What problem does it solve? Animation code often passes review because it technically works while feeling sluggish, firing too often, or dropping frames. This Skill applies a strict, opinionated review bar to motion code so feel-breaking regressions get flagged instead of merged. ## Core Features & Use Cases - Ten non-negotiable standards: Checks justified motion, frequency-appropriateness, easing, sub-300ms durations, transform origins, interruptibility, GPU-only properties, accessibility, asymmetric timing, and cohesion. - Escalation triggers and remedial hierarchy: Hard-flags patterns like transition: all, scale(0), ease-in on UI, and layout-property animation, then proposes fixes ordered from deletion down to polish. - Structured verdict output: Produces a findings table plus a tiered verdict ending in an explicit Block or Approve decision, citing exact values from STANDARDS.md. - Use Case: A pull request adds a dropdown that fades in over 400ms with ease-in and transform-origin: center. The review flags the easing, duration, and origin, and prescribes a 150–250ms ease-out transition scaling from the trigger. ## Quick Start Review the animation and transition code in this pull request and give me a findings table with a block or approve verdict.
