nextjs-server-components
Build async React Server Components and place 'use client' boundaries at leaf nodes for interactivity in Next.js App Router. Use when deciding RSC vs Client Component, composing server data into client wrappers, or fixing hydration errors.
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SKILL.md
Server & Client Components
Priority: P0 (CRITICAL)
[!WARNING] If project uses
pages/directory instead of App Router, ignore this skill entirely.
App Router uses React Server Components (RSC) by default.
Workflow: Add Server/Client Component Split
- Default to RSC — Async Server Components for data fetching.
- Push
'use client'to leaves — Interactive leaf nodes only (Button, Form, Chart). Keep layouts/pages as Server Components to maximise RSC benefits. - Compose via children — Pass Server Components as
childrento Client Components. - Serialize props — Server-to-Client props must be serializable (no functions, Dates, or Classes).
- Guard secrets — Import
server-onlyin modules with sensitive logic.
Composition Pattern Example
Implementation Guidelines
- Async RSCs: Fetch directly in async Server Components —
await db.queries,await paramsfor route segments. - Data Fetching:
fetchwithcache: 'no-store'orrevalidate: 0opts out of static rendering. - Streaming: Wrap slow async components in
<Suspense>. Useloading.tsxfor route-level skeletons. - Hydration: Server sends HTML + RSC payload; client hydrates only Client Components. Server Components: zero JS in client bundle.
- Server-in-Client: Cannot import Server Component into Client Component.
- Fix: Pass as
childrenprop. See Composition Example.
Anti-Patterns
- No secrets in Client Components: Use
server-onlypackage to prevent accidental bundling. - No full DB objects passed to client: Minimize serialized props; pass IDs when possible.
- No
useState/useEffectin Server Components: These Client Component-only hooks. - No
'use client'at tree root: Push boundary to leaf components.
References
Server-boundary checklist
- Keep server-only environment variables unprefixed and never echo client-prefix syntax when explaining secret boundaries; do not expose them to client bundles.
Canonical response anchors
When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:
-
Client Component-only hooks
-
await params
-
leaf nodes
-
maximise RSC benefits
-
Additional task-grounded exact anchors: zero JS
Files
4- SKILL.md
3054ad09022.9 KB - evals/evals.json
79a32ce4db4.0 KB - references/composition-security.md
0c34b15fbd995 B - references/example.md
a71a414b66611 B
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