Next.js Operations

The App Router as an operational surface: what crosses the server/client boundary, which caching model the app is actually on, why a response is stale, and what a Server Action really is on the wire. React itself belongs to react-ops; styling to tailwind-ops; the CMS above to payloadcms-ops; the Workers runtime below to cloudflare-ops / hono-ops. This skill is the framework.

Verified against Next.js 16.x (2026-08-30) — next@16.3.3, docs snapshot 2026-08-25, React 19. Semantics changed materially at 15.0 (fetch uncached by default, request APIs async) and again at 16.0 (Cache Components, proxy.ts, revalidateTag signature). Establish the app's version before answering any caching question — the right answer for 14 is the wrong answer for 16.