Bun Dev

The single Bun skill: self-contained knowledge (below) + an opinionated rule set (rules/) + an optional native audit/fix engine (codex-dev bun). It works with zero tooling; the Power Tools section adds automation when codex-dev is installed.

Product summary

Bun is an all-in-one JavaScript/TypeScript toolkit: a fast runtime (drop-in Node.js replacement on JavaScriptCore), package manager, bundler, and test runner, all shipped as one bun binary. Key files: bunfig.toml (config), bun.lock (text lockfile, default since Bun 1.2), package.json. Primary commands: bun run, bun install / bun ci, bun build, bun test. Full docs: https://bun.com/docs (agent index: https://bun.com/docs/llms.txt).

When to use