Bun

This gives Claude full context on Bun, the JavaScript runtime that's actually fast enough to matter. It covers the package manager that blows away npm on speed, the built-in HTTP server with WebSocket pub/sub, native SQLite and password hashing, and the bundler. The skill shows real patterns for serving files, running TypeScript without transpiling, and using Bun's file I/O APIs that are genuinely faster than Node. Use it when you're building anything in the Bun ecosystem or migrating from Node and want Claude to know about bun:sqlite, Bun.serve, and all the built-in stuff that makes Bun different. The examples are practical, the testing section is complete, and it doesn't pretend Bun is just another JavaScript runtime.

skills.sh installs: 191
GitHub stars: 296
last updated: Aug 21, 2026

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Install

$ npx -y skills add hoodini/ai-agents-skills --skill bun --agent claude-code

Installs into .claude/skills of the current project.

Files

Bun - The Fast JavaScript Runtime

Build and run JavaScript/TypeScript applications with Bun's all-in-one toolkit.

Quick Start

# Install Bun (macOS, Linux, WSL)
curl -fsSL https://bun.sh/install | bash

# Windows
powershell -c "irm bun.sh/install.ps1 | iex"

# Create new project
bun init

# Run TypeScript directly (no build step!)
bun run index.ts

# Install packages (faster than npm)
bun install

# Run scripts
bun run dev

Package Management

# Install dependencies
bun install              # Install all from package.json
bun add express          # Add dependency
bun add -d typescript    # Add dev dependency
bun add -g serve         # Add global package

# Remove packages
bun remove express

# Update packages
bun update

# Run package binaries
bunx prisma generate     # Like npx but faster
bunx create-next-app

# Lockfile
bun install --frozen-lockfile  # CI mode

bun.lockb vs package-lock.json

# Bun uses binary lockfile (bun.lockb) - much faster
# To generate yarn.lock for compatibility:
bun install --yarn

# Import from other lockfiles
bun install  # Auto-detects package-lock.json, yarn.lock