name: tsdown
description: tsdown is a fast and elegant TypeScript library bundler powered by Rolldown and Oxc
license: MIT

tsdown

Rolldown + Oxc powered TypeScript bundler. Drop-in tsup replacement.

When to Use

• Building TypeScript libraries
• Generating .d.ts declarations
• Publishing npm packages
• Dual ESM/CJS output
• Vue/React component libraries

Quick Start

npm i -D tsdown typescript

// tsdown.config.ts
import { defineConfig } from 'tsdown'

export default defineConfig({
  entry: 'src/index.ts',
  format: 'esm',
  dts: true,
  exports: true,
})

tsdown           # Build
tsdown --watch   # Watch mode

Reference Files

Load Based on Task

Setting up config? → Load config.md
Configuring output? → Load output.md
Using features? → Load features.md
Plugins/migration? → Load advanced.md

Cross-Skill References

• Library patterns → Use ts-library skill
• Vue component libs → Use vue skill
• Package management → Use pnpm skill