nextjs-turbopack

Guides Next.js 16+ development with Turbopack bundling, caching, and webpack fallback decisions.

1|Updated Oct 11, 2025
One-click install
npx skills add https://github.com/ibytechaos/claude --skill nextjs-turbopack-ibytechaos
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: nextjs-turbopack
Source: https://github.com/ibytechaos/claude/tree/main/plugins/everything-claude-code/skills/nextjs-turbopack
Command: npx skills add https://github.com/ibytechaos/claude --skill nextjs-turbopack-ibytechaos

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Developers working with Next.js 16+ often face slow dev startup, confusing bundler choices between Turbopack and webpack, and unclear production build behavior. This Skill provides concrete guidance on when to use Turbopack, how its file-system caching works, and how to diagnose slow HMR or bloated bundles. ## Core Features & Use Cases - Bundler Selection Guidance: Clarifies when to use Turbopack (default dev) versus webpack (legacy fallback via --webpack flag) and how production builds differ by Next.js version. - Dev Performance Optimization: Explains incremental bundling and file-system caching under .next that makes restarts 5-14x faster on large projects. - Bundle Analysis: Covers the experimental Bundle Analyzer in Next.js 16.1+ for inspecting output and trimming heavy dependencies. - Use Case: Your Next.js app's dev server takes minutes to start. Use this Skill to confirm Turbopack is active, verify the cache isn't being cleared, and apply Bundle Analyzer insights to reduce cold start time. ## Quick Start Ask the AI to explain why my Next.js 16 dev server is slow and whether I should use Turbopack or webpack for my project.

Frequently Asked Questions about nextjs-turbopack

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I enable Turbopack in Next.js 16?

Turbopack is enabled by default in Next.js 16 when running next dev, so no configuration is needed. To disable it and fall back to webpack, use the --webpack flag (or --no-turbopack depending on your version).

Turbopack vs webpack for Next.js development, which should I use?

Use Turbopack for day-to-day development since it offers faster cold starts and HMR through incremental bundling and file-system caching. Switch to webpack only if you hit a Turbopack bug or depend on a webpack-only plugin in dev.

Why is my Next.js dev server slow to start?

Slow startup usually means Turbopack is disabled or its cache under .next is being cleared between runs. Verify you are on a recent Next.js 16.x release with Turbopack active and avoid deleting the cache directory unnecessarily.

Does Next.js production build use Turbopack?

Production build behavior with next build depends on your Next.js version and may use Turbopack or webpack. Check the official Next.js documentation for your specific release to confirm which bundler runs in production.

How do I analyze bundle size in Next.js 16.1?

Next.js 16.1+ includes an experimental Bundle Analyzer that inspects build output and identifies heavy dependencies. Enable it via config or an experimental flag as described in the Next.js docs for your version.