fix: ruff lint errors across hanzo-tools-* packages (I001, F401, F541)

Fix 21 auto-fixable errors: import sorting (I001), unused import (F401),
and empty f-strings (F541) in 13 files across tool packages.

pkg/hanzo-tools-agent/hanzo_tools/agent/__init__.py

@@ -22,11 +22,11 @@ import logging
 logger = logging.getLogger(__name__)
 
 # Core tools
+from .zen_tool import ZenTool
 from .agent_tool import AgentTool
 
 # Legacy imports for backwards compatibility
 from .critic_tool import CriticTool  # Legacy - use reasoning.critic instead
-from .zen_tool import ZenTool
 from .review_tool import ReviewTool
 from .grok_cli_tool import GrokCLITool
 from .cli_agent_base import CLIAgentBase

pkg/hanzo-tools-api/hanzo_tools/api/__init__.py

@@ -36,7 +36,6 @@ MCP Tool Usage:
 # Models (structured data types)
 # MCP Tool
 from .api_tool import APITool
-from .hanzo_tool import HanzoTool
 
 # Main client (typed interface)
 from .client import (
@@ -64,6 +63,7 @@ from .errors import (
     SpecNotLoadedError,
     ValidationError,
 )
+from .hanzo_tool import HanzoTool
 from .models import (
     APICallResult,
     AuthType,

pkg/hanzo-tools-api/hanzo_tools/api/hanzo_tool.py

@@ -10,7 +10,7 @@ from __future__ import annotations
 import importlib
 import inspect
 import json
-from typing import Any, Annotated, final, override
+from typing import Annotated, Any, final, override
 
 from mcp.server import FastMCP
 from mcp.server.fastmcp import Context as MCPContext

pkg/hanzo-tools-api/tests/test_api_tools.py

@@ -13,9 +13,9 @@ from hanzo_tools.api import (
     PROVIDER_CONFIGS,
     APIClient,
     APITool,
-    HanzoTool,
     Credential,
     CredentialManager,
+    HanzoTool,
     OpenAPIClient,
     SpecCache,
 )

pkg/hanzo-tools-browser/hanzo_tools/browser/__init__.py

@@ -22,12 +22,12 @@ from hanzo_tools.browser.browser_tool import (
     PLAYWRIGHT_AVAILABLE,
     BrowserPool,
     BrowserTool,
-    browser_tool,
-    create_browser_tool,
     get_backend,
-    launch_browser_server,
     _load_config,
     _save_config,
+    browser_tool,
+    create_browser_tool,
+    launch_browser_server,
 )
 
 logger = logging.getLogger(__name__)

pkg/hanzo-tools-browser/hanzo_tools/browser/browser_tool.py

@@ -677,7 +677,7 @@ class BrowserTool(BaseTool):
         # and be preferred over Playwright when backend != "playwright".
         if self.backend != "playwright":
             try:
-                from hanzo_tools.browser import start_cdp_bridge, CDP_BRIDGE_AVAILABLE
+                from hanzo_tools.browser import CDP_BRIDGE_AVAILABLE, start_cdp_bridge
                 if CDP_BRIDGE_AVAILABLE:
                     start_cdp_bridge()
             except Exception:
@@ -848,7 +848,7 @@ CATEGORIES:
             "observe_mutations", "computed_styles", "bounding_rects",
             "inject_script", "inject_css",
             "local_storage", "cookies",
-            "tabs", "new_tab", "close_tab", "select_tab",
+            "tabs", "new_tab", "select_tab",
             "console", "network_requests", "status",
             # Takeover actions (Phase 3)
             "takeover", "release",

pkg/hanzo-tools-browser/hanzo_tools/browser/cdp_bridge_server.py

@@ -31,8 +31,8 @@ import time
 import uuid
 import asyncio
 import logging
-from pathlib import Path
 from typing import Any, Callable, Optional
+from pathlib import Path
 from dataclasses import field, dataclass
 
 try:

pkg/hanzo-tools-computer/hanzo_tools/computer/__init__.py

@@ -37,15 +37,15 @@ Screen Limits (configurable via env vars):
 
 from hanzo_tools.core import BaseTool, ToolRegistry, PermissionManager
 
-# HIP-0300: Single unified 'computer' tool
-from .computer_tool import ComputerTool
+# Backward compat
+from .ui_tool import UiTool, ui_tool
 
 # Internal utilities (used by screen_tool)
 from .media_tool import MediaLimits, MediaResult, ActivitySegment, media_tool
 from .screen_tool import ScreenTool, ScreenConfig, screen_tool
 
-# Backward compat
-from .ui_tool import UiTool, ui_tool
+# HIP-0300: Single unified 'computer' tool
+from .computer_tool import ComputerTool
 
 # Export list for tool discovery - single computer tool (HIP-0300)
 TOOLS = [ComputerTool]

pkg/hanzo-tools-config/hanzo_tools/config/workspace_tool.py

@@ -6,12 +6,12 @@ Actions: detect, capabilities, help, schema
 
 from __future__ import annotations
 
-import asyncio
-import json
 import os
+import json
 import shutil
-from pathlib import Path
+import asyncio
 from typing import Any, ClassVar
+from pathlib import Path
 
 from mcp.server.fastmcp import Context as MCPContext
 

pkg/hanzo-tools-shell/hanzo_tools/shell/__init__.py

@@ -76,11 +76,11 @@ from hanzo_tools.shell.uvx_tool import UvxTool, uvx_tool
 # HTTP/Data tools (no shell escaping issues)
 from hanzo_tools.shell.curl_tool import CurlTool
 
-# Convenience tools
-from hanzo_tools.shell.open_tool import OpenTool, open_tool
-
 # HIP-0300: Unified exec tool
 from hanzo_tools.shell.exec_tool import ExecTool, exec_tool
+
+# Convenience tools
+from hanzo_tools.shell.open_tool import OpenTool, open_tool
 from hanzo_tools.shell.shellflow import (
     parse as parse_shellflow,
     compile as compile_shellflow,

pkg/hanzo-tools-ui/hanzo_tools/ui/__init__.py

@@ -26,12 +26,12 @@ Usage:
 
 from hanzo_tools.core import BaseTool, ToolRegistry
 
-from .ui_tool import UiTool, ui_tool
 from .github_api import (
     FRAMEWORK_CONFIGS,
     FRAMEWORK_NAMES,
     GitHubAPIClient,
 )
+from .ui_tool import UiTool, ui_tool
 
 TOOLS = [UiTool]
 

pkg/hanzo-tools-ui/hanzo_tools/ui/ui_tool.py

@@ -19,7 +19,7 @@ Actions:
 """
 
 import asyncio
-from typing import Any, ClassVar
+from typing import ClassVar
 
 from mcp.server.fastmcp import Context as MCPContext
 
@@ -321,12 +321,12 @@ Frameworks: hanzo (default), hanzo-native, hanzo-vue, hanzo-svelte,
             fw = framework or _current_framework
             comps = components or []
 
-            lines = [f"/**", f" * {name}"]
+            lines = ["/**", f" * {name}"]
             if description:
                 lines.append(f" * {description}")
             lines.append(f" * Framework: {self._fw_name(fw)}")
             lines.append(f" * Components: {', '.join(comps)}")
-            lines.append(f" */")
+            lines.append(" */")
             lines.append("")
 
             def pascal(s: str) -> str:
@@ -341,13 +341,13 @@ Frameworks: hanzo (default), hanzo-native, hanzo-vue, hanzo-svelte,
 
             lines.append("")
             lines.append(f"export function {name}() {{")
-            lines.append(f"  return (")
-            lines.append(f'    <div className="container mx-auto p-6">')
+            lines.append("  return (")
+            lines.append('    <div className="container mx-auto p-6">')
             for comp in comps:
                 lines.append(f"      <{pascal(comp)} />")
-            lines.append(f"    </div>")
-            lines.append(f"  )")
-            lines.append(f"}}")
+            lines.append("    </div>")
+            lines.append("  )")
+            lines.append("}")
 
             code = "\n".join(lines) + "\n"
 

pkg/hanzo-tools/hanzo_tools/core/__init__.py

@@ -14,22 +14,22 @@ from hanzo_tools.core.base import (
 )
 from hanzo_tools.core.types import MCPResourceDocument
 from hanzo_tools.core.context import ToolContext, create_tool_context
-from hanzo_tools.core.decorators import auto_timeout
-from hanzo_tools.core.validation import ValidationResult, validate_path_parameter
-from hanzo_tools.core.permissions import PermissionManager
 from hanzo_tools.core.unified import (
+    Range,
+    Paging,
     BaseTool,  # Unified HIP-0300 base class
-    ActionHandler,
     ErrorCode,
     ToolError,
+    ActionHandler,
     ConflictError,
     NotFoundError,
     InvalidParamsError,
-    Paging,
-    Range,
-    content_hash,
     file_uri,
+    content_hash,
 )
+from hanzo_tools.core.decorators import auto_timeout
+from hanzo_tools.core.validation import ValidationResult, validate_path_parameter
+from hanzo_tools.core.permissions import PermissionManager
 
 __all__ = [
     # Base classes