Conduct rigorous, adversarial code reviews with zero tolerance for mediocrity. Use when users ask to "critically review" my code or a PR, "critique my code", "find issues in my code", or "what's wrong with this code". Identifies security holes, lazy patterns, edge case failures, and bad practices across Python, R, JavaScript/TypeScript, SQL, and front-end code. Scrutinizes error handling, type safety, performance, accessibility, and code quality. Provides structured feedback with severity tiers (Blocking, Required, Suggestions) and specific, actionable recommendations.
Creates, reviews, and debugs UI motion and animation implementations. Covers springs, gestures, drag interactions, clip-path reveals, easing, timing, and animation review. Use when designing, implementing, or reviewing motion, CSS transitions, keyframes, framer-motion, spring animations, asking "add animations to", "make this feel smooth", "review my animations", "should this animate", or "add a swipe gesture"
React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.