# Nextjs V16

> Next.js 16 migration guide (async request APIs, "use cache", Turbopack)

- Skill: `ulpi-io/nextjs-v16` (Agent Skill, multi-file: 5 files)
- Install (CLI): `npx skillmds@latest add ulpi-io/nextjs-v16`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ulpi-io/nextjs-v16/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: ulpi-io (https://skillmd.com/u/ulpi-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ulpi-io/nextjs-v16

---


# Next.js 16

- Async `params`/`cookies`/`headers`; opt-in caching via `"use cache"`; Turbopack default.

Anti-patterns:

- ❌ Sync request APIs; ✅ `await` `params`, `cookies()`, and `headers()`.
- ❌ Keep `middleware.ts`; ✅ use `proxy.ts` and `export function proxy`.
- ❌ `revalidateTag("posts")`; ✅ `revalidateTag("posts", "max")` or `{ expire: ... }`.

References: `references/migration-checklist.md`, `references/cache-components.md`, `references/turbopack.md`