Motion Doctrine

Motion-doctrine is a gateway skill you load before writing any HyperFrames animation, and it's about continuity rather than any single effect. Its core rule is the vector law: however a scene exits, the next one enters on the same axis, in the same direction, at matching speed, cut mid-motion on both sides. It also sets a dominant "current" direction per film, bans idle sine-wobble that makes scenes look like they're waiting, and ships a verifier (seam-gate.mjs) that exits non-zero if a seam fails. Use it when multi-scene videos feel like stacked slides instead of one camera move. The main cost is process: you write a ledger.json of seams before touching the timeline, which feels heavy until you've debugged a mirrored Z-scale entrance once.

skills.sh installs: 62.2K
GitHub stars: 81.8K
last updated: Oct 26, 2026

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Install

$ npx -y skills add heygen-com/hyperframes --skill motion-doctrine --agent claude-code

Installs into .claude/skills of the current project.

Files

Motion Doctrine (Gateway)

Read this before composing any animation. It decides WHAT happens at every seam and how every scene performs; the technique skills implement it. These rules supersede generic / upstream motion guidance. The failure this prevents: scenes authored in isolation — the eye's momentum dies at every cut, and scenes wobble in place between entry and exit.