What problem does it solve? Animation code often passes review because it technically runs, yet feels sluggish, fires too often, drops frames, or ignores accessibility. This Skill applies a strict, opinionated craft bar to motion code so feel-breaking regressions are caught before merge. ## Core Features & Use Cases - Ten non-negotiable standards: Checks justified motion, frequency-appropriateness, responsive easing, sub-300ms UI durations, transform-origin correctness, interruptibility, GPU-only properties, reduced-motion support, asymmetric timing, and cohesion. - Escalation triggers and remedial hierarchy: Flags transition: all, scale(0), ease-in on UI, layout-property animation, and Framer Motion shorthand props on sight, then proposes fixes ordered from deletion down to polish. - Structured verdict output: Produces a findings table (Before/After/Why) plus a tiered verdict ending in an explicit Block or Approve decision, citing exact values from STANDARDS.md. - Use Case: Paste a diff adding a dropdown that animates with ease-in over 400ms from transform-origin: center; the review flags the easing, duration, and origin, and supplies the corrected cubic-bezier curve and trigger-anchored origin. ## Quick Start Ask the assistant to review the animation code in your current diff against the motion craft standards and return a findings table with a block or approve verdict.
