What problem does it solve? Animation code often passes review because it technically works while feeling sluggish, firing too often, animating layout properties, or ignoring reduced-motion preferences. This Skill applies a strict, opinionated craft bar to motion code so feel-breaking regressions get flagged instead of merged. ## Core Features & Use Cases - Standards-Based Review: Evaluates every animation in a diff against ten non-negotiable standards covering justified motion, frequency-appropriateness, easing, sub-300ms durations, transform origin, interruptibility, GPU-only properties, accessibility, asymmetric timing, and cohesion. - Escalation Triggers: Hard-flags known anti-patterns on sight, such as transition: all, scale(0) entrances, ease-in on UI, keyframes on toasts, and missing prefers-reduced-motion handling. - Structured Output: Produces a findings table with before/after fixes and a tiered verdict ending in an explicit Block or Approve decision. - Use Case: A pull request adds a dropdown that scales from center with ease-in over 400ms. The review flags the wrong transform origin, the sluggish easing, and the excessive duration, then prescribes scale(0.95) + opacity with a custom ease-out curve under 300ms. ## Quick Start Review the animation and motion code in this pull request against the animation craft standards and give me a findings table with a block or approve verdict.
