next-upgrade

To upgrade Next.js across a major release safely, this Skill detects the current version from package.json, fetches official migration docs, applies codemods, updates dependencies, and verifies the build. It automates incremental upgrade paths to minimize manual errors.

The safest way to migrate a large Next.js codebase is using automated codemods combined with official upgrade guides. This Skill detects your current version, applies necessary code transformations, updates dependencies, and runs build validations to reduce regression risk.

Yes, you can use codemods to handle breaking changes when updating Next.js dependencies. This Skill fetches official migration guides, executes the appropriate codemods for your target version, and updates dependencies automatically to ensure reproducible upgrade steps.

Yes, this Next.js upgrade process works with both JavaScript and TypeScript projects. It evaluates your project configuration, applies version-specific codemods, and updates dependencies regardless of whether your codebase uses JavaScript or TypeScript.

A limitation of automating a Next.js major version upgrade is that while codemods and dependency updates are handled automatically, you may still need manual intervention for custom configurations. However, this Skill validates the build afterward to catch regressions early.