Tsdown

A TypeScript bundler built on Rolldown and Oxc that positions itself as a drop-in replacement for tsup. It handles the standard library build workflow: dual ESM/CJS output, declaration file generation, package.json validation, and watch mode. The skill documentation is well organized with separate references for config, output options, framework integrations, and plugin authoring. It's aimed at library authors who need a modern bundler that just works, with specific consideration for Vue and React component libraries. The reference file structure encourages loading only what you need rather than dumping everything into context, which is a smart approach for a build tool with this many configuration options.

Install to Claude Code

npx -y skills add onmax/nuxt-skills --skill tsdown --agent claude-code