Next.js Best Practices skill: what it does and how to install it

What it does. Applies Next.js App Router patterns to choose Server or Client Components, structure routes, fetch and cache data, handle mutations, and define route handlers. It also covers loading and error states, metadata, image and bundle optimisation, and project organisation.

When to use it. Use it when building or reviewing a Next.js App Router application. Apply it only to tasks within this development scope, and validate the result against the project environment and tests.