hyperframes/CLAUDE.md

Hyperframes

Open-source video rendering framework: write HTML, render video.

Skills

This repo ships 19 AI agent skills via vercel-labs/skills. Install them before writing compositions — they encode framework-specific patterns that generic docs don't cover.

npx skills add heygen-com/hyperframes                        # interactive picker
npx skills add heygen-com/hyperframes --all                  # install all 19 (skips picker)
npx skills add heygen-com/hyperframes --skill <name>         # just one (bare name, no leading slash)

/hyperframes is the entry skill — read it first. It's the capability map for the domain skills below AND the intent router for the creation workflows. The full README skills section mirrors this list; keep them in sync (see "Skill catalog maintenance" below).

Creation workflows

• /product-launch-video — a product URL (or a pre-written script / text brief in no-capture mode) → product launch / promo video, up to ~3 min (sweet spot ~30-90s).
• /website-to-video — a general website / URL → a video of the site (tour / showcase / social clip from captured screenshots + assets); for a product launch / promo, use /product-launch-video.
• /faceless-explainer — arbitrary text, no URL and no website capture → faceless explainer, up to ~3 min (sweet spot ~30-90s); every visual is LLM-invented (typography / abstract graphics / diagram / data-viz).
• /pr-to-video — a GitHub PR (URL / owner/repo#N / "this PR") → code-change explainer, up to ~3 min (changelog / feature reveal / fix / refactor). A PR link, not a product website.
• /embedded-captions — an existing talking-head video (MP4) → the same footage with captions / subtitles added (verbatim rail + embedded climax, or pure-cinematic embed); the footage itself is untouched (no NLE-style editing).
• /talking-head-recut — an existing talking-head / interview / podcast video (MP4) → the same footage packaged with designed graphic overlays (kinetic titles, lower-thirds, data callouts, pull-quotes, side panels, PiP) synced to the transcript; the clip plays unchanged underneath, footage untouched. For plain captions/subtitles → /embedded-captions.
• /motion-graphics — a short (typically under 10s) design-led motion graphic, motion-is-the-message, no narration: kinetic type, a stat / number count-up, a chart, a logo sting, a lower-third / overlay, or an animated tweet / headline / captured-page highlight; rendered to MP4 or a transparent overlay. Longer / narrated / custom → /general-video.
• /music-to-video — a music track (audio file, or video to pull audio from) → beat-synced video (lyric / slideshow / kinetic promo). Music drives pacing; user-supplied images / videos are cut onto the same beat grid.
• /slideshow — a presentation / pitch deck / interactive deck — discrete slides, fragment reveals, branching, hotspot navigation, presenter mode. Output is a navigable deck, not a rendered video.
• /general-video — fallback for any other video creation (title card, longer brand / sizzle reel, multi-scene montage, static loop, custom composition); the original hyperframes flow — design → plan → layout → build → validate, any length.
• /remotion-to-hyperframes — port an existing Remotion (React) composition to HyperFrames HTML. One-way migration, not creation.

Domain skills (loaded on demand)

Atomic capabilities the creation workflows compose against — pull one when you need that specific layer:

• /hyperframes-core — the composition contract: data-* timing attributes, class="clip", tracks, sub-compositions, variables, framework-owned media playback, determinism rules. Read before writing composition HTML.
• /hyperframes-animation — all animation knowledge: atomic motion rules, scene blueprints, transitions, runtime adapters (GSAP default, plus Lottie / Three.js / Anime.js / CSS / WAAPI / TypeGPU).
• /hyperframes-creative — non-animation creative direction: frame.md / design.md handling, palettes, typography, narration, beat planning, audio-reactive visuals, composition patterns.
• /hyperframes-media — audio + media: TTS voiceover, background music, sound effects, Whisper transcription, background removal, caption authoring (one shared scripts/audio.mjs engine, multi-provider).
• /media-use — resolve any media need (BGM, SFX, image, icon) into a frozen local file + ledger record. One verb (resolve) over the HeyGen catalog with manifest tracking; keeps search noise on disk.
• /hyperframes-cli — CLI dev loop: init, add, lint, validate, inspect, preview, render, publish, doctor, lambda (AWS Lambda cloud rendering).
• /hyperframes-registry — install and wire registry blocks and components into compositions via hyperframes add. Covers authoring a new block or component to contribute upstream.

Skill catalog maintenance

When adding a new skill, or substantially renaming / repurposing an existing one, update all three agent-facing discoverability surfaces in lockstep:

1. The skill list above (CLAUDE.md) AND the ## Skills section in README.md AND docs/guides/skills.mdx (rendered at hyperframes.heygen.com/guides/skills). Out-of-date entries silently kill discovery.
2. If the skill changes the routing surface for "make a video" requests, also update the capability map and intent router in skills/hyperframes/SKILL.md — that's the canonical router agents read first.
3. Mirror the Router / Creation workflows / Domain skills grouping across all three surfaces so a skill always lives in the same column.
4. Skill count appears in the README and CLAUDE.md intro lines ("19 AI agent skills…") — update on add/remove. The docs/guides/skills.mdx page deliberately omits a count to avoid drift; keep it count-free.

The skill's own SKILL.md frontmatter description: is the source of truth for the one-line "use when" blurb; copy from there into the catalog rather than paraphrasing.

Build & Test

bun install     # Install dependencies (NOT pnpm — do not create pnpm-lock.yaml)
bun run build   # Build all packages
bun run test    # Run all tests

Linting & Formatting

Uses oxlint and oxfmt (not eslint, not prettier, not biome).

bunx oxlint <files>        # Lint
bunx oxfmt <files>         # Format
bunx oxfmt --check <files> # Check formatting (CI / pre-commit)

Always lint and format changed files before committing. Lefthook pre-commit hooks enforce this automatically.

Composition Validation

After creating or editing any .html composition:

npx hyperframes lint       # Static HTML structure check
npx hyperframes validate   # Runtime check (headless Chrome — catches JS errors, missing assets)

Both must pass before previewing or considering work complete.

Project Structure

packages/
  cli/                  → hyperframes CLI (create, preview, lint, render)
  core/                 → Types, parsers, generators, linter, runtime, frame adapters
  engine/               → Seekable page-to-video capture engine (Puppeteer + FFmpeg)
  player/               → Embeddable <hyperframes-player> web component
  producer/             → Full rendering pipeline (capture + encode + audio mix)
  shader-transitions/   → WebGL shader transitions for compositions
  studio/               → Browser-based composition editor UI
registry/
  blocks/               → Installable sub-composition scenes (50+)
  components/           → Installable effects and snippets
  examples/             → Starter project templates
docs/                   → Mintlify documentation site (hyperframes.heygen.com)
skills/                 → AI agent skill definitions

Key Conventions

• Package manager: bun (not pnpm, not npm for workspace operations)
• Commit format: Conventional commits (feat:, fix:, docs:, refactor:, test:)
• TypeScript: Avoid any and as T assertions. Prefer type guards and narrowing.
• Compositions: HTML files with data-* attributes. Clips need class="clip". GSAP timelines must be paused and registered on window.__timelines.
• Frame Adapters: Animation runtimes plug in via the seek-by-frame adapter pattern. GSAP is the primary adapter.
• Deterministic rendering: No Date.now(), no unseeded Math.random(), no render-time network fetches.

Documentation

• Docs: https://hyperframes.heygen.com/introduction
• Catalog (50+ blocks): https://hyperframes.heygen.com/catalog/blocks/data-chart