What is Turbopack and how does it work?

Turbopack is an incremental bundler for Next.js development, written in Rust. It uses filesystem caching to significantly speed up server startup and hot module replacement, making it ideal for larger applications.

When should I switch back to Webpack?

You should revert to Webpack if you encounter a bug with Turbopack or if your project relies on a specific Webpack plugin that is not compatible with Turbopack.

How do I enable the Bundle Analyzer in Next.js?

The Bundle Analyzer is an experimental feature in Next.js 16.1+ that can be enabled through configuration or a specific flag. Refer to the Next.js documentation for detailed instructions.

What are the best practices for using Turbopack?

Keep your Next.js version updated to the latest 16.x for optimal Turbopack performance. Ensure that Turbopack is enabled and that your filesystem cache is not being cleared unnecessarily.

What changes were made to middleware file naming in Next.js 16?

In Next.js 16, the middleware file should be named `proxy.ts` instead of `middleware.ts`. This change is version-specific, so always check the documentation for your Next.js version.

Next.js and Turbopack

Name: Next.js and Turbopack
Availability: InStock
Author: affaan-m

Free

Accelerate your Next.js development with Turbopack.

by affaan-m239.3k stars on affaan-m/ecc

1 views

Updated Aug 10, 2026

Get this skill

Free · Opens the source repo

What Next.js and Turbopack does

Next.js 16+ integrates Turbopack as the default bundler for local development, providing a significant speed boost for server startup and hot module replacement (HMR). Turbopack is an incremental bundler written in Rust that leverages filesystem caching to enhance performance, making it particularly beneficial for larger applications. By utilizing this skill, developers can streamline their workflow and reduce the time spent waiting for changes to reflect during the development process.

The skill is designed for developers working with Next.js 16 or later, who want to optimize their development experience. By running next dev, Turbopack is automatically engaged, allowing for faster cold starts and HMR, which is crucial for maintaining productivity in larger projects. Additionally, the skill provides guidance on when to revert to Webpack, such as in cases of specific bugs or when using exclusive Webpack plugins, ensuring that developers have the flexibility to manage their builds effectively.

Furthermore, the skill highlights the importance of keeping up with Next.js updates to maintain stable performance with Turbopack and filesystem caching. It also introduces the Bundle Analyzer feature available in Next.js 16.1+, which helps identify heavy dependencies and optimize code-splitting. This feature can be invaluable for developers looking to improve their application's performance in production.

In summary, this skill is an essential tool for developers leveraging Next.js 16+, as it not only enhances the development experience through faster build times but also provides insights into optimizing application performance.

When to use it

Use this skill when developing or debugging applications with Next.js 16+, especially if experiencing slow development cycles.

When not to use it

This skill may not be suitable for legacy Next.js applications that rely on Webpack or for projects that require specific Webpack plugins.

What you can build with it

Speed Up Development

Utilize Turbopack for local development to achieve faster server starts and HMR, especially beneficial for large applications.

Optimize Production Builds

Use the Bundle Analyzer to inspect your application's output and identify heavy dependencies to improve production performance.

Transitioning from Webpack

If you're upgrading from an older version of Next.js, learn when to use Webpack versus Turbopack to maintain a smooth development experience.

How to install Next.js and Turbopack

View source

1. Install with the skills CLI

npx skills add affaan-m/ecc/nextjs-turbopack --agent claude-code

2. Or install it manually

Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.

Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs

Inside SKILL.md

Written by affaan-m

Next.js y Turbopack

Next.js 16+ usa Turbopack por defecto para el desarrollo local: un bundler incremental escrito en Rust que acelera significativamente el inicio del servidor de desarrollo y las actualizaciones en caliente.

Cuándo Usar

Turbopack (desarrollo por defecto): Usar para el desarrollo diario. Inicio en frío y HMR más rápidos, especialmente en apps grandes.
Webpack (desarrollo heredado): Usar solo si encuentras un bug de Turbopack o dependes de un plugin exclusivo de webpack en desarrollo. Desactivar con --webpack (o --no-turbopack según la versión de Next.js; consultar la documentación de tu versión).
Producción: El comportamiento del build de producción (next build) puede usar Turbopack o webpack según la versión de Next.js; consultar la documentación oficial de Next.js para tu versión.

Usar cuando: se desarrollen o depuren apps Next.js 16+, se diagnostique un inicio de desarrollo lento o HMR, o se optimicen bundles de producción.

Cómo Funciona

Turbopack: Bundler incremental para el desarrollo de Next.js. Usa caché en sistema de archivos para que los reinicios sean mucho más rápidos (ej. 5-14x en proyectos grandes).
Por defecto en desarrollo: Desde Next.js 16, next dev se ejecuta con Turbopack a menos que se deshabilite.
Caché en sistema de archivos: Los reinicios reutilizan el trabajo anterior; la caché está típicamente en .next; no se necesita configuración adicional para uso básico.
Bundle Analyzer (Next.js 16.1+): Bundle Analyzer experimental para inspeccionar la salida y encontrar dependencias pesadas; habilitarlo mediante configuración o flag experimental (ver documentación de Next.js para tu versión).

Ejemplos

Comandos

next dev
next build
next start

Uso

Ejecutar next dev para el desarrollo local con Turbopack. Usar el Bundle Analyzer (ver documentación de Next.js) para optimizar el code-splitting y eliminar dependencias grandes. Preferir App Router y server components donde sea posible.

Nomenclatura del Archivo de Middleware

Next.js 16 introdujo proxy.ts como nombre del archivo de middleware, reemplazando la convención anterior de middleware.ts:

Next.js 16+: usar proxy.ts en la raíz del proyecto
Anterior a Next.js 16: usar middleware.ts en la raíz del proyecto

El cambio de nombre de archivo está vinculado a la versión de Next.js, no al bundler que se usa (Turbopack o webpack). Siempre consultar la documentación oficial para la versión que se está revisando.

No marcar proxy.ts como un archivo de middleware mal nombrado o faltante en proyectos Next.js 16. El archivo es correcto e intencional. Sugerir renombrarlo a middleware.ts romperá la ejecución del middleware.

Buenas Prácticas

Mantenerse en una versión reciente de Next.js 16.x para un comportamiento estable de Turbopack y caché.
Si el desarrollo es lento, asegurarse de estar usando Turbopack (predeterminado) y que la caché no se esté borrando innecesariamente.
Para problemas de tamaño de bundle en producción, usar las herramientas oficiales de análisis de bundle de Next.js para tu versión.

Frequently asked questions about Next.js and Turbopack

Similar skills

Playwright Component Testing

Test React and Vue components in isolation with Playwright.

Fluent UI Blazor

Integrate Fluent UI components in Blazor applications effortlessly.

Build MCP App

Create interactive UI widgets for MCP servers.

Web Design Reviewer

Identify and fix design issues in websites efficiently.

Markstream Install

Seamlessly integrate Markstream for Markdown rendering.

GSAP & Framer Scroll Animation

Create advanced scroll animations effortlessly.