@vercel/next-upgrade

Upgrade Next.js to the latest version following official migration guides and codemods. Use when upgrading Next.js versions, running codemods, or migrating between major releases.

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SKILL.md
namenext-upgrade
descriptionUpgrade Next.js to the latest version following official migration guides and codemods. Use when upgrading Next.js versions, running codemods, or migrating between major releases.
metadatahttps://nextjs.org/docs/app/guides/upgrading, https://nextjs.org/docs/app/guides/upgrading/codemods
retrievalnext.config.*, package.json, \bnpx\s+@next/codemod\b, \bnpm\s+(install|i|add)\s+[^\n]*\bnext@, \bpnpm\s+(install|i|add)\s+[^\n]*\bnext@, \bbun\s+(install|i|add)\s+[^\n]*\bnext@, \byarn\s+add\s+[^\n]*\bnext@, upgrade next, upgrade nextjs, migrate next, update next.js, next.js upgrade, nextjs migration, next codemod, [upgrade, next], [migrate, next], [update, nextjs], breaking changes, codemod, migration guide, version upgrade
chainTonext upgrade, nextjs migration, next codemod, upgrade Next.js to latest version, run Next.js codemods, migrate between major Next.js versions, codemod, migration, upgrade, breaking changes

Upgrade Next.js

Upgrade the current project to the latest Next.js version following official migration guides.

Instructions

  1. Detect current version: Read package.json to identify the current Next.js version and related dependencies (React, React DOM, etc.)

  2. Fetch the latest upgrade guide: Use WebFetch to get the official upgrade documentation:

  3. Determine upgrade path: Based on current version, identify which migration steps apply. For major version jumps, upgrade incrementally (e.g., 13 → 14 → 15).

  4. Run codemods first: Next.js provides codemods to automate breaking changes:

    npx @next/codemod@latest <transform> <path>

    Common transforms:

    • next-async-request-api - Updates async Request APIs (v15)
    • next-request-geo-ip - Migrates geo/ip properties (v15)
    • next-dynamic-access-named-export - Transforms dynamic imports (v15)

  5. Update dependencies: Upgrade Next.js and peer dependencies together:

    npm install next@latest react@latest react-dom@latest

  6. Review breaking changes: Check the upgrade guide for manual changes needed:

    • API changes (e.g., async params in v15)
    • Configuration changes in next.config.js
    • Deprecated features being removed

  7. Update TypeScript types (if applicable):

    npm install @types/react@latest @types/react-dom@latest

  8. Test the upgrade:

    • Run npm run build to check for build errors
    • Run npm run dev and test key functionality

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