Performance Optimizer

This one gives Claude a structured approach to performance optimization based on the "measure first, optimize second" principle. It comes loaded with specific performance budgets including Core Web Vitals targets (LCP under 2.5s, FID under 100ms, CLS under 0.1) and covers the usual suspects: bundle size limits, database query optimization, caching strategies, and memory management. The skill includes sections on frontend, backend, and database performance, plus profiling tools and monitoring setup. If you're tired of premature optimization or need concrete benchmarks to argue against "just make it faster" requests, this gives you a systematic framework and actual numbers to work with.