Upgrade Next.js

SkillCommerce & finance

Upgrade Next.js to the latest version following official migration guides and codemods

Available today. Use it from your connected AI after setup.

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Connect ahel once, and every AI you use reads what you have installed.

Then ask your AI: use the Upgrade Next.js skill

What this skill tells your AI

The instructions your AI receives, as published by legions-developer/invoicely in .agents/skills/next-upgrade/SKILL.md and read by ahel’s review.

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

Detect current version: Read package.json to identify the current Next.js version and related dependencies (React, React DOM, etc.)
Fetch the latest upgrade guide: Use WebFetch to get the official upgrade documentation:
- Codemods: https://nextjs.org/docs/app/guides/upgrading/codemods
- Version-specific guides (adjust version as needed):
Determine upgrade path: Based on current version, identify which migration steps apply. For major version jumps, upgrade incrementally (e.g., 13 → 14 → 15).
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)
Update dependencies: Upgrade Next.js and peer dependencies together:
```
npm install next@latest react@latest react-dom@latest
```
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

Update TypeScript types (if applicable):

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

Test the upgrade:
- Run npm run build to check for build errors
- Run npm run dev and test key functionality

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