tsdown — Skills — getagentictools

What it does

Build with Node.js 22+ in CI (e.g. set target: 'node18' or target: 'node20').

Building TypeScript/JavaScript libraries for npm

Generating TypeScript declaration files (.d.ts)

Bundling for multiple formats (ESM, CJS, IIFE, UMD)

Optimizing bundles with tree shaking and minification

Migrating from tsup with minimal changes

Building React, Vue, Solid, or Svelte component libraries

Source

Repository: https://github.com/antfu/skills

tsdown FAQ

What does the tsdown skill do?

Bundle TypeScript and JavaScript libraries with blazing-fast speed powered by Rolldown. Use when building libraries, generating type declarations, bundling for multiple formats, or migrating from tsup. Build with Node.js 22+ in CI (e.g. set target: 'node18' or target: 'node20'). Building TypeScript/JavaScript libraries for npm

What does tsdown require?

If your package needs to support Node.js 18 / 20: | CSS handling | [experimental] css: { ... } — full pipeline with preprocessors, Lightning CSS, PostCSS, CSS modules, code splitting; requires @tsdown/css | option-css | Cross-Platform Executable (requires @tsdown/exe)

How do I install tsdown?

Run: npx -y skills add https://github.com/antfu/skills --skill tsdown --agent claude-code — the source lives at github.com/antfu/skills.

Maintain tsdown?

Let people know it's listed here — add the badge (live metrics, light/dark aware) or a plain link to your README or docs.

[![tsdown on getagentictools](https://getagentictools.com/badge/skills/antfu-skills-tsdown.svg)](https://getagentictools.com/skills/antfu-skills-tsdown?ref=badge)

npx agentictools info skills/antfu-skills-tsdown

The second line is the CLI lookup for this page — handy in READMEs and docs.