bun

Bun fast JavaScript runtime and bundler. Use for fast JS development.

7 stars

byG1Joshi

View on GitHub Installation ↓

Best use case

bun is best used when you need a repeatable AI agent workflow instead of a one-off prompt.

Bun fast JavaScript runtime and bundler. Use for fast JS development.

Teams using bun should expect a more consistent output, faster repeated execution, less prompt rewriting.

When to use this skill

You want a reusable workflow that can be run more than once with consistent structure.

When not to use this skill

You only need a quick one-off answer and do not need a reusable workflow.
You cannot install or maintain the underlying files, dependencies, or repository context.

Installation

Claude Code / Cursor / Codex

$curl -o ~/.claude/skills/bun/SKILL.md --create-dirs "https://raw.githubusercontent.com/G1Joshi/Agent-Skills/main/skills/frameworks/bun/SKILL.md"

Manual Installation

Download SKILL.md from GitHub
Place it in .claude/skills/bun/SKILL.md inside your project
Restart your AI agent — it will auto-discover the skill

How bun Compares

Feature / Agent	bun	Standard Approach
Platform Support	Not specified	Limited / Varies
Context Awareness	High	Baseline
Installation Complexity	Unknown	N/A

Frequently Asked Questions

What does this skill do?

Bun fast JavaScript runtime and bundler. Use for fast JS development.

Where can I find the source code?

You can find the source code on GitHub using the link provided at the top of the page.

SKILL.md Source

# Bun

Bun is a drop-in replacement for Node.js, written in Zig. It is **fast**. v1.1 brings Windows support.

## When to Use

- **Speed**: `bun install` is instant. `bun run` starts instantly.
- **Local Dev**: Use it as a package manager even if you use Node.js for production.
- **Testing**: `bun test` is a fast, Jest-compatible test runner.

## Core Concepts

### Drop-in Replacement

Implements Node APIs (`fs`, `http`, `path`).

### Bundle / Transpile

Built-in transpiler for TS/JSX.

### Macros

Run code at build time.

## Best Practices (2025)

**Do**:

- **Use `bun install`**: It's compatible with `package-lock.json` but faster.
- **Use `bun test`**: It's much faster than Jest/Vitest.
- **Use `Bun.serve`**: For max performance HTTP servers.

**Don't**:

- **Don't use for everything**: Some niche Node C++ addons might still have issues.

## References

- [Bun Documentation](https://bun.sh/)