Expert guidance for Next.js Cache Components and Partial Prerendering (PPR). **PROACTIVE ACTIVATION**: Use this skill automatically when working in Next.js projects that have `cacheComponents: true` in their next.config.ts/next.config.js. When this config is detected, proactively apply Cache Components patterns and best practices to all React Server Component implementations. **DETECTION**: At the start of a session in a Next.js project, check for `cacheComponents: true` in next.config. If enabled, this skill's patterns should guide all component authoring, data fetching, and caching decisions. **USE CASES**: Implementing 'use cache' directive, configuring cache lifetimes with cacheLife(), tagging cached data with cacheTag(), invalidating caches with updateTag()/revalidateTag(), optimizing static vs dynamic content boundaries, debugging cache issues, and reviewing Cache Component implementations. --- # Next.js Cache Components > **Auto-activation**: This skill activates automatically in projects with `cacheComponents: true` in next.config. ## Project Detection When starting work in a Next.js project, check if Cache Components are enabled: ```bash # Check next.config.ts or next.config.js for cacheComponents grep -r "cacheComponents" next.config.* 2>/dev/null ``` If `cacheComponents: true` is found, apply this skill's patterns proactively when: - Writing React Server Components - Implementing data fetching - Creating Server Actions with mutations - Optimizing page performance - Reviewing existing component code Cache Components enable **Partial Prerendering (PPR)** - mixing static HTML shells with dynamic streaming content for optimal performance. ## Philosophy: Code Over Configuration Cache Components represents a shift from **segment configuration** to **compositional code**: | Before (Deprecated) | After (Cache Components) | | --------------------------------------- | ----------------------------------------- | | `export const r
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