rollup

When to use this skill

Use this skill whenever the user wants to:

• Bundle JavaScript libraries with tree shaking and multi-format output (ESM/CJS/UMD)
• Configure Rollup input, output, plugins, and external dependencies
• Optimize bundle size with code splitting and dead code elimination
• Build libraries for npm distribution

How to use this skill

Workflow

1. Configure — create rollup.config.js with input, output, and plugins
2. Build — run rollup -c to generate bundles
3. Validate — check output formats, bundle size, and tree shaking effectiveness
4. Publish — set main, module, and exports in package.json

Quick Start Example