Bun

This gives Claude command mappings and API patterns to work with Bun instead of Node.js tooling. It covers the obvious stuff like swapping `npm install` for `bun install`, but also pushes toward Bun's native APIs: `Bun.serve()` for HTTP servers, `bun:sqlite` instead of better-sqlite3, `Bun.file()` over fs methods. The frontend section is interesting because it shows how to skip Vite entirely and use Bun's built-in bundler with HTML imports and hot reload. Most useful if you're already committed to Bun and want Claude to stop reaching for express or webpack out of habit.