react-server-components-framework

React Server Components Framework

Overview

React Server Components (RSC) enable server-first rendering with client-side interactivity. This skill covers Next.js 16.2 LTS App Router patterns, Server Components, Server Actions, and streaming.

Next.js 16.2.6 / React 19.2.6 (security release, May 2026) — Turbopack is the default bundler (no --turbo flag needed), Server Fast Refresh is on by default, and the new cacheComponents config flag replaces the legacy experimental_ppr escape hatch. For AI-agent debugging Next.js ships Next DevTools MCP — wire npx -y next-devtools-mcp@latest into .mcp.json (it connects via the dev server's /_next/mcp endpoint) to inspect render trees and cache boundaries mid-session.

When to use this skill:

• Building Next.js 16+ applications with the App Router
• Designing component boundaries (Server vs Client Components)
• Implementing data fetching with caching and revalidation
• Creating mutations with Server Actions
• Optimizing performance with streaming and Suspense

Quick Reference

Server vs Client Components

Key Rule: Server Components can render Client Components, but Client Components cannot directly import Server Components (use children prop instead).

Data Fetching Quick Reference

Next.js 16 Cache Components (Recommended):

import { cacheLife, cacheTag } from 'next/cache'

// Default — shared across all users (public CDN-cached)
async function CachedProducts() {
  'use cache'
  cacheLife('hours')
  cacheTag('products')
  return await db.product.findMany()
}

// Remote variant (16.2+) — always served from the edge/CDN, never rendered
// inline on the origin. Best for static product listings, marketing content.
async function MarketingHero() {
  'use cache: remote'
  cacheLife('days')
  return <Hero />
}

// Private variant (16.2+) — cached per-user session. Never shared across
// users. Use for personalized dashboards with expensive computation.
async function UserDashboard({ userId }: { userId: string }) {
  'use cache: private'
  cacheLife('minutes')
  cacheTag(`user:${userId}`)
  return await loadDashboard(userId)
}

// Invalidate cache — v16 requires a cacheLife profile as the 2nd arg
import { revalidateTag } from 'next/cache'
revalidateTag('products', 'max') // or updateTag('products') for read-your-writes