# Nextjs App Router

> Routing, layouts, streaming and cache semantics in the Next.js App Router: which boundary makes a component a server component, why a fetch is deduplicated, when revalidation actually happens, and reading the build output to see what became static.

- Skill: `gulmezeren2-byte/nextjs-app-router` (Agent Skill)
- Install (CLI): `npx skillmds@latest add gulmezeren2-byte/nextjs-app-router`
- Raw SKILL.md: https://api.skillmd.com/api/skills/gulmezeren2-byte/nextjs-app-router/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: gulmezeren2-byte (https://skillmd.com/u/gulmezeren2-byte)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/gulmezeren2-byte/nextjs-app-router

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# nextjs-app-router

Routing, layouts, streaming and cache semantics in the Next.js App Router:
which boundary makes a component a server component, why a fetch is
deduplicated, when revalidation actually happens, and reading the build output
to see what became static.