Vercel

Comprehensive React and Next.js performance optimization guidelines from Vercel Engineering covering 57 rules across 8 categories including waterfalls, bundle size, server-side performance, and data fetching.

React composition patterns that scale — compound components, state lifting, and internal composition to eliminate boolean prop proliferation in reusable component libraries.

React Native and Expo best practices for performant mobile apps — 35+ rules across 13 categories including FlashList, Reanimated animations, navigation, and monorepo configuration.

Reviews UI code against Vercel's Web Interface Guidelines — 100+ rules covering accessibility, focus states, forms, animation, typography, dark mode, and i18n.

Deployment skill for Vercel that packages a tarball, auto-detects the framework from package.json, and returns a live Preview URL and Claim URL without requiring prior authentication.

Next.js-specific best practices covering file conventions, RSC boundaries, async APIs, data patterns, error handling, route handlers, image/font optimization, bundling, and debugging.

Teaches the Next.js 16 Cache Components feature (PPR) — use cache directive, cacheLife(), cacheTag(), revalidateTag(), and cache invalidation patterns.

Upgrades a Next.js project to the latest version — reads package.json, fetches official migration guide, runs codemods, updates dependencies, walks through breaking changes.