rollup

Rollup ES module bundler. Use for library bundling.

7 stars

byG1Joshi

View on GitHub Installation ↓

Best use case

rollup is best used when you need a repeatable AI agent workflow instead of a one-off prompt.

Rollup ES module bundler. Use for library bundling.

Teams using rollup should expect a more consistent output, faster repeated execution, less prompt rewriting.

When to use this skill

You want a reusable workflow that can be run more than once with consistent structure.

When not to use this skill

You only need a quick one-off answer and do not need a reusable workflow.
You cannot install or maintain the underlying files, dependencies, or repository context.

Installation

Claude Code / Cursor / Codex

$curl -o ~/.claude/skills/rollup/SKILL.md --create-dirs "https://raw.githubusercontent.com/G1Joshi/Agent-Skills/main/skills/tools/rollup/SKILL.md"

Manual Installation

Download SKILL.md from GitHub
Place it in .claude/skills/rollup/SKILL.md inside your project
Restart your AI agent — it will auto-discover the skill

How rollup Compares

Feature / Agent	rollup	Standard Approach
Platform Support	Not specified	Limited / Varies
Context Awareness	High	Baseline
Installation Complexity	Unknown	N/A

Frequently Asked Questions

What does this skill do?

Rollup ES module bundler. Use for library bundling.

Where can I find the source code?

You can find the source code on GitHub using the link provided at the top of the page.

SKILL.md Source

# Rollup

Rollup (v4) is the bundler of choice for **libraries**. It produces smaller, cleaner code than Webpack and pioneered Tree Shaking.

## When to Use

- **NPM Packages**: Building a library for others to use.
- **Flat Bundling**: "Scope Hoisting" puts everything in one closure for performance.

## Core Concepts

### Tree Shaking

Rollup analyzes the import graph and excludes unused code statically.

### Formats

Outputs `esm`, `cjs`, `umd`, `iife`.

### Plugins

The ecosystem that Vite adopted.

## Best Practices (2025)

**Do**:

- **Use `pkg.exports`**: Configure `package.json` exports correctly for ESM/CJS dual publish.
- **Externalize dependencies**: Don't bundle `react` into your library. Mark it as external.

**Don't**:

- **Don't use for Apps**: Use Vite (which uses Rollup internally) for apps. Use Rollup directly for libs.

## References

- [Rollup Documentation](https://rollupjs.org/)