# Bun

> Bun all-in-one JavaScript runtime and toolkit reference. Covers runtime APIs (file I/O, HTTP server, SQLite, shell), ultra-fast package manager, built-in bundler with plugins, test runner with mocking, TypeScript support, and Node.js compatibility.

- Skill: `bytesagain/bun` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add bytesagain/bun`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bytesagain/bun/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: bytesagain (https://skillmd.com/u/bytesagain)
- Updated: 2026-08-19
- Page: https://skillmd.com/skills/bytesagain/bun

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# Bun Reference

All-in-one JavaScript runtime, bundler, and package manager.

## Commands

| Command | Description |
|---------|-------------|
| `intro` | Overview, comparison |
| `runtime` | APIs, server, SQLite, shell |
| `packages` | Package manager, speed |
| `bundler` | Build, plugins |
| `testing` | Tests, mocking, coverage |