nextjs-turbopack
Next.js 16+ and Turbopack — incremental bundling, FS caching, dev speed, and when to use Turbopack vs webpack.
About this skill
This skill provides an AI agent with comprehensive knowledge about Next.js 16+ Turbopack, focusing on its role as the default incremental bundler for local development. It details how Turbopack, written in Rust, significantly enhances development workflows through faster cold starts and Hot Module Replacement (HMR), especially beneficial for large applications. The skill clarifies the optimal scenarios for leveraging Turbopack in daily development and provides guidance on when to consider using Webpack as a fallback for legacy compatibility or specific plugin requirements. It also touches upon how to disable Turbopack in development and notes that production build behavior (`next build`) may vary. This skill enables the AI to inform developers about best practices for modern Next.js bundling strategies.
Best use case
An AI agent can use this skill to explain the advantages of Next.js Turbopack, compare it with Webpack, and advise developers on the most efficient bundling setup for their Next.js projects, particularly regarding development speed and tooling choices.
Next.js 16+ and Turbopack — incremental bundling, FS caching, dev speed, and when to use Turbopack vs webpack.
The AI agent will provide clear, concise, and accurate information regarding Next.js Turbopack, its benefits for development, and practical guidance on choosing between Turbopack and Webpack. Users will gain a better understanding of modern Next.js bundling strategies and optimal development setups.
Practical example
Example input
Can you explain Next.js Turbopack and when I should use it over Webpack?
Example output
Next.js 16+ uses Turbopack by default for local development. Turbopack is an incremental bundler written in Rust that significantly speeds up your development server startup and Hot Module Replacement (HMR), especially for large applications. You should use Turbopack for day-to-day development to leverage these speed benefits. Webpack is generally a fallback for legacy situations, like encountering a Turbopack bug or needing a Webpack-only plugin in dev. You can disable Turbopack using flags like `--webpack` or `--no-turbopack` depending on your Next.js version. For production builds (`next build`), the bundler behavior might be different, so always check the latest Next.js docs for details.
When to use this skill
- When explaining Next.js 16+ development tooling to a user.
- When advising on local development setup for Next.js projects, emphasizing faster cold starts and Hot Module Replacement (HMR) in large applications (defaulting to Turbopack).
- When asked about the differences and appropriate use cases for Turbopack vs. Webpack in a Next.js context.
When not to use this skill
- When the user specifically asks about advanced debugging steps or intricate configurations for either bundler beyond the scope of this explanatory skill.
- If the user requires information about Next.js versions older than 16 that do not use Turbopack by default.
- When providing definitive instructions for production build behaviors, as the skill's description of 'Production' usage is truncated.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/nextjs-turbopack/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How nextjs-turbopack Compares
| Feature / Agent | nextjs-turbopack | Standard Approach |
|---|---|---|
| Platform Support | Claude | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | easy | N/A |
Frequently Asked Questions
What does this skill do?
Next.js 16+ and Turbopack — incremental bundling, FS caching, dev speed, and when to use Turbopack vs webpack.
Which AI agents support this skill?
This skill is designed for Claude.
How difficult is it to install?
The installation complexity is rated as easy. You can find the installation instructions above.
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.
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SKILL.md Source
# Next.js and Turbopack Next.js 16+ uses Turbopack by default for local development: an incremental bundler written in Rust that significantly speeds up dev startup and hot updates. ## When to Use - **Turbopack (default dev)**: Use for day-to-day development. Faster cold start and HMR, especially in large apps. - **Webpack (legacy dev)**: Use only if you hit a Turbopack bug or rely on a webpack-only plugin in dev. Disable with `--webpack` (or `--no-turbopack` depending on your Next.js version; check the docs for your release). - **Production**: Production build behavior (`next build`) may use Turbopack or webpack depending on Next.js version; check the official Next.js docs for your version. Use when: developing or debugging Next.js 16+ apps, diagnosing slow dev startup or HMR, or optimizing production bundles. ## How It Works - **Turbopack**: Incremental bundler for Next.js dev. Uses file-system caching so restarts are much faster (e.g. 5–14x on large projects). - **Default in dev**: From Next.js 16, `next dev` runs with Turbopack unless disabled. - **File-system caching**: Restarts reuse previous work; cache is typically under `.next`; no extra config needed for basic use. - **Bundle Analyzer (Next.js 16.1+)**: Experimental Bundle Analyzer to inspect output and find heavy dependencies; enable via config or experimental flag (see Next.js docs for your version). ## Examples ### Commands ```bash next dev next build next start ``` ### Usage Run `next dev` for local development with Turbopack. Use the Bundle Analyzer (see Next.js docs) to optimize code-splitting and trim large dependencies. Prefer App Router and server components where possible. ## Best Practices - Stay on a recent Next.js 16.x for stable Turbopack and caching behavior. - If dev is slow, ensure you're on Turbopack (default) and that the cache isn't being cleared unnecessarily. - For production bundle size issues, use the official Next.js bundle analysis tooling for your version.
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