HyperFrames Keyframes

Keyframes are a pose contract: visible states, continuous subject identity, seek-safe runtime, verified pixels.

Use hyperframes-animation for broad scene recipes. Use hyperframes-cli for full command docs. Use references/keyframe-patterns.md only when choosing implementation mechanisms, not visual style.

Creator editing boundary

Keyframes own visual motion, not clip assembly. Source-range hard cuts, trim, splice, and reorder belong to /hyperframes-core: author one media element per kept range, place it with data-start and data-duration, and select its source offset with data-media-start. Adjacent ranges make a hard cut. A crossfade uses overlapping clips on different tracks plus visual opacity keyframes; sound fades use /hyperframes-audio.