPT)                          |   324 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog-foss](https://github.com/PostHog/posthog-foss)                           |   305 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/154247157?s=40&v=4" width="20" height="20" alt=""> &nbsp; [vespperhq](https://github.com/vespperhq) / [vespper](https://github.com/vespperhq/vespper)                         |   304 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/185116535?s=40&v=4" width="20" height="20" alt=""> &nbsp; [block](https://github.com/block) / [goose](https://github.com/block/goose)                                  |   295 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/609489?s=40&v=4" width="20" height="20" alt=""> &nbsp; [aorwall](https://github.com/aorwall) / [moatless-tools](https://github.com/aorwall/moatless-tools)                 |   291 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/2357342?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dmayboroda](https://github.com/dmayboroda) / [minima](https://github.com/dmayboroda/minima)                          |   221 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/66303003?s=40&v=4" width="20" height="20" alt=""> &nbsp; [RobotecAI](https://github.com/RobotecAI) / [rai](https://github.com/RobotecAI/rai)                              |   172 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/148684274?s=40&v=4" width="20" height="20" alt=""> &nbsp; [i-am-alice](https://github.com/i-am-alice) / [3rd-devs](https://github.com/i-am-alice/3rd-devs)                   |   148 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/171735272?s=40&v=4" width="20" height="20" alt=""> &nbsp; [8090-inc](https://github.com/8090-inc) / [xrx-sample-apps](https://github.com/8090-inc/xrx-sample-apps)       |   138 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/104478511?s=40&v=4" width="20" height="20" alt=""> &nbsp; [babelcloud](https://github.com/babelcloud) / [LLM-RGB](https://github.com/babelcloud/LLM-RGB)                  |   135 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/15125613?s=40&v=4" width="20" height="20" alt=""> &nbsp; [souzatharsis](https://github.com/souzatharsis) / [tamingLLMs](https://github.com/souzatharsis/tamingLLMs)        |   129 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [LibreChat-AI](https://github.com/LibreChat-AI) / [librechat.ai](https://github.com/LibreChat-AI/librechat.ai)   |   128 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/128289781?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FlowiseAI](https://github.com/FlowiseAI) / [Flowise](https://github.com/FlowiseAI/Flowise)                                         | 32448 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31035808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mindsdb](https://github.com/mindsdb) / [mindsdb](https://github.com/mindsdb/mindsdb)                                                | 26931 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/119600397?s=40&v=4" width="20" height="20" alt=""> &nbsp; [twentyhq](https://github.com/twentyhq) / [twenty](https://github.com/twentyhq/twenty)                                              | 24195 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog](https://github.com/PostHog/posthog)                                                | 22618 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/121462774?s=40&v=4" width="20" height="20" alt=""> &nbsp; [BerriAI](https://github.com/BerriAI) / [litellm](https://github.com/BerriAI/litellm)                                               | 15151 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/179202840?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mediar-ai](https://github.com/mediar-ai) / [screenpipe](https://github.com/mediar-ai/screenpipe)                                   | 11037 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/105877416?s=40&v=4" width="20" height="20" alt=""> &nbsp; [formbricks](https://github.com/formbricks) / [formbricks](https://github.com/formbricks/formbricks)                                |  9386 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/76263028?s=40&v=4" width="20" height="20" alt=""> &nbsp; [anthropics](https://github.com/anthropics) / [courses](https://github.com/anthropics/courses)                                       |  8385 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/78410652?s=40&v=4" width="20" height="20" alt=""> &nbsp; [GreyDGL](https://github.com/GreyDGL) / [PentestGPT](https://github.com/GreyDGL/PentestGPT)                                          |  7374 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/152537519?s=40&v=4" width="20" height="20" alt=""> &nbsp; [superagent-ai](https://github.com/superagent-ai) / [superagent](https://github.com/superagent-ai/superagent)                       |  5391 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/137907881?s=40&v=4" width="20" height="20" alt=""> &nbsp; [promptfoo](https://github.com/promptfoo) / [promptfoo](https://github.com/promptfoo/promptfoo)                                     |  4976 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/157326433?s=40&v=4" width="20" height="20" alt=""> &nbsp; [onlook-dev](https://github.com/onlook-dev) / [onlook](https://github.com/onlook-dev/onlook)                                        |  4141 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/7250217?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Canner](https://github.com/Canner) / [WrenAI](https://github.com/Canner/WrenAI)                                                      |  2526 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/11855343?s=40&v=4" width="20" height="20" alt=""> &nbsp; [pingcap](https://github.com/pingcap) / [autoflow](https://github.com/pingcap/autoflow)                                              |  2061 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85268109?s=40&v=4" width="20" height="20" alt=""> &nbsp; [MLSysOps](https://github.com/MLSysOps) / [MLE-agent](https://github.com/MLSysOps/MLE-agent)                                         |  1161 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [pipelines](https://github.com/open-webui/pipelines)                                  |  1100 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/18422723?s=40&v=4" width="20" height="20" alt=""> &nbsp; [alishobeiri](https://github.com/alishobeiri) / [thread](https://github.com/alishobeiri/thread)                                      |  1074 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/125468716?s=40&v=4" width="20" height="20" alt=""> &nbsp; [topoteretes](https://github.com/topoteretes) / [cognee](https://github.com/topoteretes/cognee)                                     |   971 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/188657705?s=40&v=4" width="20" height="20" alt=""> &nbsp; [bRAGAI](https://github.com/bRAGAI) / [bRAG-langchain](https://github.com/bRAGAI/bRAG-langchain)                                    |   823 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169500408?s=40&v=4" width="20" height="20" alt=""> &nbsp; [opslane](https://github.com/opslane) / [opslane](https://github.com/opslane/opslane)                                               |   677 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/151867818?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dynamiq-ai](https://github.com/dynamiq-ai) / [dynamiq](https://github.com/dynamiq-ai/dynamiq)                                      |   639 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/48585267?s=40&v=4" width="20" height="20" alt=""> &nbsp; [theopenconversationkit](https://github.com/theopenconversationkit) / [tock](https://github.com/theopenconversationkit/tock)         |   514 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/20493493?s=40&v=4" width="20" height="20" alt=""> &nbsp; [andysingal](https://github.com/andysingal) / [llm-course](https://github.com/andysingal/llm-course)                                 |   394 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/132396805?s=40&v=4" width="20" height="20" alt=""> &nbsp; [phospho-app](https://github.com/phospho-app) / [phospho](https://github.com/phospho-app/phospho)                                   |   384 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/178644984?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sentient-engineering](https://github.com/sentient-engineering) / [agent-q](https://github.com/sentient-engineering/agent-q)        |   370 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/168552753?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sql-agi](https://github.com/sql-agi) / [DB-GPT](https://github.com/sql-agi/DB-GPT)                                                 |   324 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog-foss](https://github.com/PostHog/posthog-foss)                                      |   305 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/154247157?s=40&v=4" width="20" height="20" alt=""> &nbsp; [vespperhq](https://github.com/vespperhq) / [vespper](https://github.com/vespperhq/vespper)                                         |   304 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/185116535?s=40&v=4" width="20" height="20" alt=""> &nbsp; [block](https://github.com/block) / [goose](https://github.com/block/goose)                                                         |   295 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/609489?s=40&v=4" width="20" height="20" alt=""> &nbsp; [aorwall](https://github.com/aorwall) / [moatless-tools](https://github.com/aorwall/moatless-tools)                                    |   291 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/2357342?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dmayboroda](https://github.com/dmayboroda) / [minima](https://github.com/dmayboroda/minima)                                          |   221 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/66303003?s=40&v=4" width="20" height="20" alt=""> &nbsp; [RobotecAI](https://github.com/RobotecAI) / [rai](https://github.com/RobotecAI/rai)                                                  |   172 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/148684274?s=40&v=4" width="20" height="20" alt=""> &nbsp; [i-am-alice](https://github.com/i-am-alice) / [3rd-devs](https://github.com/i-am-alice/3rd-devs)                                    |   148 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/171735272?s=40&v=4" width="20" height="20" alt=""> &nbsp; [8090-inc](https://github.com/8090-inc) / [xrx-sample-apps](https://github.com/8090-inc/xrx-sample-apps)                            |   138 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/104478511?s=40&v=4" width="20" height="20" alt=""> &nbsp; [babelcloud](https://github.com/babelcloud) / [LLM-RGB](https://github.com/babelcloud/LLM-RGB)                                      |   135 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/15125613?s=40&v=4" width="20" height="20" alt=""> &nbsp; [souzatharsis](https://github.com/souzatharsis) / [tamingLLMs](https://github.com/souzatharsis/tamingLLMs)                           |   129 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/51827949?s=40&v=4" width="20" height="20" alt=""> &nbsp; [deepset-ai](https://github.com/deepset-ai) / [haystack-core-integrations](https://github.com/deepset-ai/haystack-core-integrations) |   126 |
 
 ## 🔒 安全与隐私
@@ -352,4 +351,7 @@ _[Langfuse 中的公共示例追踪](https://cloud.langfuse.com/project/cloramnk
 所有数据均不会与第三方共享，也不包含任何敏感信息。我们对这一过程保持高度透明，你可以在 [此处](/web/src/features/telemetry/index.ts) 查看我们收集的具体数据。
 
 你可以通过设置 `TELEMETRY_ENABLED=false` 来选择退出。
+
+```
+
 ```

README.ja.md

@@ -84,15 +84,15 @@ Langfuseは**数分でセルフホスト可能**で、**多くの実績を持つ
   複雑なログやユーザーセッションを解析・デバッグできます。  
   インタラクティブな[デモ](https://langfuse.com/docs/demo)で動作を確認してください。
 
-- **[プロンプト管理](https://langfuse.com/docs/prompts/get-started):**  
+- **[プロンプト管理](https://langfuse.com/docs/prompt-management/get-started):**  
   プロンプトを一元管理し、バージョン管理しながら共同で改善を行えます。  
   サーバーおよびクライアント側で強力なキャッシングを行うため、アプリケーションのレイテンシを増やすことなくプロンプトの改良が可能です。
 
-- **[評価](https://langfuse.com/docs/scores/overview):**  
+- **[評価](https://langfuse.com/docs/evaluation/overview):**  
   評価はLLMアプリケーション開発ワークフローの要であり、Langfuseは多様なニーズに対応します。  
   LLMを判定者として用いる方法、ユーザーフィードバックの収集、手動によるラベリング、API/SDKを通じたカスタム評価パイプラインをサポートします。
 
-- **[データセット](https://langfuse.com/docs/datasets/overview):**  
+- **[データセット](https://langfuse.com/docs/evaluation/dataset-runs/datasets):**  
   LLMアプリケーション評価用のテストセットやベンチマークを構築できます。  
   継続的な改善、事前デプロイテスト、構造化された実験、柔軟な評価、さらにLangChainやLlamaIndexなどとのシームレスな統合をサポートします。
 
@@ -151,40 +151,40 @@ Langfuseチームによるマネージドデプロイメント。充実した無
 
 ### 主なインテグレーション:
 
-| インテグレーション                                                                  | 対応言語・環境            | 説明                                                                                                                                           |
-| ----------------------------------------------------------------------------------- | ------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
-| [SDK](https://langfuse.com/docs/sdk)                                                  | Python, JS/TS             | SDKを利用して手動でインストゥルメンテーションを実装し、完全な柔軟性を提供します。                                                                  |
-| [OpenAI](https://langfuse.com/docs/integrations/openai)                               | Python, JS/TS             | OpenAI SDKのドロップイン置換による自動インストゥルメンテーションを実現します。                                                                   |
-| [Langchain](https://langfuse.com/docs/integrations/langchain)                         | Python, JS/TS             | Langchainアプリケーションにコールバックハンドラーを渡すことで自動的に計測します。                                                                 |
-| [LlamaIndex](https://langfuse.com/docs/integrations/llama-index/get-started)           | Python                    | LlamaIndexのコールバックシステムを介して自動的にインストゥルメントします。                                                                         |
-| [Haystack](https://langfuse.com/docs/integrations/haystack)                           | Python                    | Haystackのコンテンツトレースシステムを利用した自動インストゥルメンテーションを実現します。                                                          |
-| [LiteLLM](https://langfuse.com/docs/integrations/litellm)                             | Python, JS/TS (proxy only)| GPTのドロップイン置換として任意のLLMを使用できます。Azure、OpenAI、Cohere、Anthropic、Ollama、VLLM、Sagemaker、HuggingFace、Replicate（100+ LLM）に対応。 |
-| [Vercel AI SDK](https://langfuse.com/docs/integrations/vercel-ai-sdk)                   | JS/TS                     | React、Next.js、Vue、Svelte、Node.jsを使用してAI搭載アプリケーションの構築を支援するTypeScriptツールキットです。                                      |
-| [API](https://langfuse.com/docs/api)                                                  |                           | 公開APIを直接呼び出すことが可能です。OpenAPI仕様も利用できます。                                                                                 |
+| インテグレーション                                                           | 対応言語・環境             | 説明                                                                                                                                                      |
+| ---------------------------------------------------------------------------- | -------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| [SDK](https://langfuse.com/docs/sdk)                                         | Python, JS/TS              | SDKを利用して手動でインストゥルメンテーションを実装し、完全な柔軟性を提供します。                                                                         |
+| [OpenAI](https://langfuse.com/integrations/model-providers/openai-py)        | Python, JS/TS              | OpenAI SDKのドロップイン置換による自動インストゥルメンテーションを実現します。                                                                            |
+| [Langchain](https://langfuse.com/docs/integrations/langchain)                | Python, JS/TS              | Langchainアプリケーションにコールバックハンドラーを渡すことで自動的に計測します。                                                                         |
+| [LlamaIndex](https://langfuse.com/docs/integrations/llama-index/get-started) | Python                     | LlamaIndexのコールバックシステムを介して自動的にインストゥルメントします。                                                                                |
+| [Haystack](https://langfuse.com/docs/integrations/haystack)                  | Python                     | Haystackのコンテンツトレースシステムを利用した自動インストゥルメンテーションを実現します。                                                                |
+| [LiteLLM](https://langfuse.com/docs/integrations/litellm)                    | Python, JS/TS (proxy only) | GPTのドロップイン置換として任意のLLMを使用できます。Azure、OpenAI、Cohere、Anthropic、Ollama、VLLM、Sagemaker、HuggingFace、Replicate（100+ LLM）に対応。 |
+| [Vercel AI SDK](https://langfuse.com/docs/integrations/vercel-ai-sdk)        | JS/TS                      | React、Next.js、Vue、Svelte、Node.jsを使用してAI搭載アプリケーションの構築を支援するTypeScriptツールキットです。                                          |
+| [API](https://langfuse.com/docs/api)                                         |                            | 公開APIを直接呼び出すことが可能です。OpenAPI仕様も利用できます。                                                                                          |
 
 ### Langfuseと統合されているパッケージ:
 
-| 名前                                                                      | タイプ             | 説明                                                                                                      |
-| ------------------------------------------------------------------------- | ------------------ | --------------------------------------------------------------------------------------------------------- |
-| [Instructor](https://langfuse.com/docs/integrations/instructor)           | ライブラリ         | 構造化されたLLM出力（JSON、Pydantic）を取得するためのライブラリ                                            |
-| [DSPy](https://langfuse.com/docs/integrations/dspy)                       | ライブラリ         | LLMプロンプトや重み付けを体系的に最適化するためのフレームワーク                                             |
-| [Mirascope](https://langfuse.com/docs/integrations/mirascope)             | ライブラリ         | LLMアプリケーション構築用のPythonツールキット                                                               |
-| [Ollama](https://langfuse.com/docs/integrations/ollama)                   | モデル（ローカル） | オープンソースLLMを手軽にローカルで実行するためのツール                                                     |
-| [Amazon Bedrock](https://langfuse.com/docs/integrations/amazon-bedrock)     | モデル             | AWS上でファウンデーションモデルやファインチューニング済みモデルを実行                                         |
-| [Google VertexAI and Gemini](https://langfuse.com/docs/integrations/google-vertex-ai)     | モデル             | Google上でファウンデーションモデルやファインチューニング済みモデルを実行                                         |
-| [AutoGen](https://langfuse.com/docs/integrations/autogen)                 | エージェントフレームワーク | 分散型エージェント構築のためのオープンソースLLMプラットフォーム                                               |
-| [Flowise](https://langfuse.com/docs/integrations/flowise)                 | チャット/エージェント UI | JS/TSのノーコードビルダーで、カスタマイズ可能なLLMフローを構築                                              |
-| [Langflow](https://langfuse.com/docs/integrations/langflow)               | チャット/エージェント UI | PythonベースのUIで、react-flowを用いてLangChainの実験やプロトタイピングを容易に実現                           |
-| [Dify](https://langfuse.com/docs/integrations/dify)                       | チャット/エージェント UI | ノーコードでLLMアプリ開発が可能なオープンソースプラットフォーム                                               |
-| [OpenWebUI](https://langfuse.com/docs/integrations/openwebui)             | チャット/エージェント UI | 自前ホストおよびローカルモデルに対応するLLMチャットWeb UI                                                    |
-| [Promptfoo](https://langfuse.com/docs/integrations/promptfoo)             | ツール             | オープンソースのLLMテストプラットフォーム                                                                   |
-| [LobeChat](https://langfuse.com/docs/integrations/lobechat)               | チャット/エージェント UI | オープンソースのチャットボットプラットフォーム                                                               |
-| [Vapi](https://langfuse.com/docs/integrations/vapi)                       | プラットフォーム   | オープンソースの音声AIプラットフォーム                                                                       |
-| [Inferable](https://langfuse.com/docs/integrations/other/inferable)        | エージェント       | 分散型エージェント構築のためのオープンソースLLMプラットフォーム                                               |
-| [Gradio](https://langfuse.com/docs/integrations/other/gradio)             | チャット/エージェント UI | チャットUIなどのWebインターフェース構築のためのオープンソースPythonライブラリ                                |
-| [Goose](https://langfuse.com/docs/integrations/goose)                   | エージェント       | 分散型エージェント構築のためのオープンソースLLMプラットフォーム                                               |
-| [smolagents](https://langfuse.com/docs/integrations/smolagents)           | エージェント       | オープンソースのAIエージェントフレームワーク                                                                 |
-| [CrewAI](https://langfuse.com/docs/integrations/crewai)                   | エージェント       | エージェントの協調とツール利用を実現するマルチエージェントフレームワーク                                      |
+| 名前                                                                                  | タイプ                     | 説明                                                                                |
+| ------------------------------------------------------------------------------------- | -------------------------- | ----------------------------------------------------------------------------------- |
+| [Instructor](https://langfuse.com/docs/integrations/instructor)                       | ライブラリ                 | 構造化されたLLM出力（JSON、Pydantic）を取得するためのライブラリ                     |
+| [DSPy](https://langfuse.com/docs/integrations/dspy)                                   | ライブラリ                 | LLMプロンプトや重み付けを体系的に最適化するためのフレームワーク                     |
+| [Mirascope](https://langfuse.com/docs/integrations/mirascope)                         | ライブラリ                 | LLMアプリケーション構築用のPythonツールキット                                       |
+| [Ollama](https://langfuse.com/docs/integrations/ollama)                               | モデル（ローカル）         | オープンソースLLMを手軽にローカルで実行するためのツール                             |
+| [Amazon Bedrock](https://langfuse.com/docs/integrations/amazon-bedrock)               | モデル                     | AWS上でファウンデーションモデルやファインチューニング済みモデルを実行               |
+| [Google VertexAI and Gemini](https://langfuse.com/docs/integrations/google-vertex-ai) | モデル                     | Google上でファウンデーションモデルやファインチューニング済みモデルを実行            |
+| [AutoGen](https://langfuse.com/docs/integrations/autogen)                             | エージェントフレームワーク | 分散型エージェント構築のためのオープンソースLLMプラットフォーム                     |
+| [Flowise](https://langfuse.com/docs/integrations/flowise)                             | チャット/エージェント UI   | JS/TSのノーコードビルダーで、カスタマイズ可能なLLMフローを構築                      |
+| [Langflow](https://langfuse.com/docs/integrations/langflow)                           | チャット/エージェント UI   | PythonベースのUIで、react-flowを用いてLangChainの実験やプロトタイピングを容易に実現 |
+| [Dify](https://langfuse.com/docs/integrations/dify)                                   | チャット/エージェント UI   | ノーコードでLLMアプリ開発が可能なオープンソースプラットフォーム                     |
+| [OpenWebUI](https://langfuse.com/docs/integrations/openwebui)                         | チャット/エージェント UI   | 自前ホストおよびローカルモデルに対応するLLMチャットWeb UI                           |
+| [Promptfoo](https://langfuse.com/docs/integrations/promptfoo)                         | ツール                     | オープンソースのLLMテストプラットフォーム                                           |
+| [LobeChat](https://langfuse.com/docs/integrations/lobechat)                           | チャット/エージェント UI   | オープンソースのチャットボットプラットフォーム                                      |
+| [Vapi](https://langfuse.com/docs/integrations/vapi)                                   | プラットフォーム           | オープンソースの音声AIプラットフォーム                                              |
+| [Inferable](https://langfuse.com/docs/integrations/other/inferable)                   | エージェント               | 分散型エージェント構築のためのオープンソースLLMプラットフォーム                     |
+| [Gradio](https://langfuse.com/docs/integrations/other/gradio)                         | チャット/エージェント UI   | チャットUIなどのWebインターフェース構築のためのオープンソースPythonライブラリ       |
+| [Goose](https://langfuse.com/docs/integrations/goose)                                 | エージェント               | 分散型エージェント構築のためのオープンソースLLMプラットフォーム                     |
+| [smolagents](https://langfuse.com/docs/integrations/smolagents)                       | エージェント               | オープンソースのAIエージェントフレームワーク                                        |
+| [CrewAI](https://langfuse.com/docs/integrations/crewai)                               | エージェント               | エージェントの協調とツール利用を実現するマルチエージェントフレームワーク            |
 
 ## 🚀 クイックスタート
 
@@ -200,7 +200,7 @@ Langfuseチームによるマネージドデプロイメント。充実した無
 ### 2️⃣ 初めてのLLM呼び出しのログ記録
 
 [`@observe()` デコレーター](https://langfuse.com/docs/sdk/python/decorators)を利用することで、任意のPython製LLMアプリケーションのトレースが簡単に行えます。  
-このクイックスタートでは、Langfuseの[OpenAI統合](https://langfuse.com/docs/integrations/openai)を使用して、全てのモデルパラメータを自動で取得します。
+このクイックスタートでは、Langfuseの[OpenAI統合](https://langfuse.com/integrations/model-providers/openai-py)を使用して、全てのモデルパラメータを自動で取得します。
 
 > [!TIP]
 > OpenAIを利用していない場合は、[こちらのドキュメント](https://langfuse.com/docs/get-started#log-your-first-llm-call-to-langfuse)で、他のモデルやフレームワークのログ記録方法をご確認ください。
@@ -212,8 +212,8 @@ pip install langfuse openai
 ```bash filename=".env"
 LANGFUSE_SECRET_KEY="sk-lf-..."
 LANGFUSE_PUBLIC_KEY="pk-lf-..."
-LANGFUSE_HOST="https://cloud.langfuse.com" # 🇪🇺 EUリージョン
-# LANGFUSE_HOST="https://us.cloud.langfuse.com" # 🇺🇸 USリージョン
+LANGFUSE_BASE_URL="https://cloud.langfuse.com" # 🇪🇺 EUリージョン
+# LANGFUSE_BASE_URL="https://us.cloud.langfuse.com" # 🇺🇸 USリージョン
 ```
 
 ```python:/@observe()/ /from langfuse.openai import openai/ filename="main.py"
@@ -248,7 +248,7 @@ _[Langfuseの公開トレース例](https://cloud.langfuse.com/project/cloramnkj
 
 ## ⭐️ Star Langfuse
 
-![Star Langfuse](https://langfuse.com/images/docs/github-readme/github-star-howto.gif)
+![star-langfuse-on-github](https://github.com/user-attachments/assets/79a1d816-d229-4526-aecc-097d4a19f1ad)
 
 ## 💭 サポート
 
@@ -295,51 +295,51 @@ _[Langfuseの公開トレース例](https://cloud.langfuse.com/project/cloramnkj
 Langfuseを利用している主要なオープンソースPythonプロジェクト（スター数順）: ([出典](https://github.com/langfuse/langfuse-docs/blob/main/components-mdx/dependents))
 
 | リポジトリ                                                                                                                                                                                                                                                          | スター |
-| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----: |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/127165244?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langgenius](https://github.com/langgenius) / [dify](https://github.com/langgenius/dify)                                            | 54865 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [open-webui](https://github.com/open-webui/open-webui)                                | 51531 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/131470832?s=40&v=4" width="20" height="20" alt=""> &nbsp; [lobehub](https://github.com/lobehub) / [lobe-chat](https://github.com/lobehub/lobe-chat)                                           | 49003 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85702467?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langflow-ai](https://github.com/langflow-ai) / [langflow](https://github.com/langflow-ai/langflow)                                  | 39093 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/130722866?s=40&v=4" width="20" height="20" alt=""> &nbsp; [run-llama](https://github.com/run-llama) / [llama_index](https://github.com/run-llama/llama_index)                                 | 37368 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139558948?s=40&v=4" width="20" height="20" alt=""> &nbsp; [chatchat-space](https://github.com/chatchat-space) / [Langchain-Chatchat](https://github.com/chatchat-space/Langchain-Chatchat)    | 32486 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/128289781?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FlowiseAI](https://github.com/FlowiseAI) / [Flowise](https://github.com/FlowiseAI/Flowise)                                         | 32448 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31035808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mindsdb](https://github.com/mindsdb) / [mindsdb](https://github.com/mindsdb/mindsdb)                                                | 26931 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/119600397?s=40&v=4" width="20" height="20" alt=""> &nbsp; [twentyhq](https://github.com/twentyhq) / [twenty](https://github.com/twentyhq/twenty)                                              | 24195 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog](https://github.com/PostHog/posthog)                                                | 22618 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/121462774?s=40&v=4" width="20" height="20" alt=""> &nbsp; [BerriAI](https://github.com/BerriAI) / [litellm](https://github.com/BerriAI/litellm)                                               | 15151 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/179202840?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mediar-ai](https://github.com/mediar-ai) / [screenpipe](https://github.com/mediar-ai/screenpipe)                                   | 11037 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/105877416?s=40&v=4" width="20" height="20" alt=""> &nbsp; [formbricks](https://github.com/formbricks) / [formbricks](https://github.com/formbricks/formbricks)                                |  9386 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/76263028?s=40&v=4" width="20" height="20" alt=""> &nbsp; [anthropics](https://github.com/anthropics) / [courses](https://github.com/anthropics/courses)                                       |  8385 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/78410652?s=40&v=4" width="20" height="20" alt=""> &nbsp; [GreyDGL](https://github.com/GreyDGL) / [PentestGPT](https://github.com/GreyDGL/PentestGPT)                                          |  7374 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/152537519?s=40&v=4" width="20" height="20" alt=""> &nbsp; [superagent-ai](https://github.com/superagent-ai) / [superagent](https://github.com/superagent-ai/superagent)                       |  5391 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/137907881?s=40&v=4" width="20" height="20" alt=""> &nbsp; [promptfoo](https://github.com/promptfoo) / [promptfoo](https://github.com/promptfoo/promptfoo)                                     |  4976 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/157326433?s=40&v=4" width="20" height="20" alt=""> &nbsp; [onlook-dev](https://github.com/onlook-dev) / [onlook](https://github.com/onlook-dev/onlook)                                        |  4141 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/7250217?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Canner](https://github.com/Canner) / [WrenAI](https://github.com/Canner/WrenAI)                                                      |  2526 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/11855343?s=40&v=4" width="20" height="20" alt=""> &nbsp; [pingcap](https://github.com/pingcap) / [autoflow](https://github.com/pingcap/autoflow)                                              |  2061 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85268109?s=40&v=4" width="20" height="20" alt=""> &nbsp; [MLSysOps](https://github.com/MLSysOps) / [MLE-agent](https://github.com/MLSysOps/MLE-agent)                                         |  1161 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [pipelines](https://github.com/open-webui/pipelines)                                  |  1100 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/18422723?s=40&v=4" width="20" height="20" alt=""> &nbsp; [alishobeiri](https://github.com/alishobeiri) / [thread](https://github.com/alishobeiri/thread)                                      |  1074 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/125468716?s=40&v=4" width="20" height="20" alt=""> &nbsp; [topoteretes](https://github.com/topoteretes) / [cognee](https://github.com/topoteretes/cognee)                                     |   971 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/188657705?s=40&v=4" width="20" height="20" alt=""> &nbsp; [bRAGAI](https://github.com/bRAGAI) / [bRAG-langchain](https://github.com/bRAGAI/bRAG-langchain)                                    |   823 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169500408?s=40&v=4" width="20" height="20" alt=""> &nbsp; [opslane](https://github.com/opslane) / [opslane](https://github.com/opslane/opslane)                                               |   677 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/151867818?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dynamiq-ai](https://github.com/dynamiq-ai) / [dynamiq](https://github.com/dynamiq-ai/dynamiq)                                      |   639 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/48585267?s=40&v=4" width="20" height="20" alt=""> &nbsp; [theopenconversationkit](https://github.com/theopenconversationkit) / [tock](https://github.com/theopenconversationkit/tock)         |   514 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/20493493?s=40&v=4" width="20" height="20" alt=""> &nbsp; [andysingal](https://github.com/andysingal) / [llm-course](https://github.com/andysingal/llm-course)                                 |   394 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/132396805?s=40&v=4" width="20" height="20" alt=""> &nbsp; [phospho-app](https://github.com/phospho-app) / [phospho](https://github.com/phospho-app/phospho)                                   |   384 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/178644984?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sentient-engineering](https://github.com/sentient-engineering) / [agent-q](https://github.com/sentient-engineering/agent-q)        |   370 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/168552753?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sql-agi](https://github.com/sql-agi) / [DB-GPT](https://github.com/sql-agi/DB-GPT)                                                 |   324 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog-foss](https://github.com/PostHog/posthog-foss)                                      |   305 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/154247157?s=40&v=4" width="20" height="20" alt=""> &nbsp; [vespperhq](https://github.com/vespperhq) / [vespper](https://github.com/vespperhq/vespper)                                         |   304 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/185116535?s=40&v=4" width="20" height="20" alt=""> &nbsp; [block](https://github.com/block) / [goose](https://github.com/block/goose)                                                         |   295 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/609489?s=40&v=4" width="20" height="20" alt=""> &nbsp; [aorwall](https://github.com/aorwall) / [moatless-tools](https://github.com/aorwall/moatless-tools)                                    |   291 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/2357342?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dmayboroda](https://github.com/dmayboroda) / [minima](https://github.com/dmayboroda/minima)                                          |   221 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/66303003?s=40&v=4" width="20" height="20" alt=""> &nbsp; [RobotecAI](https://github.com/RobotecAI) / [rai](https://github.com/RobotecAI/rai)                                                  |   172 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/148684274?s=40&v=4" width="20" height="20" alt=""> &nbsp; [i-am-alice](https://github.com/i-am-alice) / [3rd-devs](https://github.com/i-am-alice/3rd-devs)                                    |   148 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/171735272?s=40&v=4" width="20" height="20" alt=""> &nbsp; [8090-inc](https://github.com/8090-inc) / [xrx-sample-apps](https://github.com/8090-inc/xrx-sample-apps)                            |   138 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/104478511?s=40&v=4" width="20" height="20" alt=""> &nbsp; [babelcloud](https://github.com/babelcloud) / [LLM-RGB](https://github.com/babelcloud/LLM-RGB)                                      |   135 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/15125613?s=40&v=4" width="20" height="20" alt=""> &nbsp; [souzatharsis](https://github.com/souzatharsis) / [tamingLLMs](https://github.com/souzatharsis/tamingLLMs)                           |   129 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [LibreChat-AI](https://github.com/LibreChat-AI) / [librechat.ai](https://github.com/LibreChat-AI/librechat.ai)                      |   128 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/51827949?s=40&v=4" width="20" height="20" alt=""> &nbsp; [deepset-ai](https://github.com/deepset-ai) / [haystack-core-integrations](https://github.com/deepset-ai/haystack-core-integrations) |   126 |
+| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | -----: |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/127165244?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langgenius](https://github.com/langgenius) / [dify](https://github.com/langgenius/dify)                                            |  54865 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [open-webui](https://github.com/open-webui/open-webui)                                |  51531 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/131470832?s=40&v=4" width="20" height="20" alt=""> &nbsp; [lobehub](https://github.com/lobehub) / [lobe-chat](https://github.com/lobehub/lobe-chat)                                           |  49003 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85702467?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langflow-ai](https://github.com/langflow-ai) / [langflow](https://github.com/langflow-ai/langflow)                                  |  39093 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/130722866?s=40&v=4" width="20" height="20" alt=""> &nbsp; [run-llama](https://github.com/run-llama) / [llama_index](https://github.com/run-llama/llama_index)                                 |  37368 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [danny-avila](https://github.com/danny-avila) / [LibreChat](https://github.com/danny-avila/LibreChat)                               |  33142 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139558948?s=40&v=4" width="20" height="20" alt=""> &nbsp; [chatchat-space](https://github.com/chatchat-space) / [Langchain-Chatchat](https://github.com/chatchat-space/Langchain-Chatchat)    |  32486 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/128289781?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FlowiseAI](https://github.com/FlowiseAI) / [Flowise](https://github.com/FlowiseAI/Flowise)                                         |  32448 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31035808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mindsdb](https://github.com/mindsdb) / [mindsdb](https://github.com/mindsdb/mindsdb)                                                |  26931 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/119600397?s=40&v=4" width="20" height="20" alt=""> &nbsp; [twentyhq](https://github.com/twentyhq) / [twenty](https://github.com/twentyhq/twenty)                                              |  24195 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog](https://github.com/PostHog/posthog)                                                |  22618 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/121462774?s=40&v=4" width="20" height="20" alt=""> &nbsp; [BerriAI](https://github.com/BerriAI) / [litellm](https://github.com/BerriAI/litellm)                                               |  15151 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/179202840?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mediar-ai](https://github.com/mediar-ai) / [screenpipe](https://github.com/mediar-ai/screenpipe)                                   |  11037 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/105877416?s=40&v=4" width="20" height="20" alt=""> &nbsp; [formbricks](https://github.com/formbricks) / [formbricks](https://github.com/formbricks/formbricks)                                |   9386 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/76263028?s=40&v=4" width="20" height="20" alt=""> &nbsp; [anthropics](https://github.com/anthropics) / [courses](https://github.com/anthropics/courses)                                       |   8385 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/78410652?s=40&v=4" width="20" height="20" alt=""> &nbsp; [GreyDGL](https://github.com/GreyDGL) / [PentestGPT](https://github.com/GreyDGL/PentestGPT)                                          |   7374 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/152537519?s=40&v=4" width="20" height="20" alt=""> &nbsp; [superagent-ai](https://github.com/superagent-ai) / [superagent](https://github.com/superagent-ai/superagent)                       |   5391 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/137907881?s=40&v=4" width="20" height="20" alt=""> &nbsp; [promptfoo](https://github.com/promptfoo) / [promptfoo](https://github.com/promptfoo/promptfoo)                                     |   4976 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/157326433?s=40&v=4" width="20" height="20" alt=""> &nbsp; [onlook-dev](https://github.com/onlook-dev) / [onlook](https://github.com/onlook-dev/onlook)                                        |   4141 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/7250217?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Canner](https://github.com/Canner) / [WrenAI](https://github.com/Canner/WrenAI)                                                      |   2526 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/11855343?s=40&v=4" width="20" height="20" alt=""> &nbsp; [pingcap](https://github.com/pingcap) / [autoflow](https://github.com/pingcap/autoflow)                                              |   2061 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85268109?s=40&v=4" width="20" height="20" alt=""> &nbsp; [MLSysOps](https://github.com/MLSysOps) / [MLE-agent](https://github.com/MLSysOps/MLE-agent)                                         |   1161 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [pipelines](https://github.com/open-webui/pipelines)                                  |   1100 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/18422723?s=40&v=4" width="20" height="20" alt=""> &nbsp; [alishobeiri](https://github.com/alishobeiri) / [thread](https://github.com/alishobeiri/thread)                                      |   1074 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/125468716?s=40&v=4" width="20" height="20" alt=""> &nbsp; [topoteretes](https://github.com/topoteretes) / [cognee](https://github.com/topoteretes/cognee)                                     |    971 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/188657705?s=40&v=4" width="20" height="20" alt=""> &nbsp; [bRAGAI](https://github.com/bRAGAI) / [bRAG-langchain](https://github.com/bRAGAI/bRAG-langchain)                                    |    823 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169500408?s=40&v=4" width="20" height="20" alt=""> &nbsp; [opslane](https://github.com/opslane) / [opslane](https://github.com/opslane/opslane)                                               |    677 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/151867818?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dynamiq-ai](https://github.com/dynamiq-ai) / [dynamiq](https://github.com/dynamiq-ai/dynamiq)                                      |    639 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/48585267?s=40&v=4" width="20" height="20" alt=""> &nbsp; [theopenconversationkit](https://github.com/theopenconversationkit) / [tock](https://github.com/theopenconversationkit/tock)         |    514 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/20493493?s=40&v=4" width="20" height="20" alt=""> &nbsp; [andysingal](https://github.com/andysingal) / [llm-course](https://github.com/andysingal/llm-course)                                 |    394 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/132396805?s=40&v=4" width="20" height="20" alt=""> &nbsp; [phospho-app](https://github.com/phospho-app) / [phospho](https://github.com/phospho-app/phospho)                                   |    384 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/178644984?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sentient-engineering](https://github.com/sentient-engineering) / [agent-q](https://github.com/sentient-engineering/agent-q)        |    370 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/168552753?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sql-agi](https://github.com/sql-agi) / [DB-GPT](https://github.com/sql-agi/DB-GPT)                                                 |    324 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog-foss](https://github.com/PostHog/posthog-foss)                                      |    305 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/154247157?s=40&v=4" width="20" height="20" alt=""> &nbsp; [vespperhq](https://github.com/vespperhq) / [vespper](https://github.com/vespperhq/vespper)                                         |    304 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/185116535?s=40&v=4" width="20" height="20" alt=""> &nbsp; [block](https://github.com/block) / [goose](https://github.com/block/goose)                                                         |    295 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/609489?s=40&v=4" width="20" height="20" alt=""> &nbsp; [aorwall](https://github.com/aorwall) / [moatless-tools](https://github.com/aorwall/moatless-tools)                                    |    291 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/2357342?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dmayboroda](https://github.com/dmayboroda) / [minima](https://github.com/dmayboroda/minima)                                          |    221 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/66303003?s=40&v=4" width="20" height="20" alt=""> &nbsp; [RobotecAI](https://github.com/RobotecAI) / [rai](https://github.com/RobotecAI/rai)                                                  |    172 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/148684274?s=40&v=4" width="20" height="20" alt=""> &nbsp; [i-am-alice](https://github.com/i-am-alice) / [3rd-devs](https://github.com/i-am-alice/3rd-devs)                                    |    148 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/171735272?s=40&v=4" width="20" height="20" alt=""> &nbsp; [8090-inc](https://github.com/8090-inc) / [xrx-sample-apps](https://github.com/8090-inc/xrx-sample-apps)                            |    138 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/104478511?s=40&v=4" width="20" height="20" alt=""> &nbsp; [babelcloud](https://github.com/babelcloud) / [LLM-RGB](https://github.com/babelcloud/LLM-RGB)                                      |    135 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/15125613?s=40&v=4" width="20" height="20" alt=""> &nbsp; [souzatharsis](https://github.com/souzatharsis) / [tamingLLMs](https://github.com/souzatharsis/tamingLLMs)                           |    129 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/51827949?s=40&v=4" width="20" height="20" alt=""> &nbsp; [deepset-ai](https://github.com/deepset-ai) / [haystack-core-integrations](https://github.com/deepset-ai/haystack-core-integrations) |    126 |
 
 ## 🔒 セキュリティとプライバシー
 

README.kr.md

@@ -138,40 +138,40 @@ Langfuse 팀이 관리하는 배포 방식으로, 후한 무료 플랜(취미
 
 ### 주요 통합:
 
-| 통합                                                                 | 지원                   | 설명                                                                                                                                      |
-| --------------------------------------------------------------------- | ---------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
-| [SDK](https://langfuse.com/docs/sdk)                                  | Python, JS/TS          | SDK를 사용하여 완전한 유연성을 갖춘 수동 계측(manual instrumentation)을 수행합니다.                                                       |
-| [OpenAI](https://langfuse.com/docs/integrations/openai)               | Python, JS/TS          | OpenAI SDK의 드롭인 대체(drop-in replacement)를 통해 자동 계측(automated instrumentation)을 수행합니다.                                       |
-| [Langchain](https://langfuse.com/docs/integrations/langchain)         | Python, JS/TS          | Langchain 애플리케이션에 callback 핸들러를 전달하여 자동 계측합니다.                                                                       |
-| [LlamaIndex](https://langfuse.com/docs/integrations/llama-index/get-started) | Python                 | LlamaIndex 콜백 시스템을 통한 자동 계측을 지원합니다.                                                                                      |
-| [Haystack](https://langfuse.com/docs/integrations/haystack)           | Python                 | Haystack 콘텐츠 추적 시스템을 통한 자동 계측을 지원합니다.                                                                                 |
-| [LiteLLM](https://langfuse.com/docs/integrations/litellm)             | Python, JS/TS (proxy only) | GPT의 드롭인 대체품으로 어떤 LLM도 사용할 수 있습니다. Azure, OpenAI, Cohere, Anthropic, Ollama, VLLM, Sagemaker, HuggingFace, Replicate 등 100개 이상의 LLM 지원. |
-| [Vercel AI SDK](https://langfuse.com/docs/integrations/vercel-ai-sdk)   | JS/TS                  | React, Next.js, Vue, Svelte, Node.js와 함께 AI 기반 애플리케이션 구축을 돕는 TypeScript 툴킷입니다.                                             |
-| [API](https://langfuse.com/docs/api)                                   |                        | 공개 API를 직접 호출합니다. OpenAPI 명세가 제공됩니다.                                                                                      |
+| 통합                                                                         | 지원                       | 설명                                                                                                                                                               |
+| ---------------------------------------------------------------------------- | -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| [SDK](https://langfuse.com/docs/sdk)                                         | Python, JS/TS              | SDK를 사용하여 완전한 유연성을 갖춘 수동 계측(manual instrumentation)을 수행합니다.                                                                                |
+| [OpenAI](https://langfuse.com/integrations/model-providers/openai-py)        | Python, JS/TS              | OpenAI SDK의 드롭인 대체(drop-in replacement)를 통해 자동 계측(automated instrumentation)을 수행합니다.                                                            |
+| [Langchain](https://langfuse.com/docs/integrations/langchain)                | Python, JS/TS              | Langchain 애플리케이션에 callback 핸들러를 전달하여 자동 계측합니다.                                                                                               |
+| [LlamaIndex](https://langfuse.com/docs/integrations/llama-index/get-started) | Python                     | LlamaIndex 콜백 시스템을 통한 자동 계측을 지원합니다.                                                                                                              |
+| [Haystack](https://langfuse.com/docs/integrations/haystack)                  | Python                     | Haystack 콘텐츠 추적 시스템을 통한 자동 계측을 지원합니다.                                                                                                         |
+| [LiteLLM](https://langfuse.com/docs/integrations/litellm)                    | Python, JS/TS (proxy only) | GPT의 드롭인 대체품으로 어떤 LLM도 사용할 수 있습니다. Azure, OpenAI, Cohere, Anthropic, Ollama, VLLM, Sagemaker, HuggingFace, Replicate 등 100개 이상의 LLM 지원. |
+| [Vercel AI SDK](https://langfuse.com/docs/integrations/vercel-ai-sdk)        | JS/TS                      | React, Next.js, Vue, Svelte, Node.js와 함께 AI 기반 애플리케이션 구축을 돕는 TypeScript 툴킷입니다.                                                                |
+| [API](https://langfuse.com/docs/api)                                         |                            | 공개 API를 직접 호출합니다. OpenAPI 명세가 제공됩니다.                                                                                                             |
 
 ### Langfuse와 통합된 패키지:
 
-| 이름                                                                    | 유형               | 설명                                                                                                             |
-| ----------------------------------------------------------------------- | ------------------ | ---------------------------------------------------------------------------------------------------------------- |
-| [Instructor](https://langfuse.com/docs/integrations/instructor)         | 라이브러리         | 구조화된 LLM 출력을(JSON, Pydantic) 얻기 위한 라이브러리입니다.                                                  |
-| [DSPy](https://langfuse.com/docs/integrations/dspy)                     | 라이브러리         | 언어 모델 프롬프트와 가중치를 체계적으로 최적화하는 프레임워크입니다.                                             |
-| [Mirascope](https://langfuse.com/docs/integrations/mirascope)           | 라이브러리         | LLM 애플리케이션 구축을 위한 Python 툴킷입니다.                                                                    |
-| [Ollama](https://langfuse.com/docs/integrations/ollama)                 | 모델 (로컬)        | 자신의 컴퓨터에서 오픈 소스 LLM을 손쉽게 실행할 수 있습니다.                                                      |
-| [Amazon Bedrock](https://langfuse.com/docs/integrations/amazon-bedrock) | 모델               | AWS에서 기본 및 파인튜닝된 모델을 실행합니다.                                                                      |
-| [Google VertexAI and Gemini](https://langfuse.com/docs/integrations/google-vertex-ai) | 모델               | Google에서 기본 및 파인튜닝된 모델을 실행합니다.                                                                      |
-| [AutoGen](https://langfuse.com/docs/integrations/autogen)               | 에이전트 프레임워크 | 분산 에이전트 구축을 위한 오픈 소스 LLM 플랫폼입니다.                                                              |
-| [Flowise](https://langfuse.com/docs/integrations/flowise)               | 채팅/에이전트 UI    | 맞춤형 LLM 플로우를 위한 JS/TS 코드 없는(no-code) 빌더입니다.                                                       |
-| [Langflow](https://langfuse.com/docs/integrations/langflow)             | 채팅/에이전트 UI    | react-flow를 활용하여 실험 및 프로토타이핑을 손쉽게 할 수 있도록 디자인된 LangChain용 Python 기반 UI입니다.          |
-| [Dify](https://langfuse.com/docs/integrations/dify)                     | 채팅/에이전트 UI    | 코드 없는 빌더와 함께 제공되는 오픈 소스 LLM 애플리케이션 개발 플랫폼입니다.                                        |
-| [OpenWebUI](https://langfuse.com/docs/integrations/openwebui)           | 채팅/에이전트 UI    | 셀프 호스팅 및 로컬 모델 등 다양한 LLM 실행기를 지원하는 셀프 호스팅 LLM 채팅 웹 UI입니다.                              |
-| [Promptfoo](https://langfuse.com/docs/integrations/promptfoo)           | 도구               | 오픈 소스 LLM 테스트 플랫폼입니다.                                                                                 |
-| [LobeChat](https://langfuse.com/docs/integrations/lobechat)             | 채팅/에이전트 UI    | 오픈 소스 챗봇 플랫폼입니다.                                                                                         |
-| [Vapi](https://langfuse.com/docs/integrations/vapi)                     | 플랫폼             | 오픈 소스 음성 AI 플랫폼입니다.                                                                                      |
-| [Inferable](https://langfuse.com/docs/integrations/other/inferable)     | 에이전트           | 분산 에이전트 구축을 위한 오픈 소스 LLM 플랫폼입니다.                                                              |
-| [Gradio](https://langfuse.com/docs/integrations/other/gradio)           | 채팅/에이전트 UI    | 채팅 UI와 같은 웹 인터페이스 구축을 위한 오픈 소스 Python 라이브러리입니다.                                         |
-| [Goose](https://langfuse.com/docs/integrations/goose)                   | 에이전트           | 분산 에이전트 구축을 위한 오픈 소스 LLM 플랫폼입니다.                                                              |
-| [smolagents](https://langfuse.com/docs/integrations/smolagents)         | 에이전트           | 오픈 소스 AI 에이전트 프레임워크입니다.                                                                            |
-| [CrewAI](https://langfuse.com/docs/integrations/crewai)                 | 에이전트           | 에이전트 간 협업 및 도구 사용을 위한 다중 에이전트 프레임워크입니다.                                                 |
+| 이름                                                                                  | 유형                | 설명                                                                                                        |
+| ------------------------------------------------------------------------------------- | ------------------- | ----------------------------------------------------------------------------------------------------------- |
+| [Instructor](https://langfuse.com/docs/integrations/instructor)                       | 라이브러리          | 구조화된 LLM 출력을(JSON, Pydantic) 얻기 위한 라이브러리입니다.                                             |
+| [DSPy](https://langfuse.com/docs/integrations/dspy)                                   | 라이브러리          | 언어 모델 프롬프트와 가중치를 체계적으로 최적화하는 프레임워크입니다.                                       |
+| [Mirascope](https://langfuse.com/docs/integrations/mirascope)                         | 라이브러리          | LLM 애플리케이션 구축을 위한 Python 툴킷입니다.                                                             |
+| [Ollama](https://langfuse.com/docs/integrations/ollama)                               | 모델 (로컬)         | 자신의 컴퓨터에서 오픈 소스 LLM을 손쉽게 실행할 수 있습니다.                                                |
+| [Amazon Bedrock](https://langfuse.com/docs/integrations/amazon-bedrock)               | 모델                | AWS에서 기본 및 파인튜닝된 모델을 실행합니다.                                                               |
+| [Google VertexAI and Gemini](https://langfuse.com/docs/integrations/google-vertex-ai) | 모델                | Google에서 기본 및 파인튜닝된 모델을 실행합니다.                                                            |
+| [AutoGen](https://langfuse.com/docs/integrations/autogen)                             | 에이전트 프레임워크 | 분산 에이전트 구축을 위한 오픈 소스 LLM 플랫폼입니다.                                                       |
+| [Flowise](https://langfuse.com/docs/integrations/flowise)                             | 채팅/에이전트 UI    | 맞춤형 LLM 플로우를 위한 JS/TS 코드 없는(no-code) 빌더입니다.                                               |
+| [Langflow](https://langfuse.com/docs/integrations/langflow)                           | 채팅/에이전트 UI    | react-flow를 활용하여 실험 및 프로토타이핑을 손쉽게 할 수 있도록 디자인된 LangChain용 Python 기반 UI입니다. |
+| [Dify](https://langfuse.com/docs/integrations/dify)                                   | 채팅/에이전트 UI    | 코드 없는 빌더와 함께 제공되는 오픈 소스 LLM 애플리케이션 개발 플랫폼입니다.                                |
+| [OpenWebUI](https://langfuse.com/docs/integrations/openwebui)                         | 채팅/에이전트 UI    | 셀프 호스팅 및 로컬 모델 등 다양한 LLM 실행기를 지원하는 셀프 호스팅 LLM 채팅 웹 UI입니다.                  |
+| [Promptfoo](https://langfuse.com/docs/integrations/promptfoo)                         | 도구                | 오픈 소스 LLM 테스트 플랫폼입니다.                                                                          |
+| [LobeChat](https://langfuse.com/docs/integrations/lobechat)                           | 채팅/에이전트 UI    | 오픈 소스 챗봇 플랫폼입니다.                                                                                |
+| [Vapi](https://langfuse.com/docs/integrations/vapi)                                   | 플랫폼              | 오픈 소스 음성 AI 플랫폼입니다.                                                                             |
+| [Inferable](https://langfuse.com/docs/integrations/other/inferable)                   | 에이전트            | 분산 에이전트 구축을 위한 오픈 소스 LLM 플랫폼입니다.                                                       |
+| [Gradio](https://langfuse.com/docs/integrations/other/gradio)                         | 채팅/에이전트 UI    | 채팅 UI와 같은 웹 인터페이스 구축을 위한 오픈 소스 Python 라이브러리입니다.                                 |
+| [Goose](https://langfuse.com/docs/integrations/goose)                                 | 에이전트            | 분산 에이전트 구축을 위한 오픈 소스 LLM 플랫폼입니다.                                                       |
+| [smolagents](https://langfuse.com/docs/integrations/smolagents)                       | 에이전트            | 오픈 소스 AI 에이전트 프레임워크입니다.                                                                     |
+| [CrewAI](https://langfuse.com/docs/integrations/crewai)                               | 에이전트            | 에이전트 간 협업 및 도구 사용을 위한 다중 에이전트 프레임워크입니다.                                        |
 
 ## 🚀 빠른 시작
 
@@ -185,7 +185,7 @@ Langfuse 팀이 관리하는 배포 방식으로, 후한 무료 플랜(취미
 
 ### 2️⃣ 첫 번째 LLM 호출 기록하기
 
-[`@observe()` 데코레이터](https://langfuse.com/docs/sdk/python/decorators)를 사용하면 Python LLM 애플리케이션의 추적이 매우 간편해집니다. 이 빠른 시작 예제에서는 Langfuse [OpenAI 통합](https://langfuse.com/docs/integrations/openai)을 사용하여 모든 모델 파라미터를 자동으로 캡처합니다.
+[`@observe()` 데코레이터](https://langfuse.com/docs/sdk/python/decorators)를 사용하면 Python LLM 애플리케이션의 추적이 매우 간편해집니다. 이 빠른 시작 예제에서는 Langfuse [OpenAI 통합](https://langfuse.com/integrations/model-providers/openai-py)을 사용하여 모든 모델 파라미터를 자동으로 캡처합니다.
 
 > [!TIP]
 > OpenAI를 사용하지 않으시다면, 다른 모델 및 프레임워크의 로그 기록 방법은 [문서](https://langfuse.com/docs/get-started#log-your-first-llm-call-to-langfuse)를 참조하세요.
@@ -197,8 +197,8 @@ pip install langfuse openai
 ```bash filename=".env"
 LANGFUSE_SECRET_KEY="sk-lf-..."
 LANGFUSE_PUBLIC_KEY="pk-lf-..."
-LANGFUSE_HOST="https://cloud.langfuse.com" # 🇪🇺 EU region
-# LANGFUSE_HOST="https://us.cloud.langfuse.com" # 🇺🇸 US region
+LANGFUSE_BASE_URL="https://cloud.langfuse.com" # 🇪🇺 EU region
+# LANGFUSE_BASE_URL="https://us.cloud.langfuse.com" # 🇺🇸 US region
 ```
 
 ```python:main.py
@@ -233,7 +233,7 @@ _[Langfuse의 공개 예제 trace](https://cloud.langfuse.com/project/cloramnkj0
 
 ## ⭐️ 별을 눌러주세요
 
-![Star Langfuse](https://langfuse.com/images/docs/github-readme/github-star-howto.gif)
+![star-langfuse-on-github](https://github.com/user-attachments/assets/79a1d816-d229-4526-aecc-097d4a19f1ad)
 
 ## 💭 지원
 
@@ -276,13 +276,14 @@ _[Langfuse의 공개 예제 trace](https://cloud.langfuse.com/project/cloramnkj0
 
 별(star) 수를 기준으로 순위가 매겨진 Langfuse를 사용하는 상위 오픈 소스 Python 프로젝트들 ([출처](https://github.com/langfuse/langfuse-docs/blob/main/components-mdx/dependents)):
 
-| 저장소                                                                                                                                                                                                                                                          | 별   |
-| :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---: |
+| 저장소                                                                                                                                                                                                                                                              |    별 |
+| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----: |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/127165244?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langgenius](https://github.com/langgenius) / [dify](https://github.com/langgenius/dify)                                            | 54865 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [open-webui](https://github.com/open-webui/open-webui)                                | 51531 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/131470832?s=40&v=4" width="20" height="20" alt=""> &nbsp; [lobehub](https://github.com/lobehub) / [lobe-chat](https://github.com/lobehub/lobe-chat)                                           | 49003 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85702467?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langflow-ai](https://github.com/langflow-ai) / [langflow](https://github.com/langflow-ai/langflow)                                  | 39093 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/130722866?s=40&v=4" width="20" height="20" alt=""> &nbsp; [run-llama](https://github.com/run-llama) / [llama_index](https://github.com/run-llama/llama_index)                                 | 37368 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [danny-avila](https://github.com/danny-avila) / [LibreChat](https://github.com/danny-avila/LibreChat)                               | 33142 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139558948?s=40&v=4" width="20" height="20" alt=""> &nbsp; [chatchat-space](https://github.com/chatchat-space) / [Langchain-Chatchat](https://github.com/chatchat-space/Langchain-Chatchat)    | 32486 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/128289781?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FlowiseAI](https://github.com/FlowiseAI) / [Flowise](https://github.com/FlowiseAI/Flowise)                                         | 32448 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31035808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mindsdb](https://github.com/mindsdb) / [mindsdb](https://github.com/mindsdb/mindsdb)                                                | 26931 |
@@ -320,7 +321,6 @@ _[Langfuse의 공개 예제 trace](https://cloud.langfuse.com/project/cloramnkj0
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/171735272?s=40&v=4" width="20" height="20" alt=""> &nbsp; [8090-inc](https://github.com/8090-inc) / [xrx-sample-apps](https://github.com/8090-inc/xrx-sample-apps)                            |   138 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/104478511?s=40&v=4" width="20" height="20" alt=""> &nbsp; [babelcloud](https://github.com/babelcloud) / [LLM-RGB](https://github.com/babelcloud/LLM-RGB)                                      |   135 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/15125613?s=40&v=4" width="20" height="20" alt=""> &nbsp; [souzatharsis](https://github.com/souzatharsis) / [tamingLLMs](https://github.com/souzatharsis/tamingLLMs)                           |   129 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [LibreChat-AI](https://github.com/LibreChat-AI) / [librechat.ai](https://github.com/LibreChat-AI/librechat.ai)                      |   128 |
 | <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/51827949?s=40&v=4" width="20" height="20" alt=""> &nbsp; [deepset-ai](https://github.com/deepset-ai) / [haystack-core-integrations](https://github.com/deepset-ai/haystack-core-integrations) |   126 |
 
 ## 🔒 보안 & 개인정보 보호
@@ -332,6 +332,7 @@ _[Langfuse의 공개 예제 trace](https://cloud.langfuse.com/project/cloramnkj0
 기본적으로 Langfuse는 자체 호스팅 인스턴스의 기본 사용 통계를 중앙 서버(PostHog)로 자동 보고합니다.
 
 이를 통해:
+
 1. Langfuse가 어떻게 사용되는지 이해하고, 가장 관련성 높은 기능을 개선할 수 있습니다.
 2. 내부 및 외부(예: 자금 조달) 보고를 위한 전체 사용량을 추적할 수 있습니다.
 

README.md

@@ -1,4 +1,4 @@
-![Langfuse GitHub Banner](https://langfuse.com/images/docs/github-readme/github-banner.png)
+<img width="4856" height="1000" alt="github-banner" src="https://github.com/user-attachments/assets/6f435ef3-1194-4e26-87af-aa13826bbb5f" />
 
 <div align="center">
    <div>
@@ -60,6 +60,8 @@
    <img alt="Issues closed" src="https://img.shields.io/github/issues-search?query=repo%3Alangfuse%2Flangfuse%20is%3Aclosed&label=issues%20closed&labelColor=%20%237d89b0&color=%20%235d6b98"></a>
    <a href="https://github.com/langfuse/langfuse/discussions/" target="_blank">
    <img alt="Discussion posts" src="https://img.shields.io/github/discussions/langfuse/langfuse?labelColor=%20%239b8afb&color=%20%237a5af8"></a>
+   <a href="https://deepwiki.com/langfuse/langfuse" target="_blank">
+   <img alt="Ask DeepWiki" src="https://deepwiki.com/badge.svg"></a>
 </p>
 
 <p align="center">
@@ -72,19 +74,19 @@
 Langfuse is an **open source LLM engineering** platform. It helps teams collaboratively
 **develop, monitor, evaluate,** and **debug** AI applications. Langfuse can be **self-hosted in minutes** and is **battle-tested**.
 
-[![Langfuse Overview Video](https://github.com/user-attachments/assets/3926b288-ff61-4b95-8aa1-45d041c70866)](https://langfuse.com/watch-demo)
+[![Langfuse Overview Video](https://github.com/user-attachments/assets/925d71db-6331-445e-8f3e-727ee95d1c9f)](https://langfuse.com/watch-demo)
 
 ## ✨ Core Features
 
-![Langfuse Overview](https://langfuse.com/images/docs/github-readme/github-feature-overview.png)
+<img width="4856" height="1944" alt="Langfuse Overview" src="https://github.com/user-attachments/assets/5dac68ef-d546-49fb-b06f-cfafc19282e3" />
 
 - [LLM Application Observability](https://langfuse.com/docs/tracing): Instrument your app and start ingesting traces to Langfuse, thereby tracking LLM calls and other relevant logic in your app such as retrieval, embedding, or agent actions. Inspect and debug complex logs and user sessions. Try the interactive [demo](https://langfuse.com/docs/demo) to see this in action.
 
-- [Prompt Management](https://langfuse.com/docs/prompts/get-started) helps you centrally manage, version control, and collaboratively iterate on your prompts. Thanks to strong caching on server and client side, you can iterate on prompts without adding latency to your application.
+- [Prompt Management](https://langfuse.com/docs/prompt-management/get-started) helps you centrally manage, version control, and collaboratively iterate on your prompts. Thanks to strong caching on server and client side, you can iterate on prompts without adding latency to your application.
 
-- [Evaluations](https://langfuse.com/docs/scores/overview) are key to the LLM application development workflow, and Langfuse adapts to your needs. It supports LLM-as-a-judge, user feedback collection, manual labeling, and custom evaluation pipelines via APIs/SDKs.
+- [Evaluations](https://langfuse.com/docs/evaluation/overview) are key to the LLM application development workflow, and Langfuse adapts to your needs. It supports LLM-as-a-judge, user feedback collection, manual labeling, and custom evaluation pipelines via APIs/SDKs.
 
-- [Datasets](https://langfuse.com/docs/datasets/overview) enable test sets and benchmarks for evaluating your LLM application. They support continuous improvement, pre-deployment testing, structured experiments, flexible evaluation, and seamless integration with frameworks like LangChain and LlamaIndex.
+- [Datasets](https://langfuse.com/docs/evaluation/dataset-runs/datasets) enable test sets and benchmarks for evaluating your LLM application. They support continuous improvement, pre-deployment testing, structured experiments, flexible evaluation, and seamless integration with frameworks like LangChain and LlamaIndex.
 
 - [LLM Playground](https://langfuse.com/docs/playground) is a tool for testing and iterating on your prompts and model configurations, shortening the feedback loop and accelerating development. When you see a bad result in tracing, you can directly jump to the playground to iterate on it.
 
@@ -92,7 +94,7 @@ Langfuse is an **open source LLM engineering** platform. It helps teams collabor
 
 ## 📦 Deploy Langfuse
 
-![Langfuse Deployment Options](https://langfuse.com/images/docs/github-readme/github-deployment-options.png)
+<img width="4856" height="1322" alt="Langfuse Deployment Options" src="https://github.com/user-attachments/assets/98f020c7-7a20-4264-a201-65c41a52a5d5" />
 
 ### Langfuse Cloud
 
@@ -118,6 +120,7 @@ Run Langfuse on your own infrastructure:
   # Run the langfuse docker compose
   docker compose up
   ```
+
 - [VM](https://langfuse.com/self-hosting/docker-compose): Run Langfuse on a single Virtual Machine using Docker Compose.
 - [Kubernetes (Helm)](https://langfuse.com/self-hosting/kubernetes-helm): Run Langfuse on a Kubernetes cluster using Helm. This is the preferred production deployment.
 - Terraform Templates: [AWS](https://langfuse.com/self-hosting/aws), [Azure](https://langfuse.com/self-hosting/azure), [GCP](https://langfuse.com/self-hosting/gcp)
@@ -126,19 +129,20 @@ See [self-hosting documentation](https://langfuse.com/self-hosting) to learn mor
 
 ## 🔌 Integrations
 
-![Langfuse Integrations](https://langfuse.com/images/docs/github-readme/github-integrations.png)
+<img width="4856" height="1322" alt="github-integrations" src="https://github.com/user-attachments/assets/e41ea0fb-742d-41ce-bf94-1d4fb95750cd" />
 
 ### Main Integrations:
 
 | Integration                                                                  | Supports                   | Description                                                                                                                                      |
 | ---------------------------------------------------------------------------- | -------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ |
 | [SDK](https://langfuse.com/docs/sdk)                                         | Python, JS/TS              | Manual instrumentation using the SDKs for full flexibility.                                                                                      |
-| [OpenAI](https://langfuse.com/docs/integrations/openai)                      | Python, JS/TS              | Automated instrumentation using drop-in replacement of OpenAI SDK.                                                                               |
+| [OpenAI](https://langfuse.com/integrations/model-providers/openai-py)        | Python, JS/TS              | Automated instrumentation using drop-in replacement of OpenAI SDK.                                                                               |
 | [Langchain](https://langfuse.com/docs/integrations/langchain)                | Python, JS/TS              | Automated instrumentation by passing callback handler to Langchain application.                                                                  |
 | [LlamaIndex](https://langfuse.com/docs/integrations/llama-index/get-started) | Python                     | Automated instrumentation via LlamaIndex callback system.                                                                                        |
 | [Haystack](https://langfuse.com/docs/integrations/haystack)                  | Python                     | Automated instrumentation via Haystack content tracing system.                                                                                   |
 | [LiteLLM](https://langfuse.com/docs/integrations/litellm)                    | Python, JS/TS (proxy only) | Use any LLM as a drop in replacement for GPT. Use Azure, OpenAI, Cohere, Anthropic, Ollama, VLLM, Sagemaker, HuggingFace, Replicate (100+ LLMs). |
 | [Vercel AI SDK](https://langfuse.com/docs/integrations/vercel-ai-sdk)        | JS/TS                      | TypeScript toolkit designed to help developers build AI-powered applications with React, Next.js, Vue, Svelte, Node.js.                          |
+| [Mastra](https://langfuse.com/docs/integrations/mastra)                      | JS/TS                      | Open source framework for building AI agents and multi-agent systems.                                                                            |
 | [API](https://langfuse.com/docs/api)                                         |                            | Directly call the public API. OpenAPI spec available.                                                                                            |
 
 ### Packages integrated with Langfuse:
@@ -176,7 +180,7 @@ Instrument your app and start ingesting traces to Langfuse, thereby tracking LLM
 
 ### 2️⃣ Log your first LLM call
 
-The [`@observe()` decorator](https://langfuse.com/docs/sdk/python/decorators) makes it easy to trace any Python LLM application. In this quickstart we also use the Langfuse [OpenAI integration](https://langfuse.com/docs/integrations/openai) to automatically capture all model parameters.
+The [`@observe()` decorator](https://langfuse.com/docs/sdk/python/decorators) makes it easy to trace any Python LLM application. In this quickstart we also use the Langfuse [OpenAI integration](https://langfuse.com/integrations/model-providers/openai-py) to automatically capture all model parameters.
 
 > [!TIP]
 > Not using OpenAI? Visit [our documentation](https://langfuse.com/docs/get-started#log-your-first-llm-call-to-langfuse) to learn how to log other models and frameworks.
@@ -188,8 +192,8 @@ pip install langfuse openai
 ```bash filename=".env"
 LANGFUSE_SECRET_KEY="sk-lf-..."
 LANGFUSE_PUBLIC_KEY="pk-lf-..."
-LANGFUSE_HOST="https://cloud.langfuse.com" # 🇪🇺 EU region
-# LANGFUSE_HOST="https://us.cloud.langfuse.com" # 🇺🇸 US region
+LANGFUSE_BASE_URL="https://cloud.langfuse.com" # 🇪🇺 EU region
+# LANGFUSE_BASE_URL="https://us.cloud.langfuse.com" # 🇺🇸 US region
 ```
 
 ```python /@observe()/ /from langfuse.openai import openai/ filename="main.py"
@@ -214,7 +218,7 @@ main()
 
 See your language model calls and other application logic in Langfuse.
 
-![Example trace in Langfuse](https://langfuse.com/images/docs/github-readme/github-example-trace.png)
+<img width="1787" height="674" alt="Example trace in Langfuse" src="https://github.com/user-attachments/assets/f796eb78-dfb5-4570-b236-bdb4b67d4d55" />
 
 _[Public example trace in Langfuse](https://cloud.langfuse.com/project/cloramnkj0002jz088vzn1ja4/traces/2cec01e3-3dc2-472f-afcf-3b968cf0c1f4?timestamp=2025-02-10T14%3A27%3A30.275Z&observation=cb5ff844-07ef-41e6-b8e2-6c64344bc13b)_
 
@@ -253,6 +257,10 @@ Your contributions are welcome!
 
 This repository is MIT licensed, except for the `ee` folders. See [LICENSE](LICENSE) and [docs](https://langfuse.com/docs/open-source) for more details.
 
+## Dependencies
+
+We deploy this code base in Docker containers based on the Linux Alpine Image ([source](https://github.com/nodejs/docker-node)). You may find the Dockerfiles in [web/Dockerfile](web/Dockerfile) and [worker/Dockerfile](worker/Dockerfile).
+
 ## ⭐️ Star History
 
 <a href="https://star-history.com/#langfuse/langfuse&Date">
@@ -267,52 +275,105 @@ This repository is MIT licensed, except for the `ee` folders. See [LICENSE](LICE
 
 Top open-source Python projects that use Langfuse, ranked by stars ([Source](https://github.com/langfuse/langfuse-docs/blob/main/components-mdx/dependents)):
 
-| Repository                                                                                                                                                                                                                                                          | Stars |
-| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ----: |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/127165244?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langgenius](https://github.com/langgenius) / [dify](https://github.com/langgenius/dify)                                            | 54865 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [open-webui](https://github.com/open-webui/open-webui)                                | 51531 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/131470832?s=40&v=4" width="20" height="20" alt=""> &nbsp; [lobehub](https://github.com/lobehub) / [lobe-chat](https://github.com/lobehub/lobe-chat)                                           | 49003 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85702467?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langflow-ai](https://github.com/langflow-ai) / [langflow](https://github.com/langflow-ai/langflow)                                  | 39093 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/130722866?s=40&v=4" width="20" height="20" alt=""> &nbsp; [run-llama](https://github.com/run-llama) / [llama_index](https://github.com/run-llama/llama_index)                                 | 37368 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139558948?s=40&v=4" width="20" height="20" alt=""> &nbsp; [chatchat-space](https://github.com/chatchat-space) / [Langchain-Chatchat](https://github.com/chatchat-space/Langchain-Chatchat)    | 32486 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/128289781?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FlowiseAI](https://github.com/FlowiseAI) / [Flowise](https://github.com/FlowiseAI/Flowise)                                         | 32448 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31035808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mindsdb](https://github.com/mindsdb) / [mindsdb](https://github.com/mindsdb/mindsdb)                                                | 26931 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/119600397?s=40&v=4" width="20" height="20" alt=""> &nbsp; [twentyhq](https://github.com/twentyhq) / [twenty](https://github.com/twentyhq/twenty)                                              | 24195 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog](https://github.com/PostHog/posthog)                                                | 22618 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/121462774?s=40&v=4" width="20" height="20" alt=""> &nbsp; [BerriAI](https://github.com/BerriAI) / [litellm](https://github.com/BerriAI/litellm)                                               | 15151 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/179202840?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mediar-ai](https://github.com/mediar-ai) / [screenpipe](https://github.com/mediar-ai/screenpipe)                                   | 11037 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/105877416?s=40&v=4" width="20" height="20" alt=""> &nbsp; [formbricks](https://github.com/formbricks) / [formbricks](https://github.com/formbricks/formbricks)                                |  9386 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/76263028?s=40&v=4" width="20" height="20" alt=""> &nbsp; [anthropics](https://github.com/anthropics) / [courses](https://github.com/anthropics/courses)                                       |  8385 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/78410652?s=40&v=4" width="20" height="20" alt=""> &nbsp; [GreyDGL](https://github.com/GreyDGL) / [PentestGPT](https://github.com/GreyDGL/PentestGPT)                                          |  7374 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/152537519?s=40&v=4" width="20" height="20" alt=""> &nbsp; [superagent-ai](https://github.com/superagent-ai) / [superagent](https://github.com/superagent-ai/superagent)                       |  5391 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/137907881?s=40&v=4" width="20" height="20" alt=""> &nbsp; [promptfoo](https://github.com/promptfoo) / [promptfoo](https://github.com/promptfoo/promptfoo)                                     |  4976 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/157326433?s=40&v=4" width="20" height="20" alt=""> &nbsp; [onlook-dev](https://github.com/onlook-dev) / [onlook](https://github.com/onlook-dev/onlook)                                        |  4141 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/7250217?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Canner](https://github.com/Canner) / [WrenAI](https://github.com/Canner/WrenAI)                                                      |  2526 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/11855343?s=40&v=4" width="20" height="20" alt=""> &nbsp; [pingcap](https://github.com/pingcap) / [autoflow](https://github.com/pingcap/autoflow)                                              |  2061 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85268109?s=40&v=4" width="20" height="20" alt=""> &nbsp; [MLSysOps](https://github.com/MLSysOps) / [MLE-agent](https://github.com/MLSysOps/MLE-agent)                                         |  1161 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [pipelines](https://github.com/open-webui/pipelines)                                  |  1100 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/18422723?s=40&v=4" width="20" height="20" alt=""> &nbsp; [alishobeiri](https://github.com/alishobeiri) / [thread](https://github.com/alishobeiri/thread)                                      |  1074 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/125468716?s=40&v=4" width="20" height="20" alt=""> &nbsp; [topoteretes](https://github.com/topoteretes) / [cognee](https://github.com/topoteretes/cognee)                                     |   971 |
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-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169500408?s=40&v=4" width="20" height="20" alt=""> &nbsp; [opslane](https://github.com/opslane) / [opslane](https://github.com/opslane/opslane)                                               |   677 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/151867818?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dynamiq-ai](https://github.com/dynamiq-ai) / [dynamiq](https://github.com/dynamiq-ai/dynamiq)                                      |   639 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/48585267?s=40&v=4" width="20" height="20" alt=""> &nbsp; [theopenconversationkit](https://github.com/theopenconversationkit) / [tock](https://github.com/theopenconversationkit/tock)         |   514 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/20493493?s=40&v=4" width="20" height="20" alt=""> &nbsp; [andysingal](https://github.com/andysingal) / [llm-course](https://github.com/andysingal/llm-course)                                 |   394 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/132396805?s=40&v=4" width="20" height="20" alt=""> &nbsp; [phospho-app](https://github.com/phospho-app) / [phospho](https://github.com/phospho-app/phospho)                                   |   384 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/178644984?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sentient-engineering](https://github.com/sentient-engineering) / [agent-q](https://github.com/sentient-engineering/agent-q)        |   370 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/168552753?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sql-agi](https://github.com/sql-agi) / [DB-GPT](https://github.com/sql-agi/DB-GPT)                                                 |   324 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/60330232?s=40&v=4" width="20" height="20" alt=""> &nbsp; [PostHog](https://github.com/PostHog) / [posthog-foss](https://github.com/PostHog/posthog-foss)                                      |   305 |
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-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/185116535?s=40&v=4" width="20" height="20" alt=""> &nbsp; [block](https://github.com/block) / [goose](https://github.com/block/goose)                                                         |   295 |
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-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/66303003?s=40&v=4" width="20" height="20" alt=""> &nbsp; [RobotecAI](https://github.com/RobotecAI) / [rai](https://github.com/RobotecAI/rai)                                                  |   172 |
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-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/15125613?s=40&v=4" width="20" height="20" alt=""> &nbsp; [souzatharsis](https://github.com/souzatharsis) / [tamingLLMs](https://github.com/souzatharsis/tamingLLMs)                           |   129 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [LibreChat-AI](https://github.com/LibreChat-AI) / [librechat.ai](https://github.com/LibreChat-AI/librechat.ai)                      |   128 |
-| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/51827949?s=40&v=4" width="20" height="20" alt=""> &nbsp; [deepset-ai](https://github.com/deepset-ai) / [haystack-core-integrations](https://github.com/deepset-ai/haystack-core-integrations) |   126 |
+| Repository                                                                                                                                                                                                                                                                                                     |  Stars |
+| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -----: |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85702467?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langflow-ai](https://github.com/langflow-ai) / [langflow](https://github.com/langflow-ai/langflow)                                                                             | 116251 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [open-webui](https://github.com/open-webui/open-webui)                                                                           | 109642 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/23818?s=40&v=4" width="20" height="20" alt=""> &nbsp; [abi](https://github.com/abi) / [screenshot-to-code](https://github.com/abi/screenshot-to-code)                                                                                    |  70877 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/131470832?s=40&v=4" width="20" height="20" alt=""> &nbsp; [lobehub](https://github.com/lobehub) / [lobe-chat](https://github.com/lobehub/lobe-chat)                                                                                      |  65454 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/69962740?s=40&v=4" width="20" height="20" alt=""> &nbsp; [infiniflow](https://github.com/infiniflow) / [ragflow](https://github.com/infiniflow/ragflow)                                                                                  |  64118 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/135057108?s=40&v=4" width="20" height="20" alt=""> &nbsp; [firecrawl](https://github.com/firecrawl) / [firecrawl](https://github.com/firecrawl/firecrawl)                                                                                |  56713 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/130722866?s=40&v=4" width="20" height="20" alt=""> &nbsp; [run-llama](https://github.com/run-llama) / [llama_index](https://github.com/run-llama/llama_index)                                                                            |  44203 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/128289781?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FlowiseAI](https://github.com/FlowiseAI) / [Flowise](https://github.com/FlowiseAI/Flowise)                                                                                    |  43547 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/159330290?s=40&v=4" width="20" height="20" alt=""> &nbsp; [QuivrHQ](https://github.com/QuivrHQ) / [quivr](https://github.com/QuivrHQ/quivr)                                                                                              |  38415 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/6154722?s=40&v=4" width="20" height="20" alt=""> &nbsp; [microsoft](https://github.com/microsoft) / [ai-agents-for-beginners](https://github.com/microsoft/ai-agents-for-beginners)                                                      |  38012 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139558948?s=40&v=4" width="20" height="20" alt=""> &nbsp; [chatchat-space](https://github.com/chatchat-space) / [Langchain-Chatchat](https://github.com/chatchat-space/Langchain-Chatchat)                                               |  36071 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31035808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mindsdb](https://github.com/mindsdb) / [mindsdb](https://github.com/mindsdb/mindsdb)                                                                                           |  35669 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169401942?s=40&v=4" width="20" height="20" alt=""> &nbsp; [danny-avila](https://github.com/danny-avila) / [LibreChat](https://github.com/danny-avila/LibreChat)                                                                            |  33142 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/121462774?s=40&v=4" width="20" height="20" alt=""> &nbsp; [BerriAI](https://github.com/BerriAI) / [litellm](https://github.com/BerriAI/litellm)                                                                                          |  28726 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/157326433?s=40&v=4" width="20" height="20" alt=""> &nbsp; [onlook-dev](https://github.com/onlook-dev) / [onlook](https://github.com/onlook-dev/onlook)                                                                                   |  22447 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/487568?s=40&v=4" width="20" height="20" alt=""> &nbsp; [NixOS](https://github.com/NixOS) / [nixpkgs](https://github.com/NixOS/nixpkgs)                                                                                                   |  21748 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/170767358?s=40&v=4" width="20" height="20" alt=""> &nbsp; [kortix-ai](https://github.com/kortix-ai) / [suna](https://github.com/kortix-ai/suna)                                                                                          |  17976 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/76263028?s=40&v=4" width="20" height="20" alt=""> &nbsp; [anthropics](https://github.com/anthropics) / [courses](https://github.com/anthropics/courses)                                                                                  |  17057 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/149120496?s=40&v=4" width="20" height="20" alt=""> &nbsp; [mastra-ai](https://github.com/mastra-ai) / [mastra](https://github.com/mastra-ai/mastra)                                                                                      |  16484 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/134601687?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langfuse](https://github.com/langfuse) / [langfuse](https://github.com/langfuse/langfuse)                                                                                     |  16054 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/7250217?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Canner](https://github.com/Canner) / [WrenAI](https://github.com/Canner/WrenAI)                                                                                                 |  11868 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/137907881?s=40&v=4" width="20" height="20" alt=""> &nbsp; [promptfoo](https://github.com/promptfoo) / [promptfoo](https://github.com/promptfoo/promptfoo)                                                                                |   8350 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/193350244?s=40&v=4" width="20" height="20" alt=""> &nbsp; [The-Pocket](https://github.com/The-Pocket) / [PocketFlow](https://github.com/The-Pocket/PocketFlow)                                                                           |   8313 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139012218?s=40&v=4" width="20" height="20" alt=""> &nbsp; [OpenPipe](https://github.com/OpenPipe) / [ART](https://github.com/OpenPipe/ART)                                                                                               |   7093 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/125468716?s=40&v=4" width="20" height="20" alt=""> &nbsp; [topoteretes](https://github.com/topoteretes) / [cognee](https://github.com/topoteretes/cognee)                                                                                |   7011 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/3299148?s=40&v=4" width="20" height="20" alt=""> &nbsp; [awslabs](https://github.com/awslabs) / [agent-squad](https://github.com/awslabs/agent-squad)                                                                                    |   6785 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/162546372?s=40&v=4" width="20" height="20" alt=""> &nbsp; [BasedHardware](https://github.com/BasedHardware) / [omi](https://github.com/BasedHardware/omi)                                                                                |   6231 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/118301880?s=40&v=4" width="20" height="20" alt=""> &nbsp; [hatchet-dev](https://github.com/hatchet-dev) / [hatchet](https://github.com/hatchet-dev/hatchet)                                                                              |   6019 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/88676955?s=40&v=4" width="20" height="20" alt=""> &nbsp; [zenml-io](https://github.com/zenml-io) / [zenml](https://github.com/zenml-io/zenml)                                                                                            |   4873 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/132635806?s=40&v=4" width="20" height="20" alt=""> &nbsp; [refly-ai](https://github.com/refly-ai) / [refly](https://github.com/refly-ai/refly)                                                                                           |   4654 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/47287758?s=40&v=4" width="20" height="20" alt=""> &nbsp; [coleam00](https://github.com/coleam00) / [ottomator-agents](https://github.com/coleam00/ottomator-agents)                                                                      |   4165 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/8251002?s=40&v=4" width="20" height="20" alt=""> &nbsp; [JoshuaC215](https://github.com/JoshuaC215) / [agent-service-toolkit](https://github.com/JoshuaC215/agent-service-toolkit)                                                       |   3557 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/185852128?s=40&v=4" width="20" height="20" alt=""> &nbsp; [colanode](https://github.com/colanode) / [colanode](https://github.com/colanode/colanode)                                                                                     |   3517 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/201282378?s=40&v=4" width="20" height="20" alt=""> &nbsp; [VoltAgent](https://github.com/VoltAgent) / [voltagent](https://github.com/VoltAgent/voltagent)                                                                                |   3210 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/188657705?s=40&v=4" width="20" height="20" alt=""> &nbsp; [bragai](https://github.com/bragai) / [bRAG-langchain](https://github.com/bragai/bRAG-langchain)                                                                               |   3010 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/11855343?s=40&v=4" width="20" height="20" alt=""> &nbsp; [pingcap](https://github.com/pingcap) / [autoflow](https://github.com/pingcap/autoflow)                                                                                         |   2651 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/135396723?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sourcebot-dev](https://github.com/sourcebot-dev) / [sourcebot](https://github.com/sourcebot-dev/sourcebot)                                                                    |   2570 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/158137808?s=40&v=4" width="20" height="20" alt=""> &nbsp; [open-webui](https://github.com/open-webui) / [pipelines](https://github.com/open-webui/pipelines)                                                                             |   2055 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/179994263?s=40&v=4" width="20" height="20" alt=""> &nbsp; [YFGaia](https://github.com/YFGaia) / [dify-plus](https://github.com/YFGaia/dify-plus)                                                                                         |   1734 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/46323662?s=40&v=4" width="20" height="20" alt=""> &nbsp; [TheSpaghettiDetective](https://github.com/TheSpaghettiDetective) / [obico-server](https://github.com/TheSpaghettiDetective/obico-server)                                       |   1687 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/85268109?s=40&v=4" width="20" height="20" alt=""> &nbsp; [MLSysOps](https://github.com/MLSysOps) / [MLE-agent](https://github.com/MLSysOps/MLE-agent)                                                                                    |   1387 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/144196744?s=40&v=4" width="20" height="20" alt=""> &nbsp; [TIGER-AI-Lab](https://github.com/TIGER-AI-Lab) / [TheoremExplainAgent](https://github.com/TIGER-AI-Lab/TheoremExplainAgent)                                                   |   1385 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/2314423?s=40&v=4" width="20" height="20" alt=""> &nbsp; [trailofbits](https://github.com/trailofbits) / [buttercup](https://github.com/trailofbits/buttercup)                                                                            |   1223 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/62564480?s=40&v=4" width="20" height="20" alt=""> &nbsp; [wassim249](https://github.com/wassim249) / [fastapi-langgraph-agent-production-ready-template](https://github.com/wassim249/fastapi-langgraph-agent-production-ready-template) |   1200 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/18422723?s=40&v=4" width="20" height="20" alt=""> &nbsp; [alishobeiri](https://github.com/alishobeiri) / [thread](https://github.com/alishobeiri/thread)                                                                                 |   1098 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/2357342?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dmayboroda](https://github.com/dmayboroda) / [minima](https://github.com/dmayboroda/minima)                                                                                     |   1010 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/65890619?s=40&v=4" width="20" height="20" alt=""> &nbsp; [zstar1003](https://github.com/zstar1003) / [ragflow-plus](https://github.com/zstar1003/ragflow-plus)                                                                           |    993 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/121352441?s=40&v=4" width="20" height="20" alt=""> &nbsp; [openops-cloud](https://github.com/openops-cloud) / [openops](https://github.com/openops-cloud/openops)                                                                        |    939 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/151867818?s=40&v=4" width="20" height="20" alt=""> &nbsp; [dynamiq-ai](https://github.com/dynamiq-ai) / [dynamiq](https://github.com/dynamiq-ai/dynamiq)                                                                                 |    927 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/74420131?s=40&v=4" width="20" height="20" alt=""> &nbsp; [xataio](https://github.com/xataio) / [agent](https://github.com/xataio/agent)                                                                                                  |    857 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/123981229?s=40&v=4" width="20" height="20" alt=""> &nbsp; [plastic-labs](https://github.com/plastic-labs) / [tutor-gpt](https://github.com/plastic-labs/tutor-gpt)                                                                       |    845 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/176438967?s=40&v=4" width="20" height="20" alt=""> &nbsp; [trendy-design](https://github.com/trendy-design) / [llmchat](https://github.com/trendy-design/llmchat)                                                                        |    829 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/2045570?s=40&v=4" width="20" height="20" alt=""> &nbsp; [hotovo](https://github.com/hotovo) / [aider-desk](https://github.com/hotovo/aider-desk)                                                                                         |    781 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/169500408?s=40&v=4" width="20" height="20" alt=""> &nbsp; [opslane](https://github.com/opslane) / [opslane](https://github.com/opslane/opslane)                                                                                          |    719 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/142796018?s=40&v=4" width="20" height="20" alt=""> &nbsp; [wrtnlabs](https://github.com/wrtnlabs) / [autoview](https://github.com/wrtnlabs/autoview)                                                                                     |    688 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/20493493?s=40&v=4" width="20" height="20" alt=""> &nbsp; [andysingal](https://github.com/andysingal) / [llm-course](https://github.com/andysingal/llm-course)                                                                            |    643 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/48585267?s=40&v=4" width="20" height="20" alt=""> &nbsp; [theopenconversationkit](https://github.com/theopenconversationkit) / [tock](https://github.com/theopenconversationkit/tock)                                                    |    587 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/178644984?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sentient-engineering](https://github.com/sentient-engineering) / [agent-q](https://github.com/sentient-engineering/agent-q)                                                   |    487 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/58037050?s=40&v=4" width="20" height="20" alt=""> &nbsp; [NicholasGoh](https://github.com/NicholasGoh) / [fastapi-mcp-langgraph-template](https://github.com/NicholasGoh/fastapi-mcp-langgraph-template)                                 |    481 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/148684274?s=40&v=4" width="20" height="20" alt=""> &nbsp; [i-am-alice](https://github.com/i-am-alice) / [3rd-devs](https://github.com/i-am-alice/3rd-devs)                                                                               |    472 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/163431636?s=40&v=4" width="20" height="20" alt=""> &nbsp; [AIDotNet](https://github.com/AIDotNet) / [koala-ai](https://github.com/AIDotNet/koala-ai)                                                                                     |    470 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/132396805?s=40&v=4" width="20" height="20" alt=""> &nbsp; [phospho-app](https://github.com/phospho-app) / [text-analytics-legacy](https://github.com/phospho-app/text-analytics-legacy)                                                  |    439 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/170831637?s=40&v=4" width="20" height="20" alt=""> &nbsp; [inferablehq](https://github.com/inferablehq) / [inferable](https://github.com/inferablehq/inferable)                                                                          |    403 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/171800766?s=40&v=4" width="20" height="20" alt=""> &nbsp; [duoyang666](https://github.com/duoyang666) / [ai_novel](https://github.com/duoyang666/ai_novel)                                                                               |    397 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/209155962?s=40&v=4" width="20" height="20" alt=""> &nbsp; [strands-agents](https://github.com/strands-agents) / [samples](https://github.com/strands-agents/samples)                                                                     |    385 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/16997807?s=40&v=4" width="20" height="20" alt=""> &nbsp; [FranciscoMoretti](https://github.com/FranciscoMoretti) / [sparka](https://github.com/FranciscoMoretti/sparka)                                                                  |    380 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/66303003?s=40&v=4" width="20" height="20" alt=""> &nbsp; [RobotecAI](https://github.com/RobotecAI) / [rai](https://github.com/RobotecAI/rai)                                                                                             |    373 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/137044109?s=40&v=4" width="20" height="20" alt=""> &nbsp; [ElectricCodeGuy](https://github.com/ElectricCodeGuy) / [SupabaseAuthWithSSR](https://github.com/ElectricCodeGuy/SupabaseAuthWithSSR)                                          |    370 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/15125613?s=40&v=4" width="20" height="20" alt=""> &nbsp; [souzatharsis](https://github.com/souzatharsis) / [tamingLLMs](https://github.com/souzatharsis/tamingLLMs)                                                                      |    323 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/8931462?s=40&v=4" width="20" height="20" alt=""> &nbsp; [aws-samples](https://github.com/aws-samples) / [aws-ai-ml-workshop-kr](https://github.com/aws-samples/aws-ai-ml-workshop-kr)                                                    |    295 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/25676773?s=40&v=4" width="20" height="20" alt=""> &nbsp; [weizxfree](https://github.com/weizxfree) / [KnowFlow](https://github.com/weizxfree/KnowFlow)                                                                                   |    285 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/88676955?s=40&v=4" width="20" height="20" alt=""> &nbsp; [zenml-io](https://github.com/zenml-io) / [zenml-projects](https://github.com/zenml-io/zenml-projects)                                                                          |    276 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/136071305?s=40&v=4" width="20" height="20" alt=""> &nbsp; [wxai-space](https://github.com/wxai-space) / [LightAgent](https://github.com/wxai-space/LightAgent)                                                                           |    275 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/90278288?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Ozamatash](https://github.com/Ozamatash) / [deep-research-mcp](https://github.com/Ozamatash/deep-research-mcp)                                                                 |    269 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/168552753?s=40&v=4" width="20" height="20" alt=""> &nbsp; [sql-agi](https://github.com/sql-agi) / [DB-GPT](https://github.com/sql-agi/DB-GPT)                                                                                            |    241 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/828269?s=40&v=4" width="20" height="20" alt=""> &nbsp; [guyernest](https://github.com/guyernest) / [advanced-rag](https://github.com/guyernest/advanced-rag)                                                                             |    238 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/175069511?s=40&v=4" width="20" height="20" alt=""> &nbsp; [bklieger-groq](https://github.com/bklieger-groq) / [mathtutor-on-groq](https://github.com/bklieger-groq/mathtutor-on-groq)                                                    |    233 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/123981229?s=40&v=4" width="20" height="20" alt=""> &nbsp; [plastic-labs](https://github.com/plastic-labs) / [honcho](https://github.com/plastic-labs/honcho)                                                                             |    224 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/118967077?s=40&v=4" width="20" height="20" alt=""> &nbsp; [OVINC-CN](https://github.com/OVINC-CN) / [OpenWebUI](https://github.com/OVINC-CN/OpenWebUI)                                                                                   |    202 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/31960995?s=40&v=4" width="20" height="20" alt=""> &nbsp; [zhutoutoutousan](https://github.com/zhutoutoutousan) / [worldquant-miner](https://github.com/zhutoutoutousan/worldquant-miner)                                                 |    202 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/29215115?s=40&v=4" width="20" height="20" alt=""> &nbsp; [iceener](https://github.com/iceener) / [ai](https://github.com/iceener/ai)                                                                                                     |    186 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/187584218?s=40&v=4" width="20" height="20" alt=""> &nbsp; [giselles-ai](https://github.com/giselles-ai) / [giselle](https://github.com/giselles-ai/giselle)                                                                              |    181 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/174666116?s=40&v=4" width="20" height="20" alt=""> &nbsp; [ai-shifu](https://github.com/ai-shifu) / [ai-shifu](https://github.com/ai-shifu/ai-shifu)                                                                                     |    181 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/8931462?s=40&v=4" width="20" height="20" alt=""> &nbsp; [aws-samples](https://github.com/aws-samples) / [sample-serverless-mcp-servers](https://github.com/aws-samples/sample-serverless-mcp-servers)                                    |    175 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/202488052?s=40&v=4" width="20" height="20" alt=""> &nbsp; [celerforge](https://github.com/celerforge) / [freenote](https://github.com/celerforge/freenote)                                                                               |    171 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/104478511?s=40&v=4" width="20" height="20" alt=""> &nbsp; [babelcloud](https://github.com/babelcloud) / [LLM-RGB](https://github.com/babelcloud/LLM-RGB)                                                                                 |    164 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/171735272?s=40&v=4" width="20" height="20" alt=""> &nbsp; [8090-inc](https://github.com/8090-inc) / [xrx-sample-apps](https://github.com/8090-inc/xrx-sample-apps)                                                                       |    163 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/51827949?s=40&v=4" width="20" height="20" alt=""> &nbsp; [deepset-ai](https://github.com/deepset-ai) / [haystack-core-integrations](https://github.com/deepset-ai/haystack-core-integrations)                                            |    163 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/1009716?s=40&v=4" width="20" height="20" alt=""> &nbsp; [codecentric](https://github.com/codecentric) / [c4-genai-suite](https://github.com/codecentric/c4-genai-suite)                                                                  |    152 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/196509932?s=40&v=4" width="20" height="20" alt=""> &nbsp; [XSpoonAi](https://github.com/XSpoonAi) / [spoon-core](https://github.com/XSpoonAi/spoon-core)                                                                                 |    150 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/139558948?s=40&v=4" width="20" height="20" alt=""> &nbsp; [chatchat-space](https://github.com/chatchat-space) / [LangGraph-Chatchat](https://github.com/chatchat-space/LangGraph-Chatchat)                                               |    144 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/134601687?s=40&v=4" width="20" height="20" alt=""> &nbsp; [langfuse](https://github.com/langfuse) / [langfuse-docs](https://github.com/langfuse/langfuse-docs)                                                                           |    139 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/44976328?s=40&v=4" width="20" height="20" alt=""> &nbsp; [piyushgarg-dev](https://github.com/piyushgarg-dev) / [genai-cohort](https://github.com/piyushgarg-dev/genai-cohort)                                                            |    135 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/105285801?s=40&v=4" width="20" height="20" alt=""> &nbsp; [i-dot-ai](https://github.com/i-dot-ai) / [redbox](https://github.com/i-dot-ai/redbox)                                                                                         |    132 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/90423581?s=40&v=4" width="20" height="20" alt=""> &nbsp; [bmd1905](https://github.com/bmd1905) / [ChatOpsLLM](https://github.com/bmd1905/ChatOpsLLM)                                                                                     |    127 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/202074444?s=40&v=4" width="20" height="20" alt=""> &nbsp; [Fintech-Dreamer](https://github.com/Fintech-Dreamer) / [FinSynth](https://github.com/Fintech-Dreamer/FinSynth)                                                                |    121 |
+| <img class="avatar mr-2" src="https://avatars.githubusercontent.com/u/1566555?s=40&v=4" width="20" height="20" alt=""> &nbsp; [kenshiro-o](https://github.com/kenshiro-o) / [nagato-ai](https://github.com/kenshiro-o/nagato-ai)                                                                               |    119 |
 
 ## 🔒 Security & Privacy
 

REVIEW.md

@@ -0,0 +1,54 @@
+# Code Review Instructions
+
+## Database Migrations
+
+### ClickHouse
+
+- ClickHouse migrations in the `packages/shared/clickhouse/migrations/clustered` directory should include `ON CLUSTER default` and should use `Replicated` merge tree table types.
+  - E.g. `ReplacingMergeTree` is likely an error while `ReplicatedReplacingMergeTree` would be correct in most cases.
+- ClickHouse migrations in the `packages/shared/clickhouse/migrations/unclustered` directory must not include `ON CLUSTER` statements and must not use `Replicated` merge tree table types.
+- Migrations in `packages/shared/clickhouse/migrations/clustered` should match their counterparts in `packages/shared/clickhouse/migrations/unclustered` aside from the restrictions listed above.
+- When adding new indexes on ClickHouse, ensure that there is a corresponding `MATERIALIZE INDEX` statement in the same migration. The materialization can use `SETTINGS mutations_sync = 2` if they operate on smaller tables, but may timeout otherwise.
+- All ClickHouse queries on project-scoped tables (traces, observations, scores, events, sessions, etc.) must include `WHERE project_id = {projectId: String}` filter to ensure proper tenant isolation and that queries only access data from the intended project.
+
+### Postgres
+
+- Most `schema.prisma` changes should produce a change in `packages/shared/prisma/migrations`.
+- All Prisma queries on project-scoped tables must include `projectId` in the WHERE clause (e.g., `where: { id: traceId, projectId }`) to ensure proper tenant isolation and that queries only access data from the intended project.
+
+### Environment Variables
+
+- Environment variables should be imported from the `env.mjs/ts` file of the respective package and not from `process.env.*` to ensure validation and typing.
+
+## Redis Invocations
+
+- Highlight usage of `redis.call` invocations. Those may have suboptimal redis cluster routing and will raise errors. Instead, use the native call patterns.
+  Example: `await redis?.call("SET", key, "1", "NX", "EX", TTLSeconds);` should use `await redis?.set(key, "1", "EX", TTLSeconds, "NX");` instead.
+
+## Langfuse Cloud
+
+- When attempting to confirm if the current environment is Langfuse Cloud in the frontend, use the `useLangfuseCloudRegion` hook and never environment variables directly.
+
+## Banner Height System
+
+- Use `top-banner-offset` instead of `top-0` for any elements that are positioned `sticky`, `fixed`, or `absolute` with a global reference point (e.g., `top-0`). This ensures proper spacing when system banners (payment, maintenance, etc.) are displayed.
+- The banner height is managed through CSS variables (`--banner-height` and `--banner-offset`) defined in `web/src/styles/globals.css`.
+- Banner components (like PaymentBanner) dynamically update `--banner-height` using ResizeObserver to track their actual height, ensuring accurate positioning even when banners resize (e.g., on mobile wrapping).
+- Available Tailwind utilities:
+  - `top-banner-offset` / `pt-banner-offset` - For sticky/fixed/absolute positioning and padding
+  - `h-screen-with-banner` / `min-h-screen-with-banner` - For full-height containers accounting for banners
+
+## JavaScript / TypeScript Style
+
+- use concat instead of spread to avoid stack overflow with large arrays
+
+## Seeder
+
+- make sure that for new features with data model changes, the database seeder is adjusted.
+
+## API Documentation
+
+- Whenever a file in `web/src/features/public-api/types` changes, the `fern/apis` definition probably needs to be adjusted, too.
+- `nullish` types should map to `optional<nullable<T>>` in fern.
+- `nullable` types should map to `nullable<T>` in fern.
+- `optional` types should map to `optional<T>` in fern.

docker-compose.build.yml

@@ -17,11 +17,11 @@ services:
     ports:
       - "3000:3000"
     environment: &langfuse-web-env
-      DATABASE_URL: postgresql://postgres:postgres@postgres:5432/postgres
-      NEXTAUTH_SECRET: mysecret
-      SALT: mysalt
-      ENCRYPTION_KEY: "0000000000000000000000000000000000000000000000000000000000000000" # generate via `openssl rand -hex 32`
-      NEXTAUTH_URL: http://localhost:3000
+      DATABASE_URL: ${DATABASE_URL:-postgresql://postgres:postgres@postgres:5432/postgres}
+      NEXTAUTH_SECRET: ${NEXTAUTH_SECRET:-mysecret}
+      SALT: ${SALT:-mysalt}
+      ENCRYPTION_KEY: ${ENCRYPTION_KEY:-0000000000000000000000000000000000000000000000000000000000000000} # generate via `openssl rand -hex 32`
+      NEXTAUTH_URL: ${NEXTAUTH_URL:-http://localhost:3000}
       TELEMETRY_ENABLED: ${TELEMETRY_ENABLED:-true}
       LANGFUSE_ENABLE_EXPERIMENTAL_FEATURES: ${LANGFUSE_ENABLE_EXPERIMENTAL_FEATURES:-false}
       LANGFUSE_INIT_ORG_ID: ${LANGFUSE_INIT_ORG_ID:-}
@@ -82,8 +82,8 @@ services:
     user: "101:101"
     environment:
       CLICKHOUSE_DB: default
-      CLICKHOUSE_USER: clickhouse
-      CLICKHOUSE_PASSWORD: clickhouse
+      CLICKHOUSE_USER: ${CLICKHOUSE_USER:-clickhouse}
+      CLICKHOUSE_PASSWORD: ${CLICKHOUSE_PASSWORD:-clickhouse}
     volumes:
       - langfuse_clickhouse_data:/var/lib/clickhouse
       - langfuse_clickhouse_logs:/var/log/clickhouse-server
@@ -98,13 +98,13 @@ services:
       start_period: 1s
 
   minio:
-    image: docker.io/minio/minio
+    image: cgr.dev/chainguard/minio
     entrypoint: sh
     # create the 'langfuse' bucket before starting the service
     command: -c 'mkdir -p /data/langfuse && minio server --address ":9000" --console-address ":9001" /data'
     environment:
-      MINIO_ROOT_USER: minio
-      MINIO_ROOT_PASSWORD: miniosecret
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minio}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-miniosecret}
     ports:
       - "9090:9000"
       - "9091:9001"
@@ -122,6 +122,7 @@ services:
     restart: always
     command: >
       --requirepass ${REDIS_AUTH:-myredissecret}
+      --maxmemory-policy noeviction
     ports:
       - 6379:6379
     healthcheck:
@@ -131,7 +132,7 @@ services:
       retries: 10
 
   postgres:
-    image: docker.io/postgres:${POSTGRES_VERSION:-latest}
+    image: docker.io/postgres:${POSTGRES_VERSION:-17}
     restart: always
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
@@ -139,9 +140,11 @@ services:
       timeout: 3s
       retries: 10
     environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres
-      POSTGRES_DB: postgres
+      POSTGRES_USER: ${POSTGRES_USER:-postgres}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
+      POSTGRES_DB: ${POSTGRES_DB:-postgres}
+      TZ: UTC
+      PGTZ: UTC
     ports:
       - 5432:5432
     volumes:

docker-compose.dev-azure.yml

@@ -4,8 +4,8 @@ services:
     user: "101:101"
     environment:
       CLICKHOUSE_DB: default
-      CLICKHOUSE_USER: clickhouse
-      CLICKHOUSE_PASSWORD: clickhouse
+      CLICKHOUSE_USER: ${CLICKHOUSE_USER:-clickhouse}
+      CLICKHOUSE_PASSWORD: ${CLICKHOUSE_PASSWORD:-clickhouse}
     volumes:
       - langfuse_clickhouse_data:/var/lib/clickhouse
       - langfuse_clickhouse_logs:/var/log/clickhouse-server
@@ -23,16 +23,40 @@ services:
     volumes:
       - langfuse_azurite_data:/data
 
+  minio:
+    image: cgr.dev/chainguard/minio
+    container_name: ${MINIO_CONTAINER_NAME:-langfuse-minio}
+    entrypoint: sh
+    # create the 'langfuse' bucket before starting the service
+    command: -c 'mkdir -p /data/langfuse && minio server --address ":9000" --console-address ":9001" /data'
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minio}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-miniosecret}
+    ports:
+      - ${HOST_IP:-127.0.0.1}:${MINIO_API_PORT:-9090}:9000
+      - ${HOST_IP:-127.0.0.1}:${MINIO_CONSOLE_PORT:-9091}:9001
+    volumes:
+      - langfuse_minio_data:/data
+    healthcheck:
+      test: ["CMD", "mc", "ready", "local"]
+      interval: 1s
+      timeout: 5s
+      retries: 5
+      start_period: 1s
+    networks:
+      - default
+
   redis:
     image: docker.io/redis:7.2.4
     restart: always
     command: >
       --requirepass ${REDIS_AUTH:-myredissecret}
+      --maxmemory-policy noeviction
     ports:
       - 6379:6379
 
   postgres:
-    image: docker.io/postgres:${POSTGRES_VERSION:-latest}
+    image: docker.io/postgres:${POSTGRES_VERSION:-17}
     restart: always
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
@@ -41,9 +65,11 @@ services:
       retries: 10
     command: ["postgres", "-c", "log_statement=all"]
     environment:
-      - POSTGRES_USER=postgres
-      - POSTGRES_PASSWORD=postgres
-      - POSTGRES_DB=postgres
+      - POSTGRES_USER=${POSTGRES_USER:-postgres}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-postgres}
+      - POSTGRES_DB=${POSTGRES_DB:-postgres}
+      - TZ=UTC
+      - PGTZ=UTC
     ports:
       - 5432:5432
     volumes:
@@ -58,3 +84,6 @@ volumes:
     driver: local
   langfuse_azurite_data:
     driver: local
+  langfuse_minio_data:
+    name: ${MINIO_VOLUME_NAME:-langfuse_minio_data}
+    driver: local

docker-compose.dev-redis-cluster.yml

@@ -4,8 +4,8 @@ services:
     user: "101:101"
     environment:
       CLICKHOUSE_DB: default
-      CLICKHOUSE_USER: clickhouse
-      CLICKHOUSE_PASSWORD: clickhouse
+      CLICKHOUSE_USER: ${CLICKHOUSE_USER:-clickhouse}
+      CLICKHOUSE_PASSWORD: ${CLICKHOUSE_PASSWORD:-clickhouse}
     volumes:
       - langfuse_clickhouse_data:/var/lib/clickhouse
       - langfuse_clickhouse_logs:/var/log/clickhouse-server
@@ -16,13 +16,13 @@ services:
       - postgres
 
   minio:
-    image: docker.io/minio/minio
+    image: cgr.dev/chainguard/minio
     entrypoint: sh
     # create the 'langfuse' bucket before starting the service
     command: -c 'mkdir -p /data/langfuse && minio server --address ":9000" --console-address ":9001" /data'
     environment:
-      MINIO_ACCESS_KEY: minio
-      MINIO_SECRET_KEY: miniosecret
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minio}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-miniosecret}
     ports:
       - 127.0.0.1:9090:9000
       - 127.0.0.1:9091:9001
@@ -36,7 +36,7 @@ services:
       start_period: 1s
 
   postgres:
-    image: docker.io/postgres:${POSTGRES_VERSION:-latest}
+    image: docker.io/postgres:${POSTGRES_VERSION:-17}
     restart: always
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
@@ -45,9 +45,11 @@ services:
       retries: 10
     command: ["postgres", "-c", "log_statement=all"]
     environment:
-      - POSTGRES_USER=postgres
-      - POSTGRES_PASSWORD=postgres
-      - POSTGRES_DB=postgres
+      - POSTGRES_USER=${POSTGRES_USER:-postgres}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-postgres}
+      - POSTGRES_DB=${POSTGRES_DB:-postgres}
+      - TZ=UTC
+      - PGTZ=UTC
     ports:
       - 127.0.0.1:5432:5432
     volumes:
@@ -55,7 +57,7 @@ services:
 
   # Redis Cluster. Requires a Unix host to work for network_mode: host. I.e. tests will fail on windows and mac with this setup.
   redis-node-0:
-    image: docker.io/bitnami/redis-cluster:8.0
+    image: docker.io/bitnamilegacy/redis-cluster:8.0
     network_mode: host
     volumes:
       - redis-cluster_data-0:/bitnami/redis/data
@@ -65,7 +67,7 @@ services:
       REDIS_NODES: 127.0.0.1:6370 127.0.0.1:6371 127.0.0.1:6372 127.0.0.1:6373 127.0.0.1:6374 127.0.0.1:6375
 
   redis-node-1:
-    image: docker.io/bitnami/redis-cluster:8.0
+    image: docker.io/bitnamilegacy/redis-cluster:8.0
     network_mode: host
     volumes:
       - redis-cluster_data-1:/bitnami/redis/data
@@ -75,7 +77,7 @@ services:
       REDIS_NODES: 127.0.0.1:6370 127.0.0.1:6371 127.0.0.1:6372 127.0.0.1:6373 127.0.0.1:6374 127.0.0.1:6375
 
   redis-node-2:
-    image: docker.io/bitnami/redis-cluster:8.0
+    image: docker.io/bitnamilegacy/redis-cluster:8.0
     network_mode: host
     volumes:
       - redis-cluster_data-2:/bitnami/redis/data
@@ -85,7 +87,7 @@ services:
       REDIS_NODES: 127.0.0.1:6370 127.0.0.1:6371 127.0.0.1:6372 127.0.0.1:6373 127.0.0.1:6374 127.0.0.1:6375
 
   redis-node-3:
-    image: docker.io/bitnami/redis-cluster:8.0
+    image: docker.io/bitnamilegacy/redis-cluster:8.0
     network_mode: host
     volumes:
       - redis-cluster_data-3:/bitnami/redis/data
@@ -95,7 +97,7 @@ services:
       REDIS_NODES: 127.0.0.1:6370 127.0.0.1:6371 127.0.0.1:6372 127.0.0.1:6373 127.0.0.1:6374 127.0.0.1:6375
 
   redis-node-4:
-    image: docker.io/bitnami/redis-cluster:8.0
+    image: docker.io/bitnamilegacy/redis-cluster:8.0
     network_mode: host
     volumes:
       - redis-cluster_data-4:/bitnami/redis/data
@@ -105,7 +107,7 @@ services:
       REDIS_NODES: 127.0.0.1:6370 127.0.0.1:6371 127.0.0.1:6372 127.0.0.1:6373 127.0.0.1:6374 127.0.0.1:6375
 
   redis-node-5:
-    image: docker.io/bitnami/redis-cluster:8.0
+    image: docker.io/bitnamilegacy/redis-cluster:8.0
     network_mode: host
     volumes:
       - redis-cluster_data-5:/bitnami/redis/data

docker-compose.dev.yml

@@ -1,31 +1,37 @@
 services:
   clickhouse:
-    image: docker.io/clickhouse/clickhouse-server:24.3
+    # Upgrade from 24.3 to check behaviour on new events table.
+    # Unit tests still verify 24.3 behaviour using -azure and -redis-cluster configs.
+    image: docker.io/clickhouse/clickhouse-server:25.8
     user: "101:101"
+    container_name: ${CLICKHOUSE_CONTAINER_NAME:-langfuse-clickhouse}
     environment:
       CLICKHOUSE_DB: default
-      CLICKHOUSE_USER: clickhouse
-      CLICKHOUSE_PASSWORD: clickhouse
+      CLICKHOUSE_USER: ${CLICKHOUSE_USER:-clickhouse}
+      CLICKHOUSE_PASSWORD: ${CLICKHOUSE_PASSWORD:-clickhouse}
     volumes:
       - langfuse_clickhouse_data:/var/lib/clickhouse
       - langfuse_clickhouse_logs:/var/log/clickhouse-server
     ports:
-      - 127.0.0.1:8123:8123
-      - 127.0.0.1:9000:9000
+      - ${HOST_IP:-127.0.0.1}:${CLICKHOUSE_HTTP_PORT:-8123}:8123
+      - ${HOST_IP:-127.0.0.1}:${CLICKHOUSE_NATIVE_PORT:-9000}:9000
     depends_on:
       - postgres
+    networks:
+      - default
 
   minio:
-    image: docker.io/minio/minio
+    image: cgr.dev/chainguard/minio
+    container_name: ${MINIO_CONTAINER_NAME:-langfuse-minio}
     entrypoint: sh
     # create the 'langfuse' bucket before starting the service
     command: -c 'mkdir -p /data/langfuse && minio server --address ":9000" --console-address ":9001" /data'
     environment:
-      MINIO_ACCESS_KEY: minio
-      MINIO_SECRET_KEY: miniosecret
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minio}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-miniosecret}
     ports:
-      - 127.0.0.1:9090:9000
-      - 127.0.0.1:9091:9001
+      - ${HOST_IP:-127.0.0.1}:${MINIO_API_PORT:-9090}:9000
+      - ${HOST_IP:-127.0.0.1}:${MINIO_CONSOLE_PORT:-9091}:9001
     volumes:
       - langfuse_minio_data:/data
     healthcheck:
@@ -34,17 +40,24 @@ services:
       timeout: 5s
       retries: 5
       start_period: 1s
+    networks:
+      - default
 
   redis:
     image: docker.io/redis:7.2.4
+    container_name: ${REDIS_CONTAINER_NAME:-langfuse-redis}
     restart: always
     command: >
       --requirepass ${REDIS_AUTH:-myredissecret}
+      --maxmemory-policy noeviction
     ports:
-      - 127.0.0.1:6379:6379
+      - ${HOST_IP:-127.0.0.1}:${REDIS_HOST_PORT:-6379}:6379
+    networks:
+      - default
 
   postgres:
-    image: docker.io/postgres:${POSTGRES_VERSION:-latest}
+    image: docker.io/postgres:${POSTGRES_VERSION:-17}
+    container_name: ${POSTGRES_CONTAINER_NAME:-langfuse-postgres}
     restart: always
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
@@ -53,20 +66,33 @@ services:
       retries: 10
     command: ["postgres", "-c", "log_statement=all"]
     environment:
-      - POSTGRES_USER=postgres
-      - POSTGRES_PASSWORD=postgres
-      - POSTGRES_DB=postgres
+      - POSTGRES_USER=${POSTGRES_USER:-postgres}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-postgres}
+      - POSTGRES_DB=${POSTGRES_DB:-postgres}
+      - TZ=UTC
+      - PGTZ=UTC
     ports:
-      - 127.0.0.1:5432:5432
+      - ${HOST_IP:-127.0.0.1}:${POSTGRES_HOST_PORT:-5432}:5432
     volumes:
       - langfuse_postgres_data:/var/lib/postgresql/data
+    networks:
+      - default
 
 volumes:
   langfuse_postgres_data:
+    name: ${POSTGRES_VOLUME_NAME:-langfuse_postgres_data}
     driver: local
   langfuse_clickhouse_data:
+    name: ${CLICKHOUSE_DATA_VOLUME_NAME:-langfuse_clickhouse_data}
     driver: local
   langfuse_clickhouse_logs:
+    name: ${CLICKHOUSE_LOGS_VOLUME_NAME:-langfuse_clickhouse_logs}
     driver: local
   langfuse_minio_data:
+    name: ${MINIO_VOLUME_NAME:-langfuse_minio_data}
     driver: local
+
+networks:
+  default:
+    name: ${DOCKER_NETWORK_NAME:-langfuse-network}
+    driver: bridge

docker-compose.yml

@@ -19,9 +19,10 @@ services:
     ports:
       - 127.0.0.1:3030:3030
     environment: &langfuse-worker-env
-      DATABASE_URL: postgresql://postgres:postgres@postgres:5432/postgres # CHANGEME
-      SALT: "mysalt" # CHANGEME
-      ENCRYPTION_KEY: "0000000000000000000000000000000000000000000000000000000000000000" # CHANGEME: generate via `openssl rand -hex 32`
+      NEXTAUTH_URL: ${NEXTAUTH_URL:-http://localhost:3000}
+      DATABASE_URL: ${DATABASE_URL:-postgresql://postgres:postgres@postgres:5432/postgres} # CHANGEME
+      SALT: ${SALT:-mysalt} # CHANGEME
+      ENCRYPTION_KEY: ${ENCRYPTION_KEY:-0000000000000000000000000000000000000000000000000000000000000000} # CHANGEME: generate via `openssl rand -hex 32`
       TELEMETRY_ENABLED: ${TELEMETRY_ENABLED:-true}
       LANGFUSE_ENABLE_EXPERIMENTAL_FEATURES: ${LANGFUSE_ENABLE_EXPERIMENTAL_FEATURES:-true}
       CLICKHOUSE_MIGRATION_URL: ${CLICKHOUSE_MIGRATION_URL:-clickhouse://clickhouse:9000}
@@ -73,8 +74,7 @@ services:
       - 3000:3000
     environment:
       <<: *langfuse-worker-env
-      NEXTAUTH_URL: http://localhost:3000
-      NEXTAUTH_SECRET: mysecret # CHANGEME
+      NEXTAUTH_SECRET: ${NEXTAUTH_SECRET:-mysecret} # CHANGEME
       LANGFUSE_INIT_ORG_ID: ${LANGFUSE_INIT_ORG_ID:-}
       LANGFUSE_INIT_ORG_NAME: ${LANGFUSE_INIT_ORG_NAME:-}
       LANGFUSE_INIT_PROJECT_ID: ${LANGFUSE_INIT_PROJECT_ID:-}
@@ -91,8 +91,8 @@ services:
     user: "101:101"
     environment:
       CLICKHOUSE_DB: default
-      CLICKHOUSE_USER: clickhouse
-      CLICKHOUSE_PASSWORD: clickhouse # CHANGEME
+      CLICKHOUSE_USER: ${CLICKHOUSE_USER:-clickhouse}
+      CLICKHOUSE_PASSWORD: ${CLICKHOUSE_PASSWORD:-clickhouse} # CHANGEME
     volumes:
       - langfuse_clickhouse_data:/var/lib/clickhouse
       - langfuse_clickhouse_logs:/var/log/clickhouse-server
@@ -107,14 +107,14 @@ services:
       start_period: 1s
 
   minio:
-    image: docker.io/minio/minio
+    image: cgr.dev/chainguard/minio
     restart: always
     entrypoint: sh
     # create the 'langfuse' bucket before starting the service
     command: -c 'mkdir -p /data/langfuse && minio server --address ":9000" --console-address ":9001" /data'
     environment:
-      MINIO_ROOT_USER: minio
-      MINIO_ROOT_PASSWORD: miniosecret # CHANGEME
+      MINIO_ROOT_USER: ${MINIO_ROOT_USER:-minio}
+      MINIO_ROOT_PASSWORD: ${MINIO_ROOT_PASSWORD:-miniosecret} # CHANGEME
     ports:
       - 9090:9000
       - 127.0.0.1:9091:9001
@@ -133,6 +133,7 @@ services:
     # CHANGEME: row below to secure redis password
     command: >
       --requirepass ${REDIS_AUTH:-myredissecret}
+      --maxmemory-policy noeviction
     ports:
       - 127.0.0.1:6379:6379
     healthcheck:
@@ -142,7 +143,7 @@ services:
       retries: 10
 
   postgres:
-    image: docker.io/postgres:${POSTGRES_VERSION:-latest}
+    image: docker.io/postgres:${POSTGRES_VERSION:-17}
     restart: always
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U postgres"]
@@ -150,9 +151,11 @@ services:
       timeout: 3s
       retries: 10
     environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: postgres # CHANGEME
-      POSTGRES_DB: postgres
+      POSTGRES_USER: ${POSTGRES_USER:-postgres}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres} # CHANGEME
+      POSTGRES_DB: ${POSTGRES_DB:-postgres}
+      TZ: UTC
+      PGTZ: UTC
     ports:
       - 127.0.0.1:5432:5432
     volumes:

ee/.eslintrc.js

@@ -1,8 +0,0 @@
-/** @type {import("eslint").Linter.Config} */
-module.exports = {
-  extends: ["@repo/eslint-config/library.js"],
-  parser: "@typescript-eslint/parser",
-  parserOptions: {
-    project: true,
-  },
-};

ee/eslint.config.mjs

@@ -0,0 +1,3 @@
+import baseConfig from "@repo/eslint-config";
+
+export default [...baseConfig];

ee/package.json

@@ -15,35 +15,37 @@
     }
   },
   "engines": {
-    "node": "20"
+    "node": "24"
   },
   "scripts": {
     "build": "tsc",
+    "build:check": "tsc",
+    "typecheck": "dotenv -e ../../.env -- tsgo --noEmit --skipLibCheck --incremental --tsBuildInfoFile .tsbuildinfo",
     "dev": "tsc --watch",
-    "lint": "eslint . --ext .js,.jsx,.ts,.tsx --max-warnings 0",
-    "lint:fix": "eslint . --ext .js,.jsx,.ts,.tsx --fix"
+    "lint": "eslint . --cache --cache-location dist/.eslintcache --max-warnings 0",
+    "lint:fix": "eslint . --cache --cache-location dist/.eslintcache --fix"
   },
   "dependencies": {
     "@langfuse/shared": "workspace:*",
     "@opentelemetry/api": ">=1.0.0 <1.10.0",
-    "axios": "^1.8.2",
     "https-proxy-agent": "^7.0.6",
-    "next": "^14.2.30",
-    "next-auth": "^4.24.11",
+    "next": "15.5.9",
+    "next-auth": "^4.24.13",
     "zod": "^3.25.62"
   },
   "devDependencies": {
     "@repo/eslint-config": "workspace:*",
     "@repo/typescript-config": "workspace:*",
-    "@types/node": "^20.11.29",
-    "@typescript-eslint/parser": "^7.12.0",
-    "eslint": "^8.57.0",
-    "eslint-config-prettier": "^9.1.0",
+    "@types/node": "^24.3.0",
+    "@typescript-eslint/parser": "^8.50.1",
+    "@typescript/native-preview": "7.0.0-dev.20260122.3",
+    "eslint": "^9.39.2",
+    "eslint-config-prettier": "^10.1.8",
     "eslint-config-standard": "^17.1.0",
-    "eslint-plugin-prettier": "^5.1.3",
+    "eslint-plugin-prettier": "^5.5.4",
     "prettier": "^3.6.2",
     "ts-node": "^10.9.2",
     "tsc-watch": "^6.2.0",
-    "typescript": "^5.4.5"
+    "typescript": "^5.7.2"
   }
 }

ee/tsconfig.json

@@ -3,10 +3,10 @@
   "compilerOptions": {
     "moduleResolution": "NodeNext",
     "module": "NodeNext",
-    "lib": ["ES2020"],
+    "lib": ["es2023"],
     "outDir": "./dist",
     "types": ["node"],
-    "target": "ES2020",
+    "target": "es2024",
     "rootDir": "."
   },
   "include": ["."],

fern/apis/client/definition/score.yml

@@ -18,7 +18,9 @@ types:
       sessionId: optional<string>
       observationId: optional<string>
       datasetRunId: optional<string>
-      name: string
+      name:
+        type: string
+        docs: The name of the score. Always overrides "output" for correction scores.
       value:
         type: CreateScoreValue
         docs: The value of the score. Must be passed as string for categorical scores, and numeric for boolean and numeric scores. Boolean score values must equal either 1 or 0 (true or false)
@@ -81,10 +83,11 @@ types:
       - NUMERIC
       - CATEGORICAL
       - BOOLEAN
+      - CORRECTION
 
   CreateScoreValue:
     discriminated: false
     union:
       - double
       - string
-    docs: The value of the score. Must be passed as string for categorical scores, and numeric for boolean and numeric scores
+    docs: The value of the score. Must be passed as string for categorical scores, and numeric for boolean and numeric scores. For corrections pass value as string and set data type to CORRECTION

fern/apis/organizations/definition/organizations.yml

@@ -14,7 +14,7 @@ service:
       errors:
         - commons.UnauthorizedError
         - commons.MethodNotAllowedError
-    
+
     create:
       docs: Create a new organization
       method: POST
@@ -32,7 +32,7 @@ service:
         - commons.Error
         - commons.UnauthorizedError
         - commons.MethodNotAllowedError
-    
+
     getById:
       docs: Get organization by ID
       method: GET
@@ -44,7 +44,7 @@ service:
         - commons.Error
         - commons.UnauthorizedError
         - commons.MethodNotAllowedError
-    
+
     update:
       docs: Update an organization
       method: PUT
@@ -64,7 +64,7 @@ service:
         - commons.Error
         - commons.UnauthorizedError
         - commons.MethodNotAllowedError
-    
+
     delete:
       docs: Delete an organization
       method: DELETE
@@ -137,6 +137,18 @@ types:
       metadata:
         type: map<string, unknown>
         docs: Metadata for the organization
+      projects: list<OrganizationProject>
+
+  OrganizationProject:
+    docs: Project belonging to an organization
+    properties:
+      id: string
+      name: string
+      metadata:
+        type: optional<map<string, unknown>>
+        docs: Metadata for the project
+      createdAt: datetime
+      updatedAt: datetime
 
   DeleteOrganizationResponse:
     docs: Response for successful organization deletion

fern/apis/server/definition/annotation-queues.yml

@@ -22,6 +22,13 @@ service:
             docs: limit of items per page
       response: PaginatedAnnotationQueues
 
+    createQueue:
+      docs: Create an annotation queue
+      method: POST
+      path: /annotation-queues
+      request: CreateAnnotationQueueRequest
+      response: AnnotationQueue
+
     getQueue:
       docs: Get an annotation queue by ID
       method: GET
@@ -105,6 +112,28 @@ service:
           docs: The unique identifier of the annotation queue item
       response: DeleteAnnotationQueueItemResponse
 
+    createQueueAssignment:
+      docs: Create an assignment for a user to an annotation queue
+      method: POST
+      path: /annotation-queues/{queueId}/assignments
+      path-parameters:
+        queueId:
+          type: string
+          docs: The unique identifier of the annotation queue
+      request: AnnotationQueueAssignmentRequest
+      response: CreateAnnotationQueueAssignmentResponse
+
+    deleteQueueAssignment:
+      docs: Delete an assignment for a user to an annotation queue
+      method: DELETE
+      path: /annotation-queues/{queueId}/assignments
+      path-parameters:
+        queueId:
+          type: string
+          docs: The unique identifier of the annotation queue
+      request: AnnotationQueueAssignmentRequest
+      response: DeleteAnnotationQueueAssignmentResponse
+
 types:
   AnnotationQueueStatus:
     enum:
@@ -115,6 +144,7 @@ types:
     enum:
       - TRACE
       - OBSERVATION
+      - SESSION
 
   AnnotationQueue:
     properties:
@@ -146,6 +176,12 @@ types:
       data: list<AnnotationQueueItem>
       meta: pagination.MetaResponse
 
+  CreateAnnotationQueueRequest:
+    properties:
+      name: string
+      description: optional<string>
+      scoreConfigIds: list<string>
+
   CreateAnnotationQueueItemRequest:
     properties:
       objectId: string
@@ -163,3 +199,17 @@ types:
     properties:
       success: boolean
       message: string
+
+  AnnotationQueueAssignmentRequest:
+    properties:
+      userId: string
+
+  DeleteAnnotationQueueAssignmentResponse:
+    properties:
+      success: boolean
+
+  CreateAnnotationQueueAssignmentResponse:
+    properties:
+      userId: string
+      queueId: string
+      projectId: string

fern/apis/server/definition/blob-storage-integrations.yml

@@ -0,0 +1,119 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/fern-api/fern/main/fern.schema.json
+imports:
+  commons: ./commons.yml
+
+service:
+  auth: true
+  base-path: /api/public/integrations/blob-storage
+  endpoints:
+    getBlobStorageIntegrations:
+      docs: Get all blob storage integrations for the organization (requires organization-scoped API key)
+      method: GET
+      path: ""
+      response: BlobStorageIntegrationsResponse
+
+    upsertBlobStorageIntegration:
+      docs: Create or update a blob storage integration for a specific project (requires organization-scoped API key). The configuration is validated by performing a test upload to the bucket.
+      method: PUT
+      path: ""
+      request: CreateBlobStorageIntegrationRequest
+      response: BlobStorageIntegrationResponse
+
+    deleteBlobStorageIntegration:
+      docs: Delete a blob storage integration by ID (requires organization-scoped API key)
+      method: DELETE
+      path: "/{id}"
+      path-parameters:
+        id: string
+      response: BlobStorageIntegrationDeletionResponse
+
+types:
+  BlobStorageIntegrationType:
+    enum:
+      - S3
+      - S3_COMPATIBLE
+      - AZURE_BLOB_STORAGE
+
+  BlobStorageIntegrationFileType:
+    enum:
+      - JSON
+      - CSV
+      - JSONL
+
+  BlobStorageExportMode:
+    enum:
+      - FULL_HISTORY
+      - FROM_TODAY
+      - FROM_CUSTOM_DATE
+
+  BlobStorageExportFrequency:
+    enum:
+      - hourly
+      - daily
+      - weekly
+
+  CreateBlobStorageIntegrationRequest:
+    properties:
+      projectId:
+        type: string
+        docs: ID of the project in which to configure the blob storage integration
+      type: BlobStorageIntegrationType
+      bucketName:
+        type: string
+        docs: Name of the storage bucket
+      endpoint:
+        type: optional<string>
+        docs: Custom endpoint URL (required for S3_COMPATIBLE type)
+      region:
+        type: string
+        docs: Storage region
+      accessKeyId:
+        type: optional<string>
+        docs: Access key ID for authentication
+      secretAccessKey:
+        type: optional<string>
+        docs: Secret access key for authentication (will be encrypted when stored)
+      prefix:
+        type: optional<string>
+        docs: Path prefix for exported files (must end with forward slash if provided)
+      exportFrequency: BlobStorageExportFrequency
+      enabled:
+        type: boolean
+        docs: Whether the integration is active
+      forcePathStyle:
+        type: boolean
+        docs: Use path-style URLs for S3 requests
+      fileType: BlobStorageIntegrationFileType
+      exportMode: BlobStorageExportMode
+      exportStartDate:
+        type: optional<datetime>
+        docs: Custom start date for exports (required when exportMode is FROM_CUSTOM_DATE)
+
+  BlobStorageIntegrationResponse:
+    properties:
+      id: string
+      projectId: string
+      type: BlobStorageIntegrationType
+      bucketName: string
+      endpoint: optional<string>
+      region: string
+      accessKeyId: optional<string>
+      prefix: string
+      exportFrequency: BlobStorageExportFrequency
+      enabled: boolean
+      forcePathStyle: boolean
+      fileType: BlobStorageIntegrationFileType
+      exportMode: BlobStorageExportMode
+      exportStartDate: optional<datetime>
+      nextSyncAt: optional<datetime>
+      lastSyncAt: optional<datetime>
+      createdAt: datetime
+      updatedAt: datetime
+
+  BlobStorageIntegrationsResponse:
+    properties:
+      data: list<BlobStorageIntegrationResponse>
+
+  BlobStorageIntegrationDeletionResponse:
+    properties:
+      message: string

fern/apis/server/definition/comments.yml

@@ -58,7 +58,7 @@ types:
         docs: The id of the object to attach the comment to. If this does not reference a valid existing object, an error will be thrown.
       content:
         type: string
-        docs: The content of the comment. May include markdown. Currently limited to 3000 characters.
+        docs: The content of the comment. May include markdown. Currently limited to 5000 characters.
       authorUserId:
         type: optional<string>
         docs: The id of the user who created the comment.

fern/apis/server/definition/commons.yml

@@ -1,5 +1,6 @@
 types:
   # Objects
+  # Source: web/src/features/public-api/types/traces.ts - APITrace, APIExtendedTrace, GetTraceV1Response
   Trace:
     properties:
       id:
@@ -9,7 +10,7 @@ types:
         type: datetime
         docs: The timestamp when the trace was created
       name:
-        type: optional<string>
+        type: nullable<string>
         docs: The name of the trace
       input:
         type: optional<unknown>
@@ -18,28 +19,28 @@ types:
         type: optional<unknown>
         docs: The output data of the trace. Can be any JSON.
       sessionId:
-        type: optional<string>
+        type: nullable<string>
         docs: The session identifier associated with the trace
       release:
-        type: optional<string>
+        type: nullable<string>
         docs: The release version of the application when the trace was created
       version:
-        type: optional<string>
+        type: nullable<string>
         docs: The version of the trace
       userId:
-        type: optional<string>
+        type: nullable<string>
         docs: The user identifier associated with the trace
       metadata:
         type: optional<unknown>
         docs: The metadata associated with the trace. Can be any JSON.
       tags:
-        type: optional<list<string>>
-        docs: The tags associated with the trace. Can be an array of strings or null.
+        type: list<string>
+        docs: The tags associated with the trace.
       public:
-        type: optional<boolean>
+        type: boolean
         docs: Public traces are accessible via url without login
       environment:
-        type: optional<string>
+        type: string
         docs: The environment from which this trace originated. Can be any lowercase alphanumeric string with hyphens and underscores that does not start with 'langfuse'.
   TraceWithDetails: # GET /traces
     extends: Trace
@@ -48,16 +49,16 @@ types:
         type: string
         docs: Path of trace in Langfuse UI
       latency:
-        type: double
+        type: optional<nullable<double>>
         docs: Latency of trace in seconds
       totalCost:
-        type: double
+        type: optional<nullable<double>>
         docs: Cost of trace in USD
       observations:
-        type: list<string>
+        type: optional<nullable<list<string>>>
         docs: List of observation ids
       scores:
-        type: list<string>
+        type: optional<nullable<list<string>>>
         docs: List of score ids
   TraceWithFullDetails: # GET traces/[traceID]
     extends: Trace
@@ -66,10 +67,10 @@ types:
         type: string
         docs: Path of trace in Langfuse UI
       latency:
-        type: double
+        type: optional<nullable<double>>
         docs: Latency of trace in seconds
       totalCost:
-        type: double
+        type: optional<nullable<double>>
         docs: Cost of trace in USD
       observations:
         type: list<ObservationsView>
@@ -77,119 +78,121 @@ types:
       scores:
         type: list<ScoreV1>
         docs: List of scores
+  # Source: web/src/features/public-api/types/sessions.ts - APISession
   Session:
     properties:
       id: string
       createdAt: datetime
       projectId: string
       environment:
-        type: optional<string>
+        type: string
         docs: The environment from which this session originated.
   SessionWithTraces:
     extends: Session
     properties:
       traces: list<Trace>
+  # Source: web/src/features/public-api/types/observations.ts - APIObservation
   Observation:
     properties:
       id:
         type: string
         docs: The unique identifier of the observation
       traceId:
-        type: optional<string>
+        type: nullable<string>
         docs: The trace ID associated with the observation
       type:
         type: string
         docs: The type of the observation
       name:
-        type: optional<string>
+        type: nullable<string>
         docs: The name of the observation
       startTime:
         type: datetime
         docs: The start time of the observation
       endTime:
-        type: optional<datetime>
+        type: nullable<datetime>
         docs: The end time of the observation.
       completionStartTime:
-        type: optional<datetime>
+        type: nullable<datetime>
         docs: The completion start time of the observation
       model:
-        type: optional<string>
+        type: nullable<string>
         docs: The model used for the observation
       modelParameters:
-        type: optional<map<string, MapValue>>
+        type: unknown
         docs: The parameters of the model used for the observation
       input:
-        type: optional<unknown>
+        type: unknown
         docs: The input data of the observation
       version:
-        type: optional<string>
+        type: nullable<string>
         docs: The version of the observation
       metadata:
-        type: optional<unknown>
+        type: unknown
         docs: Additional metadata of the observation
       output:
-        type: optional<unknown>
+        type: unknown
         docs: The output data of the observation
       usage:
-        type: optional<Usage>
+        type: Usage
         docs: (Deprecated. Use usageDetails and costDetails instead.) The usage data of the observation
       level:
         type: ObservationLevel
         docs: The level of the observation
       statusMessage:
-        type: optional<string>
+        type: nullable<string>
         docs: The status message of the observation
       parentObservationId:
-        type: optional<string>
+        type: nullable<string>
         docs: The parent observation ID
       promptId:
-        type: optional<string>
+        type: nullable<string>
         docs: The prompt ID associated with the observation
       usageDetails:
-        type: optional<map<string, integer>>
+        type: map<string, integer>
         docs: The usage details of the observation. Key is the name of the usage metric, value is the number of units consumed. The total key is the sum of all (non-total) usage metrics or the total value ingested.
       costDetails:
-        type: optional<map<string, double>>
+        type: map<string, double>
         docs: The cost details of the observation. Key is the name of the cost metric, value is the cost in USD. The total key is the sum of all (non-total) cost metrics or the total value ingested.
       environment:
-        type: optional<string>
+        type: string
         docs: The environment from which this observation originated. Can be any lowercase alphanumeric string with hyphens and underscores that does not start with 'langfuse'.
 
   ObservationsView:
     extends: Observation
     properties:
       promptName:
-        type: optional<string>
+        type: nullable<string>
         docs: The name of the prompt associated with the observation
       promptVersion:
-        type: optional<integer>
+        type: nullable<integer>
         docs: The version of the prompt associated with the observation
       modelId:
-        type: optional<string>
+        type: nullable<string>
         docs: The unique identifier of the model
       inputPrice:
-        type: optional<double>
+        type: nullable<double>
         docs: The price of the input in USD
       outputPrice:
-        type: optional<double>
+        type: nullable<double>
         docs: The price of the output in USD.
       totalPrice:
-        type: optional<double>
+        type: nullable<double>
         docs: The total price in USD.
       calculatedInputCost:
-        type: optional<double>
+        type: nullable<double>
         docs: (Deprecated. Use usageDetails and costDetails instead.) The calculated cost of the input in USD
       calculatedOutputCost:
-        type: optional<double>
+        type: nullable<double>
         docs: (Deprecated. Use usageDetails and costDetails instead.) The calculated cost of the output in USD
       calculatedTotalCost:
-        type: optional<double>
+        type: nullable<double>
         docs: (Deprecated. Use usageDetails and costDetails instead.) The calculated total cost in USD
       latency:
-        type: optional<double>
+        type: nullable<double>
         docs: The latency in seconds.
       timeToFirstToken:
-        type: optional<double>
+        type: nullable<double>
         docs: The time to the first token in seconds
 
   Usage:
@@ -197,14 +200,16 @@ types:
     properties:
       input:
         docs: Number of input units (e.g. tokens)
-        type: optional<integer>
+        type: integer
       output:
         docs: Number of output units (e.g. tokens)
-        type: optional<integer>
+        type: integer
       total:
         docs: Defaults to input+output if not set
-        type: optional<integer>
-      unit: optional<ModelUsageUnit>
+        type: integer
+      unit:
+        docs: Unit of measurement
+        type: nullable<string>
       inputCost:
         docs: USD input cost
         type: optional<double>
@@ -214,6 +219,7 @@ types:
       totalCost:
         docs: USD total cost, defaults to input+output
         type: optional<double>
+  # Source: web/src/features/public-api/types/score-configs.ts - APIScoreConfig
   ScoreConfig:
     docs: Configuration for a score
     properties:
@@ -222,45 +228,56 @@ types:
       createdAt: datetime
       updatedAt: datetime
       projectId: string
-      dataType: ScoreDataType
+      dataType: ScoreConfigDataType
       isArchived:
         type: boolean
         docs: Whether the score config is archived. Defaults to false
       minValue:
-        type: optional<double>
+        type: optional<nullable<double>>
         docs: Sets minimum value for numerical scores. If not set, the minimum value defaults to -∞
       maxValue:
-        type: optional<double>
+        type: optional<nullable<double>>
         docs: Sets maximum value for numerical scores. If not set, the maximum value defaults to +∞
       categories:
         type: optional<list<ConfigCategory>>
         docs: Configures custom categories for categorical scores
-      description: optional<string>
+      description:
+        type: optional<nullable<string>>
+        docs: Description of the score config
   ConfigCategory:
     properties:
       value: double
       label: string
+  # Source: packages/shared/src/features/scores/interfaces/api/v1/schemas.ts - APIScoreSchemaV1
   BaseScoreV1:
     properties:
       id: string
       traceId: string
       name: string
       source: ScoreSource
-      observationId: optional<string>
+      observationId:
+        type: optional<nullable<string>>
+        docs: The observation ID associated with the score
       timestamp: datetime
       createdAt: datetime
       updatedAt: datetime
-      authorUserId: optional<string>
-      comment: optional<string>
-      metadata: optional<unknown>
+      authorUserId:
+        type: nullable<string>
+        docs: The user ID of the author
+      comment:
+        type: nullable<string>
+        docs: Comment on the score
+      metadata:
+        type: unknown
+        docs: Metadata associated with the score
       configId:
-        type: optional<string>
+        type: nullable<string>
         docs: Reference a score config on a score. When set, config and score name must be equal and value must comply to optionally defined numerical range
       queueId:
-        type: optional<string>
-        docs: Reference an annotation queue on a score. Populated if the score was initially created in an annotation queue.
+        type: nullable<string>
+        docs: The annotation queue referenced by the score. Indicates if score was initially created while processing annotation queue.
       environment:
-        type: optional<string>
+        type: string
         docs: The environment from which this score originated. Can be any lowercase alphanumeric string with hyphens and underscores that does not start with 'langfuse'.
   NumericScoreV1:
     extends: BaseScoreV1
@@ -281,8 +298,8 @@ types:
     extends: BaseScoreV1
     properties:
       value:
-        type: optional<double>
-        docs: Only defined if a config is linked. Represents the numeric category mapping of the stringValue
+        type: double
+        docs: Represents the numeric category mapping of the stringValue. If no config is linked, defaults to 0.
       stringValue:
         type: string
         docs: The string representation of the score value. If no config is linked, can be any string. Otherwise, must map to a config category
@@ -299,29 +316,44 @@ types:
         type: BooleanScoreV1
         docs: "Score with BOOLEAN data type"
 
+  # Source: packages/shared/src/features/scores/interfaces/api/v2/schemas.ts - APIScoreSchemaV2
   BaseScore:
     properties:
       id: string
-      traceId: optional<string>
-      sessionId: optional<string>
-      observationId: optional<string>
-      datasetRunId: optional<string>
+      traceId:
+        type: optional<nullable<string>>
+        docs: The trace ID associated with the score
+      sessionId:
+        type: optional<nullable<string>>
+        docs: The session ID associated with the score
+      observationId:
+        type: optional<nullable<string>>
+        docs: The observation ID associated with the score
+      datasetRunId:
+        type: optional<nullable<string>>
+        docs: The dataset run ID associated with the score
       name: string
       source: ScoreSource
       timestamp: datetime
       createdAt: datetime
       updatedAt: datetime
-      authorUserId: optional<string>
-      comment: optional<string>
-      metadata: optional<unknown>
+      authorUserId:
+        type: nullable<string>
+        docs: The user ID of the author
+      comment:
+        type: nullable<string>
+        docs: Comment on the score
+      metadata:
+        type: unknown
+        docs: Metadata associated with the score
       configId:
-        type: optional<string>
+        type: nullable<string>
         docs: Reference a score config on a score. When set, config and score name must be equal and value must comply to optionally defined numerical range
       queueId:
-        type: optional<string>
-        docs: Reference an annotation queue on a score. Populated if the score was initially created in an annotation queue.
+        type: nullable<string>
+        docs: The annotation queue referenced by the score. Indicates if score was initially created while processing annotation queue.
       environment:
-        type: optional<string>
+        type: string
         docs: The environment from which this score originated. Can be any lowercase alphanumeric string with hyphens and underscores that does not start with 'langfuse'.
   NumericScore:
     extends: BaseScore
@@ -342,8 +374,8 @@ types:
     extends: BaseScore
     properties:
       value:
-        type: optional<double>
-        docs: Only defined if a config is linked. Represents the numeric category mapping of the stringValue
+        type: double
+        docs: Represents the numeric category mapping of the stringValue. If no config is linked, defaults to 0.
       stringValue:
         type: string
         docs: The string representation of the score value. If no config is linked, can be any string. Otherwise, must map to a config category
@@ -367,6 +399,7 @@ types:
       - string
     docs: The value of the score. Must be passed as string for categorical scores, and numeric for boolean and numeric scores
 
+  # Source: web/src/features/public-api/types/comments.ts - APIComment
   Comment:
     properties:
       id: string
@@ -376,30 +409,55 @@ types:
       objectType: CommentObjectType
       objectId: string
       content: string
-      authorUserId: optional<string>
+      authorUserId:
+        type: optional<nullable<string>>
+        docs: The user ID of the comment author
 
+  # Source: web/src/features/public-api/types/datasets.ts - APIDataset
   Dataset:
     properties:
       id: string
       name: string
-      description: optional<string>
-      metadata: optional<unknown>
+      description:
+        type: nullable<string>
+        docs: Description of the dataset
+      metadata:
+        type: unknown
+        docs: Metadata associated with the dataset
+      inputSchema:
+        type: nullable<unknown>
+        docs: JSON Schema for validating dataset item inputs
+      expectedOutputSchema:
+        type: nullable<unknown>
+        docs: JSON Schema for validating dataset item expected outputs
       projectId: string
       createdAt: datetime
       updatedAt: datetime
+  # Source: web/src/features/public-api/types/datasets.ts - APIDatasetItem
   DatasetItem:
     properties:
       id: string
       status: DatasetStatus
-      input: optional<unknown>
-      expectedOutput: optional<unknown>
-      metadata: optional<unknown>
-      sourceTraceId: optional<string>
-      sourceObservationId: optional<string>
+      input:
+        type: unknown
+        docs: Input data for the dataset item
+      expectedOutput:
+        type: unknown
+        docs: Expected output for the dataset item
+      metadata:
+        type: unknown
+        docs: Metadata associated with the dataset item
+      sourceTraceId:
+        type: nullable<string>
+        docs: The trace ID that sourced this dataset item
+      sourceObservationId:
+        type: nullable<string>
+        docs: The observation ID that sourced this dataset item
       datasetId: string
       datasetName: string
       createdAt: datetime
       updatedAt: datetime
+  # Source: web/src/features/public-api/types/datasets.ts - APIDatasetRunItem
   DatasetRunItem:
     properties:
       id: string
@@ -407,9 +465,12 @@ types:
       datasetRunName: string
       datasetItemId: string
       traceId: string
-      observationId: optional<string>
+      observationId:
+        type: nullable<string>
+        docs: The observation ID associated with this run item
       createdAt: datetime
       updatedAt: datetime
+  # Source: web/src/features/public-api/types/datasets.ts - APIDatasetRun
   DatasetRun:
     properties:
       id:
@@ -419,10 +480,10 @@ types:
         type: string
         docs: Name of the dataset run
       description:
-        type: optional<string>
+        type: nullable<string>
         docs: Description of the run
       metadata:
-        type: optional<unknown>
+        type: unknown
         docs: Metadata of the dataset run
       datasetId:
         type: string
@@ -440,8 +501,18 @@ types:
     extends: DatasetRun
     properties:
       datasetRunItems: list<DatasetRunItem>
+  # Source: web/src/features/public-api/types/models.ts - APIModelDefinition
   Model:
-    docs: Model definition used for transforming usage into USD cost and/or tokenization.
+    docs: |
+      Model definition used for transforming usage into USD cost and/or tokenization.
+
+      Models can have either simple flat pricing or tiered pricing:
+      - Flat pricing: Single price per usage type (legacy, but still supported)
+      - Tiered pricing: Multiple pricing tiers with conditional matching based on usage patterns
+
+      The pricing tiers approach is recommended for models with usage-based pricing variations.
+      When using tiered pricing, the flat price fields (inputPrice, outputPrice, prices) are populated
+      from the default tier for backward compatibility.
     properties:
       id: string
       modelName:
@@ -452,35 +523,231 @@ types:
         type: string
       startDate:
         docs: Apply only to generations which are newer than this ISO date.
-        type: optional<datetime>
+        type: nullable<datetime>
       unit:
         docs: Unit used by this model.
-        type: optional<ModelUsageUnit>
+        type: optional<nullable<ModelUsageUnit>>
       inputPrice:
         docs: Deprecated. See 'prices' instead. Price (USD) per input unit
-        type: optional<double>
+        type: nullable<double>
       outputPrice:
         docs: Deprecated. See 'prices' instead. Price (USD) per output unit
-        type: optional<double>
+        type: nullable<double>
       totalPrice:
         docs: Deprecated. See 'prices' instead. Price (USD) per total unit. Cannot be set if input or output price is set.
-        type: optional<double>
+        type: nullable<double>
       tokenizerId:
         docs: Optional. Tokenizer to be applied to observations which match to this model. See docs for more details.
-        type: optional<string>
+        type: nullable<string>
       tokenizerConfig:
         docs: Optional. Configuration for the selected tokenizer. Needs to be JSON. See docs for more details.
-        type: optional<unknown>
+        type: unknown
       isLangfuseManaged:
         type: boolean
+      createdAt:
+        docs: Timestamp when the model was created
+        type: datetime
       prices:
-        docs: Price (USD) by usage type
+        docs: |
+          Deprecated. Use 'pricingTiers' instead for models with usage-based pricing variations.
+
+          This field shows prices by usage type from the default pricing tier. Maintained for backward compatibility.
+          If the model uses tiered pricing, this field will be populated from the default tier's prices.
         type: map<string, ModelPrice>
+      pricingTiers:
+        docs: |
+          Array of pricing tiers with conditional pricing based on usage thresholds.
+
+          Pricing tiers enable accurate cost tracking for models that charge different rates based on usage patterns
+          (e.g., different rates for high-volume usage, large context windows, or cached tokens).
+
+          Each model must have exactly one default tier (isDefault=true, priority=0) that serves as a fallback.
+          Additional conditional tiers can be defined with specific matching criteria.
+
+          If this array is empty, the model uses legacy flat pricing from the inputPrice/outputPrice/totalPrice fields.
+        type: list<PricingTier>
 
   ModelPrice:
     properties:
       price: double
 
+  PricingTierCondition:
+    docs: |
+      Condition for matching a pricing tier based on usage details. Used to implement tiered pricing models where costs vary based on usage thresholds.
+
+      How it works:
+      1. The regex pattern matches against usage detail keys (e.g., "input_tokens", "input_cached")
+      2. Values of all matching keys are summed together
+      3. The sum is compared against the threshold value using the specified operator
+      4. All conditions in a tier must be met (AND logic) for the tier to match
+
+      Common use cases:
+      - Threshold-based pricing: Match when accumulated usage exceeds a certain amount
+      - Usage-type-specific pricing: Different rates for cached vs non-cached tokens, or input vs output
+      - Volume-based pricing: Different rates based on total request or token count
+    properties:
+      usageDetailPattern:
+        docs: |
+          Regex pattern to match against usage detail keys. All matching keys' values are summed for threshold comparison.
+
+          Examples:
+          - "^input" matches "input", "input_tokens", "input_cached", etc.
+          - "^(input|prompt)" matches both "input_tokens" and "prompt_tokens"
+          - "_cache$" matches "input_cache", "output_cache", etc.
+
+          The pattern is case-insensitive by default. If no keys match, the sum is treated as zero.
+        type: string
+      operator:
+        docs: |
+          Comparison operator to apply between the summed value and the threshold.
+
+          - gt: greater than (sum > threshold)
+          - gte: greater than or equal (sum >= threshold)
+          - lt: less than (sum < threshold)
+          - lte: less than or equal (sum <= threshold)
+          - eq: equal (sum == threshold)
+          - neq: not equal (sum != threshold)
+        type: PricingTierOperator
+      value:
+        docs: Threshold value for comparison. For token-based pricing, this is typically the token count threshold (e.g., 200000 for a 200K token threshold).
+        type: double
+      caseSensitive:
+        docs: Whether the regex pattern matching is case-sensitive. Default is false (case-insensitive matching).
+        type: boolean
+
+  PricingTier:
+    docs: |
+      Pricing tier definition with conditional pricing based on usage thresholds.
+
+      Pricing tiers enable accurate cost tracking for LLM providers that charge different rates based on usage patterns.
+      For example, some providers charge higher rates when context size exceeds certain thresholds.
+
+      How tier matching works:
+      1. Tiers are evaluated in ascending priority order (priority 1 before priority 2, etc.)
+      2. The first tier where ALL conditions match is selected
+      3. If no conditional tiers match, the default tier is used as a fallback
+      4. The default tier has priority 0 and no conditions
+
+      Why priorities matter:
+      - Lower priority numbers are evaluated first, allowing you to define specific cases before general ones
+      - Example: Priority 1 for "high usage" (>200K tokens), Priority 2 for "medium usage" (>100K tokens), Priority 0 for default
+      - Without proper ordering, a less specific condition might match before a more specific one
+
+      Every model must have exactly one default tier to ensure cost calculation always succeeds.
+    properties:
+      id:
+        docs: Unique identifier for the pricing tier
+        type: string
+      name:
+        docs: |
+          Name of the pricing tier for display and identification purposes.
+
+          Examples: "Standard", "High Volume Tier", "Large Context", "Extended Context Tier"
+        type: string
+      isDefault:
+        docs: |
+          Whether this is the default tier. Every model must have exactly one default tier with priority 0 and no conditions.
+
+          The default tier serves as a fallback when no conditional tiers match, ensuring cost calculation always succeeds.
+          It typically represents the base pricing for standard usage patterns.
+        type: boolean
+      priority:
+        docs: |
+          Priority for tier matching evaluation. Lower numbers = higher priority (evaluated first).
+
+          The default tier must always have priority 0. Conditional tiers should have priority 1, 2, 3, etc.
+
+          Example ordering:
+          - Priority 0: Default tier (no conditions, always matches as fallback)
+          - Priority 1: High usage tier (e.g., >200K tokens)
+          - Priority 2: Medium usage tier (e.g., >100K tokens)
+
+          This ensures more specific conditions are checked before general ones.
+        type: integer
+      conditions:
+        docs: |
+          Array of conditions that must ALL be met for this tier to match (AND logic).
+
+          The default tier must have an empty conditions array. Conditional tiers should have one or more conditions
+          that define when this tier's pricing applies.
+
+          Multiple conditions enable complex matching scenarios (e.g., "high input tokens AND low output tokens").
+        type: list<PricingTierCondition>
+      prices:
+        docs: |
+          Prices (USD) by usage type for this tier.
+
+          Common usage types: "input", "output", "total", "request", "image"
+          Prices are specified in USD per unit (e.g., per token, per request, per second).
+
+          Example: {"input": 0.000003, "output": 0.000015} means $3 per million input tokens and $15 per million output tokens.
+        type: map<string, double>
+
+  PricingTierInput:
+    docs: |
+      Input schema for creating a pricing tier. The tier ID will be automatically generated server-side.
+
+      When creating a model with pricing tiers:
+      - Exactly one tier must have isDefault=true (the fallback tier)
+      - The default tier must have priority=0 and conditions=[]
+      - All tier names and priorities must be unique within the model
+      - Each tier must define at least one price
+
+      See PricingTier for detailed information about how tiers work and why they're useful.
+    properties:
+      name:
+        docs: |
+          Name of the pricing tier for display and identification purposes.
+
+          Must be unique within the model. Common patterns: "Standard", "High Volume Tier", "Extended Context"
+        type: string
+      isDefault:
+        docs: |
+          Whether this is the default tier. Exactly one tier per model must be marked as default.
+
+          Requirements for default tier:
+          - Must have isDefault=true
+          - Must have priority=0
+          - Must have empty conditions array (conditions=[])
+
+          The default tier acts as a fallback when no conditional tiers match.
+        type: boolean
+      priority:
+        docs: |
+          Priority for tier matching evaluation. Lower numbers = higher priority (evaluated first).
+
+          Must be unique within the model. The default tier must have priority=0.
+          Conditional tiers should use priority 1, 2, 3, etc. based on their specificity.
+        type: integer
+      conditions:
+        docs: |
+          Array of conditions that must ALL be met for this tier to match (AND logic).
+
+          The default tier must have an empty array (conditions=[]).
+          Conditional tiers should define one or more conditions that specify when this tier's pricing applies.
+
+          Each condition specifies a regex pattern, operator, and threshold value for matching against usage details.
+        type: list<PricingTierCondition>
+      prices:
+        docs: |
+          Prices (USD) by usage type for this tier. At least one price must be defined.
+
+          Common usage types: "input", "output", "total", "request", "image"
+          Prices are in USD per unit (e.g., per token).
+
+          Example: {"input": 0.000003, "output": 0.000015} represents $3 per million input tokens and $15 per million output tokens.
+        type: map<string, double>
+
+  PricingTierOperator:
+    docs: Comparison operators for pricing tier conditions
+    enum:
+      - gt
+      - gte
+      - lt
+      - lte
+      - eq
+      - neq
+
   # Utilities
   ModelUsageUnit:
     docs: Unit of usage in Langfuse
@@ -519,11 +786,18 @@ types:
       - ANNOTATION
       - API
       - EVAL
+  ScoreConfigDataType:
+    enum:
+      - NUMERIC
+      - BOOLEAN
+      - CATEGORICAL
+
   ScoreDataType:
     enum:
       - NUMERIC
       - BOOLEAN
       - CATEGORICAL
+      - CORRECTION
 
 errors:
   Error:

fern/apis/server/definition/datasets.yml

@@ -76,6 +76,12 @@ types:
       name: string
       description: optional<string>
       metadata: optional<unknown>
+      inputSchema:
+        type: optional<unknown>
+        docs: JSON Schema for validating dataset item inputs. When set, all new and existing dataset items will be validated against this schema.
+      expectedOutputSchema:
+        type: optional<unknown>
+        docs: JSON Schema for validating dataset item expected outputs. When set, all new and existing dataset items will be validated against this schema.
   PaginatedDatasetRuns:
     properties:
       data: list<commons.DatasetRun>

fern/apis/server/definition/ingestion.yml

@@ -7,9 +7,13 @@ service:
   base-path: /api/public
   endpoints:
     batch:
+      availability:
+        status: deprecated
+        message: "Use the OpenTelemetry endpoint at /api/public/otel/v1/traces instead. Learn more: https://langfuse.com/integrations/native/opentelemetry"
       docs: |
-        Batched ingestion for Langfuse Tracing.
-        If you want to use tracing via the API, such as to build your own Langfuse client implementation, this is the only API route you need to implement.
+        **Legacy endpoint for batch ingestion for Langfuse Observability.**
+
+        -> Please use the OpenTelemetry endpoint (`/api/public/otel/v1/traces`). Learn more: https://langfuse.com/integrations/native/opentelemetry
 
         Within each batch, there can be multiple events.
         Each event has a type, an id, a timestamp, metadata and a body.
@@ -19,7 +23,7 @@ service:
         I.e. if you want to update a trace, you'd use the same body id, but separate event IDs.
 
         Notes:
-        - Introduction to data model: https://langfuse.com/docs/tracing-data-model
+        - Introduction to data model: https://langfuse.com/docs/observability/data-model
         - Batch sizes are limited to 3.5 MB in total. You need to adjust the number of events per batch accordingly.
         - The API does not return a 4xx status code for input errors. Instead, it responds with a 207 status code, which includes a list of the encountered errors.
       method: POST
@@ -145,6 +149,13 @@ types:
       - SPAN
       - GENERATION
       - EVENT
+      - AGENT
+      - TOOL
+      - CHAIN
+      - RETRIEVER
+      - EVALUATOR
+      - EMBEDDING
+      - GUARDRAIL
 
   IngestionUsage:
     discriminated: false
@@ -267,8 +278,13 @@ types:
       sessionId: optional<string>
       observationId: optional<string>
       datasetRunId: optional<string>
-      name: string
+      name:
+        type: string
+        docs: The name of the score. Always overrides "output" for correction scores.
       environment: optional<string>
+      queueId:
+        type: optional<string>
+        docs: The annotation queue referenced by the score. Indicates if score was initially created while processing annotation queue.
       value:
         type: commons.CreateScoreValue
         docs: The value of the score. Must be passed as string for categorical scores, and numeric for boolean and numeric scores. Boolean score values must equal either 1 or 0 (true or false)

fern/apis/server/definition/llm-connections.yml

@@ -0,0 +1,112 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/fern-api/fern/main/fern.schema.json
+imports:
+  commons: ./commons.yml
+  pagination: ./utils/pagination.yml
+service:
+  auth: true
+  base-path: /api/public
+  endpoints:
+    list:
+      method: GET
+      docs: Get all LLM connections in a project
+      path: /llm-connections
+      request:
+        name: GetLlmConnectionsRequest
+        query-parameters:
+          page:
+            type: optional<integer>
+            docs: page number, starts at 1
+          limit:
+            type: optional<integer>
+            docs: limit of items per page
+      response: PaginatedLlmConnections
+    upsert:
+      method: PUT
+      docs: Create or update an LLM connection. The connection is upserted on provider.
+      path: /llm-connections
+      request: UpsertLlmConnectionRequest
+      response: LlmConnection
+
+types:
+  LlmConnection:
+    docs: LLM API connection configuration (secrets excluded)
+    properties:
+      id: string
+      provider:
+        type: string
+        docs: Provider name (e.g., 'openai', 'my-gateway'). Must be unique in project, used for upserting.
+      adapter:
+        type: string
+        docs: The adapter used to interface with the LLM
+      displaySecretKey:
+        type: string
+        docs: Masked version of the secret key for display purposes
+      baseURL:
+        type: optional<string>
+        docs: Custom base URL for the LLM API
+      customModels:
+        type: list<string>
+        docs: List of custom model names available for this connection
+      withDefaultModels:
+        type: boolean
+        docs: Whether to include default models for this adapter
+      extraHeaderKeys:
+        type: list<string>
+        docs: Keys of extra headers sent with requests (values excluded for security)
+      config:
+        type: optional<map<string, unknown>>
+        docs: Adapter-specific configuration. Required for Bedrock (`{"region":"us-east-1"}`), optional for VertexAI (`{"location":"us-central1"}`), not used by other adapters.
+      createdAt: datetime
+      updatedAt: datetime
+
+  PaginatedLlmConnections:
+    properties:
+      data: list<LlmConnection>
+      meta: pagination.MetaResponse
+
+  UpsertLlmConnectionRequest:
+    docs: Request to create or update an LLM connection (upsert)
+    properties:
+      provider:
+        type: string
+        docs: Provider name (e.g., 'openai', 'my-gateway'). Must be unique in project, used for upserting.
+      adapter:
+        type: LlmAdapter
+        docs: The adapter used to interface with the LLM
+      secretKey:
+        type: string
+        docs: Secret key for the LLM API.
+      baseURL:
+        type: optional<string>
+        docs: Custom base URL for the LLM API
+      customModels:
+        type: optional<list<string>>
+        docs: List of custom model names
+      withDefaultModels:
+        type: optional<boolean>
+        docs: Whether to include default models. Default is true.
+      extraHeaders:
+        type: optional<map<string, string>>
+        docs: Extra headers to send with requests
+      config:
+        type: optional<map<string, unknown>>
+        docs: >
+          Adapter-specific configuration. Validation rules:
+          - **Bedrock**: Required. Must be `{"region": "<aws-region>"}` (e.g., `{"region":"us-east-1"}`)
+          - **VertexAI**: Optional. If provided, must be `{"location": "<gcp-location>"}` (e.g., `{"location":"us-central1"}`)
+          - **Other adapters**: Not supported. Omit this field or set to null.
+
+  LlmAdapter:
+    enum:
+      - value: anthropic
+        name: Anthropic
+      - value: openai
+        name: OpenAI
+      - value: azure
+        name: Azure
+      - value: bedrock
+        name: Bedrock
+      - value: google-vertex-ai
+        name: GoogleVertexAI
+      - value: google-ai-studio
+        name: GoogleAIStudio

fern/apis/server/definition/media.yml

@@ -116,6 +116,10 @@ types:
         name: IMAGE_TIFF
       - value: image/bmp
         name: IMAGE_BMP
+      - value: image/avif
+        name: IMAGE_AVIF
+      - value: image/heic
+        name: IMAGE_HEIC
       - value: audio/mpeg
         name: AUDIO_MPEG
       - value: audio/mp3
@@ -132,10 +136,24 @@ types:
         name: AUDIO_MP4
       - value: audio/flac
         name: AUDIO_FLAC
+      - value: audio/opus
+        name: AUDIO_OPUS
+      - value: audio/webm
+        name: AUDIO_WEBM
       - value: video/mp4
         name: VIDEO_MP4
       - value: video/webm
         name: VIDEO_WEBM
+      - value: video/ogg
+        name: VIDEO_OGG
+      - value: video/mpeg
+        name: VIDEO_MPEG
+      - value: video/quicktime
+        name: VIDEO_QUICKTIME
+      - value: video/x-msvideo
+        name: VIDEO_X_MSVIDEO
+      - value: video/x-matroska
+        name: VIDEO_X_MATROSKA
       - value: text/plain
         name: TEXT_PLAIN
       - value: text/html
@@ -144,12 +162,24 @@ types:
         name: TEXT_CSS
       - value: text/csv
         name: TEXT_CSV
+      - value: text/markdown
+        name: TEXT_MARKDOWN
+      - value: text/x-python
+        name: TEXT_X_PYTHON
+      - value: application/javascript
+        name: APPLICATION_JAVASCRIPT
+      - value: text/x-typescript
+        name: TEXT_X_TYPESCRIPT
+      - value: application/x-yaml
+        name: APPLICATION_X_YAML
       - value: application/pdf
         name: APPLICATION_PDF
       - value: application/msword
         name: APPLICATION_MSWORD
       - value: application/vnd.ms-excel
         name: APPLICATION_MS_EXCEL
+      - value: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
+        name: APPLICATION_OPENXML_SPREADSHEET
       - value: application/zip
         name: APPLICATION_ZIP
       - value: application/json
@@ -158,4 +188,20 @@ types:
         name: APPLICATION_XML
       - value: application/octet-stream
         name: APPLICATION_OCTET_STREAM
+      - value: application/vnd.openxmlformats-officedocument.wordprocessingml.document
+        name: APPLICATION_OPENXML_WORD
+      - value: application/vnd.openxmlformats-officedocument.presentationml.presentation
+        name: APPLICATION_OPENXML_PRESENTATION
+      - value: application/rtf
+        name: APPLICATION_RTF
+      - value: application/x-ndjson
+        name: APPLICATION_X_NDJSON
+      - value: application/vnd.apache.parquet
+        name: APPLICATION_PARQUET
+      - value: application/gzip
+        name: APPLICATION_GZIP
+      - value: application/x-tar
+        name: APPLICATION_X_TAR
+      - value: application/x-7z-compressed
+        name: APPLICATION_X_7Z_COMPRESSED
     docs: The MIME type of the media record

fern/apis/server/definition/metrics-v2.yml

@@ -0,0 +1,178 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/fern-api/fern/main/fern.schema.json
+imports:
+  pagination: ./utils/pagination.yml
+  commons: ./commons.yml
+service:
+  auth: true
+  base-path: /api/public
+  endpoints:
+    metrics:
+      docs: |
+        Get metrics from the Langfuse project using a query object. V2 endpoint with optimized performance.
+
+        ## V2 Differences
+        - Supports `observations`, `scores-numeric`, and `scores-categorical` views only (traces view not supported)
+        - Direct access to tags and release fields on observations
+        - Backwards-compatible: traceName, traceRelease, traceVersion dimensions are still available on observations view
+        - High cardinality dimensions are not supported and will return a 400 error (see below)
+
+        For more details, see the [Metrics API documentation](https://langfuse.com/docs/metrics/features/metrics-api).
+
+        ## Available Views
+
+        ### observations
+        Query observation-level data (spans, generations, events).
+
+        **Dimensions:**
+        - `environment` - Deployment environment (e.g., production, staging)
+        - `type` - Type of observation (SPAN, GENERATION, EVENT)
+        - `name` - Name of the observation
+        - `level` - Logging level of the observation
+        - `version` - Version of the observation
+        - `tags` - User-defined tags
+        - `release` - Release version
+        - `traceName` - Name of the parent trace (backwards-compatible)
+        - `traceRelease` - Release version of the parent trace (backwards-compatible, maps to release)
+        - `traceVersion` - Version of the parent trace (backwards-compatible, maps to version)
+        - `providedModelName` - Name of the model used
+        - `promptName` - Name of the prompt used
+        - `promptVersion` - Version of the prompt used
+        - `startTimeMonth` - Month of start_time in YYYY-MM format
+
+        **Measures:**
+        - `count` - Total number of observations
+        - `latency` - Observation latency (milliseconds)
+        - `streamingLatency` - Generation latency from completion start to end (milliseconds)
+        - `inputTokens` - Sum of input tokens consumed
+        - `outputTokens` - Sum of output tokens produced
+        - `totalTokens` - Sum of all tokens consumed
+        - `outputTokensPerSecond` - Output tokens per second
+        - `tokensPerSecond` - Total tokens per second
+        - `inputCost` - Input cost (USD)
+        - `outputCost` - Output cost (USD)
+        - `totalCost` - Total cost (USD)
+        - `timeToFirstToken` - Time to first token (milliseconds)
+        - `countScores` - Number of scores attached to the observation
+
+        ### scores-numeric
+        Query numeric and boolean score data.
+
+        **Dimensions:**
+        - `environment` - Deployment environment
+        - `name` - Name of the score (e.g., accuracy, toxicity)
+        - `source` - Origin of the score (API, ANNOTATION, EVAL)
+        - `dataType` - Data type (NUMERIC, BOOLEAN)
+        - `configId` - Identifier of the score config
+        - `timestampMonth` - Month in YYYY-MM format
+        - `timestampDay` - Day in YYYY-MM-DD format
+        - `value` - Numeric value of the score
+        - `traceName` - Name of the parent trace
+        - `tags` - Tags
+        - `traceRelease` - Release version
+        - `traceVersion` - Version
+        - `observationName` - Name of the associated observation
+        - `observationModelName` - Model name of the associated observation
+        - `observationPromptName` - Prompt name of the associated observation
+        - `observationPromptVersion` - Prompt version of the associated observation
+
+        **Measures:**
+        - `count` - Total number of scores
+        - `value` - Score value (for aggregations)
+
+        ### scores-categorical
+        Query categorical score data. Same dimensions as scores-numeric except uses `stringValue` instead of `value`.
+
+        **Measures:**
+        - `count` - Total number of scores
+
+        ## High Cardinality Dimensions
+        The following dimensions cannot be used as grouping dimensions in v2 metrics API as they can cause performance issues.
+        Use them in filters instead.
+
+        **observations view:**
+        - `id` - Use traceId filter to narrow down results
+        - `traceId` - Use traceId filter instead
+        - `userId` - Use userId filter instead
+        - `sessionId` - Use sessionId filter instead
+        - `parentObservationId` - Use parentObservationId filter instead
+
+        **scores-numeric / scores-categorical views:**
+        - `id` - Use specific filters to narrow down results
+        - `traceId` - Use traceId filter instead
+        - `userId` - Use userId filter instead
+        - `sessionId` - Use sessionId filter instead
+        - `observationId` - Use observationId filter instead
+
+        ## Aggregations
+        Available aggregation functions: `sum`, `avg`, `count`, `max`, `min`, `p50`, `p75`, `p90`, `p95`, `p99`, `histogram`
+
+        ## Time Granularities
+        Available granularities for timeDimension: `auto`, `minute`, `hour`, `day`, `week`, `month`
+        - `auto` bins the data into approximately 50 buckets based on the time range
+      method: GET
+      path: /v2/metrics
+      request:
+        name: GetMetricsV2Request
+        query-parameters:
+          query:
+            type: string
+            docs: |
+              JSON string containing the query parameters with the following structure:
+              ```json
+              {
+                "view": string,           // Required. One of "observations", "scores-numeric", "scores-categorical"
+                "dimensions": [           // Optional. Default: []
+                  {
+                    "field": string       // Field to group by (see available dimensions above)
+                  }
+                ],
+                "metrics": [              // Required. At least one metric must be provided
+                  {
+                    "measure": string,    // What to measure (see available measures above)
+                    "aggregation": string // How to aggregate: "sum", "avg", "count", "max", "min", "p50", "p75", "p90", "p95", "p99", "histogram"
+                  }
+                ],
+                "filters": [              // Optional. Default: []
+                  {
+                    "column": string,     // Column to filter on (any dimension field)
+                    "operator": string,   // Operator based on type:
+                                          // - datetime: ">", "<", ">=", "<="
+                                          // - string: "=", "contains", "does not contain", "starts with", "ends with"
+                                          // - stringOptions: "any of", "none of"
+                                          // - arrayOptions: "any of", "none of", "all of"
+                                          // - number: "=", ">", "<", ">=", "<="
+                                          // - stringObject/numberObject: same as string/number with required "key"
+                                          // - boolean: "=", "<>"
+                                          // - null: "is null", "is not null"
+                    "value": any,         // Value to compare against
+                    "type": string,       // Data type: "datetime", "string", "number", "stringOptions", "categoryOptions", "arrayOptions", "stringObject", "numberObject", "boolean", "null"
+                    "key": string         // Required only for stringObject/numberObject types (e.g., metadata filtering)
+                  }
+                ],
+                "timeDimension": {        // Optional. Default: null. If provided, results will be grouped by time
+                  "granularity": string   // One of "auto", "minute", "hour", "day", "week", "month"
+                },
+                "fromTimestamp": string,  // Required. ISO datetime string for start of time range
+                "toTimestamp": string,    // Required. ISO datetime string for end of time range (must be after fromTimestamp)
+                "orderBy": [              // Optional. Default: null
+                  {
+                    "field": string,      // Field to order by (dimension or metric alias)
+                    "direction": string   // "asc" or "desc"
+                  }
+                ],
+                "config": {               // Optional. Query-specific configuration
+                  "bins": number,         // Optional. Number of bins for histogram aggregation (1-100), default: 10
+                  "row_limit": number     // Optional. Maximum number of rows to return (1-1000), default: 100
+                }
+              }
+              ```
+      response: MetricsV2Response
+types:
+  MetricsV2Response:
+    properties:
+      data:
+        type: list<map<string, unknown>>
+        docs: |
+          The metrics data. Each item in the list contains the metric values and dimensions requested in the query.
+          Format varies based on the query parameters.
+          Histograms will return an array with [lower, upper, height] tuples.

fern/apis/server/definition/metrics.yml

@@ -7,7 +7,12 @@ service:
   base-path: /api/public
   endpoints:
     metrics:
-      docs: Get metrics from the Langfuse project using a query object
+      docs: |
+        Get metrics from the Langfuse project using a query object.
+
+        Consider using the [v2 metrics endpoint](/api-reference#tag/metricsv2/GET/api/public/v2/metrics) for better performance.
+
+        For more details, see the [Metrics API documentation](https://langfuse.com/docs/metrics/features/metrics-api).
       method: GET
       path: /metrics
       request:

fern/apis/server/definition/models.yml

@@ -60,14 +60,35 @@ types:
         docs: Unit used by this model.
         type: optional<commons.ModelUsageUnit>
       inputPrice:
-        docs: Price (USD) per input unit
+        docs: Deprecated. Use 'pricingTiers' instead. Price (USD) per input unit. Creates a default tier if pricingTiers not provided.
         type: optional<double>
       outputPrice:
-        docs: Price (USD) per output unit
+        docs: Deprecated. Use 'pricingTiers' instead. Price (USD) per output unit. Creates a default tier if pricingTiers not provided.
         type: optional<double>
       totalPrice:
-        docs: Price (USD) per total units. Cannot be set if input or output price is set.
+        docs: Deprecated. Use 'pricingTiers' instead. Price (USD) per total units. Cannot be set if input or output price is set. Creates a default tier if pricingTiers not provided.
         type: optional<double>
+      pricingTiers:
+        docs: |
+          Optional. Array of pricing tiers for this model.
+
+          Use pricing tiers for all models - both those with threshold-based pricing variations and those with simple flat pricing:
+
+          - For models with standard flat pricing: Create a single default tier with your prices
+            (e.g., one tier with isDefault=true, priority=0, conditions=[], and your standard prices)
+
+          - For models with threshold-based pricing: Create a default tier plus additional conditional tiers
+            (e.g., default tier for standard usage + high-volume tier for usage above certain thresholds)
+
+          Requirements:
+          - Cannot be provided with flat prices (inputPrice/outputPrice/totalPrice) - use one approach or the other
+          - Must include exactly one default tier with isDefault=true, priority=0, and conditions=[]
+          - All tier names and priorities must be unique within the model
+          - Each tier must define at least one price
+
+          If omitted, you must provide flat prices instead (inputPrice/outputPrice/totalPrice),
+          which will automatically create a single default tier named "Standard".
+        type: optional<list<commons.PricingTierInput>>
       tokenizerId:
         docs: Optional. Tokenizer to be applied to observations which match to this model. See docs for more details.
         type: optional<string>

fern/apis/server/definition/observations-v2.yml

@@ -0,0 +1,204 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/fern-api/fern/main/fern.schema.json
+imports:
+  commons: ./commons.yml
+service:
+  auth: true
+  base-path: /api/public
+  endpoints:
+    getMany:
+      docs: |
+        Get a list of observations with cursor-based pagination and flexible field selection.
+
+        ## Cursor-based Pagination
+        This endpoint uses cursor-based pagination for efficient traversal of large datasets.
+        The cursor is returned in the response metadata and should be passed in subsequent requests
+        to retrieve the next page of results.
+
+        ## Field Selection
+        Use the `fields` parameter to control which observation fields are returned:
+        - `core` - Always included: id, traceId, startTime, endTime, projectId, parentObservationId, type
+        - `basic` - name, level, statusMessage, version, environment, bookmarked, public, userId, sessionId
+        - `time` - completionStartTime, createdAt, updatedAt
+        - `io` - input, output
+        - `metadata` - metadata (truncated to 200 chars by default, use `expandMetadata` to get full values)
+        - `model` - providedModelName, internalModelId, modelParameters
+        - `usage` - usageDetails, costDetails, totalCost
+        - `prompt` - promptId, promptName, promptVersion
+        - `metrics` - latency, timeToFirstToken
+
+        If not specified, `core` and `basic` field groups are returned.
+
+        ## Filters
+        Multiple filtering options are available via query parameters or the structured `filter` parameter.
+        When using the `filter` parameter, it takes precedence over individual query parameter filters.
+      method: GET
+      path: /v2/observations
+      request:
+        name: GetObservationsV2Request
+        query-parameters:
+          fields:
+            type: optional<string>
+            docs: |
+              Comma-separated list of field groups to include in the response.
+              Available groups: core, basic, time, io, metadata, model, usage, prompt, metrics.
+              If not specified, `core` and `basic` field groups are returned.
+              Example: "basic,usage,model"
+          expandMetadata:
+            type: optional<string>
+            docs: |
+              Comma-separated list of metadata keys to return non-truncated.
+              By default, metadata values over 200 characters are truncated.
+              Use this parameter to retrieve full values for specific keys.
+              Example: "key1,key2"
+          limit:
+            type: optional<integer>
+            docs: Number of items to return per page. Maximum 1000, default 50.
+          cursor:
+            type: optional<string>
+            docs: Base64-encoded cursor for pagination. Use the cursor from the previous response to get the next page.
+          parseIoAsJson:
+            type: optional<boolean>
+            docs: |
+              Set to `true` to parse input/output fields as JSON, or `false` to return raw strings.
+              Defaults to `false` if not provided.
+          name: optional<string>
+          userId: optional<string>
+          type:
+            type: optional<string>
+            docs: Filter by observation type (e.g., "GENERATION", "SPAN", "EVENT", "AGENT", "TOOL", "CHAIN", "RETRIEVER", "EVALUATOR", "EMBEDDING", "GUARDRAIL")
+          traceId: optional<string>
+          level:
+            type: optional<commons.ObservationLevel>
+            docs: Optional filter for observations with a specific level (e.g. "DEBUG", "DEFAULT", "WARNING", "ERROR").
+          parentObservationId: optional<string>
+          environment:
+            type: optional<string>
+            allow-multiple: true
+            docs: Optional filter for observations where the environment is one of the provided values.
+          fromStartTime:
+            type: optional<datetime>
+            docs: Retrieve only observations with a start_time on or after this datetime (ISO 8601).
+          toStartTime:
+            type: optional<datetime>
+            docs: Retrieve only observations with a start_time before this datetime (ISO 8601).
+          version:
+            type: optional<string>
+            docs: Optional filter to only include observations with a certain version.
+          filter:
+            type: optional<string>
+            docs: |
+              JSON string containing an array of filter conditions. When provided, this takes precedence over query parameter filters (userId, name, type, level, environment, fromStartTime, ...).
+
+              ## Filter Structure
+              Each filter condition has the following structure:
+              ```json
+              [
+                {
+                  "type": string,           // Required. One of: "datetime", "string", "number", "stringOptions", "categoryOptions", "arrayOptions", "stringObject", "numberObject", "boolean", "null"
+                  "column": string,         // Required. Column to filter on (see available columns below)
+                  "operator": string,       // Required. Operator based on type:
+                                            // - datetime: ">", "<", ">=", "<="
+                                            // - string: "=", "contains", "does not contain", "starts with", "ends with"
+                                            // - stringOptions: "any of", "none of"
+                                            // - categoryOptions: "any of", "none of"
+                                            // - arrayOptions: "any of", "none of", "all of"
+                                            // - number: "=", ">", "<", ">=", "<="
+                                            // - stringObject: "=", "contains", "does not contain", "starts with", "ends with"
+                                            // - numberObject: "=", ">", "<", ">=", "<="
+                                            // - boolean: "=", "<>"
+                                            // - null: "is null", "is not null"
+                  "value": any,             // Required (except for null type). Value to compare against. Type depends on filter type
+                  "key": string             // Required only for stringObject, numberObject, and categoryOptions types when filtering on nested fields like metadata
+                }
+              ]
+              ```
+
+              ## Available Columns
+
+              ### Core Observation Fields
+              - `id` (string) - Observation ID
+              - `type` (string) - Observation type (SPAN, GENERATION, EVENT)
+              - `name` (string) - Observation name
+              - `traceId` (string) - Associated trace ID
+              - `startTime` (datetime) - Observation start time
+              - `endTime` (datetime) - Observation end time
+              - `environment` (string) - Environment tag
+              - `level` (string) - Log level (DEBUG, DEFAULT, WARNING, ERROR)
+              - `statusMessage` (string) - Status message
+              - `version` (string) - Version tag
+              - `userId` (string) - User ID
+              - `sessionId` (string) - Session ID
+
+              ### Trace-Related Fields
+              - `traceName` (string) - Name of the parent trace
+              - `traceTags` (arrayOptions) - Tags from the parent trace
+              - `tags` (arrayOptions) - Alias for traceTags
+
+              ### Performance Metrics
+              - `latency` (number) - Latency in seconds (calculated: end_time - start_time)
+              - `timeToFirstToken` (number) - Time to first token in seconds
+              - `tokensPerSecond` (number) - Output tokens per second
+
+              ### Token Usage
+              - `inputTokens` (number) - Number of input tokens
+              - `outputTokens` (number) - Number of output tokens
+              - `totalTokens` (number) - Total tokens (alias: `tokens`)
+
+              ### Cost Metrics
+              - `inputCost` (number) - Input cost in USD
+              - `outputCost` (number) - Output cost in USD
+              - `totalCost` (number) - Total cost in USD
+
+              ### Model Information
+              - `model` (string) - Provided model name (alias: `providedModelName`)
+              - `promptName` (string) - Associated prompt name
+              - `promptVersion` (number) - Associated prompt version
+
+              ### Structured Data
+              - `metadata` (stringObject/numberObject/categoryOptions) - Metadata key-value pairs. Use `key` parameter to filter on specific metadata keys.
+
+              ## Filter Examples
+              ```json
+              [
+                {
+                  "type": "string",
+                  "column": "type",
+                  "operator": "=",
+                  "value": "GENERATION"
+                },
+                {
+                  "type": "number",
+                  "column": "latency",
+                  "operator": ">=",
+                  "value": 2.5
+                },
+                {
+                  "type": "stringObject",
+                  "column": "metadata",
+                  "key": "environment",
+                  "operator": "=",
+                  "value": "production"
+                }
+              ]
+              ```
+      response: ObservationsV2Response
+
+types:
+  ObservationsV2Response:
+    docs: |
+      Response containing observations with field-group-based filtering and cursor-based pagination.
+
+      The `data` array contains observation objects with only the requested field groups included.
+      Use the `cursor` in `meta` to retrieve the next page of results.
+    properties:
+      data:
+        type: list<map<string, unknown>>
+        docs: Array of observation objects. Fields included depend on the `fields` parameter in the request.
+      meta: ObservationsV2Meta
+
+  ObservationsV2Meta:
+    docs: Metadata for cursor-based pagination
+    properties:
+      cursor:
+        type: optional<string>
+        docs: Base64-encoded cursor to use for retrieving the next page. If not present, there are no more results.

fern/apis/server/definition/observations.yml

@@ -16,7 +16,10 @@ service:
           docs: The unique langfuse identifier of an observation, can be an event, span or generation
       response: commons.ObservationsView
     getMany:
-      docs: Get a list of observations
+      docs: |
+        Get a list of observations.
+
+        Consider using the [v2 observations endpoint](/api-reference#tag/observationsv2/GET/api/public/v2/observations) for cursor-based pagination and field selection.
       method: GET
       path: /observations
       request:
@@ -49,6 +52,102 @@ service:
           version:
             type: optional<string>
             docs: Optional filter to only include observations with a certain version.
+          filter:
+            type: optional<string>
+            docs: |
+              JSON string containing an array of filter conditions. When provided, this takes precedence over query parameter filters (userId, name, type, level, environment, fromStartTime, ...).
+
+              ## Filter Structure
+              Each filter condition has the following structure:
+              ```json
+              [
+                {
+                  "type": string,           // Required. One of: "datetime", "string", "number", "stringOptions", "categoryOptions", "arrayOptions", "stringObject", "numberObject", "boolean", "null"
+                  "column": string,         // Required. Column to filter on (see available columns below)
+                  "operator": string,       // Required. Operator based on type:
+                                            // - datetime: ">", "<", ">=", "<="
+                                            // - string: "=", "contains", "does not contain", "starts with", "ends with"
+                                            // - stringOptions: "any of", "none of"
+                                            // - categoryOptions: "any of", "none of"
+                                            // - arrayOptions: "any of", "none of", "all of"
+                                            // - number: "=", ">", "<", ">=", "<="
+                                            // - stringObject: "=", "contains", "does not contain", "starts with", "ends with"
+                                            // - numberObject: "=", ">", "<", ">=", "<="
+                                            // - boolean: "=", "<>"
+                                            // - null: "is null", "is not null"
+                  "value": any,             // Required (except for null type). Value to compare against. Type depends on filter type
+                  "key": string             // Required only for stringObject, numberObject, and categoryOptions types when filtering on nested fields like metadata
+                }
+              ]
+              ```
+
+              ## Available Columns
+
+              ### Core Observation Fields
+              - `id` (string) - Observation ID
+              - `type` (string) - Observation type (SPAN, GENERATION, EVENT)
+              - `name` (string) - Observation name
+              - `traceId` (string) - Associated trace ID
+              - `startTime` (datetime) - Observation start time
+              - `endTime` (datetime) - Observation end time
+              - `environment` (string) - Environment tag
+              - `level` (string) - Log level (DEBUG, DEFAULT, WARNING, ERROR)
+              - `statusMessage` (string) - Status message
+              - `version` (string) - Version tag
+
+              ### Performance Metrics
+              - `latency` (number) - Latency in seconds (calculated: end_time - start_time)
+              - `timeToFirstToken` (number) - Time to first token in seconds
+              - `tokensPerSecond` (number) - Output tokens per second
+
+              ### Token Usage
+              - `inputTokens` (number) - Number of input tokens
+              - `outputTokens` (number) - Number of output tokens
+              - `totalTokens` (number) - Total tokens (alias: `tokens`)
+
+              ### Cost Metrics
+              - `inputCost` (number) - Input cost in USD
+              - `outputCost` (number) - Output cost in USD
+              - `totalCost` (number) - Total cost in USD
+
+              ### Model Information
+              - `model` (string) - Provided model name
+              - `promptName` (string) - Associated prompt name
+              - `promptVersion` (number) - Associated prompt version
+
+              ### Structured Data
+              - `metadata` (stringObject/numberObject/categoryOptions) - Metadata key-value pairs. Use `key` parameter to filter on specific metadata keys.
+
+              ### Associated Trace Fields (requires join with traces table)
+              - `userId` (string) - User ID from associated trace
+              - `traceName` (string) - Name from associated trace
+              - `traceEnvironment` (string) - Environment from associated trace
+              - `traceTags` (arrayOptions) - Tags from associated trace
+
+              ## Filter Examples
+              ```json
+              [
+                {
+                  "type": "string",
+                  "column": "type",
+                  "operator": "=",
+                  "value": "GENERATION"
+                },
+                {
+                  "type": "number",
+                  "column": "latency",
+                  "operator": ">=",
+                  "value": 2.5
+                },
+                {
+                  "type": "stringObject",
+                  "column": "metadata",
+                  "key": "environment",
+                  "operator": "=",
+                  "value": "production"
+                }
+              ]
+              ```
       response: ObservationsViews
 
 types:

fern/apis/server/definition/opentelemetry.yml

@@ -0,0 +1,167 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/fern-api/fern/main/fern.schema.json
+service:
+  auth: true
+  base-path: /api/public
+  endpoints:
+    exportTraces:
+      docs: |
+        **OpenTelemetry Traces Ingestion Endpoint**
+
+        This endpoint implements the OTLP/HTTP specification for trace ingestion, providing native OpenTelemetry integration for Langfuse Observability.
+
+        **Supported Formats:**
+        - Binary Protobuf: `Content-Type: application/x-protobuf`
+        - JSON Protobuf: `Content-Type: application/json`
+        - Supports gzip compression via `Content-Encoding: gzip` header
+
+        **Specification Compliance:**
+        - Conforms to [OTLP/HTTP Trace Export](https://opentelemetry.io/docs/specs/otlp/#otlphttp)
+        - Implements `ExportTraceServiceRequest` message format
+
+        **Documentation:**
+        - Integration guide: https://langfuse.com/integrations/native/opentelemetry
+        - Data model: https://langfuse.com/docs/observability/data-model
+      method: POST
+      path: /otel/v1/traces
+      request:
+        name: OtelTraceRequest
+        body:
+          properties:
+            resourceSpans:
+              type: list<OtelResourceSpan>
+              docs: Array of resource spans containing trace data as defined in the OTLP specification
+        content-type: application/json
+      response: OtelTraceResponse
+      examples:
+        - name: BasicTraceExport
+          docs: Example JSON payload for exporting a simple trace with one span
+          request:
+            resourceSpans:
+              - resource:
+                  attributes:
+                    - key: service.name
+                      value:
+                        stringValue: "my-service"
+                    - key: service.version
+                      value:
+                        stringValue: "1.0.0"
+                scopeSpans:
+                  - scope:
+                      name: "langfuse-sdk"
+                      version: "2.60.3"
+                    spans:
+                      - traceId: "0123456789abcdef0123456789abcdef"
+                        spanId: "0123456789abcdef"
+                        name: "my-operation"
+                        kind: 1
+                        startTimeUnixNano: "1747872000000000000"
+                        endTimeUnixNano: "1747872001000000000"
+                        attributes:
+                          - key: "langfuse.observation.type"
+                            value:
+                              stringValue: "generation"
+                        status: {}
+          response:
+            body: {}
+
+types:
+  OtelResourceSpan:
+    docs: Represents a collection of spans from a single resource as per OTLP specification
+    properties:
+      resource:
+        type: optional<OtelResource>
+        docs: Resource information
+      scopeSpans:
+        type: optional<list<OtelScopeSpan>>
+        docs: Array of scope spans
+
+  OtelResource:
+    docs: Resource attributes identifying the source of telemetry
+    properties:
+      attributes:
+        type: optional<list<OtelAttribute>>
+        docs: Resource attributes like service.name, service.version, etc.
+
+  OtelScopeSpan:
+    docs: Collection of spans from a single instrumentation scope
+    properties:
+      scope:
+        type: optional<OtelScope>
+        docs: Instrumentation scope information
+      spans:
+        type: optional<list<OtelSpan>>
+        docs: Array of spans
+
+  OtelScope:
+    docs: Instrumentation scope information
+    properties:
+      name:
+        type: optional<string>
+        docs: Instrumentation scope name
+      version:
+        type: optional<string>
+        docs: Instrumentation scope version
+      attributes:
+        type: optional<list<OtelAttribute>>
+        docs: Additional scope attributes
+
+  OtelSpan:
+    docs: Individual span representing a unit of work or operation
+    properties:
+      traceId:
+        type: optional<unknown>
+        docs: Trace ID (16 bytes, hex-encoded string in JSON or Buffer in binary)
+      spanId:
+        type: optional<unknown>
+        docs: Span ID (8 bytes, hex-encoded string in JSON or Buffer in binary)
+      parentSpanId:
+        type: optional<unknown>
+        docs: Parent span ID if this is a child span
+      name:
+        type: optional<string>
+        docs: Span name describing the operation
+      kind:
+        type: optional<integer>
+        docs: Span kind (1=INTERNAL, 2=SERVER, 3=CLIENT, 4=PRODUCER, 5=CONSUMER)
+      startTimeUnixNano:
+        type: optional<unknown>
+        docs: Start time in nanoseconds since Unix epoch
+      endTimeUnixNano:
+        type: optional<unknown>
+        docs: End time in nanoseconds since Unix epoch
+      attributes:
+        type: optional<list<OtelAttribute>>
+        docs: Span attributes including Langfuse-specific attributes (langfuse.observation.*)
+      status:
+        type: optional<unknown>
+        docs: Span status object
+
+  OtelAttribute:
+    docs: Key-value attribute pair for resources, scopes, or spans
+    properties:
+      key:
+        type: optional<string>
+        docs: Attribute key (e.g., "service.name", "langfuse.observation.type")
+      value:
+        type: optional<OtelAttributeValue>
+        docs: Attribute value
+
+  OtelAttributeValue:
+    docs: Attribute value wrapper supporting different value types
+    properties:
+      stringValue:
+        type: optional<string>
+        docs: String value
+      intValue:
+        type: optional<integer>
+        docs: Integer value
+      doubleValue:
+        type: optional<double>
+        docs: Double value
+      boolValue:
+        type: optional<boolean>
+        docs: Boolean value
+
+  OtelTraceResponse:
+    docs: Response from trace export request. Empty object indicates success.
+    properties: {}

fern/apis/server/definition/organizations.yml

@@ -20,6 +20,13 @@ service:
       request: MembershipRequest
       response: MembershipResponse
 
+    deleteOrganizationMembership:
+      docs: Delete a membership from the organization associated with the API key (requires organization-scoped API key)
+      method: DELETE
+      path: /organizations/memberships
+      request: DeleteMembershipRequest
+      response: MembershipDeletionResponse
+
     getProjectMemberships:
       docs: Get all memberships for a specific project (requires organization-scoped API key)
       method: GET
@@ -37,12 +44,27 @@ service:
       request: MembershipRequest
       response: MembershipResponse
 
+    deleteProjectMembership:
+      docs: Delete a membership from a specific project (requires organization-scoped API key). The user must be a member of the organization.
+      method: DELETE
+      path: /projects/{projectId}/memberships
+      path-parameters:
+        projectId: string
+      request: DeleteMembershipRequest
+      response: MembershipDeletionResponse
+
     getOrganizationProjects:
       docs: Get all projects for the organization associated with the API key (requires organization-scoped API key)
       method: GET
       path: /organizations/projects
       response: OrganizationProjectsResponse
 
+    getOrganizationApiKeys:
+      docs: Get all API keys for the organization associated with the API key (requires organization-scoped API key)
+      method: GET
+      path: /organizations/apiKeys
+      response: OrganizationApiKeysResponse
+
 types:
   MembershipRole:
     enum:
@@ -56,6 +78,10 @@ types:
       userId: string
       role: MembershipRole
 
+  DeleteMembershipRequest:
+    properties:
+      userId: string
+
   MembershipResponse:
     properties:
       userId: string
@@ -63,6 +89,11 @@ types:
       email: string
       name: string
 
+  MembershipDeletionResponse:
+    properties:
+      message: string
+      userId: string
+
   MembershipsResponse:
     properties:
       memberships: list<MembershipResponse>
@@ -77,4 +108,18 @@ types:
 
   OrganizationProjectsResponse:
     properties:
-      projects: list<OrganizationProject>
+      projects: list<OrganizationProject>
+
+  OrganizationApiKey:
+    properties:
+      id: string
+      createdAt: datetime
+      expiresAt: optional<datetime>
+      lastUsedAt: optional<datetime>
+      note: optional<string>
+      publicKey: string
+      displaySecretKey: string
+
+  OrganizationApiKeysResponse:
+    properties:
+      apiKeys: list<OrganizationApiKey>

fern/apis/server/definition/projects.yml

@@ -7,7 +7,7 @@ service:
   base-path: /api/public
   endpoints:
     get:
-      docs: Get Project associated with API key
+      docs: Get Project associated with API key (requires project-scoped API key). You can use GET /api/public/organizations/projects to get all projects with an organization-scoped key.
       method: GET
       path: /projects
       response: Projects
@@ -44,8 +44,12 @@ service:
               type: optional<map<string, unknown>>
               docs: Optional metadata for the project
             retention:
-              type: integer
-              docs: Number of days to retain data. Must be 0 or at least 3 days. Requires data-retention entitlement for non-zero values. Optional.
+              type: optional<integer>
+              docs: |
+                Number of days to retain data.
+                Must be 0 or at least 3 days.
+                Requires data-retention entitlement for non-zero values.
+                Optional. Will retain existing retention setting if omitted.
       response: Project
 
     delete:
@@ -80,6 +84,12 @@ service:
             note:
               type: optional<string>
               docs: Optional note for the API key
+            publicKey:
+              type: optional<string>
+              docs: Optional predefined public key. Must start with 'pk-lf-'. If provided, secretKey must also be provided.
+            secretKey:
+              type: optional<string>
+              docs: Optional predefined secret key. Must start with 'sk-lf-'. If provided, publicKey must also be provided.
       response: ApiKeyResponse
 
     deleteApiKey:
@@ -96,10 +106,22 @@ types:
     properties:
       data: list<Project>
 
+  Organization:
+    properties:
+      id:
+        type: string
+        docs: The unique identifier of the organization
+      name:
+        type: string
+        docs: The name of the organization
+
   Project:
     properties:
       id: string
       name: string
+      organization:
+        type: Organization
+        docs: The organization this project belongs to
       metadata:
         type: map<string, unknown>
         docs: Metadata for the project

fern/apis/server/definition/prompt-version.yml

@@ -13,7 +13,9 @@ service:
       path-parameters:
         name:
           type: string
-          docs: The name of the prompt
+          docs: |
+            The name of the prompt. If the prompt is in a folder (e.g., "folder/subfolder/prompt-name"), 
+            the folder path must be URL encoded.
         version:
           type: integer
           docs: Version of the prompt to update

fern/apis/server/definition/prompts.yml

@@ -2,6 +2,7 @@
 imports:
   commons: ./commons.yml
   pagination: ./utils/pagination.yml
+  scim: ./scim.yml
 service:
   auth: true
   base-path: /api/public/v2
@@ -13,7 +14,9 @@ service:
       path-parameters:
         promptName:
           type: string
-          docs: The name of the prompt
+          docs: |
+            The name of the prompt. If the prompt is in a folder (e.g., "folder/subfolder/prompt-name"), 
+            the folder path must be URL encoded.
       request:
         name: GetPromptRequest
         query-parameters:
@@ -57,6 +60,24 @@ service:
       request: CreatePromptRequest
       response: Prompt
 
+    delete:
+      docs: Delete prompt versions. If neither version nor label is specified, all versions of the prompt are deleted.
+      method: DELETE
+      path: /prompts/{promptName}
+      path-parameters:
+        promptName:
+          type: string
+          docs: The name of the prompt
+      request:
+        name: DeletePromptRequest
+        query-parameters:
+          label:
+            type: optional<string>
+            docs: Optional label to filter deletion. If specified, deletes all prompt versions that have this label.
+          version:
+            type: optional<integer>
+            docs: Optional version to filter deletion. If specified, deletes only this specific version of the prompt.
+
 types:
   PromptMetaListResponse:
     properties:
@@ -66,6 +87,9 @@ types:
   PromptMeta:
     properties:
       name: string
+      type:
+        type: PromptType
+        docs: Indicates whether the prompt is a text or chat prompt.
       versions: list<integer>
       labels: list<string>
       tags: list<string>
@@ -114,6 +138,11 @@ types:
       chat: ChatPrompt
       text: TextPrompt
 
+  PromptType:
+    enum:
+      - chat
+      - text
+
   BasePrompt:
     properties:
       name: string

fern/apis/server/definition/score-configs.yml

@@ -35,6 +35,18 @@ service:
           type: string
           docs: The unique langfuse identifier of a score config
       response: commons.ScoreConfig
+
+    update:
+      docs: Update a score config
+      method: PATCH
+      path: /score-configs/{configId}
+      path-parameters:
+        configId:
+          type: string
+          docs: The unique langfuse identifier of a score config
+      request: UpdateScoreConfigRequest
+      response: commons.ScoreConfig
+
 types:
   ScoreConfigs:
     properties:
@@ -43,7 +55,27 @@ types:
   CreateScoreConfigRequest:
     properties:
       name: string
-      dataType: commons.ScoreDataType
+      dataType: commons.ScoreConfigDataType
+      categories:
+        type: optional<list<commons.ConfigCategory>>
+        docs: Configure custom categories for categorical scores. Pass a list of objects with `label` and `value` properties. Categories are autogenerated for boolean configs and cannot be passed
+      minValue:
+        type: optional<double>
+        docs: Configure a minimum value for numerical scores. If not set, the minimum value defaults to -∞
+      maxValue:
+        type: optional<double>
+        docs: Configure a maximum value for numerical scores. If not set, the maximum value defaults to +∞
+      description:
+        type: optional<string>
+        docs: Description is shown across the Langfuse UI and can be used to e.g. explain the config categories in detail, why a numeric range was set, or provide additional context on config name or usage
+  UpdateScoreConfigRequest:
+    properties:
+      isArchived:
+        type: optional<boolean>
+        docs: The status of the score config showing if it is archived or not
+      name:
+        type: optional<string>
+        docs: The name of the score config
       categories:
         type: optional<list<commons.ConfigCategory>>
         docs: Configure custom categories for categorical scores. Pass a list of objects with `label` and `value` properties. Categories are autogenerated for boolean configs and cannot be passed

fern/apis/server/definition/score-v2.yml

@@ -50,6 +50,15 @@ service:
           configId:
             type: optional<string>
             docs: Retrieve only scores with a specific configId.
+          sessionId:
+            type: optional<string>
+            docs: Retrieve only scores with a specific sessionId.
+          datasetRunId:
+            type: optional<string>
+            docs: Retrieve only scores with a specific datasetRunId.
+          traceId:
+            type: optional<string>
+            docs: Retrieve only scores with a specific traceId.
           queueId:
             type: optional<string>
             docs: Retrieve only scores with a specific annotation queueId.
@@ -60,6 +69,9 @@ service:
             type: optional<string>
             allow-multiple: true
             docs: Only scores linked to traces that include all of these tags will be returned.
+          fields:
+            type: optional<string>
+            docs: "Comma-separated list of field groups to include in the response. Available field groups: 'score' (core score fields), 'trace' (trace properties: userId, tags, environment). If not specified, both 'score' and 'trace' are returned by default. Example: 'score' to exclude trace data, 'score,trace' to include both. Note: When filtering by trace properties (using userId or traceTags parameters), the 'trace' field group must be included, otherwise a 400 error will be returned."
       response: GetScoresResponse
     get-by-id:
       docs: Get a score (supports both trace and session scores)

fern/apis/server/definition/score.yml

@@ -33,10 +33,13 @@ types:
         type: commons.CreateScoreValue
         docs: The value of the score. Must be passed as string for categorical scores, and numeric for boolean and numeric scores. Boolean score values must equal either 1 or 0 (true or false)
       comment: optional<string>
-      metadata: optional<unknown>
+      metadata: optional<map<string, unknown>>
       environment:
         type: optional<string>
         docs: The environment of the score. Can be any lowercase alphanumeric string with hyphens and underscores that does not start with 'langfuse'.
+      queueId:
+        type: optional<string>
+        docs: The annotation queue referenced by the score. Indicates if score was initially created while processing annotation queue.
       dataType:
         type: optional<commons.ScoreDataType>
         docs: The data type of the score. When passing a configId this field is inferred. Otherwise, this field must be passed or will default to numeric.

fern/apis/server/definition/trace.yml

@@ -65,7 +65,115 @@ service:
             docs: Optional filter for traces where the environment is one of the provided values.
           fields:
             type: optional<string>
-            docs: "Comma-separated list of fields to include in the response. Available field groups are 'core' (always included), 'io' (input, output, metadata), 'scores', 'observations', 'metrics'. If not provided, all fields are included. Example: 'core,scores,metrics'"
+            docs: "Comma-separated list of fields to include in the response. Available field groups: 'core' (always included), 'io' (input, output, metadata), 'scores', 'observations', 'metrics'. If not specified, all fields are returned. Example: 'core,scores,metrics'. Note: Excluded 'observations' or 'scores' fields return empty arrays; excluded 'metrics' returns -1 for 'totalCost' and 'latency'."
+          filter:
+            type: optional<string>
+            docs: |
+              JSON string containing an array of filter conditions. When provided, this takes precedence over query parameter filters (userId, name, sessionId, tags, version, release, environment, fromTimestamp, toTimestamp).
+
+              ## Filter Structure
+              Each filter condition has the following structure:
+              ```json
+              [
+                {
+                  "type": string,           // Required. One of: "datetime", "string", "number", "stringOptions", "categoryOptions", "arrayOptions", "stringObject", "numberObject", "boolean", "null"
+                  "column": string,         // Required. Column to filter on (see available columns below)
+                  "operator": string,       // Required. Operator based on type:
+                                            // - datetime: ">", "<", ">=", "<="
+                                            // - string: "=", "contains", "does not contain", "starts with", "ends with"
+                                            // - stringOptions: "any of", "none of"
+                                            // - categoryOptions: "any of", "none of"
+                                            // - arrayOptions: "any of", "none of", "all of"
+                                            // - number: "=", ">", "<", ">=", "<="
+                                            // - stringObject: "=", "contains", "does not contain", "starts with", "ends with"
+                                            // - numberObject: "=", ">", "<", ">=", "<="
+                                            // - boolean: "=", "<>"
+                                            // - null: "is null", "is not null"
+                  "value": any,             // Required (except for null type). Value to compare against. Type depends on filter type
+                  "key": string             // Required only for stringObject, numberObject, and categoryOptions types when filtering on nested fields like metadata
+                }
+              ]
+              ```
+
+              ## Available Columns
+
+              ### Core Trace Fields
+              - `id` (string) - Trace ID
+              - `name` (string) - Trace name
+              - `timestamp` (datetime) - Trace timestamp
+              - `userId` (string) - User ID
+              - `sessionId` (string) - Session ID
+              - `environment` (string) - Environment tag
+              - `version` (string) - Version tag
+              - `release` (string) - Release tag
+              - `tags` (arrayOptions) - Array of tags
+              - `bookmarked` (boolean) - Bookmark status
+
+              ### Structured Data
+              - `metadata` (stringObject/numberObject/categoryOptions) - Metadata key-value pairs. Use `key` parameter to filter on specific metadata keys.
+
+              ### Aggregated Metrics (from observations)
+              These metrics are aggregated from all observations within the trace:
+              - `latency` (number) - Latency in seconds (time from first observation start to last observation end)
+              - `inputTokens` (number) - Total input tokens across all observations
+              - `outputTokens` (number) - Total output tokens across all observations
+              - `totalTokens` (number) - Total tokens (alias: `tokens`)
+              - `inputCost` (number) - Total input cost in USD
+              - `outputCost` (number) - Total output cost in USD
+              - `totalCost` (number) - Total cost in USD
+
+              ### Observation Level Aggregations
+              These fields aggregate observation levels within the trace:
+              - `level` (string) - Highest severity level (ERROR > WARNING > DEFAULT > DEBUG)
+              - `warningCount` (number) - Count of WARNING level observations
+              - `errorCount` (number) - Count of ERROR level observations
+              - `defaultCount` (number) - Count of DEFAULT level observations
+              - `debugCount` (number) - Count of DEBUG level observations
+
+              ### Scores (requires join with scores table)
+              - `scores_avg` (number) - Average of numeric scores (alias: `scores`)
+              - `score_categories` (categoryOptions) - Categorical score values
+
+              ## Filter Examples
+              ```json
+              [
+                {
+                  "type": "datetime",
+                  "column": "timestamp",
+                  "operator": ">=",
+                  "value": "2024-01-01T00:00:00Z"
+                },
+                {
+                  "type": "string",
+                  "column": "userId",
+                  "operator": "=",
+                  "value": "user-123"
+                },
+                {
+                  "type": "number",
+                  "column": "totalCost",
+                  "operator": ">=",
+                  "value": 0.01
+                },
+                {
+                  "type": "arrayOptions",
+                  "column": "tags",
+                  "operator": "all of",
+                  "value": ["production", "critical"]
+                },
+                {
+                  "type": "stringObject",
+                  "column": "metadata",
+                  "key": "customer_tier",
+                  "operator": "=",
+                  "value": "enterprise"
+                }
+              ]
+              ```
+
+              ## Performance Notes
+              - Filtering on `userId`, `sessionId`, or `metadata` may enable skip indexes for better query performance
+              - Score filters require a join with the scores table and may impact query performance
       response: Traces
     deleteMultiple:
       docs: Delete multiple traces

fern/apis/server/generators.yml

@@ -1,3 +1,4 @@
+# yaml-language-server: $schema=https://schema.buildwithfern.dev/generators-yml.json
 default-group: local
 groups:
   local:
@@ -7,6 +8,7 @@ groups:
         output:
           location: local-file-system
           path: ../../../web/public/generated/api
+
       - name: fernapi/fern-python-sdk
         version: 2.16.0
         output:
@@ -19,35 +21,32 @@ groups:
           pydantic_config:
             require_optional_fields: false
             use_str_enums: false
-#      - name: fernapi/fern-java-sdk
-#        version: 2.20.1
-#        output:
-#          location: local-file-system
-#          path: ../../../../langfuse-java/src/main/java/com/langfuse/client/
-#        config:
-#          client-class-name: LangfuseClient
+
+      # - name: fernapi/fern-java-sdk
+      #   version: 2.20.1
+      #   output:
+      #     location: local-file-system
+      #     path: ../../../../langfuse-java/src/main/java/com/langfuse/client/
+      #   config:
+      #     client-class-name: LangfuseClient
+
+      - name: fernapi/fern-typescript-node-sdk
+        version: 2.12.3
+        output:
+          location: local-file-system
+          path: ../../../generated/typescript
+        config:
+          namespaceExport: LangfuseAPI
+          outputSourceFiles: true
+          skipResponseValidation: true
+          fetchSupport: native
+          formDataSupport: Node18
+          fileResponseType: binary-response
+          streamType: web
+          omitFernHeaders: true
+
       - name: fernapi/fern-postman
         version: 0.0.45
         output:
           location: local-file-system
           path: ../../../web/public/generated/postman
-  # published:
-  #   generators:
-  #     - name: fernapi/fern-python-sdk
-  #       version: 0.3.7
-  #       output:
-  #         location: pypi
-  #         url: pypi.buildwithfern.com
-  #         package-name: finto-fern-langfuse
-  #       config:
-  #         namespaceExport: Langfuse
-  #         allowCustomFetcher: true
-  #     - name: fernapi/fern-typescript-node-sdk
-  #       version: 0.7.1
-  #       output:
-  #         location: npm
-  #         url: npm.buildwithfern.com
-  #         package-name: "@finto-fern/langfuse-node"
-  #       config:
-  #         namespaceExport: Langfuse
-  #         allowCustomFetcher: true

fern/fern.config.json

@@ -1,4 +1,4 @@
 {
   "organization": "langfuse",
-  "version": "0.56.0"
-}
+  "version": "0.77.5"
+}

generated/.gitignore

@@ -1 +0,0 @@
-python/

package.json

@@ -1,11 +1,11 @@
 {
   "name": "langfuse",
-  "version": "3.88.0",
+  "version": "3.150.0",
   "author": "engineering@langfuse.com",
   "license": "MIT",
   "private": true,
   "engines": {
-    "node": "20"
+    "node": "24"
   },
   "scripts": {
     "preinstall": "npx only-allow pnpm",
@@ -21,11 +21,14 @@
     "dx-f": "pnpm i && pnpm run infra:dev:prune && pnpm run infra:dev:up --pull always && pnpm --filter=shared run db:reset:test && pnpm --filter=shared run db:reset -f && SKIP_CONFIRM=1 pnpm --filter=shared run ch:reset && pnpm --filter=shared run db:seed:examples && pnpm run dev",
     "dx:skip-infra": "pnpm i && pnpm --filter=shared run db:reset:test && pnpm --filter=shared run db:reset && pnpm --filter=shared run ch:reset && pnpm --filter=shared run db:seed:examples && pnpm run dev",
     "build": "turbo run build",
+    "build:check": "turbo run build:check",
+    "typecheck": "turbo run typecheck",
+    "tc": "turbo run typecheck",
     "start": "turbo run start",
     "dev": "turbo run dev",
     "dev:worker": "turbo run dev --filter=worker",
-    "dev:web": "turbo run dev --filter=web",
-    "dev:web-turbo": "turbo run dev --filter=web -- --turbo",
+    "dev:web": "turbo run dev --filter=web -- --turbo",
+    "dev:web-no-turbo": "turbo run dev --filter=web",
     "lint": "turbo run lint",
     "format": "prettier --write \"**/*.{js,jsx,ts,tsx,css}\" --experimental-cli",
     "format:check": "prettier --check \"**/*.{js,jsx,ts,tsx,css}\" --experimental-cli",
@@ -36,11 +39,11 @@
   "devDependencies": {
     "@release-it/bumper": "^7.0.5",
     "braces": "3.0.3",
-    "dotenv-cli": "^7.4.2",
-    "husky": "^9.0.11",
+    "dotenv-cli": "^7.4.4",
+    "husky": "^9.1.7",
     "prettier": "^3.6.2",
-    "release-it": "^19.0.3",
-    "turbo": "^2.5.5"
+    "release-it": "^19.0.4",
+    "turbo": "^2.7.5"
   },
   "release-it": {
     "git": {
@@ -91,10 +94,13 @@
       "nanoid": "^3.3.8",
       "katex": "^0.16.21",
       "tar-fs": "^2.1.2",
-      "rollup@^4.0.0": "^4.22.4"
+      "rollup@^4.0.0": "^4.22.4",
+      "@types/node-fetch": "^2.6.13",
+      "glob": "^10.5.0",
+      "qs": "6.14.1"
     },
     "patchedDependencies": {
-      "next-auth@4.24.11": "patches/next-auth@4.24.11.patch"
+      "next-auth@4.24.13": "patches/next-auth@4.24.13.patch"
     }
   }
 }

packages/config-eslint/base.js

@@ -0,0 +1,87 @@
+import js from "@eslint/js";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+import turboConfig from "eslint-config-turbo/flat";
+import eslintPluginPrettierRecommended from "eslint-plugin-prettier/recommended";
+import "eslint-plugin-only-warn";
+
+export default tseslint.config(
+  // Global ignores
+  {
+    name: "langfuse/ignores",
+    ignores: [
+      "**/node_modules/",
+      "**/dist/",
+      "**/build/",
+      "**/coverage/",
+      "**/.next/",
+      "**/.*",
+      "eslint.config.mjs",
+    ],
+  },
+
+  // Base JS rules (same as eslint v8 library.js)
+  js.configs.recommended,
+
+  // Turbo monorepo rules
+  ...turboConfig,
+
+  // Prettier (last for rule precedence)
+  eslintPluginPrettierRecommended,
+
+  // Global settings
+  {
+    name: "langfuse/base/globals",
+    languageOptions: {
+      ecmaVersion: 2022,
+      sourceType: "module",
+      globals: {
+        ...globals.node,
+        ...globals.es2021,
+        React: "readonly",
+        JSX: "readonly",
+      },
+    },
+    rules: {
+      "no-redeclare": "off",
+      "import/order": "off",
+    },
+  },
+
+  // TypeScript-specific - parser only + custom rules
+  // Note: Old library.js had no TS rules, only eslint:recommended
+  // Adding parser + plugin to support custom rules, but not extending recommended
+  {
+    name: "langfuse/base/typescript",
+    files: ["**/*.ts", "**/*.tsx", "**/*.mts", "**/*.cts"],
+    plugins: {
+      "@typescript-eslint": tseslint.plugin,
+    },
+    languageOptions: {
+      parser: tseslint.parser,
+    },
+    rules: {
+      "no-undef": "off", // TypeScript handles this
+      "no-dupe-class-members": "off", // TypeScript handles this (and supports overloads)
+      "no-unused-vars": "off", // Use @typescript-eslint/no-unused-vars instead
+      "no-restricted-globals": [
+        "error",
+        {
+          name: "redis",
+          message: "Import redis explicitly from '@langfuse/shared/src/server'",
+        },
+      ],
+      // Custom rule from eslint v8 shared/.eslintrc.js
+      "@typescript-eslint/no-unused-vars": [
+        "warn",
+        {
+          argsIgnorePattern: "^_",
+          varsIgnorePattern: "^_",
+          caughtErrorsIgnorePattern: "^_",
+          destructuredArrayIgnorePattern: "^_",
+          ignoreRestSiblings: true,
+        },
+      ],
+    },
+  },
+);

packages/config-eslint/index.js

@@ -0,0 +1,2 @@
+// @ts-check
+export { default } from "./base.js";