Vercel released react-best-practices, a structured repository containing 40+ performance optimization rules across 8 categories, prioritized by impact. The framework emphasizes fixing high-impact issues first (eliminating waterfalls and reducing bundle size) before micro-optimizations. Each rule includes impact ratings and code examples. The repository is formatted for AI agents and LLMs, packaged as Agent Skills that integrate with coding assistants like Cursor and Claude Code to suggest performance fixes during development.