Bun

This replaces Node.js with Bun as your default JavaScript runtime in Claude projects. It maps common npm commands to their Bun equivalents (bun add instead of npm install, bunx instead of npx) and handles TypeScript execution without configuration. The skill includes built-in guardrails against typosquatting and warns against running untrusted remote scripts, which is smart given how easy bun makes it to execute arbitrary .ts files. Most useful when starting greenfield projects or if you're already committed to the Bun ecosystem. The command reference table is handy if you're still thinking in npm terms.