# 🗺️ Next.js Monorepo Development Roadmap

**Project Type**: Full-Stack Monorepo
**Framework**: Next.js 14+ (App Router)
**Architecture**: Monorepo with shared packages
**Framework Version**: VERSATIL SDLC v6.4.0

---

## 🤖 Recommended OPERA Agents

### Critical Agents (Primary Development)

- **James-Frontend** `.claude/agents/james-frontend.md`
  UI/UX development, component architecture, and accessibility

- **James-React** `.claude/agents/sub-agents/james-frontend/james-react.md`
  React Server Components, hooks, and performance optimization

- **James-NextJS** `.claude/agents/sub-agents/james-frontend/james-nextjs.md`
  Next.js-specific patterns, App Router, SSR/SSG optimization, Edge functions

- **Marcus-Backend** `.claude/agents/marcus-backend.md`
  API architecture, serverless functions, security

- **Marcus-Node** `.claude/agents/sub-agents/marcus-backend/marcus-node-backend.md`
  Node.js runtime optimization, API routes, middleware

- **Maria-QA** `.claude/agents/maria-qa.md`
  Quality assurance, test automation, monorepo testing strategy

### Recommended Agents (Enhanced Workflow)

- **Alex-BA** `.claude/agents/alex-ba.md`
  Requirements analysis, user stories, feature decomposition

- **Sarah-PM** `.claude/agents/sarah-pm.md`
  Project coordination, sprint management, documentation

---

## 📅 4-Week Development Plan

### Week 1: Monorepo Foundation & Architecture

**Description**: Set up Next.js monorepo with Turborepo/pnpm workspaces, shared packages, and tooling

**Primary Agents**: Alex-BA, Sarah-PM, James-NextJS, Marcus-Node

**Tasks**:
- [ ] Requirements analysis with Alex-BA (app architecture, package structure)
- [ ] Initialize Next.js 14+ with App Router
- [ ] Set up monorepo structure (Turborepo or pnpm workspaces)
- [ ] Create shared packages:
  - `@repo/ui` - Shared UI components
  - `@repo/utils` - Shared utilities
  - `@repo/config` - Shared configs (ESLint, TypeScript, Tailwind)
  - `@repo/types` - Shared TypeScript types
- [ ] Configure TypeScript with project references
- [ ] Set up ESLint, Prettier, and Husky
- [ ] Configure Tailwind CSS with shared design tokens
- [ ] Set up environment variables management (Turborepo env handling)
- [ ] Configure Git workflow (branching, PR templates)
- [ ] Set up CI/CD pipeline (Vercel or GitHub Actions)
- [ ] Configure database (Prisma with PostgreSQL or PlanetScale)

**Quality Gates**:
- ✅ All developers can run monorepo locally
- ✅ Shared packages build successfully
- ✅ Linting enforced across all packages
- ✅ CI pipeline validates all packages

**Estimated Effort**: 40-50 hours

---

### Week 2: Core Application Development

**Description**: Implement core features with Next.js App Router, API routes, and shared components

**Primary Agents**: James-NextJS, Marcus-Node, Maria-QA

**Frontend Tasks (Next.js App Router)**:
- [ ] Create shared UI component library (`@repo/ui`)
  - Button, Input, Card, Modal, Toast, etc.
  - Dark mode support with next-themes
  - Responsive design patterns
- [ ] Implement authentication:
  - NextAuth.js or Clerk integration
  - Auth middleware for protected routes
  - Session management (edge-compatible)
- [ ] Create page layouts with App Router:
  - Root layout with shared navigation
  - Nested layouts for different sections
  - Loading and error states
- [ ] Implement data fetching patterns:
  - Server Components for data fetching
  - Client Components for interactivity
  - Streaming with Suspense boundaries
- [ ] Set up routing and navigation:
  - Parallel routes for modals/drawers
  - Intercepting routes
  - Route groups for organization

**Backend Tasks (API Routes + Server Actions)**:
- [ ] Implement API routes in `app/api/`:
  - RESTful endpoints for CRUD operations
  - Type-safe with Zod validation
  - Error handling middleware
- [ ] Create Server Actions for mutations:
  - Form submissions with progressive enhancement
  - Optimistic UI updates
  - Input validation with Zod
- [ ] Set up database with Prisma:
  - Schema design
  - Migrations
  - Seed scripts
  - Type-safe client
- [ ] Implement caching strategies:
  - React Cache for request deduplication
  - Next.js revalidation (ISR)
  - Edge caching with CDN

**Testing**:
- [ ] Unit tests for utilities and components (Vitest)
- [ ] Integration tests for API routes (Playwright)
- [ ] Test coverage >= 80%

**Quality Gates**:
- ✅ Authentication working end-to-end
- ✅ Server/Client Components properly separated
- ✅ All API routes type-safe and validated
- ✅ Accessibility (axe-core) passing
- ✅ Unit tests >= 80% coverage
- ✅ No critical security vulnerabilities

**Estimated Effort**: 60-80 hours

---

### Week 3: Advanced Features, Optimization & Testing

**Description**: Advanced Next.js features, performance optimization, comprehensive testing

**Primary Agents**: Maria-QA, James-NextJS, Marcus-Node

**Advanced Features**:
- [ ] Implement Edge Runtime features:
  - Edge API routes for low-latency
  - Edge middleware for auth/redirects
  - Streaming responses
- [ ] Set up Incremental Static Regeneration (ISR):
  - On-demand revalidation
  - Time-based revalidation
  - Cache tags for granular invalidation
- [ ] Implement image optimization:
  - next/image with responsive images
  - Lazy loading and blur placeholders
  - Custom loader for CDN integration
- [ ] Add internationalization (i18n):
  - next-intl or next-i18next
  - Server-side translations
  - Dynamic locale switching
- [ ] Implement search functionality:
  - Full-text search with Postgres
  - Client-side filtering and sorting
  - Debounced search inputs

**Performance Optimization**:
- [ ] Code splitting and lazy loading
- [ ] Bundle analysis (next-bundle-analyzer)
- [ ] Font optimization (next/font)
- [ ] Third-party script optimization (next/script)
- [ ] Database query optimization (Prisma query analysis)
- [ ] React Server Components optimization
- [ ] Parallel data fetching patterns
- [ ] Prefetching critical routes

**Testing Strategy**:
- [ ] E2E testing with Playwright:
  - Critical user flows
  - Multi-page interactions
  - Authentication flows
- [ ] Visual regression testing (Percy or Chromatic)
- [ ] Performance testing (Lighthouse CI)
- [ ] Load testing (k6) for API routes
- [ ] Accessibility testing (axe-core automated + manual)

**Security Hardening**:
- [ ] OWASP Top 10 compliance
- [ ] Rate limiting (Upstash Redis + middleware)
- [ ] CSRF protection in Server Actions
- [ ] Content Security Policy (CSP)
- [ ] Security headers middleware
- [ ] Input sanitization (DOMPurify)
- [ ] SQL injection prevention (Prisma parameterized queries)

**Quality Gates**:
- ✅ All E2E tests passing
- ✅ Lighthouse score >= 95
- ✅ API response < 100ms (edge), < 200ms (serverless)
- ✅ First Contentful Paint < 1.2s
- ✅ Security scan passed
- ✅ WCAG 2.1 AA compliance

**Estimated Effort**: 60-80 hours

---

### Week 4: Polish, Observability & Deployment

**Description**: Final polish, monitoring, documentation, and production deployment to Vercel

**Primary Agents**: Sarah-PM, Maria-QA, James-NextJS, Marcus-Node

**Polish Tasks**:
- [ ] User acceptance testing (UAT)
- [ ] Bug triage and resolution
- [ ] UI polish (animations with Framer Motion)
- [ ] Error handling improvements
- [ ] Loading states and skeleton screens
- [ ] Toast notifications for user feedback

**Observability**:
- [ ] Set up error tracking (Sentry)
- [ ] Implement application monitoring:
  - Vercel Analytics for Web Vitals
  - Custom analytics events
  - Performance monitoring
- [ ] Add logging strategy:
  - Structured logs (pino)
  - Edge-compatible logging
  - Log aggregation (Axiom or Datadog)
- [ ] Create monitoring dashboards:
  - Web Vitals dashboard
  - API performance metrics
  - Error rate tracking
  - User engagement metrics

**Documentation**:
- [ ] Component documentation (Storybook with Next.js integration)
- [ ] API documentation (OpenAPI/Swagger for API routes)
- [ ] Monorepo structure documentation
- [ ] Developer onboarding guide
- [ ] Architecture decision records (ADRs)
- [ ] Deployment runbook

**Deployment to Vercel**:
- [ ] Configure Vercel project:
  - Framework preset (Next.js)
  - Environment variables
  - Build command overrides for monorepo
  - Edge config for middleware
- [ ] Set up preview deployments:
  - Automatic preview for PRs
  - Production branch protection
- [ ] Configure custom domain and SSL
- [ ] Set up database:
  - Connection pooling (PgBouncer)
  - Backup strategy
  - Migration workflow
- [ ] Configure CDN and caching:
  - Vercel Edge Network
  - Cache headers optimization
  - ISR configuration
- [ ] Post-deployment verification:
  - Smoke tests on production
  - Performance monitoring
  - Error tracking validation

**Quality Gates**:
- ✅ All production checklist completed
- ✅ UAT sign-off
- ✅ Documentation complete
- ✅ Monitoring operational
- ✅ Vercel deployment successful
- ✅ Zero critical/high issues

**Estimated Effort**: 50-60 hours

---

## 🎯 Quality Strategy

### Testing Approach
- **Unit Tests**: Vitest for utilities and hooks
- **Component Tests**: Vitest + React Testing Library
- **Integration Tests**: Playwright for API routes
- **E2E Tests**: Playwright for critical flows
- **Visual Regression**: Percy or Chromatic
- **Performance Tests**: Lighthouse CI (target >= 95)

### Code Quality
- **Linting**: ESLint with Next.js recommended config
- **Formatting**: Prettier with Tailwind plugin
- **Type Safety**: TypeScript strict mode
- **Code Review**: Maria-QA reviews all PRs
- **Test Coverage**: >= 80% for new code
- **Monorepo Validation**: Turborepo caching and remote cache

### Performance Standards
- **Lighthouse**: >= 95 (all metrics)
- **First Contentful Paint**: < 1.2s
- **Largest Contentful Paint**: < 2.5s
- **Time to Interactive**: < 3.0s
- **Cumulative Layout Shift**: < 0.1
- **API Response**: < 100ms (edge), < 200ms (serverless)

### Security Standards
- **OWASP Top 10**: Full compliance
- **Dependency Scanning**: npm audit + Snyk
- **Authentication**: Secure session handling
- **Authorization**: Middleware-based protection
- **CSP**: Strict Content Security Policy

### Accessibility Standards
- **WCAG 2.1 AA**: Target 100%
- **Keyboard Navigation**: Full support
- **Screen Reader**: ARIA best practices
- **Color Contrast**: >= 4.5:1
- **Focus Management**: Visible focus indicators

---

## 🚀 Deployment Checklist (Vercel)

### Pre-Deployment
- ✅ All tests passing (unit, integration, E2E)
- ✅ Code coverage >= 80%
- ✅ No high/critical vulnerabilities
- ✅ Lighthouse >= 95
- ✅ WCAG 2.1 AA passed
- ✅ Bundle size optimized
- ✅ Database migrations ready

### Vercel Configuration
- ✅ Environment variables set (production)
- ✅ Build command configured for monorepo
- ✅ Edge config enabled
- ✅ Custom domain configured
- ✅ SSL certificates active
- ✅ Preview deployments enabled
- ✅ Production branch protected

### Database & Infrastructure
- ✅ Database connection pooling enabled
- ✅ Database backups automated
- ✅ Redis cache configured (Upstash)
- ✅ File storage configured (Vercel Blob or S3)

### Monitoring & Observability
- ✅ Vercel Analytics enabled
- ✅ Sentry error tracking configured
- ✅ Web Vitals monitoring active
- ✅ Custom analytics events tracked
- ✅ Alerting rules configured

### Post-Deployment
- ✅ Smoke tests passed
- ✅ Performance baseline recorded
- ✅ Monitoring dashboards reviewed
- ✅ User communication sent
- ✅ Rollback procedure validated

---

## 💡 Technology Stack Recommendations

### Core Framework
- **Framework**: Next.js 14+ (App Router)
- **Runtime**: Node.js 20+ and Edge Runtime
- **TypeScript**: 5.0+ with strict mode
- **Monorepo Tool**: Turborepo or pnpm workspaces

### Frontend
- **UI Library**: React 18+ (Server Components)
- **Styling**: Tailwind CSS with shadcn/ui
- **Forms**: React Hook Form + Zod
- **State Management**: Zustand or Jotai (minimal client state)
- **Animations**: Framer Motion
- **Icons**: Lucide React or Heroicons

### Backend
- **API**: Next.js API routes + Server Actions
- **Database**: PostgreSQL with Prisma ORM
- **Authentication**: NextAuth.js or Clerk
- **Validation**: Zod for type-safe schemas
- **Caching**: Redis (Upstash) + React Cache
- **File Storage**: Vercel Blob or AWS S3

### Testing & Quality
- **Unit/Integration**: Vitest
- **E2E**: Playwright
- **Visual Regression**: Chromatic
- **Performance**: Lighthouse CI
- **Accessibility**: axe-core + @axe-core/playwright

### DevOps & Hosting
- **Hosting**: Vercel (recommended for Next.js)
- **Database Hosting**: Vercel Postgres, PlanetScale, or Supabase
- **Monitoring**: Vercel Analytics + Sentry
- **CDN**: Vercel Edge Network
- **CI/CD**: GitHub Actions + Vercel Git Integration

---

## 📊 Monorepo Structure

```
my-nextjs-monorepo/
├── apps/
│   ├── web/                 # Main Next.js application
│   │   ├── app/             # App Router pages
│   │   ├── components/      # App-specific components
│   │   ├── lib/             # App-specific utilities
│   │   └── public/          # Static assets
│   └── docs/                # Documentation site (optional)
├── packages/
│   ├── ui/                  # Shared UI components
│   │   ├── src/
│   │   ├── tsconfig.json
│   │   └── package.json
│   ├── utils/               # Shared utilities
│   ├── config/              # Shared configs
│   │   ├── eslint/
│   │   ├── tailwind/
│   │   └── typescript/
│   ├── types/               # Shared TypeScript types
│   └── database/            # Prisma client and migrations
├── turbo.json               # Turborepo configuration
├── package.json             # Root package.json
└── pnpm-workspace.yaml      # pnpm workspaces config
```

---

## 🔗 Related Resources

- **Next.js Documentation**: [nextjs.org/docs](https://nextjs.org/docs)
- **Turborepo Documentation**: [turbo.build/repo/docs](https://turbo.build/repo/docs)
- **Vercel Deployment**: [vercel.com/docs](https://vercel.com/docs)
- **React Server Components**: [react.dev/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023](https://react.dev/blog/2023/03/22/react-labs-what-we-have-been-working-on-march-2023)
- **VERSATIL Framework**: `.claude/AGENTS.md`, `.claude/rules/README.md`

---

**🤖 Generated by VERSATIL SDLC Framework v6.4.0**
**Last Updated**: ${new Date().toISOString()}
