feat: biblioteca inteligente libs/ + 5 novas skills (20 skills total)

NOVAS SKILLS:
- next-best-practices      v0.1.0  (CLEAN) — Next.js App Router, RSC, caching, data
- nextjs-patterns          v1.0.0  (CLEAN) — Next.js 15: Server Actions, route handlers
- vite                     v1.0.0  (CLEAN) — env vars, aliases, proxy, CJS compat
- uncle-bob                v1.0.0  (CLEAN) — Clean Code, SOLID, Clean Architecture
- clean-code-review        v1.0.0  (CLEAN) — naming, guard clauses, anti-patterns, refactoring
- vue                      v1.0.0  (CLEAN) — Vue framework
- vue-composition-api-best-practices v1.0.0 (CLEAN) — composables, Pinia, reactivity

BIBLIOTECA INTELIGENTE libs/ (10 dominios, 11 arquivos):
- typescript/ — TS safe + generics gotchas
- react/ — Next.js App Router + Vite config
- vue/ — Composition API + Pinia
- linux/ — System diagnostic cheatsheet
- database/ — PostgreSQL + MySQL patterns
- browser/ — Chromium CLI + E2E testing
- security/ — SAST audit (OWASP Top 10)
- best-practices/ — Clean Code + SOLID + Clean Architecture
- deploy/ — Docker multi-stack + OpenClaw ops
- + INDEX.md como guia de navegacao

.learnings/ — LRN-20260519-003 criado (biblioteca compartilhada)

skills/next-best-practices/directives.md

@@ -0,0 +1,73 @@
+# Directives
+
+## React Directives
+
+These are React directives, not Next.js specific.
+
+### `'use client'`
+
+Marks a component as a Client Component. Required for:
+- React hooks (`useState`, `useEffect`, etc.)
+- Event handlers (`onClick`, `onChange`)
+- Browser APIs (`window`, `localStorage`)
+
+```tsx
+'use client'
+
+import { useState } from 'react'
+
+export function Counter() {
+  const [count, setCount] = useState(0)
+  return <button onClick={() => setCount(count + 1)}>{count}</button>
+}
+```
+
+Reference: https://react.dev/reference/rsc/use-client
+
+### `'use server'`
+
+Marks a function as a Server Action. Can be passed to Client Components.
+
+```tsx
+'use server'
+
+export async function submitForm(formData: FormData) {
+  // Runs on server
+}
+```
+
+Or inline within a Server Component:
+
+```tsx
+export default function Page() {
+  async function submit() {
+    'use server'
+    // Runs on server
+  }
+  return <form action={submit}>...</form>
+}
+```
+
+Reference: https://react.dev/reference/rsc/use-server
+
+---
+
+## Next.js Directive
+
+### `'use cache'`
+
+Marks a function or component for caching. Part of Next.js Cache Components.
+
+```tsx
+'use cache'
+
+export async function getCachedData() {
+  return await fetchData()
+}
+```
+
+Requires `cacheComponents: true` in `next.config.ts`.
+
+For detailed usage including cache profiles, `cacheLife()`, `cacheTag()`, and `updateTag()`, see the `next-cache-components` skill.
+
+Reference: https://nextjs.org/docs/app/api-reference/directives/use-cache