git:20260621.2caaecc to git:20260905.f7824ba

8 added, 8 removed. Audit A to A.

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name: motion-performance-qa

- description: Run motion performance QA for websites and apps. Use after adding Motion, GSAP, Lenis, scroll scenes, page transitions, hover states, carousels, WebGL sync, observers, timers, RAF loops, or any animation-heavy UI to catch jank, layout shift, leaks, cleanup bugs, reduced-motion gaps, and mobile issues.

+ description: "Review whole motion-system release resilience."

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# Motion Performance QA

## Use This Skill

- Use this skill for audit animation performance, cleanup, accessibility, and jank.

+ Use this skill for release-level coverage across the complete motion system, not for diagnosing one isolated jank symptom.

- ## Operating Contract

+ ## Scoped execution

- 1. Inspect the existing project before changing code.

- 2. Identify the motion stack, scroll behavior, component lifecycle, reduced-motion handling, and available verification commands.

- 3. Keep motion purposeful: clarify sequence, focus, depth, tactility, or product understanding.

- 4. Follow existing project conventions unless a change clearly improves the result.

- 5. Run available checks and visually inspect responsive/reduced-motion output when the change affects UI.

+ Apply the [shared web contract](../website-operating-rules/references/scoped-web-contract.md) once when execution crosses phases; reuse it if already read. Load only the specialist guidance relevant to the requested surface and deliverable.

## Required Reference

Read [references/motion-performance-qa-guide.md](references/motion-performance-qa-guide.md) before making architectural or visible UI changes with this skill.

+ ## Scope and evidence

+ Use for a substantial motion-system review or pre-delivery motion audit. A single measured hitch belongs to `$animation-jank-qa`; preserve resize, route return, cleanup and reduced-motion checks where relevant. Review-only does not implement motion.