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Miguel ÁngelandGitHub
b736de8819
## What Move the id-less media fix into the shared timing compiler so producer can resolve durations for sub-composition videos before inlining, then carry the merged result through engine parsing, regression coverage, and the regression Docker image used in CI. This PR now does five concrete things: - assigns stable ids to id-less media in core `compileTimingAttrs()` so unresolved duration injection can target them - keeps the engine-side `parseVideoElements()` support for `video[src]` plus the newer `data-duration` / natural-duration fallback from `main` - makes producer prefer sub-composition media metadata over the later inlined-document parse when the same media id appears in both places - makes `sub-composition-video` a runnable regression test by fixing its metadata and checking in the missing `output/compiled.html` snapshot - removes the stale `pnpm-workspace.yaml` copy step from `Dockerfile.test`, so regression CI builds the Bun-based test image from the current workspace layout ## Why - media without an explicit `id` could not participate in unresolved-duration resolution early enough - producer could lose the resolved sub-composition timing by overwriting it with the later inlined parse - the regression fixture intended to cover this case was not actually running in CI because its `meta.json` was incomplete and the required compiled snapshot was missing - the regression image definition still expected a deleted `pnpm-workspace.yaml`, so GitHub Actions failed before the test shard could start Putting the id-generation step in core makes the behavior reusable instead of relying on producer-only HTML patching. ## How ### Shared compiler - core `compileTimingAttrs()` now auto-assigns stable ids to id-less `video` / `audio` tags - those generated ids are returned in `unresolved`, so `injectDurations()` can add `data-duration` and `data-end` to the same media element later in the pipeline - added core tests that cover auto-id assignment and duration injection for generated ids ### Producer - when producer combines `subVideos` / `subAudios` with the media re-parsed from the final inlined HTML, it now lets the sub-composition metadata win - this preserves the resolved/clamped timing already computed for nested media instead of overwriting it with the later parse - `sub-composition-video` now has valid regression metadata and a checked-in `output/compiled.html` snapshot so CI actually executes it ### Engine - resolved the merge conflict in `videoFrameExtractor` by keeping the broader `video[src]` parsing from this branch and the `data-duration` / natural-duration fallback that landed on `main` - added a focused engine unit test for videos without ids ### CI image - `Dockerfile.test` now copies only `package.json` and `bun.lock` at the workspace root before `bun install --frozen-lockfile` - this matches the current monorepo layout and removes the obsolete pnpm-era dependency on `pnpm-workspace.yaml` ## Test plan - [x] `bun run --filter @hyperframes/core test` - [x] `bun run --filter @hyperframes/engine test` - [x] `bun run --filter @hyperframes/producer test --update --sequential sub-composition-video` - [x] `bun run --filter @hyperframes/producer test --sequential sub-composition-video` - [x] Browser check with `agent-browser` against the compiled fixture page (`http://127.0.0.1:8123/compiled.html`) - [x] Clean tracked-only Docker build of `Dockerfile.test` with the PR version of the file applied ## Notes - Latest regression workflow is green on `main`, but before this PR the `sub-composition-video` fixture was being skipped by the harness rather than exercised end to end. - The CI Docker fix was validated from a tracked-only export to avoid local untracked worktree artifacts affecting the result.
Hyperframes
Write HTML. Render video. Built for agents.
Hyperframes is an open-source video rendering framework that lets you create, preview, and render HTML-based video compositions — with first-class support for AI agents via MCP.
Why Hyperframes?
- HTML-native — AI agents already speak HTML. No React required.
- Frame Adapter pattern — bring your own animation runtime (GSAP, Lottie, CSS, Three.js).
- Deterministic rendering — same input = identical output. Built for automated pipelines.
- AI-first design — not a bolted-on afterthought.
Quick Start
npx hyperframes init my-video
cd my-video
Then open the project with your AI coding agent (Claude Code, Cursor, etc.) — it has HyperFrames skills installed and knows how to create and edit compositions.
npx hyperframes preview # preview in browser (live reload)
npx hyperframes render # render to MP4
Requirements: Node.js >= 22, FFmpeg
Documentation
Full documentation at hyperframes.heygen.com — start with the Quickstart, then explore guides, concepts, API reference, and package docs.
How It Works
Define your video as HTML with data attributes:
<div id="stage" data-composition-id="my-video" data-start="0" data-width="1920" data-height="1080">
<video
id="clip-1"
data-start="0"
data-duration="5"
data-track="0"
src="intro.mp4"
muted
playsinline
></video>
<img id="overlay" data-start="2" data-duration="3" data-track="1" src="logo.png" />
<audio
id="bg-music"
data-start="0"
data-duration="9"
data-track="2"
data-volume="0.5"
src="music.wav"
></audio>
</div>
Preview instantly in the browser. Render to MP4 locally. Let AI agents compose videos using tools they already understand.
Packages
| Package | Description |
|---|---|
hyperframes |
CLI — create, preview, lint, and render compositions |
@hyperframes/core |
Types, parsers, generators, linter, runtime, frame adapters |
@hyperframes/engine |
Seekable page-to-video capture engine (Puppeteer + FFmpeg) |
@hyperframes/producer |
Full rendering pipeline (capture + encode + audio mix) |
@hyperframes/studio |
Browser-based composition editor UI |
AI Agent Skills
HyperFrames ships skills that teach AI coding agents (Claude Code, Gemini CLI, Codex, Cursor) how to write correct compositions and GSAP animations. Use these instead of writing from scratch — they encode framework-specific patterns that generic docs don't cover.
Install via CLI (recommended)
# Install all skills (HyperFrames + GSAP) — runs automatically during `hyperframes init`
npx hyperframes skills
# Or install to a specific agent
npx hyperframes skills --claude
npx hyperframes skills --cursor
Or via npx skills add
# HyperFrames skills (hyperframes-compose, hyperframes-captions)
npx skills add heygen-com/hyperframes
# GSAP skills (gsap-core, gsap-timeline, gsap-scrolltrigger, gsap-plugins, gsap-performance, gsap-utils, gsap-react, gsap-frameworks)
npx skills add greensock/gsap-skills
Installed Skills
| Source | Skills | What they teach |
|---|---|---|
| HyperFrames | hyperframes-compose, hyperframes-captions |
HTML composition structure, class="clip" rules, data-* attributes, timeline registration, rendering constraints |
| GSAP | gsap-core, gsap-timeline, gsap-performance, gsap-plugins, gsap-scrolltrigger, gsap-utils, gsap-react, gsap-frameworks |
Core API, timeline sequencing, ScrollTrigger, plugin usage, performance best practices |
In Claude Code, invoke with /hyperframes-compose, /hyperframes-captions, /gsap-core, etc.
Contributing
See CONTRIBUTING.md for guidelines on how to contribute.
License
See LICENSE for details.