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Next.js 16 Facts

draft, under review2 bundled files

Next.js changes its API surface every few versions and training data is usually wrong about it. This checks your code against the version you actually installed, not what a model remembers.

Install
/plugin marketplace add Selwynuy/selwynuy
/plugin install selwyn-handbook@selwyn-handbook
# then run: /selwyn-handbook:nextjs-16-facts

Or read it as SKILL.md.

When it activates

Use this skill when writing or reviewing Next.js routing, params, route handlers, metadata, caching, or middleware in a 15+/16+ project.

Reads from

project-setupsystem-architecturetype-system

What ships in the bundle

  • scriptscripts/check-next-version.mjsReads the target's installed Next.js version and reports whether bundled docs exist to treat as ground truth.
  • referencereferences/verified-facts.mdThe version-specific breaking changes with the fix for each, and the rule that bundled docs override memory.

1 run, the rest load on demand.