What problem does it solve? Animation code often passes review because it technically works while feeling sluggish, firing too often, or dropping frames in production. This Skill applies a strict, opinionated review bar to motion code so feel-breaking regressions are caught before merge. ## Core Features & Use Cases - Standards-based review: Evaluates every animation against ten non-negotiable rules covering justified motion, frequency-appropriateness, easing, sub-300ms durations, transform origin, interruptibility, GPU-only properties, accessibility, asymmetric timing, and cohesion. - Precise value citations: Pulls exact easing curves, duration tables, spring configs, and gesture thresholds from a bundled standards reference instead of approximating. - Structured verdict output: Produces a findings table with before/after fixes plus a tiered verdict ending in an explicit Block or Approve decision. - Use Case: A pull request adds a dropdown that animates with transition: all 400ms ease-in from scale(0). The review flags the unbounded transition, the ease-in curve, the over-budget duration, and the wrong origin, then prescribes transform 200ms with a strong ease-out from scale(0.95) anchored to the trigger. ## Quick Start Ask the assistant to review the animation and motion code in the current diff using the review-animations standards.
