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README.md

React Frontend Developer Agent — Panduan Lengkap

Dokumentasi lengkap untuk React Frontend Developer Agent (@frontend-react).

Daftar Isi

Tentang Agent

React Frontend Developer Agent adalah subagent spesialis untuk pengembangan frontend menggunakan React.js / Next.js / Vite. Agent ini dipanggil oleh IT Leader (leader) ketika project membutuhkan frontend berbasis React.

Stack utama:

  • React 19 + TypeScript strict
  • Next.js 15 (App Router) — Server Components, Server Actions, Route Handlers
  • Vite + React plugin
  • Tailwind CSS v4
  • shadcn/ui component library
  • TanStack Query (data fetching)
  • Zustand (state management)
  • React Hook Form + Zod (form validation)
  • Framer Motion (animations)

Cara Aktivasi

Via IT Leader (Recommended)

IT Leader akan otomatis mendelegasikan task ke @frontend-react ketika project menggunakan React/Next.js.

Manual

@frontend-react [deskripsi task]

Skills

Auto-loaded Skills

Setiap session, agent akan load:

  1. coding-standards — Universal coding standards
  2. frontend-patterns — React/Next.js patterns
  3. impeccable — Impeccable design intelligence
  4. web-design-guidelines — UI/UX compliance

Contextual Skills (load sesuai kebutuhan)

  • shadcn-ui — shadcn/ui components
  • vercel-react-best-practices — React performance optimization
  • vercel-composition-patterns — Component composition patterns
  • building-components — Component library creation
  • security-review — Auth/user input security
  • tdd-workflow — Test-driven development

Contoh Penggunaan

1. Build Component

@frontend-react Buat ProductCard component:
- Props: product (name, price, image, rating)
- Variants: default, loading, error
- Responsive: mobile-first
- Animasi: hover scale
- Accessibility: ARIA labels

2. Setup Data Fetching

@frontend-react Setup TanStack Query untuk products page:
- GET /api/products — list with pagination
- GET /api/products/[id] — single product
- POST /api/products — create
- Handle loading, error, empty states

3. Implement Form

@frontend-react Buat CreateProduct form:
- Fields: name, description, price, category
- Validation: Zod schema
- Submit: Server Action
- States: idle, submitting, success, error

4. Server Component

@frontend-react Buat ProductList sebagai Server Component:
- Fetch langsung dari database
- Search params untuk filter
- Streaming dengan Suspense
- Revalidation periodik

5. Performance Optimization

@frontend-react Load `vercel-react-best-practices` dan audit:
- Bundle size
- Re-render patterns
- Image optimization
- Code splitting

Tips & Best Practices

Server Components First

Gunakan Server Components secara default. Tambah 'use client' hanya ketika membutuhkan:

  • Browser APIs (localStorage, event handlers)
  • useState / useEffect
  • onClick / onChange
  • Custom hooks dengan browser APIs

Data Fetching

  • Server Components: fetch() langsung dengan next.revalidate
  • Client Components: TanStack Query untuk caching & refetch
  • Mutations: Server Actions (Next.js) atau TanStack Query mutations

State Management

  • Server State: Server Components + TanStack Query
  • Client State: Zustand untuk global state
  • Form State: React Hook Form
  • URL State: useSearchParams / useParams

Component Patterns

  • Gunakan shadcn/ui components sebagai base
  • Custom components via composition
  • Props interface dengan TypeScript strict
  • Gunakan React.memo hanya untuk expensive renders

Accessibility

  • Semantic HTML elements
  • ARIA labels untuk interactive elements
  • Keyboard navigation
  • Color contrast WCAG 2.1 AA
  • Focus management untuk modals

Referensi Lanjutan

Dokumen Deskripsi
QUICK_START.md Mulai dalam 5 menit
CHEATSHEET.md Quick commands reference
API_PATTERNS.md Data fetching patterns
INDEX.md Full documentation index