概要
This skill guides developers through the architectural shift from legacy client-side synchronization to async-native patterns using React 19 and Next.js App Router. It systematically identifies and eliminates common anti-patterns, such as excessive useEffect usage and client-side data waterfalls, by promoting Server Components, Server Actions, and the use() API. It is an essential tool for teams migrating legacy Pages Router projects or building high-performance, SEO-friendly applications that leverage the latest React primitives and streaming capabilities.