HyperFrames Core

Agent pitfalls (read first):

• Center with flex/inset, not CSS transform: translate(-50%,-50%) on a node you then GSAP x/y. Lint: gsap_css_transform_conflict. Use fromTo or xPercent/yPercent.
• Do not add a scene-exit tl.set(..., {visibility:"hidden"}). The runtime already hides timed clips. Opacity fades on inner nodes (or opacity on .clip) are enough. Caption hard-kills are a different rule.
• window.__timelines["id"] must match the root data-composition-id.
• After render, read the summary's second line: beginframe vs screenshot, GPU mode, stage timings. screenshot + software gpu on Linux is the slow path.

HyperFrames renders video from HTML. A composition is an HTML file whose DOM declares timing with data-* attributes, whose animation runtime is seekable, and whose media playback is owned by the framework.

This skill is the technical contract — how to build one hyperframes project. The body below is the build guide; per-topic detail lives in references/ (index next), read on demand. Process docs (brief, storyboard, review, production, dispatch, frame-worker) live in /hyperframes → references/. Other concerns live in the sibling domain skills — hyperframes-animation, hyperframes-creative, media-use, hyperframes-cli, hyperframes-registry. The capability map in /hyperframes says what each one covers.