Bun LLM Documentation

Bun provides comprehensive LLM-optimized documentation at https://bun.sh/llms.txt .

When to Use

Fetch this documentation when:

• Setting up a new Bun project or migrating from Node.js

• Working with Bun-specific APIs (SQLite, S3, Redis, FFI)

• Configuring the bundler, minifier, or bytecode caching

• Writing tests with bun test

• Using Bun's shell scripting API

• Deploying to cloud platforms (AWS Lambda, Vercel, Railway)

Key Topics Covered

• Runtime: File I/O, HTTP Server, WebSockets, Workers, Streams

• Bundler: CSS, HTML, Hot Reloading, Macros, Plugins, Executables

• Package Manager: Install, Add, Update, Workspaces, Lockfile

• Testing: Coverage, Mocks, Snapshots, DOM testing, Jest migration

• Ecosystem: Elysia, Express, Hono, Drizzle, Prisma, Next.js, Remix

Quick Reference

// Fetch Bun docs via Firecrawl const docs = await firecrawl.scrape({ url: "https://bun.sh/llms.txt", formats: ["markdown"] });

Key APIs Documented

Module Description

Bun.serve

HTTP server with WebSocket support

Bun.file

File I/O with lazy loading

Bun.build

JavaScript/TypeScript bundler

Bun.$

Shell scripting API

Bun.sql

SQL database client

bun:sqlite

SQLite database

bun:ffi

Foreign function interface

Related Skills

• elysia-llm-docs

• Elysia web framework

• effect-patterns

• Effect TypeScript patterns