SKILL.md
Motion Principles
Decide how something should move so it feels right — independent of the tool used to build it. This skill answers timing, easing, spacing, weight, and rhythm. It does not pick a tech stack; it produces concrete numbers (durations, cubic-bezier curves, stagger offsets, spring configs) ready to hand to any implementation.
When to use
- Motion feels stiff, floaty, mechanical, robotic, or cheap and needs diagnosis.
- Choosing a clip or transition's duration, easing curve, and stagger offset.
- Reviewing whether motion respects physics intuition (weight, follow-through, arcs).
- Synchronizing keyframes to a musical beat or edit accent.
Three pillars — settle these before any number
Every piece of motion should answer three questions before you pick a duration or curve. Skip them and you get technically-correct motion that feels like nothing. These are the shared vocabulary the rest of the collection refers back to.