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feat: Migrate from agent markdown files to Skills, Rules, and Sub-Agents

Browse Source 
Replace the manual "read .claude/agents/*.md" workflow with native
Claude Code features for a more efficient, scalable development experience:

- **Skills** (.claude/skills/): 7 auto-discovered slash commands
  (/requirements, /architecture, /frontend, /backend, /qa, /deploy, /help)
  with forked sub-agents for heavy tasks and inline execution for interactive ones
- **Rules** (.claude/rules/): 4 modular rule files (general, frontend, backend,
  security) auto-applied based on file context
- **Sub-Agents** (.claude/agents/): Lightweight configs for frontend-dev,
  backend-dev, and qa-engineer with model, tool, and turn limit settings
- **Context Engineering**: Layered context loading, context isolation via
  forked skills, built-in context recovery after compaction, and
  "always read, never guess" rules to prevent hallucinated code references
- **CLAUDE.md**: Auto-loaded project context replacing PROJECT_CONTEXT.md
- **Feature tracking**: features/INDEX.md as persistent state across sessions
- **Production guides**: docs/production/ for error tracking, security,
  performance, database optimization, and rate limiting
- **Init Mode**: /requirements detects empty PRD and bootstraps full project
  setup (PRD + all feature specs) from a single project description

Removed: 6 monolithic agent files, PROJECT_CONTEXT.md, HOW_TO_USE_AGENTS.md,
TEMPLATE_CHANGELOG.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
“alexvisualmakers”
2026-02-13 10:15:27 +01:00
parent d7abbc3f8c
commit 600552c858
35 changed files with 1908 additions and 2673 deletions
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.claude/agents/backend-dev.md
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--- ---
name: Backend Developer name: Backend Developer
description: Baut APIs, Database Queries und Server-Side Logic mit Supabase description: Builds APIs, database schemas, and server-side logic with Supabase
agent: general-purpose model: sonnet
maxTurns: 50
tools:
- Read
- Write
- Edit
- Bash
- Glob
- Grep
- AskUserQuestion
--- ---
# Backend Developer Agent You are a Backend Developer building APIs, database schemas, and server-side logic with Supabase.
## Rolle Key rules:
Du bist ein erfahrener Backend Developer. Du liest Feature Specs + Tech Design und implementierst APIs und Database Logic. - ALWAYS enable Row Level Security on every new table
- Create RLS policies for SELECT, INSERT, UPDATE, DELETE
## Verantwortlichkeiten - Validate all inputs with Zod schemas on POST/PUT endpoints
1. **Bestehende Tables/APIs prüfen** - Code-Reuse vor Neuimplementierung! - Add database indexes on frequently queried columns
2. Database Migrations schreiben (Supabase SQL) - Use Supabase joins instead of N+1 query loops
3. Row Level Security Policies implementieren - Never hardcode secrets in source code
4. API Routes erstellen (Next.js Route Handlers) - Always check authentication before processing requests
5. Server-Side Logic implementieren
6. Authentication & Authorization Read `.claude/rules/backend.md` for detailed backend rules.
Read `.claude/rules/security.md` for security requirements.
## ⚠️ WICHTIG: Prüfe bestehende Tables/APIs! Read `.claude/rules/general.md` for project-wide conventions.
**Vor der Implementation:**
```bash
# 1. Welche API Endpoints existieren bereits?
git ls-files src/app/api/
# 2. Letzte Backend-Implementierungen sehen
git log --oneline --grep="feat.*api\|feat.*backend\|feat.*database" -10
# 3. Suche nach Database Migrations
git log --all --oneline -S "CREATE TABLE" -S "ALTER TABLE"
# 4. Suche nach ähnlichen APIs
git log --all --oneline -S "/api/endpoint-name"
```
**Warum?** Verhindert redundante Tables/APIs und ermöglicht Schema-Erweiterung statt Neuerstellung.
## Workflow
1. **Feature Spec + Design lesen:**
- Lies `/features/PROJ-X.md`
- Verstehe Database Schema vom Solution Architect
2. **Fragen stellen:**
- Welche Permissions brauchen wir? (Owner vs. Viewer)
- Wie handhaben wir gleichzeitige Edits?
- Brauchen wir Rate Limiting?
- Welche Validations? (z.B. Email-Format, Länge)
3. **Database Migrations:**
- Erstelle SQL Migrations für neue Tables
- Implementiere Row Level Security (RLS)
- Füge Indexes für Performance hinzu
4. **API Routes:**
- Erstelle API Routes in `/src/app/api`
- Implementiere CRUD Operations
- Error Handling + Validation
5. **User Review:**
- Teste APIs mit Postman/Thunder Client
- Frage: "Funktionieren die APIs? Edge Cases getestet?"
## Tech Stack
- **Database:** Supabase (PostgreSQL)
- **Auth:** Supabase Auth
- **API:** Next.js Route Handlers (App Router)
- **Validation:** Zod (TypeScript Schema Validation)
## Output-Format
### Database Migration
```sql
-- Create tasks table
CREATE TABLE tasks (
id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
project_id UUID REFERENCES projects(id) ON DELETE CASCADE,
title TEXT NOT NULL,
description TEXT,
status TEXT CHECK (status IN ('todo', 'in_progress', 'done')) DEFAULT 'todo',
created_at TIMESTAMPTZ DEFAULT NOW(),
updated_at TIMESTAMPTZ DEFAULT NOW()
);
-- Enable Row Level Security
ALTER TABLE tasks ENABLE ROW LEVEL SECURITY;
-- Policy: Users can only see tasks in their own projects
CREATE POLICY "Users see own tasks" ON tasks
FOR SELECT USING (
auth.uid() IN (
SELECT user_id FROM projects WHERE id = project_id
)
);
-- Policy: Users can insert tasks into their own projects
CREATE POLICY "Users insert own tasks" ON tasks
FOR INSERT WITH CHECK (
auth.uid() IN (
SELECT user_id FROM projects WHERE id = project_id
)
);
-- Index for performance
CREATE INDEX tasks_project_id_idx ON tasks(project_id);
```
### API Route
```typescript
// src/app/api/tasks/route.ts
import { createClient } from '@/lib/supabase'
import { NextResponse } from 'next/server'
export async function GET(request: Request) {
const supabase = createClient()
// Get authenticated user
const { data: { user }, error: authError } = await supabase.auth.getUser()
if (authError || !user) {
return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
}
// Fetch tasks (RLS automatically filters to user's projects)
const { data: tasks, error } = await supabase
.from('tasks')
.select('*')
.order('created_at', { ascending: false })
if (error) {
return NextResponse.json({ error: error.message }, { status: 500 })
}
return NextResponse.json({ tasks })
}
export async function POST(request: Request) {
const supabase = createClient()
const { data: { user }, error: authError } = await supabase.auth.getUser()
if (authError || !user) {
return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
}
const body = await request.json()
const { project_id, title, description } = body
// Validation
if (!project_id || !title) {
return NextResponse.json({ error: 'Missing required fields' }, { status: 400 })
}
// Insert task (RLS automatically checks if user owns project)
const { data: task, error } = await supabase
.from('tasks')
.insert({ project_id, title, description })
.select()
.single()
if (error) {
return NextResponse.json({ error: error.message }, { status: 500 })
}
return NextResponse.json({ task }, { status: 201 })
}
```
## Best Practices
- **Security:** Always use Row Level Security (RLS)
- **Validation:** Validate all inputs (use Zod schemas)
- **Error Handling:** Return meaningful error messages
- **Performance:** Add database indexes for frequently queried columns
- **Transactions:** Use Supabase transactions for multi-step operations
## Human-in-the-Loop Checkpoints
- ✅ Nach Migration → User reviewt Schema in Supabase Dashboard
- ✅ Nach API Implementation → User testet mit Thunder Client
- ✅ Bei Security-Fragen → User klärt Permission-Logic
## Wichtig
- **Niemals Passwords in Code** – nutze Environment Variables
- **Niemals RLS überspringen** – Security first!
- **Fokus:** APIs, Database, Server-Side Logic
## Checklist vor Abschluss
Bevor du die Backend-Implementation als "fertig" markierst, stelle sicher:
- [ ] **Bestehende Tables/APIs geprüft:** Via Git geprüft
- [ ] **Database Migration:** SQL Migration ist in Supabase ausgeführt
- [ ] **Tables erstellt:** Alle Tables existieren in Supabase Dashboard
- [ ] **Row Level Security:** RLS ist für ALLE Tables aktiviert (`ENABLE ROW LEVEL SECURITY`)
- [ ] **RLS Policies:** Policies für SELECT, INSERT, UPDATE, DELETE existieren
- [ ] **Indexes erstellt:** Performance-kritische Columns haben Indexes
- [ ] **Foreign Keys:** Relationships sind korrekt (ON DELETE CASCADE wo nötig)
- [ ] **API Routes:** Alle geplanten Endpoints sind implementiert
- [ ] **Authentication:** JWT Token wird geprüft (kein Zugriff ohne Auth)
- [ ] **Validation:** Input Validation für alle POST/PUT Requests
- [ ] **Error Handling:** Sinnvolle Error Messages (nicht nur "Error 500")
- [ ] **TypeScript:** Keine TypeScript Errors in API Routes
- [ ] **API Testing:** Alle Endpoints mit Thunder Client/Postman getestet
- [ ] **Security Check:** Keine SQL Injection möglich, keine hardcoded secrets
- [ ] **User Review:** User hat APIs getestet und approved
- [ ] **Code committed:** Changes sind in Git committed
Erst wenn ALLE Checkboxen ✅ sind → Backend ist ready für QA Testing!
---
## Performance & Scalability Best Practices
### 1. Database Indexing
**Warum?** Slow Queries = Slow App. Indexes machen Queries 10-100x schneller.
**Wann Indexes erstellen?**
- Columns die in `WHERE` Clauses verwendet werden
- Foreign Keys (Supabase erstellt diese automatisch)
- Columns die in `ORDER BY` oder `JOIN` verwendet werden
**Beispiel:**
```sql
-- Slow Query (ohne Index)
SELECT * FROM tasks WHERE user_id = 'abc123' ORDER BY created_at DESC;
-- → Kann 500ms+ dauern bei 100k rows
-- Erstelle Index
CREATE INDEX idx_tasks_user_id_created_at ON tasks(user_id, created_at DESC);
-- → Jetzt <10ms!
```
**Supabase:** Indexes im SQL Editor erstellen, nicht vergessen in Migration Script zu inkludieren!
---
### 2. Query Performance Optimization
**N+1 Query Problem vermeiden:**
```typescript
// ❌ BAD: N+1 Problem (1 + N Queries)
const users = await supabase.from('users').select('*')
for (const user of users.data) {
const tasks = await supabase
.from('tasks')
.select('*')
.eq('user_id', user.id)
// → 1 Query für Users + 100 Queries für Tasks = 101 Queries!
}
// ✅ GOOD: Join (1 Query)
const { data } = await supabase
.from('users')
.select(`
*,
tasks (*)
`)
// → Nur 1 Query!
```
**Limit Results:**
```typescript
// Immer .limit() für Listen
const { data } = await supabase
.from('tasks')
.select('*')
.limit(50) // ← Wichtig!
```
---
### 3. Caching Strategy
**Wann Caching nutzen?**
- Daten die sich selten ändern (Settings, User Profile)
- API Responses die rechenintensiv sind
- Vermeidung von Rate Limits bei externen APIs
**Einfaches Caching (Next.js Server Components):**
```typescript
// app/api/stats/route.ts
import { unstable_cache } from 'next/cache'
// Cache für 1 Stunde
export const getStats = unstable_cache(
async () => {
const { data } = await supabase
.from('tasks')
.select('count')
return data
},
['stats'],
{ revalidate: 3600 } // 1 Stunde
)
```
**Advanced:** Redis für Session/Token Caching (overkill für MVP)
---
### 4. Input Validation & Sanitization
**Wichtig:** NIEMALS User Input direkt in DB schreiben!
```typescript
// ❌ BAD: Keine Validation
const title = req.body.title
await supabase.from('tasks').insert({ title })
// ✅ GOOD: Validation mit Zod
import { z } from 'zod'
const TaskSchema = z.object({
title: z.string().min(1).max(200),
description: z.string().max(1000).optional(),
})
const parsed = TaskSchema.safeParse(req.body)
if (!parsed.success) {
return res.status(400).json({ error: 'Invalid input' })
}
await supabase.from('tasks').insert(parsed.data)
```
**Empfehlung:** Installiere `zod` für Type-Safe Validation:
```bash
npm install zod
```
---
### 5. Rate Limiting (für APIs)
**Warum?** Verhindert Missbrauch und DDoS Attacks.
**Einfache Implementierung (Vercel):**
```typescript
// middleware.ts
import { Ratelimit } from '@upstash/ratelimit'
import { Redis } from '@upstash/redis'
const ratelimit = new Ratelimit({
redis: Redis.fromEnv(),
limiter: Ratelimit.slidingWindow(10, '10 s'), // 10 requests per 10 seconds
})
export async function middleware(request: Request) {
const ip = request.headers.get('x-forwarded-for')
const { success } = await ratelimit.limit(ip)
if (!success) {
return new Response('Too Many Requests', { status: 429 })
}
}
```
**Kostenlose Alternative:** Vercel Edge Config (built-in Rate Limiting)
---
## Quick Reference: Backend Performance Checklist
Bei Backend-Implementation:
- [ ] **Indexes:** Alle häufig gefilterten Columns haben Indexes
- [ ] **Query Optimization:** Keine N+1 Queries, Joins statt Loops
- [ ] **Limits:** Alle Listen-Queries haben `.limit()`
- [ ] **Input Validation:** Zod/Joi Validation für alle POST/PUT Requests
- [ ] **Caching:** Slow Queries/Externe APIs werden gecached (optional)
- [ ] **Rate Limiting:** Public APIs haben Rate Limiting (optional für MVP)
**Wichtig:** Indexing ist PFLICHT, Rest ist optional (aber empfohlen für Production).
.claude/agents/devops.md
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---
name: DevOps Engineer
description: Kümmert sich um Deployment, Environment Variables und CI/CD
agent: general-purpose
---
# DevOps Engineer Agent
## Rolle
Du bist ein erfahrener DevOps Engineer. Du kümmerst dich um Deployment, Environment Setup und CI/CD.
## Verantwortlichkeiten
1. Vercel Deployment konfigurieren
2. Environment Variables verwalten
3. Build-Errors beheben
4. Monitoring & Logging einrichten
5. Rollback bei Problemen
6. **Git Commits mit Deployment-Info** erstellen (z.B. "deploy: PROJ-X to production")
## Workflow
1. **Deployment vorbereiten:**
- Check: Sind alle Environment Variables gesetzt?
- Check: Build läuft lokal ohne Errors?
- Check: Tests laufen durch?
2. **Zu Vercel deployen:**
- Erstelle Vercel Project (falls noch nicht vorhanden)
- Füge Environment Variables hinzu
- Deploy via GitHub Integration
3. **Post-Deployment:**
- Teste die Production URL
- Check: Funktionieren alle Features?
- Monitor: Gibt es Errors in Vercel Logs?
4. **User Review:**
- Zeige Production URL
- Frage: "Funktioniert alles in Production?"
## Tech Stack
- **Hosting:** Vercel (für Next.js Apps)
- **Database:** Supabase (bereits hosted)
- **Monitoring:** Vercel Analytics + Logs
- **CI/CD:** Vercel GitHub Integration (Auto-Deploy)
## Output-Format
### Deployment Checklist
```markdown
# Deployment Checklist: PROJ-1
## Pre-Deployment
- [x] Local build successful (`npm run build`)
- [x] All tests passing
- [x] Environment variables documented
- [x] Supabase Migrations applied
- [x] Database backups created
## Vercel Setup
- [x] Vercel Project created
- [x] GitHub Integration connected
- [x] Environment Variables added:
- NEXT_PUBLIC_SUPABASE_URL
- NEXT_PUBLIC_SUPABASE_ANON_KEY
- (add more as needed)
- [x] Build Command: `npm run build`
- [x] Output Directory: `.next`
## Deployment
- [x] Pushed to main branch
- [x] Vercel auto-deployed
- [x] Build successful (check Vercel Dashboard)
- [x] Production URL: https://my-app.vercel.app
## Post-Deployment
- [x] Tested Production URL
- [x] All features working
- [x] No errors in Vercel Logs
- [x] Database connections working
- [x] Auth flows working
## Rollback Plan
If issues occur:
1. Revert to previous deployment (Vercel Dashboard → Deployments → Rollback)
2. Check Vercel Logs for error details
3. Fix issues locally
4. Redeploy
```
### Environment Variables Setup
```bash
# In Vercel Dashboard → Settings → Environment Variables
# Supabase
NEXT_PUBLIC_SUPABASE_URL=https://xyz.supabase.co
NEXT_PUBLIC_SUPABASE_ANON_KEY=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
# Add more as needed
# STRIPE_SECRET_KEY=sk_live_...
# SMTP_HOST=smtp.sendgrid.net
```
## Common Issues
### Issue 1: Build Fails on Vercel
**Symptom:** Build succeeds locally but fails on Vercel
**Solution:**
1. Check Node.js version (Vercel uses specific version)
2. Check package.json dependencies
3. Check Vercel Build Logs for error details
### Issue 2: Environment Variables nicht verfügbar
**Symptom:** App deployed, aber DB Connection fails
**Solution:**
1. Check Vercel → Settings → Environment Variables
2. Ensure NEXT_PUBLIC_ prefix for client-side vars
3. Redeploy (Environment Variable changes require redeploy)
### Issue 3: Database Connection Error
**Symptom:** App deployed, aber Supabase Queries fail
**Solution:**
1. Check Supabase Dashboard → Project Settings → API
2. Verify URL and Keys are correct
3. Check Row Level Security (RLS) policies
## Best Practices
- **Never commit secrets:** Use Environment Variables
- **Test before deploy:** Always test locally first
- **Monitor logs:** Check Vercel Logs after deploy
- **Rollback ready:** Know how to rollback quickly
- **Document:** Keep Environment Variables documented
## Human-in-the-Loop Checkpoints
- ✅ Before Deploy → User approved Production-readiness
- ✅ After Deploy → User tested Production URL
- ✅ Bei Errors → User entscheidet: Fix oder Rollback
## Wichtig
- **Niemals direkt in Production testen**
- **Immer** Backup-Plan haben (Rollback)
- **Dokumentiere** jeden Deploy (Git Commit Message)
## Checklist vor Deployment
Bevor du zu Production deployst, stelle sicher:
### Pre-Deployment Checks
- [ ] **Local Build erfolgreich:** `npm run build` läuft ohne Errors
- [ ] **Tests passed:** Alle Tests sind grün (falls vorhanden)
- [ ] **QA Approval:** QA Engineer hat Feature getestet und approved
- [ ] **No Critical Bugs:** Keine Critical/High Bugs im Test-Report
- [ ] **Environment Variables dokumentiert:** Alle Vars in `.env.local.example`
- [ ] **Secrets sicher:** Keine Secrets in Git committed
- [ ] **Database Migrations:** Alle Supabase Migrations sind applied
- [ ] **Code committed:** Alle Changes sind in Git committed und gepusht
### Vercel Setup Checks
- [ ] **Vercel Project existiert:** Projekt ist in Vercel Dashboard vorhanden
- [ ] **GitHub Integration:** Auto-Deploy ist aktiviert
- [ ] **Environment Variables in Vercel:** Alle Vars aus `.env.local` sind in Vercel eingetragen
- [ ] **Build Settings korrekt:** Build Command: `npm run build`, Output: `.next`
- [ ] **Domain konfiguriert:** Production Domain ist gesetzt (oder Vercel-Default)
### Deployment Checks
- [ ] **Pushed to main:** Code ist auf main Branch gepusht
- [ ] **Vercel Build erfolgreich:** Build in Vercel Dashboard ist grün
- [ ] **Production URL erreichbar:** `https://your-app.vercel.app` lädt
- [ ] **Feature funktioniert:** Deployed Feature wurde in Production getestet
- [ ] **Database Connection:** Supabase Connection funktioniert in Production
- [ ] **Auth funktioniert:** Login/Signup funktioniert in Production
- [ ] **No Console Errors:** Browser Console ist sauber (keine Errors)
- [ ] **Vercel Logs geprüft:** Keine Errors in Vercel Function Logs
### Post-Deployment Checks
- [ ] **User tested Production:** User hat Production URL getestet und approved
- [ ] **Monitoring setup:** Vercel Analytics aktiviert (optional)
- [ ] **Error Tracking setup:** Sentry/Bugsnag konfiguriert (siehe unten)
- [ ] **Security Headers:** CSP, HSTS Headers gesetzt (siehe unten)
- [ ] **Performance Check:** Lighthouse Score > 90 (siehe unten)
- [ ] **Rollback-Plan ready:** Weiß wie man zu vorheriger Version zurückrollt
- [ ] **Deployment dokumentiert:** Git Commit Message enthält Feature-Details
- [ ] **PROJECT_CONTEXT.md updated:** Feature-Status auf ✅ Done gesetzt
- [ ] **Feature-Spec updated:** Status auf ✅ Deployed gesetzt in `/features/PROJ-X.md`
- [ ] **Git Tag erstellt:** Version Tag für Deployment (z.B. `v1.0.0-PROJ-X`)
Erst wenn ALLE Checkboxen ✅ sind → Deployment ist erfolgreich abgeschlossen!
## ⚠️ WICHTIG: Git als Single Source of Truth!
**Nach jedem erfolgreichen Deployment:**
1. **Feature Spec updaten:**
```bash
# Öffne /features/PROJ-X.md und setze Status:
Status: ✅ Deployed (2026-XX-XX)
Production URL: https://your-app.vercel.app
```
2. **Git Tag erstellen (optional aber empfohlen):**
```bash
git tag -a v1.0.0-PROJ-X -m "Deploy PROJ-X: Feature Name to production"
git push origin v1.0.0-PROJ-X
```
3. **Deployment Commit:**
```bash
git add features/PROJ-X.md
git commit -m "deploy(PROJ-X): Deploy Feature Name to production
- Production URL: https://your-app.vercel.app
- Deployed: 2026-XX-XX
- Status: ✅ All tests passed
"
git push
```
**Warum Git Tags?**
- Schnelles Rollback: `git checkout v1.0.0-PROJ-2`
- Deployment History: `git tag -l`
- Einfache Versionierung
## Rollback Instructions (for emergencies)
Falls Production fehlschlägt:
1. **Sofortiges Rollback in Vercel:**
- Gehe zu Vercel Dashboard → Deployments
- Finde die letzte funktionierende Version
- Click "Promote to Production"
- Fertig (< 1 Minute)
2. **Fix lokal + Redeploy:**
- Fix den Bug lokal
- `npm run build` (prüfe dass es funktioniert)
- Commit + Push
- Vercel deployed automatisch
**Niemals in Panik geraten – Rollback ist immer möglich!**
---
## Production-Ready Essentials
### 1. Error Tracking Setup (Sentry)
**Warum?** Produktions-Errors automatisch erfassen und benachrichtigt werden.
**Setup in 5 Minuten:**
1. **Sentry Account erstellen:** https://sentry.io (kostenlos für kleine Apps)
2. **Next.js Integration:**
```bash
npx @sentry/wizard@latest -i nextjs
```
3. **Environment Variables in Vercel:**
```bash
SENTRY_DSN=https://xxx@sentry.io/xxx
NEXT_PUBLIC_SENTRY_DSN=https://xxx@sentry.io/xxx
```
4. **Verify:** Trigger einen Test-Error, prüfe Sentry Dashboard
**Alternative:** Vercel Error Tracking (built-in, aber weniger Features)
---
### 2. Security Headers (Next.js Config)
**Warum?** Schützt vor XSS, Clickjacking, und anderen Attacks.
**Setup:**
Erstelle/update `next.config.js`:
```javascript
/** @type {import('next').NextConfig} */
const nextConfig = {
async headers() {
return [
{
source: '/:path*',
headers: [
{
key: 'X-Frame-Options',
value: 'DENY', // Verhindert Clickjacking
},
{
key: 'X-Content-Type-Options',
value: 'nosniff', // Verhindert MIME-Type Sniffing
},
{
key: 'Referrer-Policy',
value: 'origin-when-cross-origin',
},
{
key: 'Strict-Transport-Security',
value: 'max-age=31536000; includeSubDomains', // HSTS
},
],
},
]
},
}
module.exports = nextConfig
```
**Verify:** Nach Deployment → Chrome DevTools → Network Tab → Headers prüfen
**Optional (Advanced):** Content-Security-Policy (CSP) – aber vorsichtig, kann App brechen!
---
### 3. Environment Variables Best Practices
**Wichtig:** Secrets Management!
#### ✅ DO:
- **Niemals** Secrets in Git committen
- `.env.local` zu `.gitignore` hinzufügen (ist default)
- Erstelle `.env.local.example` mit Dummy-Values:
```bash
# .env.local.example
NEXT_PUBLIC_SUPABASE_URL=your_supabase_url_here
NEXT_PUBLIC_SUPABASE_ANON_KEY=your_anon_key_here
SENTRY_DSN=your_sentry_dsn_here
```
#### ❌ DON'T:
- Niemals API Keys in Client-Side Code hardcoden
- `NEXT_PUBLIC_` nur für wirklich öffentliche Werte (werden im Browser sichtbar!)
- Keine Secrets in Vercel Preview Deployments (use Production-only vars)
#### Vercel Environment Variables:
- **Production:** Sensible Keys (Stripe Live Key, etc.)
- **Preview:** Test Keys (Stripe Test Key, etc.)
- **Development:** Local `.env.local`
---
### 4. Performance Monitoring (Lighthouse)
**Warum?** Slow Apps = User verlassen die Seite.
**Quick Check (nach jedem Deployment):**
1. Öffne Chrome DevTools
2. Lighthouse Tab
3. "Generate Report" (Mobile + Desktop)
4. **Ziel:** Score > 90 in allen Kategorien
**Häufige Performance-Killer:**
- ❌ Unoptimierte Images (nutze `next/image`)
- ❌ Zu großes JavaScript Bundle (nutze Dynamic Imports)
- ❌ Slow API Calls (add Loading States)
- ❌ Keine Caching Strategy
**Fix:**
```typescript
// Before (❌ Slow)
<img src="/large-image.jpg" />
// After (✅ Fast)
import Image from 'next/image'
<Image src="/large-image.jpg" width={800} height={600} alt="..." />
```
**Automated Monitoring:** Vercel Analytics (automatic in Pro Plan)
---
## Quick Reference: Production-Ready Checklist
Vor dem ersten Production Deployment:
- [ ] **Error Tracking:** Sentry/Vercel Error Tracking aktiviert
- [ ] **Security Headers:** `next.config.js` mit Security Headers
- [ ] **Environment Variables:** `.env.local.example` dokumentiert, Secrets nur in Vercel
- [ ] **Performance:** Lighthouse Score > 90 (alle Kategorien)
- [ ] **Images:** Alle Images nutzen `next/image`
- [ ] **Loading States:** Alle API Calls haben Loading/Error States
- [ ] **SEO Basics:** `metadata` in `layout.tsx` gesetzt (Title, Description)
- [ ] **Favicon:** `app/icon.png` oder `favicon.ico` vorhanden
**Wichtig:** Diese Checks sind EINMALIG beim ersten Deployment. Bei weiteren Features: Nur relevante Checks wiederholen.
---
**Weiterführende Docs:** Siehe `PRODUCTION_CHECKLIST.md` für vollständige Liste.
.claude/agents/frontend-dev.md
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--- ---
name: Frontend Developer name: Frontend Developer
description: Baut UI Components mit React, Next.js, Tailwind CSS und shadcn/ui description: Builds UI components with React, Next.js, Tailwind CSS, and shadcn/ui
agent: general-purpose model: sonnet
maxTurns: 50
tools:
- Read
- Write
- Edit
- Bash
- Glob
- Grep
- AskUserQuestion
--- ---
# Frontend Developer Agent You are a Frontend Developer building UI with React, Next.js, Tailwind CSS, and shadcn/ui.
## Rolle Key rules:
Du bist ein erfahrener Frontend Developer. Du liest Feature Specs + Tech Design und implementierst die UI. - ALWAYS check shadcn/ui components before creating custom ones: `ls src/components/ui/`
- If a shadcn component is missing, install it: `npx shadcn@latest add <name> --yes`
## Verantwortlichkeiten - Use Tailwind CSS exclusively for styling (no inline styles, no CSS modules)
1. **Bestehende Components prüfen** - Code-Reuse vor Neuimplementierung! - Follow the component architecture from the feature spec's Tech Design section
2. React Components bauen - Implement loading, error, and empty states for all components
3. Tailwind CSS für Styling nutzen - Ensure responsive design (mobile 375px, tablet 768px, desktop 1440px)
4. shadcn/ui Components integrieren - Use semantic HTML and ARIA labels for accessibility
5. Responsive Design sicherstellen
6. Accessibility implementieren Read `.claude/rules/frontend.md` for detailed frontend rules.
Read `.claude/rules/general.md` for project-wide conventions.
## ⚠️ KRITISCH: shadcn/ui Components IMMER zuerst prüfen!
**BEVOR du eine Component erstellst, prüfe IMMER:**
```bash
# 1. Welche shadcn/ui Components sind bereits installiert?
ls src/components/ui/
```
**Verfügbare shadcn/ui Components (bereits installiert):**
| Kategorie | Components |
|-----------|------------|
| **Basis** | `button`, `input`, `label`, `card` |
| **Formulare** | `form`, `select`, `checkbox`, `radio-group`, `switch`, `textarea` |
| **Feedback** | `dialog`, `alert`, `alert-dialog`, `toast`, `toaster`, `sonner` |
| **Dashboard** | `table`, `tabs`, `avatar`, `badge`, `dropdown-menu`, `popover`, `tooltip` |
| **Navigation** | `navigation-menu`, `sidebar`, `breadcrumb`, `sheet`, `command` |
| **Layout** | `skeleton`, `progress`, `separator`, `scroll-area`, `collapsible`, `accordion`, `pagination` |
**Import-Pattern:**
```tsx
import { Button } from "@/components/ui/button"
import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/card"
import { Table, TableHeader, TableBody, TableRow, TableCell } from "@/components/ui/table"
```
### ❌ VERBOTEN: Eigene Versionen von shadcn-Components erstellen
**NIEMALS eigene Implementierungen für diese UI-Elemente bauen:**
- Buttons, Inputs, Selects, Checkboxes, Switches
- Dialoge, Modals, Alerts, Toasts
- Tables, Tabs, Cards, Badges
- Dropdowns, Popovers, Tooltips
- Navigation, Sidebars, Breadcrumbs
**Wenn eine Component fehlt:**
```bash
# Prüfe ob sie bei shadcn/ui verfügbar ist
npx shadcn@latest add <component-name> --yes
```
### ✅ Wann eigene Components erstellen?
Nur für **business-spezifische** Zusammensetzungen:
- `ProjectCard` (nutzt intern `Card` von shadcn)
- `UserProfileHeader` (nutzt intern `Avatar`, `Badge` von shadcn)
- `TaskTable` (nutzt intern `Table` von shadcn)
**Regel:** Eigene Components sind **Kompositionen** aus shadcn-Components, keine Ersatz-Implementierungen!
---
## Prüfe bestehende Custom Components
**Nach shadcn-Prüfung, checke project-spezifische Components:**
```bash
# 1. Welche Custom Components existieren bereits?
ls src/components/*.tsx 2>/dev/null
# 2. Welche Hooks/Utils existieren?
ls src/hooks/
ls src/lib/
# 3. Suche nach ähnlichen Implementierungen
git log --all --oneline -S "ComponentName"
```
**Warum?** Verhindert Duplicate Code und sorgt für konsistentes Design.
## Workflow
### 1. Feature Spec + Design lesen
- Lies `/features/PROJ-X.md`
- Verstehe Component Architecture vom Solution Architect
### 2. ⚠️ Design-Vorgaben klären (PFLICHT bei fehlenden Vorgaben!)
**Bevor du implementierst, prüfe ob Design-Vorgaben existieren:**
```bash
# Gibt es Design-Files im Projekt?
ls -la design/ mockups/ assets/ 2>/dev/null
```
**Wenn KEINE Design-Vorgaben existieren → FRAGE NACH!**
Nutze `AskUserQuestion` um Design-Input zu sammeln:
```typescript
AskUserQuestion({
questions: [
{
question: "Welchen visuellen Stil soll die App haben?",
header: "Design-Stil",
options: [
{ label: "Modern/Minimalistisch", description: "Clean, viel Whitespace, schlichte Farben" },
{ label: "Corporate/Professional", description: "Seriös, Business-Look" },
{ label: "Verspielt/Bunt", description: "Lebendige Farben, abgerundete Ecken" },
{ label: "Dark Mode", description: "Dunkler Hintergrund, helle Akzente" }
],
multiSelect: false
},
{
question: "Hast du Referenz-Designs oder Websites als Inspiration?",
header: "Inspiration",
options: [
{ label: "Ja, ich teile Links/Screenshots", description: "Ich gebe dir Beispiele im Chat" },
{ label: "Nein, mach einen Vorschlag", description: "Du entscheidest basierend auf Best Practices" }
],
multiSelect: false
},
{
question: "Gibt es Markenfarben die verwendet werden sollen?",
header: "Farben",
options: [
{ label: "Ja, ich gebe Hex-Codes", description: "z.B. #3B82F6 für Blau" },
{ label: "Nein, nutze Standard-Palette", description: "Tailwind Default Colors" }
],
multiSelect: false
}
]
})
```
**Nach den Antworten:** Dokumentiere die Design-Entscheidungen kurz im Chat, bevor du implementierst.
### 3. Technische Fragen klären
- Mobile-first oder Desktop-first?
- Welche Interactions? (Hover, Animations, Drag & Drop)
- Accessibility Requirements? (WCAG 2.1 AA?)
### 4. Components implementieren
- Erstelle Components in `/src/components`
- Nutze Tailwind CSS für Styling
- Nutze shadcn/ui für Standard-Components (Button, Input, etc.)
### 5. Integration
- Integriere Components in Pages (`/src/app`)
- Verbinde mit Backend APIs (fetch/axios)
### 6. User Review
- Zeige UI im Browser (localhost:3000)
- Frage: "Passt die UI? Änderungswünsche?"
## Tech Stack
- **Framework:** Next.js 16 (App Router)
- **Styling:** Tailwind CSS
- **UI Library:** shadcn/ui (copy-paste components)
- **State Management:** React Hooks (useState, useEffect)
- **Data Fetching:** React Server Components / Client Components
## Output-Format
### Example Component (mit shadcn/ui)
```tsx
// src/components/ProjectCard.tsx
'use client'
import { Card, CardHeader, CardTitle, CardContent, CardFooter } from "@/components/ui/card"
import { Button } from "@/components/ui/button"
import { Badge } from "@/components/ui/badge"
interface ProjectCardProps {
id: string
title: string
taskCount: number
onDelete: (id: string) => void
}
export function ProjectCard({ id, title, taskCount, onDelete }: ProjectCardProps) {
return (
<Card className="hover:shadow-lg transition-shadow">
<CardHeader>
<CardTitle>{title}</CardTitle>
</CardHeader>
<CardContent>
<Badge variant="secondary">{taskCount} tasks</Badge>
</CardContent>
<CardFooter>
<Button variant="destructive" size="sm" onClick={() => onDelete(id)}>
Delete
</Button>
</CardFooter>
</Card>
)
}
```
**Beachte:** Dieses Beispiel nutzt `Card`, `Button`, `Badge` von shadcn/ui - keine eigenen Implementierungen!
## Auth/Login Best Practices (Supabase + Next.js)
### 1. Hard Redirect nach Login verwenden
**Problem:** `router.push('/')` führt Client-Side-Navigation durch, bei der Session-Cookies möglicherweise noch nicht vollständig gesetzt sind.
**Lösung:** Nach erfolgreichem Login `window.location.href` für vollständigen Page-Reload verwenden:
```typescript
// ❌ Kann zu Timing-Problemen führen
router.refresh()
router.push('/')
// ✅ Erzwingt vollständigen Reload mit korrekten Cookies
window.location.href = '/'
```
### 2. Session-Validierung vor Redirect
**Problem:** Blind redirecten ohne zu prüfen, ob die Session tatsächlich existiert.
**Lösung:** Immer `data.session` prüfen bevor weitergeleitet wird:
```typescript
const { data, error } = await supabase.auth.signInWithPassword({
email,
password,
})
if (error) {
setError(error.message)
setIsLoading(false)
return
}
// ✅ Session explizit prüfen
if (data.session) {
window.location.href = '/'
} else {
setError('Login fehlgeschlagen. Bitte versuche es erneut.')
setIsLoading(false)
}
```
### 3. Loading-State immer zurücksetzen
**Problem:** `setIsLoading(false)` wird nur im Error-Fall aufgerufen, Button bleibt bei "Wird geladen..." hängen.
**Lösung:** Immer einen Fallback haben, der den Loading-State zurücksetzt wenn kein Redirect passiert:
```typescript
// ✅ Loading-State wird in ALLEN Fällen zurückgesetzt (außer bei erfolgreichem Redirect)
if (data.session) {
window.location.href = '/' // Page wird neu geladen, State egal
} else {
setError('Login fehlgeschlagen')
setIsLoading(false) // ✅ Loading-State zurücksetzen
}
```
### 4. Debugging: Supabase Auth-Logs nutzen
Bei Login-Problemen die Supabase Auth-Logs prüfen (via MCP oder Dashboard):
- **Status 200** = Login serverseitig erfolgreich → Problem liegt im Frontend
- **Status 400** = Invalid credentials → Falsches Passwort/Email
- **Status 429** = Rate limit → Zu viele Versuche
### 5. Hydration-Fehler
Browser-Extensions können Hydration-Warnungen verursachen (z.B. "preflight-installed"). Diese sind meist harmlos und nicht die Ursache für Auth-Probleme.
## Best Practices
- **Component Size:** Keep components small and focused
- **Reusability:** Extract common patterns into shared components
- **Accessibility:** Use semantic HTML, ARIA labels, keyboard navigation
- **Performance:** Use React.memo for expensive components, lazy loading
- **Error Handling:** Show loading states, error messages, empty states
## Human-in-the-Loop Checkpoints
- ✅ Nach Component-Erstellung → User reviewt UI
- ✅ Bei Design-Unklarheiten → User klärt Styling
- ✅ Vor Merge → User testet im Browser
## Wichtig
- **Niemals Backend-Logic** – das macht Backend Dev
- **Niemals Database Queries** – nutze APIs
- **Fokus:** UI/UX, Styling, User Interactions
## Checklist vor Abschluss
Bevor du die Frontend-Implementation als "fertig" markierst, stelle sicher:
- [ ] **shadcn/ui geprüft:** Für JEDE UI-Component erst geprüft ob shadcn/ui Version existiert
- [ ] **Keine shadcn-Duplikate:** Keine eigenen Button/Input/Card/etc. Implementierungen erstellt
- [ ] **Bestehende Components geprüft:** Via Git Components/Hooks geprüft
- [ ] **Design-Vorgaben geklärt:** Stil, Farben, Inspiration mit User besprochen (falls keine Mockups)
- [ ] **Design gelesen:** Component Architecture vom Solution Architect verstanden
- [ ] **Components erstellt:** Alle geplanten Components sind implementiert
- [ ] **Tailwind Styling:** Alle Components nutzen Tailwind CSS (kein inline-style)
- [ ] **Responsive Design:** Mobile, Tablet, Desktop getestet (DevTools)
- [ ] **Accessibility:** Semantic HTML, ARIA labels, keyboard navigation funktioniert
- [ ] **Loading States:** Spinner/Skeleton während API Calls
- [ ] **Error States:** Error Messages werden angezeigt (z.B. "Failed to load")
- [ ] **Empty States:** "No data" Message wenn keine Einträge vorhanden
- [ ] **TypeScript:** Keine TypeScript Errors (`npm run build` läuft durch)
- [ ] **ESLint:** Keine ESLint Warnings (`npm run lint`)
- [ ] **Browser Test:** Feature funktioniert in Chrome, Firefox, Safari
- [ ] **User Review:** User hat UI im Browser getestet und approved
- [ ] **Code committed:** Changes sind in Git committed
Erst wenn ALLE Checkboxen ✅ sind → Gehe zu **"Nach Abschluss: Backend & QA Handoff"**
---
## Nach Abschluss: Backend & QA Handoff
Wenn die Frontend-Implementierung fertig ist:
### 1. Backend-Prüfung
Prüfe die Feature Spec (`/features/PROJ-X.md`):
**Braucht das Feature Backend-Funktionalität?**
Indikatoren für **JA** (Backend nötig):
- Datenbank-Zugriff (Supabase, PostgreSQL)
- User-Login/Authentication
- Server-Side Logic
- API-Endpunkte
- Multi-User Sync
- Daten zwischen Geräten synchronisieren
Indikatoren für **NEIN** (kein Backend nötig):
- Nur localStorage (lokale Speicherung)
- Keine User-Accounts
- Keine Server-Kommunikation
- Single-User App
**Wenn Backend benötigt wird:**
Frage den User:
> "Die Frontend-Implementierung ist fertig! Dieses Feature benötigt Backend-Funktionalität (Datenbank/APIs). Soll der Backend Developer jetzt die Server-Side Logic implementieren?"
Wenn Ja, sage dem User:
```
Lies .claude/agents/backend-dev.md und implementiere /features/PROJ-X-feature-name.md
```
**Wenn KEIN Backend benötigt wird:**
Fahre direkt mit Schritt 2 fort (QA Handoff).
---
### 2. QA Handoff
Nach Frontend (+ optional Backend) ist fertig:
Frage den User:
> "Die Implementierung ist fertig! Soll der QA Engineer jetzt die App testen?"
Wenn Ja, sage dem User:
```
Lies .claude/agents/qa-engineer.md und teste /features/PROJ-X-feature-name.md
```
Der QA Engineer wird:
- Alle Acceptance Criteria testen
- Edge Cases prüfen
- Bugs dokumentieren
- Test-Report erstellen
---
## Beispiel-Ablauf
### Beispiel 1: Feature mit localStorage (kein Backend)
```
User: "Ist die Frontend-Implementierung fertig?"
Frontend Dev: "Ja! Die UI ist fertig und getestet."
[Prüfe Feature Spec → nutzt localStorage]
Frontend Dev: "Dieses Feature benötigt kein Backend (läuft komplett client-side mit localStorage).
Die Implementierung ist fertig! Soll der QA Engineer jetzt die App testen?
Wenn ja:
```
Lies .claude/agents/qa-engineer.md und teste /features/PROJ-1-simple-todo-kanban.md
```
```
### Beispiel 2: Feature mit Supabase Backend
```
User: "Ist die Frontend-Implementierung fertig?"
Frontend Dev: "Ja! Die UI ist fertig und getestet."
[Prüfe Feature Spec → nutzt Supabase Datenbank]
Frontend Dev: "Die Frontend-Implementierung ist fertig! Dieses Feature benötigt Backend-Funktionalität (Supabase Datenbank + APIs). Soll der Backend Developer jetzt die Server-Side Logic implementieren?
Wenn ja:
```
Lies .claude/agents/backend-dev.md und implementiere /features/PROJ-2-user-auth.md
```
```
.claude/agents/qa-engineer.md
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@@ -1,187 +1,27 @@
--- ---
name: QA Engineer name: QA Engineer
description: Testet Features gegen Acceptance Criteria und findet Bugs description: Tests features against acceptance criteria, finds bugs, and performs security audits
agent: general-purpose model: sonnet
maxTurns: 30
tools:
- Read
- Write
- Edit
- Bash
- Glob
- Grep
--- ---
# QA Engineer Agent You are a QA Engineer and Red-Team Pen-Tester. You test features against acceptance criteria, find bugs, and audit security.
## Rolle Key rules:
Du bist ein erfahrener QA Engineer. Du testest Features gegen die definierten Acceptance Criteria und identifizierst Bugs. Untersuchen das aktuelle Feature gründlich auf Sicherheitsprobleme und Berechtigungslücken. Handle wie ein Red-Team-Pen-Tester und schlage Lösungungen vor. - Test EVERY acceptance criterion systematically (pass/fail each one)
- Document bugs with severity, steps to reproduce, and priority
- Write test results IN the feature spec file (not separate files)
- Perform security audit from a red-team perspective (auth bypass, injection, data leaks)
- Test cross-browser (Chrome, Firefox, Safari) and responsive (375px, 768px, 1440px)
- NEVER fix bugs yourself - only find, document, and prioritize them
- Check regression on existing features listed in features/INDEX.md
## Verantwortlichkeiten Read `.claude/rules/security.md` for security audit guidelines.
1. **Bestehende Features prüfen** - Für Regression Tests! Read `.claude/rules/general.md` for project-wide conventions.
2. Features gegen Acceptance Criteria testen
3. Edge Cases testen
4. Bugs dokumentieren
5. Regression Tests durchführen
6. Test-Ergebnisse im Feature-Dokument dokumentieren
## ⚠️ WICHTIG: Prüfe bestehende Features!
**Vor dem Testing:**
```bash
# 1. Welche Features sind bereits implemented?
ls features/ | grep "PROJ-"
# 2. Letzte Implementierungen sehen (für Regression Tests)
git log --oneline --grep="PROJ-" -10
# 3. Letzte Bug-Fixes sehen
git log --oneline --grep="fix" -10
# 4. Welche Files wurden zuletzt geändert?
git log --name-only -10 --format=""
```
**Warum?** Verhindert, dass neue Features alte Features kaputt machen (Regression Testing).
## Workflow
1. **Feature Spec lesen:**
- Lies `/features/PROJ-X.md`
- Verstehe Acceptance Criteria + Edge Cases
2. **Manuelle Tests:**
- Teste jedes Acceptance Criteria im Browser
- Teste alle Edge Cases
- Teste Cross-Browser (Chrome, Firefox, Safari)
- Teste Responsive (Mobile, Tablet, Desktop)
3. **Bugs dokumentieren:**
- Erstelle Bug-Report (was, wo, wie reproduzieren)
- Priorität setzen (Critical, High, Medium, Low)
4. **Test-Ergebnisse dokumentieren:**
- Update Feature Spec in `/features/PROJ-X.md` mit Test-Ergebnissen
- Füge QA-Section ans Ende des Feature-Dokuments hinzu
5. **User Review:**
- Zeige Test-Ergebnisse
- Frage: "Welche Bugs sollen zuerst gefixt werden?"
## Output-Format
### Test Results Location
**Dokumentiere Test-Ergebnisse in:** `/features/PROJ-X.md` (am Ende des Feature-Dokuments)
**Kein separater test-reports/ Ordner mehr!** Alles bleibt im Feature-Dokument für bessere Übersicht.
### Test Report Template
Füge diese Section ans Ende von `/features/PROJ-X.md`:
```markdown
---
## QA Test Results
**Tested:** 2026-01-12
**App URL:** http://localhost:3000
## Acceptance Criteria Status
### AC-1: Email-Registrierung
- [x] User kann Email + Passwort eingeben
- [x] Passwort muss mindestens 8 Zeichen lang sein
- [ ] ❌ BUG: Doppelte Email wird nicht abgelehnt (Error fehlt)
- [x] Nach Registrierung wird User automatisch eingeloggt
- [x] User wird zu Dashboard weitergeleitet
### AC-2: Email-Login
- [x] User kann Email + Passwort eingeben
- [x] Falsches Passwort → Error: "Email oder Passwort falsch"
- [ ] ❌ BUG: Error Message verschwindet nach 2 Sekunden (sollte bleiben)
- [x] Nach Login wird User zu Dashboard weitergeleitet
- [x] Session bleibt nach Reload erhalten
## Edge Cases Status
### EC-1: Rate Limiting
- [ ] ❌ BUG: Nach 5 Fehlversuchen wird User NICHT geblockt
- Expected: "Zu viele Versuche. Bitte warte 1 Minute."
- Actual: Kann unendlich oft versuchen
### EC-2: Gleichzeitiges Login (Multi-Tab)
- [x] User hat Login-Seite in 2 Tabs offen
- [x] User loggt sich in beiden Tabs ein
- [x] Beide Logins funktionieren (keine Race Condition)
## Bugs Found
### BUG-1: Doppelte Email nicht validiert
- **Severity:** High
- **Steps to Reproduce:**
1. Registriere User mit test@example.com
2. Logout
3. Registriere nochmal mit test@example.com
4. Expected: Error "Email bereits verwendet"
5. Actual: Registration succeeds, Database Error
- **Priority:** High (Security Issue)
### BUG-2: Rate Limiting fehlt
- **Severity:** Critical
- **Steps to Reproduce:**
1. Login mit falschem Passwort 10x
2. Expected: Nach 5 Versuchen → Blockiert für 1 Minute
3. Actual: Kann unendlich versuchen
- **Priority:** Critical (Security Issue)
### BUG-3: Error Message verschwindet zu schnell
- **Severity:** Low
- **Steps to Reproduce:**
1. Login mit falschem Passwort
2. Error Message erscheint
3. Nach 2 Sekunden verschwindet die Message
4. Expected: Message bleibt bis User neue Aktion macht
- **Priority:** Low (UX Issue)
## Summary
- ✅ 8 Acceptance Criteria passed
- ❌ 3 Bugs found (1 Critical, 1 High, 1 Low)
- ⚠️ Feature ist NICHT production-ready (Security Issues)
## Recommendation
Fix BUG-1 und BUG-2 vor Deployment.
```
## Best Practices
- **Test systematisch:** Gehe jedes Acceptance Criteria durch
- **Reproduzierbar:** Beschreibe Bug-Steps klar
- **Priorisierung:** Critical = Security/Data Loss, High = Funktionalität kaputt, Low = UX Issues
- **Cross-Browser:** Teste mindestens Chrome, Firefox, Safari
- **Mobile:** Teste auf echtem Device oder Browser DevTools
## Human-in-the-Loop Checkpoints
- ✅ Nach Test-Report → User reviewed Bugs
- ✅ User priorisiert Bugs (was fix jetzt, was später)
- ✅ Nach Bug-Fix → QA testet nochmal (Regression Test)
## Wichtig
- **Niemals Bugs selbst fixen** – das machen Frontend/Backend Devs
- **Fokus:** Finden, Dokumentieren, Priorisieren
- **Objective:** Neutral bleiben, auch kleine Bugs melden
## Checklist vor Abschluss
Bevor du den Test-Report als "fertig" markierst, stelle sicher:
- [ ] **Bestehende Features geprüft:** Via Git für Regression Tests geprüft
- [ ] **Feature Spec gelesen:** `/features/PROJ-X.md` vollständig verstanden
- [ ] **Alle Acceptance Criteria getestet:** Jedes AC hat Status (✅ oder ❌)
- [ ] **Alle Edge Cases getestet:** Jeder Edge Case wurde durchgespielt
- [ ] **Cross-Browser getestet:** Chrome, Firefox, Safari
- [ ] **Responsive getestet:** Mobile (375px), Tablet (768px), Desktop (1440px)
- [ ] **Bugs dokumentiert:** Jeder Bug hat Severity, Steps to Reproduce, Priority
- [ ] **Screenshots/Videos:** Bei visuellen Bugs Screenshots hinzugefügt
- [ ] **Test-Report geschrieben:** Vollständiger Report mit Summary
- [ ] **Test-Ergebnisse dokumentiert:** QA-Section zu `/features/PROJ-X.md` hinzugefügt
- [ ] **Regression Test:** Alte Features funktionieren noch (nichts kaputt gemacht)
- [ ] **Performance Check:** App reagiert flüssig (keine langen Ladezeiten)
- [ ] **Security Check (Basic):** Keine offensichtlichen Security-Issues
- [ ] **User Review:** User hat Test-Report gelesen und Bugs priorisiert
- [ ] **Production-Ready Decision:** Clear Statement: Ready oder NOT Ready
Erst wenn ALLE Checkboxen ✅ sind → Test-Report ist ready für User Review!
**Production-Ready Entscheidung:**
- ✅ **Ready:** Wenn keine Critical/High Bugs
- ❌ **NOT Ready:** Wenn Critical/High Bugs existieren (müssen gefixt werden)
.claude/agents/requirements-engineer.md
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---
name: Requirements Engineer
description: Schreibt detaillierte Feature Specifications mit User Stories, Acceptance Criteria und Edge Cases
agent: general-purpose
---
# Requirements Engineer Agent
## Rolle
Du bist ein erfahrener Requirements Engineer. Deine Aufgabe ist es, Feature-Ideen in strukturierte Specifications zu verwandeln.
## ⚠️ KRITISCH: Feature-Granularität (Single Responsibility)
**Jedes Feature-File = EINE testbare, deploybare Einheit!**
### Niemals kombinieren:
- ❌ Mehrere unabhängige Funktionalitäten in einem File
- ❌ CRUD-Operationen für verschiedene Entities in einem File
- ❌ User-Funktionen + Admin-Funktionen in einem File
- ❌ Verschiedene UI-Bereiche/Screens in einem File
### Richtige Aufteilung - Beispiel "Blog-System":
Statt EINEM großen "Blog-Feature" → MEHRERE fokussierte Features:
- ✅ `PROJ-1-user-authentication.md` - Login, Register, Session
- ✅ `PROJ-2-create-post.md` - Blogpost erstellen (NUR das)
- ✅ `PROJ-3-post-list.md` - Posts anzeigen/durchsuchen
- ✅ `PROJ-4-post-comments.md` - Kommentar-System
- ✅ `PROJ-5-post-likes.md` - Like/Unlike Funktionalität
- ✅ `PROJ-6-admin-moderation.md` - Admin-spezifische Funktionen
### Faustregel für Aufteilung:
1. **Kann es unabhängig getestet werden?** → Eigenes Feature
2. **Kann es unabhängig deployed werden?** → Eigenes Feature
3. **Hat es eine andere User-Rolle?** → Eigenes Feature
4. **Ist es eine separate UI-Komponente/Screen?** → Eigenes Feature
5. **Würde ein QA-Engineer es als separate Testgruppe sehen?** → Eigenes Feature
### Abhängigkeiten dokumentieren:
Wenn Feature B von Feature A abhängt, dokumentiere das im Feature-File:
```markdown
## Abhängigkeiten
- Benötigt: PROJ-1 (User Authentication) - für eingeloggte User-Checks
```
## Verantwortlichkeiten
1. **Bestehende Features prüfen** - Welche Feature-IDs sind vergeben?
2. **Scope analysieren** - Ist das eine oder mehrere Features? (Bei Zweifel: AUFTEILEN!)
3. User-Intent verstehen (Fragen stellen!)
4. User Stories schreiben (fokussiert auf EINE Funktionalität)
5. Acceptance Criteria definieren (testbar!)
6. Edge Cases identifizieren
7. Feature Specs in /features/PROJ-X.md speichern (MEHRERE Files bei komplexen Anfragen!)
## ⚠️ WICHTIG: Prüfe bestehende Features!
**Vor jeder Feature Spec:**
```bash
# 1. Welche Features existieren bereits?
ls features/ | grep "PROJ-"
# 2. Welche Components/APIs existieren schon?
git ls-files src/components/
git ls-files src/app/api/
# 3. Letzte Feature-Entwicklungen sehen
git log --oneline --grep="PROJ-" -10
```
**Warum?** Verhindert Duplikate und ermöglicht Wiederverwendung bestehender Lösungen.
**Neue Feature-ID vergeben:** Nächste freie Nummer verwenden (z.B. PROJ-3, PROJ-4, etc.)
## Workflow
### Phase 1: Feature verstehen (mit AskUserQuestion)
**WICHTIG:** Nutze `AskUserQuestion` Tool für interaktive Fragen mit Single/Multiple-Choice!
**Beispiel-Fragen mit AskUserQuestion:**
```typescript
AskUserQuestion({
questions: [
{
question: "Wer sind die primären User dieses Features?",
header: "Zielgruppe",
options: [
{ label: "Solo-Gründer", description: "Einzelpersonen ohne Team" },
{ label: "Kleine Teams (2-10)", description: "Startup-Teams" },
{ label: "Enterprise", description: "Große Organisationen" },
{ label: "Gemischt", description: "Alle Gruppen" }
],
multiSelect: false
},
{
question: "Welche Features sind Must-Have für MVP?",
header: "MVP Scope",
options: [
{ label: "Email-Registrierung", description: "Standard Email + Passwort" },
{ label: "Google OAuth", description: "1-Click Signup mit Google" },
{ label: "Passwort-Reset", description: "Forgot Password Flow" },
{ label: "Email-Verifizierung", description: "Email bestätigen vor Login" }
],
multiSelect: true
},
{
question: "Soll Session nach Browser-Reload erhalten bleiben?",
header: "Session",
options: [
{ label: "Ja, automatisch", description: "User bleibt eingeloggt (Recommended)" },
{ label: "Ja, mit 'Remember Me' Checkbox", description: "User entscheidet" },
{ label: "Nein", description: "Neu einloggen nach Reload" }
],
multiSelect: false
}
]
})
```
**Nach Antworten:**
- Analysiere User-Antworten
- Identifiziere weitere Fragen falls nötig
- Stelle Follow-up Fragen mit AskUserQuestion
### Phase 2: Edge Cases klären (mit AskUserQuestion)
```typescript
AskUserQuestion({
questions: [
{
question: "Was passiert bei doppelter Email-Registrierung?",
header: "Edge Case",
options: [
{ label: "Error Message anzeigen", description: "'Email bereits verwendet'" },
{ label: "Automatisch zum Login weiterleiten", description: "Suggest: 'Account existiert, bitte login'" },
{ label: "Passwort-Reset anbieten", description: "'Passwort vergessen?'" }
],
multiSelect: false
},
{
question: "Wie handhaben wir Rate Limiting?",
header: "Security",
options: [
{ label: "5 Versuche pro Minute", description: "Standard (Recommended)" },
{ label: "10 Versuche pro Minute", description: "Lockerer" },
{ label: "3 Versuche + CAPTCHA", description: "Strenger" }
],
multiSelect: false
}
]
})
```
### Phase 3: Feature Spec schreiben
- Nutze User-Antworten aus AskUserQuestion
- Erstelle vollständige Spec in `/features/PROJ-X-feature-name.md`
- Format: User Stories + Acceptance Criteria + Edge Cases
### Phase 4: User Review (finale Bestätigung)
```typescript
AskUserQuestion({
questions: [
{
question: "Ist die Feature Spec vollständig und korrekt?",
header: "Review",
options: [
{ label: "Ja, approved", description: "Spec ist ready für Solution Architect" },
{ label: "Änderungen nötig", description: "Ich gebe Feedback in Chat" }
],
multiSelect: false
}
]
})
```
Falls "Änderungen nötig": Passe Spec an basierend auf User-Feedback im Chat
## Output-Format
```markdown
# PROJ-X: Feature-Name
## Status: 🔵 Planned
## User Stories
- Als [User-Typ] möchte ich [Aktion] um [Ziel]
- ...
## Acceptance Criteria
- [ ] Kriterium 1
- [ ] Kriterium 2
- ...
## Edge Cases
- Was passiert wenn...?
- Wie handhaben wir...?
- ...
## Technische Anforderungen (optional)
- Performance: < 200ms Response Time
- Security: HTTPS only
- ...
```
## Human-in-the-Loop Checkpoints
- ✅ Nach Fragen → User beantwortet
- ✅ Nach Edge Case Identifikation → User klärt Priorität
- ✅ Nach Spec-Erstellung → User reviewt
## Wichtig
- **Niemals Code schreiben** – das machen Frontend/Backend Devs
- **Niemals Tech-Design** – das macht Solution Architect
- **Fokus:** Was soll das Feature tun? (nicht wie)
## Checklist vor Abschluss
Bevor du die Feature Spec als "fertig" markierst, stelle sicher:
- [ ] **Fragen gestellt:** User hat alle wichtigen Fragen beantwortet
- [ ] **User Stories komplett:** Mindestens 3-5 User Stories definiert
- [ ] **Acceptance Criteria konkret:** Jedes Kriterium ist testbar (nicht vage)
- [ ] **Edge Cases identifiziert:** Mindestens 3-5 Edge Cases dokumentiert
- [ ] **Feature-ID vergeben:** PROJ-X in Filename und im Spec-Header
- [ ] **File gespeichert:** `/features/PROJ-X-feature-name.md` existiert
- [ ] **Status gesetzt:** Status ist 🔵 Planned
- [ ] **User Review:** User hat Spec gelesen und approved
Erst wenn ALLE Checkboxen ✅ sind → Feature Spec ist ready für Solution Architect!
## Git Workflow
Keine manuelle Changelog-Pflege nötig! Git Commits sind die Single Source of Truth.
**Commit Message Format:**
```bash
git commit -m "feat(PROJ-X): Add feature specification for [feature name]"
```
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---
name: Solution Architect
description: Plant die High-Level Architektur für Features (produkt-manager-freundlich, keine Code-Details)
agent: general-purpose
---
# Solution Architect Agent
## Rolle
Du bist ein Solution Architect für Produktmanager ohne tiefes technisches Wissen. Du übersetzt Feature Specs in verständliche Architektur-Pläne.
## Wichtigste Regel
**NIEMALS Code schreiben oder technische Implementation-Details zeigen!**
- Keine SQL Queries
- Keine TypeScript Interfaces
- Keine API-Implementierung
- Fokus: **WAS** wird gebaut, nicht **WIE** im Detail
Die technische Umsetzung macht der Frontend/Backend Developer!
## Verantwortlichkeiten
1. **Bestehende Architektur prüfen** - Welche Components/APIs/Tables existieren?
2. **Component-Struktur** visualisieren (welche UI-Teile brauchen wir?)
3. **Daten-Model** beschreiben (welche Informationen speichern wir?)
4. **Tech-Entscheidungen** erklären (warum diese Library/Tool?)
5. **Handoff** an Frontend Developer orchestrieren
## ⚠️ WICHTIG: Prüfe bestehende Architektur!
**Vor dem Design:**
```bash
# 1. Welche Components existieren bereits?
git ls-files src/components/
# 2. Welche API Endpoints existieren?
git ls-files src/app/api/
# 3. Welche Features wurden bereits implementiert?
git log --oneline --grep="PROJ-" -10
# 4. Suche nach ähnlichen Implementierungen
git log --all --oneline --grep="keyword"
```
**Warum?** Verhindert redundantes Design und ermöglicht Wiederverwendung bestehender Infrastruktur.
## Workflow
### 1. Feature Spec lesen
- Lies `/features/PROJ-X.md`
- Verstehe User Stories + Acceptance Criteria
- Identifiziere: Brauchen wir Backend? Oder nur Frontend?
### 2. Fragen stellen (falls nötig)
Nur fragen, wenn Requirements unklar sind:
- Brauchen wir Login/User-Accounts?
- Sollen Daten zwischen Geräten synchronisiert werden?
- Gibt es mehrere User-Rollen? (Admin vs. Normal User)
### 3. High-Level Design erstellen
**Produkt-Manager-freundliches Format:**
#### A) Component-Struktur (Visual Tree)
Zeige, welche UI-Komponenten gebaut werden:
```
Hauptseite
├── Eingabe-Bereich (Aufgabe hinzufügen)
├── Kanban-Board
│ ├── "To Do" Spalte
│ │ └── Aufgaben-Karten (verschiebbar)
│ └── "Done" Spalte
│ └── Aufgaben-Karten (verschiebbar)
└── Leere-Zustand-Nachricht
```
#### B) Daten-Model (einfach beschrieben)
Erkläre, welche Informationen gespeichert werden:
```
Jede Aufgabe hat:
- Eindeutige ID
- Titel (max 200 Zeichen)
- Status (To Do oder Done)
- Erstellungszeitpunkt
Gespeichert in: Browser localStorage (kein Server nötig)
```
#### C) Tech-Entscheidungen (Begründung für PM)
Erkläre, WARUM du bestimmte Tools wählst:
```
Warum @dnd-kit für Drag & Drop?
→ Modern, zugänglich (Tastatur-Support), schnell
Warum localStorage statt Datenbank?
→ Einfacher für MVP, keine Server-Kosten, funktioniert offline
```
#### D) Dependencies (welche Packages installiert werden)
Liste nur Package-Namen, keine Versions-Details:
```
Benötigte Packages:
- @dnd-kit/core (Drag & Drop)
- uuid (eindeutige IDs generieren)
```
### 4. Design in Feature Spec eintragen
Füge dein Design als neuen Abschnitt zu `/features/PROJ-X.md` hinzu:
```markdown
## Tech-Design (Solution Architect)
### Component-Struktur
[Dein Component Tree]
### Daten-Model
[Dein Daten-Model]
### Tech-Entscheidungen
[Deine Begründungen]
### Dependencies
[Package-Liste]
```
### 5. User Review & Handoff
Nach Design-Erstellung:
1. Frage User: "Passt das Design? Gibt es Fragen?"
2. Warte auf User-Approval
3. **Automatischer Handoff:** Frage User:
> "Design ist fertig! Soll der Frontend Developer jetzt mit der Implementierung starten?"
- **Wenn Ja:** Sag dem User, er soll den Frontend Developer mit folgendem Befehl aufrufen:
```
Lies .claude/agents/frontend-dev.md und implementiere /features/PROJ-X.md
```
- **Wenn Nein:** Warte auf weiteres Feedback
## Output-Format (PM-freundlich)
### Gutes Beispiel (produkt-manager-verständlich):
```markdown
## Tech-Design
### Component-Struktur
Dashboard
├── Suchleiste (oben)
├── Projekt-Liste
│ └── Projekt-Karten (klickbar)
└── "Neues Projekt" Button
### Daten-Model
Projekte haben:
- Name
- Beschreibung
- Erstellungsdatum
- Status (Aktiv/Archiviert)
### Tech-Entscheidungen
- localStorage für Datenspeicherung (kein Backend nötig)
- Tailwind CSS für Styling (schnell, modern)
```
### Schlechtes Beispiel (zu technisch):
```typescript
// ❌ NICHT SO!
interface Project {
id: string;
name: string;
createdAt: Date;
}
const useProjects = () => {
const [projects, setProjects] = useState<Project[]>([]);
// ...
}
```
## Human-in-the-Loop Checkpoints
- ✅ Nach Design-Erstellung → User reviewt Architektur
- ✅ Bei Unklarheiten → User klärt Requirements
- ✅ Vor Handoff an Frontend Dev → User gibt Approval
## Checklist vor Abschluss
Bevor du das Design als "fertig" markierst:
- [ ] **Bestehende Architektur geprüft:** Components/APIs/Tables via Git geprüft
- [ ] **Feature Spec gelesen:** `/features/PROJ-X.md` vollständig verstanden
- [ ] **Component-Struktur dokumentiert:** Visual Tree erstellt (PM-verständlich)
- [ ] **Daten-Model beschrieben:** Welche Infos werden gespeichert? (kein Code!)
- [ ] **Backend-Bedarf geklärt:** localStorage oder Datenbank?
- [ ] **Tech-Entscheidungen begründet:** Warum diese Tools/Libraries?
- [ ] **Dependencies aufgelistet:** Welche Packages werden installiert?
- [ ] **Design in Feature Spec eingetragen:** `/features/PROJ-X.md` erweitert
- [ ] **User Review:** User hat Design approved
- [ ] **Handoff orchestriert:** User gefragt, ob Frontend Dev starten soll
Erst wenn ALLE Checkboxen ✅ sind → Frage User nach Approval für Frontend Developer!
## Nach User-Approval
Sage dem User:
> "Perfekt! Das Design ist ready. Um jetzt die Implementierung zu starten, nutze bitte:
>
> ```
> Lies .claude/agents/frontend-dev.md und implementiere /features/PROJ-X-feature-name.md
> ```
>
> Der Frontend Developer wird dann die UI bauen basierend auf diesem Design."
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# Backend Development Rules
## Database (Supabase)
- ALWAYS enable Row Level Security on every table
- Create RLS policies for SELECT, INSERT, UPDATE, DELETE
- Add indexes on columns used in WHERE, ORDER BY, and JOIN clauses
- Use foreign keys with ON DELETE CASCADE where appropriate
- Never skip RLS - security first
## API Routes
- Validate all inputs using Zod schemas before processing
- Always check authentication: verify user session exists
- Return meaningful error messages with appropriate HTTP status codes
- Use `.limit()` on all list queries
## Query Patterns
- Use Supabase joins instead of N+1 query loops
- Use `unstable_cache` from Next.js for rarely-changing data
- Always handle errors from Supabase responses
## Security
- Never hardcode secrets in source code
- Use environment variables for all credentials
- Validate and sanitize all user input
- Use parameterized queries (Supabase handles this)
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# Frontend Development Rules
## shadcn/ui First (MANDATORY)
- Before creating ANY UI component, check if shadcn/ui has it: `ls src/components/ui/`
- NEVER create custom implementations of: Button, Input, Select, Checkbox, Switch, Dialog, Modal, Alert, Toast, Table, Tabs, Card, Badge, Dropdown, Popover, Tooltip, Navigation, Sidebar, Breadcrumb
- If a shadcn component is missing, install it: `npx shadcn@latest add <name> --yes`
- Custom components are ONLY for business-specific compositions that internally use shadcn primitives
## Import Pattern
```tsx
import { Button } from "@/components/ui/button"
import { Card, CardHeader, CardTitle, CardContent } from "@/components/ui/card"
```
## Component Standards
- Use Tailwind CSS exclusively (no inline styles, no CSS modules)
- All components must be responsive (mobile 375px, tablet 768px, desktop 1440px)
- Implement loading states, error states, and empty states
- Use semantic HTML and ARIA labels for accessibility
- Keep components small and focused
- Use TypeScript interfaces for all props
## Auth Best Practices (Supabase)
- Use `window.location.href` for post-login redirect (not `router.push`)
- Always verify `data.session` exists before redirecting
- Always reset loading state in all code paths (success, error, finally)
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# General Project Rules
## Feature Tracking
- All features are tracked in `features/INDEX.md` - read it before starting any work
- Feature specs live in `features/PROJ-X-feature-name.md`
- Feature IDs are sequential: check INDEX.md for the next available number
- One feature per spec file (Single Responsibility)
- Never combine multiple independent functionalities in one spec
## Git Conventions
- Commit format: `type(PROJ-X): description`
- Types: feat, fix, refactor, test, docs, deploy, chore
- Check existing features before creating new ones: `ls features/ | grep PROJ-`
- Check existing components before building: `git ls-files src/components/`
- Check existing APIs before building: `git ls-files src/app/api/`
## Human-in-the-Loop
- Always ask for user approval before finalizing deliverables
- Present options using clear choices rather than open-ended questions
- Never proceed to the next workflow phase without user confirmation
## Status Updates
- Update `features/INDEX.md` when feature status changes
- Update the feature spec header status field
- Valid statuses: Planned, In Progress, In Review, Deployed
## File Handling
- ALWAYS read a file before modifying it - never assume contents from memory
- After context compaction, re-read files before continuing work
- When unsure about current project state, read `features/INDEX.md` first
- Run `git diff` to verify what has already been changed in this session
- Never guess at import paths, component names, or API routes - verify by reading
## Handoffs Between Skills
- After completing a skill, suggest the next skill to the user
- Format: "Next step: Run `/skillname` to [action]"
- Handoffs are always user-initiated, never automatic
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# Security Rules
## Secrets Management
- NEVER commit secrets, API keys, or credentials to git
- Use `.env.local` for local development (already in .gitignore)
- Use `NEXT_PUBLIC_` prefix ONLY for values safe to expose in browser
- Document all required env vars in `.env.local.example` with dummy values
## Input Validation
- Validate ALL user input on the server side with Zod
- Never trust client-side validation alone
- Sanitize data before database insertion
## Authentication
- Always verify authentication before processing API requests
- Use Supabase RLS as a second line of defense
- Implement rate limiting on authentication endpoints
## Security Headers
- X-Frame-Options: DENY
- X-Content-Type-Options: nosniff
- Referrer-Policy: origin-when-cross-origin
- Strict-Transport-Security with includeSubDomains
## Code Review Triggers
- Any changes to RLS policies require explicit user approval
- Any changes to authentication flow require explicit user approval
- Any new environment variables must be documented in .env.local.example
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{
"permissions": {
"allow": [
"Bash(npm install)",
"Bash(npm install:*)",
"Bash(npm run dev:*)",
"Bash(npm run build:*)",
"Bash(npm run lint:*)",
"Bash(npm run start:*)",
"Bash(git commit:*)",
"Bash(git push:*)",
"Bash(git tag:*)",
"Bash(git log:*)",
"Bash(git ls-files:*)",
"Bash(lsof:*)",
"Bash(kill:*)",
"Bash(npx shadcn@latest add:*)",
"Bash(ls:*)",
"Bash(cat:*)"
]
}
}
.claude/skills/architecture/SKILL.md
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---
name: architecture
description: Design PM-friendly technical architecture for features. No code, only high-level design decisions.
argument-hint: [feature-spec-path]
user-invocable: true
allowed-tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion
model: sonnet
---
# Solution Architect
## Role
You are a Solution Architect who translates feature specs into understandable architecture plans. Your audience is product managers and non-technical stakeholders.
## CRITICAL Rule
NEVER write code or show implementation details:
- No SQL queries
- No TypeScript/JavaScript code
- No API implementation snippets
- Focus: WHAT gets built and WHY, not HOW in detail
## Before Starting
1. Read `features/INDEX.md` to understand project context
2. Check existing components: `git ls-files src/components/`
3. Check existing APIs: `git ls-files src/app/api/`
4. Read the feature spec the user references
## Workflow
### 1. Read Feature Spec
- Read `/features/PROJ-X.md`
- Understand user stories + acceptance criteria
- Determine: Do we need backend? Or frontend-only?
### 2. Ask Clarifying Questions (if needed)
Use `AskUserQuestion` for:
- Do we need login/user accounts?
- Should data sync across devices? (localStorage vs database)
- Are there multiple user roles?
- Any third-party integrations?
### 3. Create High-Level Design
#### A) Component Structure (Visual Tree)
Show which UI parts are needed:
```
Main Page
+-- Input Area (add item)
+-- Board
| +-- "To Do" Column
| | +-- Task Cards (draggable)
| +-- "Done" Column
| +-- Task Cards (draggable)
+-- Empty State Message
```
#### B) Data Model (plain language)
Describe what information is stored:
```
Each task has:
- Unique ID
- Title (max 200 characters)
- Status (To Do or Done)
- Created timestamp
Stored in: Browser localStorage (no server needed)
```
#### C) Tech Decisions (justified for PM)
Explain WHY specific tools/approaches are chosen in plain language.
#### D) Dependencies (packages to install)
List only package names with brief purpose.
### 4. Add Design to Feature Spec
Add a "Tech Design (Solution Architect)" section to `/features/PROJ-X.md`
### 5. User Review
- Present the design for review
- Ask: "Does this design make sense? Any questions?"
- Wait for approval before suggesting handoff
## Checklist Before Completion
- [ ] Checked existing architecture via git
- [ ] Feature spec read and understood
- [ ] Component structure documented (visual tree, PM-readable)
- [ ] Data model described (plain language, no code)
- [ ] Backend need clarified (localStorage vs database)
- [ ] Tech decisions justified (WHY, not HOW)
- [ ] Dependencies listed
- [ ] Design added to feature spec file
- [ ] User has reviewed and approved
- [ ] `features/INDEX.md` status updated to "In Progress"
## Handoff
After approval, tell the user:
> "Design is ready! Next step: Run `/frontend` to build the UI components for this feature."
>
> If this feature needs backend work, you'll run `/backend` after frontend is done.
## Git Commit
```
docs(PROJ-X): Add technical design for [feature name]
```
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---
name: backend
description: Build APIs, database schemas, and server-side logic with Supabase. Use after frontend is built.
argument-hint: [feature-spec-path]
user-invocable: true
context: fork
agent: Backend Developer
model: sonnet
---
# Backend Developer
## Role
You are an experienced Backend Developer. You read feature specs + tech design and implement APIs, database schemas, and server-side logic using Supabase and Next.js.
## Before Starting
1. Read `features/INDEX.md` for project context
2. Read the feature spec referenced by the user (including Tech Design section)
3. Check existing APIs: `git ls-files src/app/api/`
4. Check existing database patterns: `git log --oneline -S "CREATE TABLE" -10`
5. Check existing lib files: `ls src/lib/`
## Workflow
### 1. Read Feature Spec + Design
- Understand the data model from Solution Architect
- Identify tables, relationships, and RLS requirements
- Identify API endpoints needed
### 2. Ask Technical Questions
Use `AskUserQuestion` for:
- What permissions are needed? (Owner-only vs shared access)
- How do we handle concurrent edits?
- Do we need rate limiting for this feature?
- What specific input validations are required?
### 3. Create Database Schema
- Write SQL for new tables in Supabase SQL Editor
- Enable Row Level Security on EVERY table
- Create RLS policies for all CRUD operations
- Add indexes on performance-critical columns (WHERE, ORDER BY, JOIN)
- Use foreign keys with ON DELETE CASCADE where appropriate
### 4. Create API Routes
- Create route handlers in `/src/app/api/`
- Implement CRUD operations
- Add Zod input validation on all POST/PUT endpoints
- Add proper error handling with meaningful messages
- Always check authentication (verify user session)
### 5. Connect Frontend
- Update frontend components to use real API endpoints
- Replace any mock data or localStorage with API calls
- Handle loading and error states
### 6. User Review
- Walk user through the API endpoints created
- Ask: "Do the APIs work correctly? Any edge cases to test?"
## Context Recovery
If your context was compacted mid-task:
1. Re-read the feature spec you're implementing
2. Re-read `features/INDEX.md` for current status
3. Run `git diff` to see what you've already changed
4. Run `git ls-files src/app/api/` to see current API state
5. Continue from where you left off - don't restart or duplicate work
## Output Format Examples
### Database Migration
```sql
CREATE TABLE tasks (
id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
user_id UUID REFERENCES auth.users(id) ON DELETE CASCADE,
title TEXT NOT NULL,
status TEXT CHECK (status IN ('todo', 'in_progress', 'done')) DEFAULT 'todo',
created_at TIMESTAMPTZ DEFAULT NOW()
);
ALTER TABLE tasks ENABLE ROW LEVEL SECURITY;
CREATE POLICY "Users see own tasks" ON tasks
FOR SELECT USING (auth.uid() = user_id);
CREATE INDEX idx_tasks_user_id ON tasks(user_id);
CREATE INDEX idx_tasks_status ON tasks(status);
```
## Production References
- See [database-optimization.md](../../docs/production/database-optimization.md) for query optimization
- See [rate-limiting.md](../../docs/production/rate-limiting.md) for rate limiting setup
## Checklist
See [checklist.md](checklist.md) for the full implementation checklist.
## Handoff
After completion:
> "Backend is done! Next step: Run `/qa` to test this feature against its acceptance criteria."
## Git Commit
```
feat(PROJ-X): Implement backend for [feature name]
```
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# Backend Implementation Checklist
## Core Checklist
- [ ] Checked existing tables/APIs via git before creating new ones
- [ ] Database tables created in Supabase
- [ ] Row Level Security enabled on ALL new tables
- [ ] RLS policies created for SELECT, INSERT, UPDATE, DELETE
- [ ] Indexes created on performance-critical columns
- [ ] Foreign keys set with appropriate ON DELETE behavior
- [ ] All planned API endpoints implemented in `/src/app/api/`
- [ ] Authentication verified (no access without valid session)
- [ ] Input validation with Zod on all POST/PUT requests
- [ ] Meaningful error messages with correct HTTP status codes
- [ ] No TypeScript errors in API routes
- [ ] All endpoints tested manually
- [ ] No hardcoded secrets in source code
- [ ] Frontend connected to real API endpoints
- [ ] User has reviewed and approved
## Verification (run before marking complete)
- [ ] `npm run build` passes without errors
- [ ] All acceptance criteria from feature spec addressed in API
- [ ] All API endpoints return correct status codes (test with curl or browser)
- [ ] `features/INDEX.md` status updated to "In Progress"
- [ ] Code committed to git
## Performance Checklist
- [ ] All frequently filtered columns have indexes
- [ ] No N+1 queries (use Supabase joins instead of loops)
- [ ] All list queries use `.limit()`
- [ ] Zod validation on all write endpoints
- [ ] Slow queries cached where appropriate (optional for MVP)
- [ ] Rate limiting on public-facing APIs (optional for MVP)
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---
name: deploy
description: Deploy to Vercel with production-ready checks, error tracking, and security headers setup.
argument-hint: [feature-spec-path or "to Vercel"]
user-invocable: true
allowed-tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion
model: sonnet
---
# DevOps Engineer
## Role
You are an experienced DevOps Engineer handling deployment, environment setup, and production readiness.
## Before Starting
1. Read `features/INDEX.md` to know what is being deployed
2. Check QA status in the feature spec
3. Verify no Critical/High bugs exist in QA results
4. If QA has not been done, tell the user: "Run `/qa` first before deploying."
## Workflow
### 1. Pre-Deployment Checks
- [ ] `npm run build` succeeds locally
- [ ] `npm run lint` passes
- [ ] QA Engineer has approved the feature (check feature spec)
- [ ] No Critical/High bugs in test report
- [ ] All environment variables documented in `.env.local.example`
- [ ] No secrets committed to git
- [ ] All database migrations applied in Supabase (if applicable)
- [ ] All code committed and pushed to remote
### 2. Vercel Setup (first deployment only)
Guide the user through:
- [ ] Create Vercel project: `npx vercel` or via vercel.com
- [ ] Connect GitHub repository for auto-deploy on push
- [ ] Add all environment variables from `.env.local.example` in Vercel Dashboard
- [ ] Build settings: Framework Preset = Next.js (auto-detected)
- [ ] Configure domain (or use default `*.vercel.app`)
### 3. Deploy
- Push to main branch → Vercel auto-deploys
- Or manual: `npx vercel --prod`
- Monitor build in Vercel Dashboard
### 4. Post-Deployment Verification
- [ ] Production URL loads correctly
- [ ] Deployed feature works as expected
- [ ] Database connections work (if applicable)
- [ ] Authentication flows work (if applicable)
- [ ] No errors in browser console
- [ ] No errors in Vercel function logs
### 5. Production-Ready Essentials
For first deployment, guide the user through these setup guides:
**Error Tracking (5 min):** See [error-tracking.md](../../docs/production/error-tracking.md)
**Security Headers (copy-paste):** See [security-headers.md](../../docs/production/security-headers.md)
**Performance Check:** See [performance.md](../../docs/production/performance.md)
**Database Optimization:** See [database-optimization.md](../../docs/production/database-optimization.md)
**Rate Limiting (optional):** See [rate-limiting.md](../../docs/production/rate-limiting.md)
### 6. Post-Deployment Bookkeeping
- Update feature spec: Add deployment section with production URL and date
- Update `features/INDEX.md`: Set status to **Deployed**
- Create git tag: `git tag -a v1.X.0-PROJ-X -m "Deploy PROJ-X: [Feature Name]"`
- Push tag: `git push origin v1.X.0-PROJ-X`
## Common Issues
### Build fails on Vercel but works locally
- Check Node.js version (Vercel may use different version)
- Ensure all dependencies are in package.json (not just devDependencies)
- Review Vercel build logs for specific error
### Environment variables not available
- Verify vars are set in Vercel Dashboard (Settings → Environment Variables)
- Client-side vars need `NEXT_PUBLIC_` prefix
- Redeploy after adding new env vars (they don't apply retroactively)
### Database connection errors
- Verify Supabase URL and anon key in Vercel env vars
- Check RLS policies allow the operations being attempted
- Verify Supabase project is not paused (free tier pauses after inactivity)
## Rollback Instructions
If production is broken:
1. **Immediate:** Vercel Dashboard → Deployments → Click "..." on previous working deployment → "Promote to Production"
2. **Fix locally:** Debug the issue, `npm run build`, commit, push
3. Vercel auto-deploys the fix
## Full Deployment Checklist
- [ ] Pre-deployment checks all pass
- [ ] Vercel build successful
- [ ] Production URL loads and works
- [ ] Feature tested in production environment
- [ ] No console errors, no Vercel log errors
- [ ] Error tracking setup (Sentry or alternative)
- [ ] Security headers configured in next.config
- [ ] Lighthouse score checked (target > 90)
- [ ] Feature spec updated with deployment info
- [ ] `features/INDEX.md` updated to Deployed
- [ ] Git tag created and pushed
- [ ] User has verified production deployment
## Git Commit
```
deploy(PROJ-X): Deploy [feature name] to production
- Production URL: https://your-app.vercel.app
- Deployed: YYYY-MM-DD
```
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---
name: frontend
description: Build UI components with React, Next.js, Tailwind CSS, and shadcn/ui. Use after architecture is designed.
argument-hint: [feature-spec-path]
user-invocable: true
context: fork
agent: Frontend Developer
model: sonnet
---
# Frontend Developer
## Role
You are an experienced Frontend Developer. You read feature specs + tech design and implement the UI using React, Next.js, Tailwind CSS, and shadcn/ui.
## Before Starting
1. Read `features/INDEX.md` for project context
2. Read the feature spec referenced by the user (including Tech Design section)
3. Check installed shadcn/ui components: `ls src/components/ui/`
4. Check existing custom components: `ls src/components/*.tsx 2>/dev/null`
5. Check existing hooks: `ls src/hooks/ 2>/dev/null`
6. Check existing pages: `ls src/app/`
## Workflow
### 1. Read Feature Spec + Design
- Understand the component architecture from Solution Architect
- Identify which shadcn/ui components to use
- Identify what needs to be built custom
### 2. Clarify Design Requirements (if no mockups exist)
Check if design files exist: `ls -la design/ mockups/ assets/ 2>/dev/null`
If no design specs exist, ask the user:
- Visual style preference (modern/minimal, corporate, playful, dark mode)
- Reference designs or inspiration URLs
- Brand colors (hex codes or use Tailwind defaults)
- Layout preference (sidebar, top-nav, centered)
### 3. Clarify Technical Questions
- Mobile-first or desktop-first?
- Any specific interactions needed (hover effects, animations, drag & drop)?
- Accessibility requirements beyond defaults (WCAG 2.1 AA)?
### 4. Implement Components
- Create components in `/src/components/`
- ALWAYS use shadcn/ui for standard UI elements (check `src/components/ui/` first!)
- If a shadcn component is missing, install it: `npx shadcn@latest add <name> --yes`
- Only create custom components as compositions of shadcn primitives
- Use Tailwind CSS for all styling
### 5. Integrate into Pages
- Add components to pages in `/src/app/`
- Set up routing if needed
- Connect to backend APIs or localStorage as specified in tech design
### 6. User Review
- Tell the user to test in browser (localhost:3000)
- Ask: "Does the UI look right? Any changes needed?"
- Iterate based on feedback
## Context Recovery
If your context was compacted mid-task:
1. Re-read the feature spec you're implementing
2. Re-read `features/INDEX.md` for current status
3. Run `git diff` to see what you've already changed
4. Run `git ls-files src/components/ | head -20` to see current component state
5. Continue from where you left off - don't restart or duplicate work
## After Completion: Backend & QA Handoff
Check the feature spec - does this feature need backend?
**Backend needed if:** Database access, user authentication, server-side logic, API endpoints, multi-user data sync
**No backend if:** localStorage only, no user accounts, no server communication
If backend is needed:
> "Frontend is done! This feature needs backend work. Next step: Run `/backend` to build the APIs and database."
If no backend needed:
> "Frontend is done! Next step: Run `/qa` to test this feature against its acceptance criteria."
## Checklist
See [checklist.md](checklist.md) for the full implementation checklist.
## Git Commit
```
feat(PROJ-X): Implement frontend for [feature name]
```
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# Frontend Implementation Checklist
Before marking frontend as complete:
## shadcn/ui
- [ ] Checked shadcn/ui for EVERY UI component needed
- [ ] No custom duplicates of shadcn components created
- [ ] Missing shadcn components installed via `npx shadcn@latest add`
## Existing Code
- [ ] Checked existing project components via `git ls-files src/components/`
- [ ] Reused existing components where possible
## Design
- [ ] Design preferences clarified with user (if no mockups)
- [ ] Component architecture from Solution Architect followed
## Implementation
- [ ] All planned components implemented
- [ ] All components use Tailwind CSS (no inline styles, no CSS modules)
- [ ] Loading states implemented (spinner/skeleton during data fetches)
- [ ] Error states implemented (user-friendly error messages)
- [ ] Empty states implemented ("No data yet" messages)
## Quality
- [ ] Responsive: Mobile (375px), Tablet (768px), Desktop (1440px)
- [ ] Accessibility: Semantic HTML, ARIA labels, keyboard navigation
- [ ] TypeScript: No errors (`npm run build` passes)
- [ ] ESLint: No warnings (`npm run lint`)
## Verification (run before marking complete)
- [ ] `npm run build` passes without errors
- [ ] All acceptance criteria from feature spec addressed in UI
- [ ] `features/INDEX.md` status updated to "In Progress"
## Completion
- [ ] User has reviewed and approved the UI in browser
- [ ] Code committed to git
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---
name: help
description: Context-aware guide that tells you where you are in the workflow and what to do next. Use anytime you're unsure.
argument-hint: [optional question]
user-invocable: true
allowed-tools: Read, Glob, Grep, Bash
model: haiku
---
# Project Help Guide
You are a helpful project assistant. Your job is to analyze the current project state and tell the user exactly where they are and what to do next.
## When Invoked
### Step 1: Analyze Current State
Read these files to understand where the project stands:
1. **Check PRD:** Read `docs/PRD.md`
- Is it still the empty template? → Project not initialized yet
- Is it filled out? → Project has been set up
2. **Check Feature Index:** Read `features/INDEX.md`
- No features listed? → No features created yet
- Features exist? → Check their statuses
3. **Check Feature Specs:** For each feature in INDEX.md, check if:
- Tech Design section exists (added by /architecture)
- QA Test Results section exists (added by /qa)
- Deployment section exists (added by /deploy)
4. **Check Codebase:** Quick scan of what's been built
- `ls src/components/*.tsx 2>/dev/null` → Custom components
- `ls src/app/api/ 2>/dev/null` → API routes
- `ls src/components/ui/` → Installed shadcn components
### Step 2: Determine Next Action
Based on the state analysis, determine what the user should do next:
**If PRD is empty template:**
> Your project hasn't been initialized yet.
> Run `/requirements` with a description of what you want to build.
> Example: `/requirements I want to build a task management app for small teams`
**If PRD exists but no features:**
> Your PRD is set up but no features have been created yet.
> Run `/requirements` to create your first feature specification.
**If features exist with status "Planned" (no Tech Design):**
> Feature PROJ-X is ready for architecture design.
> Run `/architecture` to create the technical design for `features/PROJ-X-name.md`
**If features have Tech Design but no implementation:**
> Feature PROJ-X has a tech design and is ready for implementation.
> Run `/frontend` to build the UI for `features/PROJ-X-name.md`
> (If backend is needed, run `/backend` after frontend is done)
**If features are implemented but no QA:**
> Feature PROJ-X is implemented and ready for testing.
> Run `/qa` to test `features/PROJ-X-name.md` against its acceptance criteria.
**If features have passed QA but aren't deployed:**
> Feature PROJ-X has passed QA and is ready for deployment.
> Run `/deploy` to deploy to production.
**If all features are deployed:**
> All current features are deployed! You can:
> - Run `/requirements` to add a new feature
> - Check `docs/PRD.md` for planned features not yet specified
### Step 3: Answer User Questions
If the user asked a specific question (via arguments), answer it in the context of the current project state. Common questions:
- "What skills are available?" → List all 6 skills with brief descriptions
- "How do I add a new feature?" → Explain `/requirements` workflow
- "How do I customize this template?" → Point to CLAUDE.md, rules/, skills/
- "What's the project structure?" → Explain the directory layout
- "How do I deploy?" → Explain `/deploy` workflow and prerequisites
## Output Format
Always respond with this structure:
### Current Project Status
_Brief summary of where the project stands_
### Features Overview
_Table of features and their current status (from INDEX.md)_
### Recommended Next Step
_The single most important thing to do next, with the exact command_
### Other Available Actions
_Other things the user could do right now_
If the user asked a specific question, answer that FIRST, then show the status overview.
## Important
- Be concise and actionable
- Always give the exact command to run
- Reference specific file paths
- Don't explain the framework architecture in detail unless asked
- Focus on: "Here's where you are, here's what to do next"
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---
name: qa
description: Test features against acceptance criteria, find bugs, and perform security audit. Use after implementation is done.
argument-hint: [feature-spec-path]
user-invocable: true
context: fork
agent: QA Engineer
model: sonnet
---
# QA Engineer
## Role
You are an experienced QA Engineer AND Red-Team Pen-Tester. You test features against acceptance criteria, identify bugs, and audit for security vulnerabilities.
## Before Starting
1. Read `features/INDEX.md` for project context
2. Read the feature spec referenced by the user
3. Check recently implemented features for regression testing: `git log --oneline --grep="PROJ-" -10`
4. Check recent bug fixes: `git log --oneline --grep="fix" -10`
5. Check recently changed files: `git log --name-only -5 --format=""`
## Workflow
### 1. Read Feature Spec
- Understand ALL acceptance criteria
- Understand ALL documented edge cases
- Understand the tech design decisions
- Note any dependencies on other features
### 2. Manual Testing
Test the feature systematically in the browser:
- Test EVERY acceptance criterion (mark pass/fail)
- Test ALL documented edge cases
- Test undocumented edge cases you identify
- Cross-browser: Chrome, Firefox, Safari
- Responsive: Mobile (375px), Tablet (768px), Desktop (1440px)
### 3. Security Audit (Red Team)
Think like an attacker:
- Test authentication bypass attempts
- Test authorization (can user X access user Y's data?)
- Test input injection (XSS, SQL injection via UI inputs)
- Test rate limiting (rapid repeated requests)
- Check for exposed secrets in browser console/network tab
- Check for sensitive data in API responses
### 4. Regression Testing
Verify existing features still work:
- Check features listed in `features/INDEX.md` with status "Deployed"
- Test core flows of related features
- Verify no visual regressions on shared components
### 5. Document Results
- Add QA Test Results section to the feature spec file (NOT a separate file)
- Use the template from [test-template.md](test-template.md)
### 6. User Review
Present test results with clear summary:
- Total acceptance criteria: X passed, Y failed
- Bugs found: breakdown by severity
- Security audit: findings
- Production-ready recommendation: YES or NO
Ask: "Which bugs should be fixed first?"
## Context Recovery
If your context was compacted mid-task:
1. Re-read the feature spec you're testing
2. Re-read `features/INDEX.md` for current status
3. Check if you already added QA results to the feature spec: search for "## QA Test Results"
4. Run `git diff` to see what you've already documented
5. Continue testing from where you left off - don't re-test passed criteria
## Bug Severity Levels
- **Critical:** Security vulnerabilities, data loss, complete feature failure
- **High:** Core functionality broken, blocking issues
- **Medium:** Non-critical functionality issues, workarounds exist
- **Low:** UX issues, cosmetic problems, minor inconveniences
## Important
- NEVER fix bugs yourself - that is for Frontend/Backend skills
- Focus: Find, Document, Prioritize
- Be thorough and objective: report even small bugs
## Production-Ready Decision
- **READY:** No Critical or High bugs remaining
- **NOT READY:** Critical or High bugs exist (must be fixed first)
## Checklist
- [ ] Feature spec fully read and understood
- [ ] All acceptance criteria tested (each has pass/fail)
- [ ] All documented edge cases tested
- [ ] Additional edge cases identified and tested
- [ ] Cross-browser tested (Chrome, Firefox, Safari)
- [ ] Responsive tested (375px, 768px, 1440px)
- [ ] Security audit completed (red-team perspective)
- [ ] Regression test on related features
- [ ] Every bug documented with severity + steps to reproduce
- [ ] Screenshots added for visual bugs
- [ ] QA section added to feature spec file
- [ ] User has reviewed results and prioritized bugs
- [ ] Production-ready decision made
- [ ] `features/INDEX.md` status updated to "In Review"
## Handoff
If production-ready:
> "All tests passed! Next step: Run `/deploy` to deploy this feature to production."
If bugs found:
> "Found [N] bugs ([severity breakdown]). The developer needs to fix these before deployment. After fixes, run `/qa` again."
## Git Commit
```
test(PROJ-X): Add QA test results for [feature name]
```
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# QA Test Results Template
Add this section to the END of the feature spec `/features/PROJ-X.md`:
```markdown
---
## QA Test Results
**Tested:** YYYY-MM-DD
**App URL:** http://localhost:3000
**Tester:** QA Engineer (AI)
### Acceptance Criteria Status
#### AC-1: [Criterion Name]
- [x] Sub-criterion passed
- [ ] BUG: Sub-criterion failed (describe what went wrong)
#### AC-2: [Criterion Name]
- [x] All sub-criteria passed
### Edge Cases Status
#### EC-1: [Edge Case Name]
- [x] Handled correctly
#### EC-2: [Edge Case Name]
- [ ] BUG: Not handled (describe expected vs actual behavior)
### Security Audit Results
- [x] Authentication: Cannot access without login
- [x] Authorization: Users cannot access other users' data
- [x] Input validation: XSS attempts blocked
- [x] Rate limiting: Excessive requests handled
- [ ] BUG: [Security issue description]
### Bugs Found
#### BUG-1: [Bug Title]
- **Severity:** Critical | High | Medium | Low
- **Steps to Reproduce:**
1. Go to [page]
2. Do [action]
3. Expected: [what should happen]
4. Actual: [what actually happens]
- **Screenshot:** [if visual bug]
- **Priority:** Fix before deployment | Fix in next sprint | Nice to have
### Summary
- **Acceptance Criteria:** X/Y passed
- **Bugs Found:** N total (C critical, H high, M medium, L low)
- **Security:** [Pass / Issues found]
- **Production Ready:** YES / NO
- **Recommendation:** [Deploy / Fix bugs first]
```
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---
name: requirements
description: Create detailed feature specifications with user stories, acceptance criteria, and edge cases. Use when starting a new feature or initializing a new project.
argument-hint: [project-description or feature-idea]
user-invocable: true
allowed-tools: Read, Write, Edit, Glob, Grep, Bash, AskUserQuestion
model: sonnet
---
# Requirements Engineer
## Role
You are an experienced Requirements Engineer. Your job is to transform ideas into structured, testable specifications.
## Before Starting
1. Read `docs/PRD.md` to check if a project has been set up
2. Read `features/INDEX.md` to see existing features
**If the PRD is still the empty template** (contains placeholder text like "_Describe what you are building_"):
→ Go to **Init Mode** (new project setup)
**If the PRD is already filled out:**
→ Go to **Feature Mode** (add a single feature)
---
## INIT MODE: New Project Setup
Use this mode when the user provides a project description for the first time. The goal is to create the PRD AND break the project into individual feature specs in one go.
### Phase 1: Understand the Project
Ask the user interactive questions to clarify the big picture:
- What is the core problem this product solves?
- Who are the primary target users?
- What are the must-have features for MVP vs. nice-to-have?
- Are there existing tools/competitors? What's different here?
- Is a backend needed? (User accounts, data sync, multi-user)
- What are the constraints? (Timeline, budget, team size)
Use `AskUserQuestion` with clear single/multiple choice options.
### Phase 2: Create the PRD
Based on user answers, fill out `docs/PRD.md` with:
- **Vision:** Clear 2-3 sentence description of what and why
- **Target Users:** Who they are, their needs and pain points
- **Core Features (Roadmap):** Prioritized table (P0 = MVP, P1 = next, P2 = later)
- **Success Metrics:** How to measure if the product works
- **Constraints:** Timeline, budget, technical limitations
- **Non-Goals:** What is explicitly NOT being built
### Phase 3: Break Down into Features
Apply the Single Responsibility principle to split the roadmap into individual features:
- Each feature = ONE testable, deployable unit
- Identify dependencies between features
- Suggest a recommended build order (considering dependencies)
Present the feature breakdown to the user for review:
> "I've identified X features for your project. Here's the breakdown and recommended build order:"
### Phase 4: Create Feature Specs
For each feature (after user approval of the breakdown):
- Create a feature spec file using [template.md](template.md)
- Save to `/features/PROJ-X-feature-name.md`
- Include user stories, acceptance criteria, and edge cases
- Document dependencies on other features
### Phase 5: Update Tracking
- Update `features/INDEX.md` with ALL new features and their statuses
- Update the "Next Available ID" line
- Verify the PRD roadmap table matches the feature specs
### Phase 6: User Review
Present everything for final approval:
- PRD summary
- List of all feature specs created
- Recommended build order
- Suggested first feature to start with
### Init Mode Handoff
> "Project setup complete! I've created:
> - PRD at `docs/PRD.md`
> - X feature specs in `features/`
>
> Recommended first feature: PROJ-1 ([feature name])
> Next step: Run `/architecture` to design the technical approach for PROJ-1."
### Init Mode Git Commit
```
feat: Initialize project - PRD and X feature specifications
- Created PRD with vision, target users, and roadmap
- Created feature specs: PROJ-1 through PROJ-X
- Updated features/INDEX.md
```
---
## FEATURE MODE: Add a Single Feature
Use this mode when the project already has a PRD and the user wants to add a new feature.
### Phase 1: Understand the Feature
1. Check existing components: `git ls-files src/components/`
2. Check existing APIs: `git ls-files src/app/api/`
3. Ensure you are not duplicating an existing feature
Ask the user interactive questions to clarify:
- Who are the primary users of this feature?
- What are the must-have behaviors for MVP?
- What is the expected behavior for key interactions?
Use `AskUserQuestion` with clear single/multiple choice options.
### Phase 2: Clarify Edge Cases
Ask about edge cases with concrete options:
- What happens on duplicate data?
- How do we handle errors?
- What are the validation rules?
- What happens when the user is offline?
### Phase 3: Write Feature Spec
- Use the template from [template.md](template.md)
- Create the spec in `/features/PROJ-X-feature-name.md`
- Assign the next available PROJ-X ID from `features/INDEX.md`
### Phase 4: User Review
Present the spec and ask for approval:
- "Approved" → Spec is ready for architecture
- "Changes needed" → Iterate based on feedback
### Phase 5: Update Tracking
- Add the new feature to `features/INDEX.md`
- Set status to **Planned**
- Update the "Next Available ID" line
- Add the feature to the PRD roadmap table in `docs/PRD.md`
### Feature Mode Handoff
> "Feature spec is ready! Next step: Run `/architecture` to design the technical approach for this feature."
### Feature Mode Git Commit
```
feat(PROJ-X): Add feature specification for [feature name]
```
---
## CRITICAL: Feature Granularity (Single Responsibility)
Each feature file = ONE testable, deployable unit.
**Never combine:**
- Multiple independent functionalities in one file
- CRUD operations for different entities
- User functions + admin functions
- Different UI areas/screens
**Splitting rules:**
1. Can it be tested independently? → Own feature
2. Can it be deployed independently? → Own feature
3. Does it target a different user role? → Own feature
4. Is it a separate UI component/screen? → Own feature
**Document dependencies between features:**
```markdown
## Dependencies
- Requires: PROJ-1 (User Authentication) - for logged-in user checks
```
## Important
- NEVER write code - that is for Frontend/Backend skills
- NEVER create tech design - that is for the Architecture skill
- Focus: WHAT should the feature do (not HOW)
## Checklist Before Completion
### Init Mode
- [ ] User has answered all project-level questions
- [ ] PRD filled out completely (Vision, Users, Roadmap, Metrics, Constraints, Non-Goals)
- [ ] All features split according to Single Responsibility
- [ ] Dependencies between features documented
- [ ] All feature specs created with user stories, AC, and edge cases
- [ ] `features/INDEX.md` updated with all features
- [ ] Build order recommended
- [ ] User has reviewed and approved everything
### Feature Mode
- [ ] User has answered all feature questions
- [ ] At least 3-5 user stories defined
- [ ] Every acceptance criterion is testable (not vague)
- [ ] At least 3-5 edge cases documented
- [ ] Feature ID assigned (PROJ-X)
- [ ] File saved to `/features/PROJ-X-feature-name.md`
- [ ] `features/INDEX.md` updated
- [ ] PRD roadmap table updated with new feature
- [ ] User has reviewed and approved the spec
.claude/skills/requirements/template.md
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@@ -0,0 +1,36 @@
# PROJ-X: Feature Name
## Status: Planned
**Created:** YYYY-MM-DD
**Last Updated:** YYYY-MM-DD
## Dependencies
- None
## User Stories
- As a [user type], I want to [action] so that [goal]
## Acceptance Criteria
- [ ] Criterion 1
- [ ] Criterion 2
## Edge Cases
- What happens when...?
- How do we handle...?
## Technical Requirements (optional)
- Performance: < 200ms response time
- Security: Authentication required
- Browser Support: Chrome, Firefox, Safari
---
<!-- Sections below are added by subsequent skills -->
## Tech Design (Solution Architect)
_To be added by /architecture_
## QA Test Results
_To be added by /qa_
## Deployment
_To be added by /deploy_
.gitignore
+3
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@@ -31,6 +31,9 @@ yarn-error.log*
# vercel # vercel
.vercel .vercel
# claude code personal settings
.claude/settings.local.json
# typescript # typescript
*.tsbuildinfo *.tsbuildinfo
next-env.d.ts next-env.d.ts
CLAUDE.md
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@@ -0,0 +1,66 @@
# AI Coding Starter Kit
> A Next.js template with an AI-powered development workflow using specialized skills for Requirements, Architecture, Frontend, Backend, QA, and Deployment.
## Tech Stack
- **Framework:** Next.js 16 (App Router), TypeScript
- **Styling:** Tailwind CSS + shadcn/ui (copy-paste components)
- **Backend:** Supabase (PostgreSQL + Auth + Storage) - optional
- **Deployment:** Vercel
- **Validation:** Zod + react-hook-form
- **State:** React useState / Context API
## Project Structure
```
src/
app/ Pages (Next.js App Router)
components/
ui/ shadcn/ui components (NEVER recreate these)
hooks/ Custom React hooks
lib/ Utilities (supabase.ts, utils.ts)
features/ Feature specifications (PROJ-X-name.md)
INDEX.md Feature status overview
docs/
PRD.md Product Requirements Document
production/ Production guides (Sentry, security, performance)
```
## Development Workflow
1. `/requirements` - Create feature spec from idea
2. `/architecture` - Design tech architecture (PM-friendly, no code)
3. `/frontend` - Build UI components (shadcn/ui first!)
4. `/backend` - Build APIs, database, RLS policies
5. `/qa` - Test against acceptance criteria + security audit
6. `/deploy` - Deploy to Vercel + production-ready checks
## Feature Tracking
All features tracked in `features/INDEX.md`. Every skill reads it at start and updates it when done. Feature specs live in `features/PROJ-X-name.md`.
## Key Conventions
- **Feature IDs:** PROJ-1, PROJ-2, etc. (sequential)
- **Commits:** `feat(PROJ-X): description`, `fix(PROJ-X): description`
- **Single Responsibility:** One feature per spec file
- **shadcn/ui first:** NEVER create custom versions of installed shadcn components
- **Human-in-the-loop:** All workflows have user approval checkpoints
## Build & Test Commands
```bash
npm run dev # Development server (localhost:3000)
npm run build # Production build
npm run lint # ESLint
npm run start # Production server
```
## Product Context
@docs/PRD.md
## Feature Overview
@features/INDEX.md
HOW_TO_USE_AGENTS.md
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@@ -1,347 +0,0 @@
# Wie nutze ich die AI Agents?
## ⚠️ Wichtig: Das sind KEINE Claude Code Skills!
Die Agent-Files in `.claude/agents/` sind **keine registrierten Skills** im Claude Code System.
Du kannst sie **nicht** mit `/requirements-engineer` aufrufen.
## ✅ So nutzt du die Agents richtig:
### Methode 1: Referenziere die Agent-Files im Chat (Empfohlen)
```
Hey Claude, lies bitte die Datei .claude/agents/requirements-engineer.md
und handle genau nach diesen Anweisungen.
Ich möchte ein User-Authentifizierung Feature bauen.
[... beschreibe dein Feature ...]
```
**Warum funktioniert das?**
- Claude liest die Agent-Instructions
- Befolgt den Workflow (inkl. AskUserQuestion für interaktive Fragen!)
- Erstellt Output wie im Agent definiert
---
### Methode 2: Copy-Paste Agent-Instructions in Custom Prompts
1. Öffne `.claude/agents/requirements-engineer.md`
2. Kopiere den Inhalt
3. Erstelle einen eigenen Prompt:
```
Du bist ein Requirements Engineer. [paste Agent-Instructions]
Jetzt erstelle eine Feature Spec für: [deine Feature-Idee]
```
---
## 🎯 Best Practice Workflow
### Phase 1: Requirements
```markdown
Hey Claude, lies .claude/agents/requirements-engineer.md und handle danach.
Ich möchte ein Kanban-Board Feature für mein Projekt bauen.
User sollen Tasks zwischen Columns verschieben können (Drag & Drop).
```
**Claude wird:**
1. ✅ `AskUserQuestion` nutzen für interaktive Single/Multiple-Choice Fragen
2. ✅ Edge Cases klären (mit AskUserQuestion)
3. ✅ Feature Spec erstellen in `/features/PROJ-X.md`
4. ✅ Finale Approval fragen (mit AskUserQuestion)
---
### Phase 2: Architecture
```markdown
Hey Claude, lies .claude/agents/solution-architect.md und handle danach.
Lies die Feature Spec in /features/PROJ-1-kanban-board.md und
designe die Tech-Infrastruktur (Database Schema, Components, APIs).
```
**Claude wird:**
1. ✅ Feature Spec lesen
2. ✅ Fragen stellen (mit AskUserQuestion)
3. ✅ Database Schema + Component Tree + API Endpoints designen
4. ✅ Spec erweitern mit Tech-Design
---
### Phase 3: Implementation
```markdown
# Frontend:
Hey Claude, lies .claude/agents/frontend-dev.md und handle danach.
Lies /features/PROJ-1-kanban-board.md und baue die UI Components.
# Backend:
Hey Claude, lies .claude/agents/backend-dev.md und handle danach.
Lies /features/PROJ-1-kanban-board.md und baue die APIs + Database.
```
---
### Phase 4: Testing
```markdown
Hey Claude, lies .claude/agents/qa-engineer.md und handle danach.
Teste das Kanban-Board Feature gegen die Acceptance Criteria
in /features/PROJ-1-kanban-board.md.
```
---
### Phase 5: Deployment
```markdown
Hey Claude, lies .claude/agents/devops.md und handle danach.
Deploy das Projekt zu Vercel (Production).
```
---
## 💡 Pro-Tipps
### 1. Voice-First Development (empfohlen!)
Nutze Whispr Flow (oder Apple Dictation):
```
*Hotkey drücken, sprechen:*
"Hey Claude, lies bitte die Datei punkt claude slash agents slash
requirements engineer punkt md und handle genau danach.
Ich möchte ein Kanban-Board Feature bauen.
User sollen Tasks per Drag and Drop verschieben können.
Das Board soll drei Spalten haben: Todo, In Progress, Done.
Ein paar Details die mir wichtig sind:
- Mobile-friendly, also Touch-Support
- Real-time Updates wenn mehrere User gleichzeitig arbeiten
- Tasks sollen Priorities haben
Kannst du mit mir durchgehen, wie wir das am besten umsetzen?"
```
**Vorteil:**
- 3x schneller als Tippen
- Mehr Context automatisch
- Natürlicher Flow
---
### 2. Nutze Plan Mode für komplexe Features
Für größere Features:
```markdown
Hey Claude, bitte starte im Plan Mode.
Lies .claude/agents/requirements-engineer.md und erstelle
eine Feature Spec für [komplexes Feature].
```
**Plan Mode Benefits:**
- Claude exploriert Codebase zuerst
- Stellt durchdachte Fragen
- User approved Plan bevor Implementation
---
### 3. Agents in Serie nutzen
Ein Feature komplett durchbauen:
```markdown
Phase 1: Lies .claude/agents/requirements-engineer.md → Erstelle Spec
[Warte auf Output]
Phase 2: Lies .claude/agents/solution-architect.md → Designe Infrastruktur
[Warte auf Output]
Phase 3: Lies .claude/agents/frontend-dev.md → Baue UI
[Warte auf Output]
Phase 4: Lies .claude/agents/backend-dev.md → Baue APIs
[Warte auf Output]
Phase 5: Lies .claude/agents/qa-engineer.md → Teste
[Warte auf Output]
Phase 6: Lies .claude/agents/devops.md → Deploy
```
**Tipp:** Nutze `/clear` zwischen Phasen für bessere Performance!
---
## 🔄 Warum `.claude/agents/` statt `.claude/skills/`?
**Skills** sind registrierte Commands im Claude Code System (z.B. `/commit`, `/review-pr`).
**Agents** in diesem Template sind **Prompt-Templates** / **Role-Definitions**.
Sie sind **nicht** im System registriert, aber genauso mächtig wenn du sie referenzierst!
---
## ⚡ Quick Reference
| Agent | File | Wann nutzen? |
|-------|------|--------------|
| **Requirements Engineer** | `.claude/agents/requirements-engineer.md` | Feature-Idee → Spec |
| **Solution Architect** | `.claude/agents/solution-architect.md` | Spec → Tech-Design |
| **Frontend Developer** | `.claude/agents/frontend-dev.md` | Design → UI Components |
| **Backend Developer** | `.claude/agents/backend-dev.md` | Design → APIs + DB |
| **QA Engineer** | `.claude/agents/qa-engineer.md` | Implementation → Testing |
| **DevOps** | `.claude/agents/devops.md` | Tested → Production |
---
## 🎓 Beispiel: Kompletter Workflow
**Feature:** User-Authentifizierung
### 1. Requirements (5-10 Min)
```
Hey Claude, lies .claude/agents/requirements-engineer.md und handle danach.
Ich möchte User-Authentifizierung bauen.
```
**Claude antwortet mit AskUserQuestion:**
- Zielgruppe? (Single/Multiple-Choice)
- MVP Features? (Multiple-Choice: Email, Google OAuth, etc.)
- Session-Persistence? (Single-Choice: Ja/Nein/Remember Me)
- Edge Cases? (Was bei doppelter Email?)
**Output:** `/features/PROJ-1-user-authentication.md`
---
### 2. Architecture (5 Min)
```
Hey Claude, lies .claude/agents/solution-architect.md und handle danach.
Lies /features/PROJ-1-user-authentication.md und designe die Infrastruktur.
```
**Output:** Database Schema + Component Tree + API Endpoints
---
### 3. Frontend (15 Min)
```
Hey Claude, lies .claude/agents/frontend-dev.md und handle danach.
Lies /features/PROJ-1-user-authentication.md und baue die UI.
```
**Output:** Login Form, Signup Form, Password Reset Components
---
### 4. Backend (15 Min)
```
Hey Claude, lies .claude/agents/backend-dev.md und handle danach.
Lies /features/PROJ-1-user-authentication.md und baue die APIs.
```
**Output:** Supabase Migrations, RLS Policies, API Routes
---
### 5. Testing (10 Min)
```
Hey Claude, lies .claude/agents/qa-engineer.md und handle danach.
Teste PROJ-1 gegen Acceptance Criteria.
```
**Output:** Test-Report mit Bugs (falls vorhanden)
---
### 6. Deployment (5 Min)
```
Hey Claude, lies .claude/agents/devops.md und handle danach.
Deploy zu Vercel.
```
**Output:** Production URL
---
**Gesamt:** ~55 Minuten für production-ready Feature 🚀
---
## 🆘 Troubleshooting
### "Claude ignoriert die Agent-Instructions"
**Lösung:** Sei expliziter im Prompt:
```
Hey Claude, lies GENAU die Datei .claude/agents/requirements-engineer.md
und befolge ALLE Anweisungen darin, inklusive der Nutzung von AskUserQuestion!
```
---
### "AskUserQuestion wird nicht genutzt"
**Lösung:** Claude muss wissen, dass das Tool verfügbar ist:
```
Hey Claude, lies .claude/agents/requirements-engineer.md.
WICHTIG: Nutze das AskUserQuestion Tool für alle Fragen
(Single/Multiple-Choice statt Text-Fragen)!
```
---
### "Zu viele Fragen auf einmal"
**Lösung:** Claude sollte max. 3-4 Fragen pro AskUserQuestion Batch stellen.
Gib Feedback:
```
Bitte stelle nicht mehr als 3 Fragen gleichzeitig.
```
---
## ✅ Ready to start!
Probier es aus:
```
Hey Claude, lies .claude/agents/requirements-engineer.md und handle danach.
Ich möchte [deine Feature-Idee].
```
Viel Erfolg! 🚀
PROJECT_CONTEXT.md
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# AI Coding Starter Kit
> A Next.js template with an AI-powered development workflow using 6 specialized agents
## Vision
Build web applications faster with AI agents handling Requirements, Architecture, Development, QA, and Deployment. Each agent has clear responsibilities and a human-in-the-loop workflow for quality control.
---
## Aktueller Status
Template ready - Start by defining your first feature!
---
## Tech Stack
### Frontend
- **Framework:** Next.js 16 (App Router)
- **Sprache:** TypeScript
- **Styling:** Tailwind CSS
- **UI Library:** shadcn/ui (copy-paste components)
### Backend
- **Database:** Supabase (PostgreSQL with Auth)
- **State Management:** React useState / Context API
- **Data Fetching:** React Server Components / fetch
### Deployment
- **Hosting:** Vercel (oder Netlify)
---
## Features Roadmap
### Your Features Will Appear Here
Start by defining your first feature using the Requirements Engineer agent:
```
Read .claude/agents/requirements-engineer.md and create a feature spec for [your feature idea]
```
Example roadmap structure:
- [PROJ-1] Your First Feature → 🔵 Planned → [Spec](/features/PROJ-1-feature-name.md)
- [PROJ-2] Your Second Feature → ⚪ Backlog
---
## Status-Legende
- ⚪ Backlog (noch nicht gestartet)
- 🔵 Planned (Requirements geschrieben)
- 🟡 In Review (User reviewt)
- 🟢 In Development (Wird gebaut)
- ✅ Done (Live + getestet)
---
## Development Workflow
1. **Requirements Engineer** erstellt Feature Spec → User reviewt
2. **Solution Architect** designed Schema/Architecture → User approved
3. **PROJECT_CONTEXT.md** Roadmap updaten (Status: 🔵 Planned → 🟢 In Development)
4. **Frontend + Backend Devs** implementieren → User testet
5. **QA Engineer** führt Tests aus → Bugs werden gemeldet
6. **DevOps** deployed → Status: ✅ Done
---
## Environment Variables
For projects using Supabase:
```bash
NEXT_PUBLIC_SUPABASE_URL=your_supabase_url
NEXT_PUBLIC_SUPABASE_ANON_KEY=your_anon_key
```
See `.env.local.example` for full list.
---
## Agent-Team Verantwortlichkeiten
- **Requirements Engineer** (`.claude/agents/requirements-engineer.md`)
- Feature Specs in `/features` erstellen
- User Stories + Acceptance Criteria + Edge Cases
- **Solution Architect** (`.claude/agents/solution-architect.md`)
- Database Schema + Component Architecture designen
- Tech-Entscheidungen treffen
- **Frontend Developer** (`.claude/agents/frontend-dev.md`)
- UI Components bauen (React + Tailwind + shadcn/ui)
- Responsive Design + Accessibility
- **Backend Developer** (`.claude/agents/backend-dev.md`)
- Supabase Queries + Row Level Security Policies
- API Routes + Server-Side Logic
- **QA Engineer** (`.claude/agents/qa-engineer.md`)
- Features gegen Acceptance Criteria testen
- Bugs dokumentieren + priorisieren
- **DevOps** (`.claude/agents/devops.md`)
- Deployment zu Vercel
- Environment Variables verwalten
- Production-Ready Essentials (Error Tracking, Security Headers, Performance)
---
## Production-Ready Features
This template includes production-readiness guides integrated into the agents:
- **Error Tracking:** Sentry setup instructions (DevOps Agent)
- **Security Headers:** XSS/Clickjacking protection (DevOps Agent)
- **Performance:** Database indexing, query optimization (Backend Agent)
- **Input Validation:** Zod schemas for API safety (Backend Agent)
- **Caching:** Next.js caching strategies (Backend Agent)
All guides are practical and include code examples ready to copy-paste.
---
## Design Decisions
Document your architectural decisions here as your project evolves.
**Template:**
- **Why did we choose X over Y?**
→ Reason 1
→ Reason 2
---
## Folder Structure
```
ai-coding-starter-kit/
├── .claude/
│ └── agents/ ← 6 AI Agents (Requirements, Architect, Frontend, Backend, QA, DevOps)
├── features/ ← Feature Specs (Requirements Engineer creates these)
│ └── README.md ← Documentation on how to write feature specs
├── src/
│ ├── app/ ← Pages (Next.js App Router)
│ ├── components/ ← React Components
│ │ └── ui/ ← shadcn/ui components (add as needed)
│ └── lib/ ← Utility functions
│ ├── supabase.ts ← Supabase client (commented out by default)
│ └── utils.ts ← Helper functions
├── public/ ← Static files
├── PROJECT_CONTEXT.md ← This file - update as project grows
└── package.json
```
---
## Getting Started
1. **Install dependencies:**
```bash
npm install
```
2. **Setup Environment Variables (if using Supabase):**
```bash
cp .env.local.example .env.local
# Add your Supabase credentials
```
3. **Start development server:**
```bash
npm run dev
```
4. **Start using the AI Agent workflow:**
- Tell Claude to read `.claude/agents/requirements-engineer.md` and define your first feature
- Follow the workflow: Requirements → Architecture → Development → QA → Deployment
---
## Next Steps
1. **Define your first feature idea**
- Think about what you want to build
2. **Start with Requirements Engineer**
- Tell Claude: "Read .claude/agents/requirements-engineer.md and create a feature spec for [your idea]"
- The agent will ask clarifying questions and create a detailed spec
3. **Follow the AI Agent workflow**
- Requirements → Architecture → Development → QA → Deployment
- Each agent knows when to hand off to the next agent
4. **Track progress via Git**
- Feature specs in `/features/PROJ-X.md` show status (Planned → In Progress → Deployed)
- Git commits track all implementation details
- Use `git log --grep="PROJ-X"` to see feature history
---
**Built with AI Agent Team System + Claude Code**
README.md
+225 -206
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@@ -1,18 +1,8 @@
# AI Coding Starter Kit – Production-Ready Template # AI Coding Starter Kit
> **Build scalable, production-ready web apps faster** with AI agents handling Requirements, Architecture, Development, QA, and Deployment. > Build production-ready web apps faster with AI-powered Skills handling Requirements, Architecture, Development, QA, and Deployment.
This template includes everything you need for professional AI-powered development: This template uses [Claude Code](https://docs.anthropic.com/en/docs/claude-code) with modern Skills, Rules, and Sub-Agents to provide a complete AI-powered development workflow.
- ✅ **Next.js 16** (latest) with TypeScript + Tailwind CSS
- ✅ **6 Production-Ready AI Agents** (Requirements → Deployment)
- ✅ **Production Guides** (Error Tracking, Security, Performance, Scaling)
- ✅ **Feature Changelog System** (Agents know what already exists → Code Reuse)
- ✅ **PM-Friendly** (No code in specs, automatic handoffs between agents)
- ✅ **Supabase-Ready** (optional)
- ✅ **shadcn/ui-Ready** (add components as needed)
- ✅ **Vercel Deployment-Ready**
---
## Quick Start ## Quick Start
@@ -31,11 +21,11 @@ If you need a backend:
1. Create Supabase Project: [supabase.com](https://supabase.com) 1. Create Supabase Project: [supabase.com](https://supabase.com)
2. Copy `.env.local.example` to `.env.local` 2. Copy `.env.local.example` to `.env.local`
3. Add your Supabase credentials 3. Add your Supabase credentials
4. Activate Supabase Client in `src/lib/supabase.ts` (uncomment code) 4. Uncomment the Supabase client in `src/lib/supabase.ts`
**Skip this step** if you're building frontend-only (landing pages, portfolios, etc.) Skip this step if you're building frontend-only (landing pages, portfolios, etc.)
### 3. Start Development Server ### 3. Start Development
```bash ```bash
npm run dev npm run dev
@@ -43,121 +33,85 @@ npm run dev
Open [http://localhost:3000](http://localhost:3000) in your browser. Open [http://localhost:3000](http://localhost:3000) in your browser.
### 4. Use AI Agents ### 4. Initialize Your Project
⚠️ **Important:** Agents are **not Skills** – you can't call them with `/requirements-engineer`! Open Claude Code and describe your project. The `/requirements` skill automatically detects that this is a fresh project and enters **Init Mode**:
**How to use Agents:**
``` ```
Hey Claude, read .claude/agents/requirements-engineer.md and create a feature spec for [your idea]. /requirements I want to build a project management tool for small teams
where users can create projects, assign tasks, and track progress.
``` ```
**Full Guide:** See [HOW_TO_USE_AGENTS.md](HOW_TO_USE_AGENTS.md) The skill will:
1. Ask interactive questions to clarify your vision, target users, and MVP scope
2. Create your **Product Requirements Document** (`docs/PRD.md`)
3. Break the project into individual features (Single Responsibility)
4. Create all **feature specs** (`features/PROJ-1.md`, `PROJ-2.md`, etc.)
5. Update **feature tracking** (`features/INDEX.md`)
6. Recommend which feature to build first
**Available Agents:** You don't need to put everything in the first prompt - a brief description is enough. The skill asks follow-up questions interactively.
- `requirements-engineer.md` - Feature Specs with interactive questions
- `solution-architect.md` - PM-friendly Tech Design (no code snippets) ### 5. Build Features
- `frontend-dev.md` - UI Components + Automatic Backend/QA Handoff
- `backend-dev.md` - APIs + Database + **Performance Best Practices** After project initialization, build features one at a time using skills:
- `qa-engineer.md` - Testing + Regression Tests
- `devops.md` - Deployment + **Production-Ready Essentials** ```
/architecture Design the tech approach for features/PROJ-1-user-auth.md
/frontend Build the UI for features/PROJ-1-user-auth.md
/backend Build the API for features/PROJ-1-user-auth.md
/qa Test features/PROJ-1-user-auth.md
/deploy Deploy to Vercel
```
Each skill suggests the next step when it finishes. Handoffs are always user-initiated.
To add more features later, run `/requirements` again - it detects the existing PRD and adds a single feature.
--- ---
## Project Structure ## Available Skills
``` | Skill | Command | What It Does |
ai-coding-starter-kit/ |-------|---------|-------------|
├── .claude/ | Requirements Engineer | `/requirements` | Creates feature specs with user stories, acceptance criteria, edge cases |
│ └── agents/ ← 6 AI Agents (Production-Ready) | Solution Architect | `/architecture` | Designs PM-friendly tech architecture (no code, only high-level design) |
├── features/ ← Feature Specs (includes specs, test results, deployment status) | Frontend Developer | `/frontend` | Builds UI with React, Tailwind CSS, and shadcn/ui |
│ └── README.md | Backend Developer | `/backend` | Builds APIs, database schemas, RLS policies with Supabase |
├── src/ | QA Engineer | `/qa` | Tests features against acceptance criteria + security audit |
│ ├── app/ ← Pages (Next.js App Router) | DevOps | `/deploy` | Deploys to Vercel with production-ready checks |
│ │ ├── layout.tsx | Help | `/help` | Context-aware guide: shows where you are and what to do next |
│ │ ├── page.tsx
│ │ └── globals.css ### How Skills Work
│ ├── components/ ← React Components
│ │ └── ui/ ← shadcn/ui components (add as needed) - **Skills** are defined in `.claude/skills/` and auto-discovered by Claude Code
│ └── lib/ ← Utility functions - **Rules** in `.claude/rules/` are auto-applied based on file context (no manual loading)
│ ├── supabase.ts ← Supabase Client (commented out by default) - **Sub-Agents** run heavy tasks (frontend, backend, QA) in isolated contexts for cost efficiency
│ └── utils.ts - **CLAUDE.md** provides project context automatically at every session start
├── public/ ← Static files
├── PROJECT_CONTEXT.md ← Project Documentation (fill this out!)
├── TEMPLATE_CHANGELOG.md ← Template Version History (v1.0 - v1.3)
├── HOW_TO_USE_AGENTS.md ← Agent Usage Guide
├── .env.local.example ← Environment Variables Template
└── package.json
```
--- ---
## Production-Ready Features ⚡ ## Development Workflow
This template includes production-readiness guides integrated into the agents: ```
1. Define /requirements --> Feature spec in features/PROJ-X.md
### DevOps Agent includes: 2. Design /architecture --> Tech design added to feature spec
- **Error Tracking Setup** (Sentry) – 5-minute setup with code examples 3. Build /frontend --> UI components implemented
- **Security Headers** (XSS/Clickjacking Protection) – Copy-paste `next.config.js` /backend --> APIs + database (if needed)
- **Environment Variables Best Practices** – Secrets management 4. Test /qa --> Test results added to feature spec
- **Performance Monitoring** (Lighthouse) – Built-in Chrome DevTools 5. Ship /deploy --> Deployed to Vercel
### Backend Agent includes:
- **Database Indexing** – Make queries 10-100x faster
- **Query Optimization** – Avoid N+1 problems with Supabase joins
- **Caching Strategy** – Next.js `unstable_cache` examples
- **Input Validation** – Zod schemas for API safety
- **Rate Limiting** – Optional Upstash Redis setup
All guides are **practical** with **copy-paste code examples** – no theory!
---
## Agent-Team Workflow
### 1. Requirements Phase
```bash
# Tell Claude:
"Read .claude/agents/requirements-engineer.md and create a feature spec for [your idea]"
``` ```
Agent asks questions → You answer → Agent creates Feature Spec in `/features/PROJ-1-feature.md` ### Feature Tracking
### 2. Architecture Phase Features are tracked in `features/INDEX.md`:
```bash
# Tell Claude:
"Read .claude/agents/solution-architect.md and design the architecture for /features/PROJ-1-feature.md"
```
Agent designs PM-friendly Tech Design (no code!) → You review | ID | Feature | Status | Spec |
|----|---------|--------|------|
| PROJ-1 | User Login | Deployed | [Spec](features/PROJ-1-user-login.md) |
| PROJ-2 | Dashboard | In Progress | [Spec](features/PROJ-2-dashboard.md) |
### 3. Implementation Phase Every skill reads this file at start and updates it when done, preventing duplicate work.
```bash
# Frontend:
"Read .claude/agents/frontend-dev.md and implement /features/PROJ-1-feature.md"
# Backend (if using Supabase):
"Read .claude/agents/backend-dev.md and implement /features/PROJ-1-feature.md"
```
**Note:** Frontend Agent automatically checks if Backend is needed and hands off to QA when done!
### 4. Testing Phase
```bash
# Tell Claude:
"Read .claude/agents/qa-engineer.md and test /features/PROJ-1-feature.md"
```
Agent tests all Acceptance Criteria → Adds test results to feature spec
### 5. Deployment Phase
```bash
# Tell Claude:
"Read .claude/agents/devops.md and deploy to Vercel"
```
Agent guides you through deployment + Production-Ready setup (Error Tracking, Security, Performance)
--- ---
@@ -165,140 +119,205 @@ Agent guides you through deployment + Production-Ready setup (Error Tracking, Se
| Category | Tool | Why? | | Category | Tool | Why? |
|----------|------|------| |----------|------|------|
| **Framework** | Next.js 16 | React + Server Components + Routing | | **Framework** | Next.js 16 | React + Server Components + App Router |
| **Language** | TypeScript | Type Safety | | **Language** | TypeScript | Type safety |
| **Styling** | Tailwind CSS | Utility-First CSS | | **Styling** | Tailwind CSS | Utility-first CSS |
| **UI Library** | shadcn/ui | Copy-Paste Components | | **UI Library** | shadcn/ui | Copy-paste, customizable components |
| **Backend** | Supabase (optional) | PostgreSQL + Auth + Storage | | **Backend** | Supabase (optional) | PostgreSQL + Auth + Storage + Realtime |
| **Deployment** | Vercel | Zero-Config Next.js Hosting | | **Deployment** | Vercel | Zero-config Next.js hosting |
| **Error Tracking** | Sentry (optional) | Production Error Monitoring | | **Validation** | Zod | Runtime type validation |
--- ---
## Next Steps ## Project Structure
1. **Fill out PROJECT_CONTEXT.md** ```
- Define your vision ai-coding-starter-kit/
- Add features to roadmap +-- CLAUDE.md <-- Auto-loaded project context
+-- .claude/
2. **Build your first feature** | +-- settings.json <-- Team permissions (committed)
- Use Requirements Engineer for Feature Spec | +-- settings.local.json <-- Personal overrides (gitignored)
- Follow the Agent-Team workflow | +-- rules/ <-- Auto-applied coding rules
| | +-- general.md Git workflow, feature tracking
3. **Add shadcn/ui components** (as needed) | | +-- frontend.md shadcn/ui, component standards
```bash | | +-- backend.md RLS, validation, queries
npx shadcn@latest add button | | +-- security.md Secrets, headers, auth
npx shadcn@latest add card | +-- skills/ <-- Invocable workflows (/command)
# etc. | | +-- requirements/SKILL.md /requirements
| | +-- architecture/SKILL.md /architecture
| | +-- frontend/SKILL.md /frontend (runs as sub-agent)
| | +-- backend/SKILL.md /backend (runs as sub-agent)
| | +-- qa/SKILL.md /qa (runs as sub-agent)
| | +-- deploy/SKILL.md /deploy
| | +-- help/SKILL.md /help (lightweight, uses haiku)
| +-- agents/ <-- Sub-agent configs
| +-- frontend-dev.md Model, tools, limits
| +-- backend-dev.md
| +-- qa-engineer.md
+-- features/ <-- Feature specifications
| +-- INDEX.md Status tracking
| +-- README.md Spec format documentation
+-- docs/
| +-- PRD.md <-- Product Requirements Document
| +-- production/ <-- Production setup guides
| +-- error-tracking.md Sentry setup (5 min)
| +-- security-headers.md XSS/Clickjacking protection
| +-- performance.md Lighthouse, optimization
| +-- database-optimization.md Indexing, N+1, caching
| +-- rate-limiting.md Upstash Redis
+-- src/
| +-- app/ <-- Pages (Next.js App Router)
| +-- components/
| | +-- ui/ <-- shadcn/ui components (35+ installed)
| +-- hooks/ <-- Custom React hooks
| +-- lib/ <-- Utilities
+-- public/ <-- Static files
``` ```
4. **Production Setup** (first deployment) ---
- Follow DevOps Agent guides:
- Error Tracking (Sentry) – 5 minutes
- Security Headers (`next.config.js`) – Copy-paste
- Performance Check (Lighthouse) – Chrome DevTools
5. **Deploy** ## Getting Started
- Push to GitHub
- Connect with Vercel ### 1. Fill Out Your PRD
- Use DevOps Agent for deployment help
Define your product vision in `docs/PRD.md`:
- What are you building and why?
- Who are the target users?
- What features are on the roadmap?
### 2. Build Your First Feature
Run `/requirements` with your feature idea. The skill will:
- Ask interactive questions to clarify requirements
- Create a feature spec in `features/PROJ-1-name.md`
- Update `features/INDEX.md` with the new feature
- Suggest running `/architecture` as the next step
### 3. Add shadcn/ui Components (as needed)
35+ components are pre-installed. Add more as needed:
```bash
npx shadcn@latest add [component-name]
```
### 4. Production Setup (first deployment)
When you're ready to deploy, the `/deploy` skill guides you through:
- Vercel setup and deployment
- Error tracking with Sentry
- Security headers configuration
- Performance monitoring with Lighthouse
See `docs/production/` for detailed setup guides.
--- ---
## What's Included ## How It Works Under the Hood
### ✅ Works out-of-the-box ### Skills (`.claude/skills/`)
Each skill is a structured workflow that Claude Code discovers automatically. Skills can run inline (in the main conversation) or as forked sub-agents (isolated context, cheaper model).
- Next.js 16 with App Router | Skill | Execution | Why? |
- TypeScript (strict mode) |-------|-----------|------|
- Tailwind CSS (configured) | `/requirements` | Inline | Needs live interaction with user |
- ESLint 9 (Next.js defaults) | `/architecture` | Inline | Short output, user reviews in real-time |
- 6 Production-Ready AI Agents | `/frontend` | Sub-agent (forked) | Heavy file editing, lots of output |
- Feature Changelog System (Code-Reuse!) | `/backend` | Sub-agent (forked) | Heavy file editing, SQL, API code |
- Project Structure (best practices) | `/qa` | Sub-agent (forked) | Systematic testing, lots of output |
- Environment Variables Setup | `/deploy` | Inline | Deployment needs user oversight |
- .gitignore (Node modules, .env, etc.) | `/help` | Inline (haiku) | Lightweight status check, minimal cost |
### 📦 You add yourself ### Rules (`.claude/rules/`)
Coding standards that are auto-applied based on which files Claude is working with. No manual loading needed.
- shadcn/ui Components (as needed) ### Sub-Agent Configs (`.claude/agents/`)
- Supabase Setup (optional) Lightweight configurations that define model, tool access, and turn limits for forked skills.
- Your Features (with Agent-Team)
- Production Setup (Error Tracking, Security Headers) ### CLAUDE.md
Auto-loaded at every session start. Contains tech stack, conventions, and references to PRD and feature index.
--- ---
## Why This Template? ## Context Engineering
### For Product Managers AI agents work best with clean, structured context - not longer prompts. This template is designed around these principles:
- **No deep tech background needed** – Agents explain in PM-friendly language
- **Automatic handoffs** – Frontend → Backend Check → QA (no manual coordination)
- **Production-ready** – Security, Performance, Error Tracking included
### For Solo Founders ### State lives in files, not in memory
- **Build faster** – Agents handle Requirements → Deployment
- **Built for scale** – Database indexing, query optimization, caching
- **MVP to Production** – One template for both
### For Small Teams (2-5 people) Every skill reads `features/INDEX.md` and the relevant feature spec at start. After context compaction or a new session, nothing is lost - the agent simply re-reads the files. Progress tracking, acceptance criteria, and tech designs all live in markdown files, not in the conversation.
- **Consistent workflow** – Everyone follows the same agent system
- **Code reuse** – Git history shows what exists, prevents duplication ### Context is layered
- **Knowledge sharing** – All decisions documented in Feature Specs
Not everything is loaded at once. Information is layered by relevance:
| Layer | What | When loaded |
|-------|------|-------------|
| `CLAUDE.md` | Tech stack, conventions, commands | Every session (auto) |
| `.claude/rules/` | Coding standards | When editing matching files (auto) |
| Skill `SKILL.md` | Workflow instructions | When skill is invoked |
| Feature spec | Requirements, AC, tech design | On demand (skill reads it) |
| `docs/production/` | Deployment guides | Only when referenced |
### Context is isolated
Heavy implementation skills (`/frontend`, `/backend`, `/qa`) run as **forked sub-agents** with their own context window. Research noise from one skill doesn't pollute another. Each fork starts clean and loads only what it needs.
### Context recovery is built in
All forked skills include a **Context Recovery** section: if the context is compacted mid-task, the agent re-reads the feature spec, checks `git diff` for progress, and continues without restarting or duplicating work.
### Always read, never guess
A global rule (`rules/general.md`) enforces: always read a file before modifying it, never assume contents from memory, verify import paths and API routes by reading. This prevents hallucinated code references - the most common source of AI coding errors.
--- ---
## Documentation ## Customization for Your Team
### Template Docs This template is designed as a starting point. Customize it for your team:
- [HOW_TO_USE_AGENTS.md](HOW_TO_USE_AGENTS.md) – Agent usage guide
- [PROJECT_CONTEXT.md](PROJECT_CONTEXT.md) – Project documentation template
- [TEMPLATE_CHANGELOG.md](TEMPLATE_CHANGELOG.md) – Template version history
- [features/README.md](features/README.md) – Feature spec format
### External Docs 1. **Edit CLAUDE.md** - Add your project-specific conventions and build commands
- [Next.js Docs](https://nextjs.org/docs) 2. **Edit docs/PRD.md** - Define your product vision and roadmap
- [Tailwind CSS Docs](https://tailwindcss.com/docs) 3. **Edit .claude/rules/** - Adjust coding standards for your team
- [shadcn/ui Docs](https://ui.shadcn.com) 4. **Edit .claude/skills/** - Modify workflows to match your process
- [Supabase Docs](https://supabase.com/docs) 5. **Edit .claude/settings.json** - Configure team permissions
---
## Production Guides
Standalone guides in `docs/production/`:
| Guide | Setup Time | What It Does |
|-------|-----------|-------------|
| [Error Tracking](docs/production/error-tracking.md) | 5 min | Sentry integration for automatic error capture |
| [Security Headers](docs/production/security-headers.md) | 2 min | XSS, Clickjacking, MIME sniffing protection |
| [Performance](docs/production/performance.md) | 10 min | Lighthouse checks, image optimization, caching |
| [Database Optimization](docs/production/database-optimization.md) | 15 min | Indexing, N+1 prevention, query optimization |
| [Rate Limiting](docs/production/rate-limiting.md) | 10 min | Upstash Redis for API abuse prevention |
--- ---
## Scripts ## Scripts
```bash ```bash
npm run dev # Start development server (localhost:3000) npm run dev # Development server (localhost:3000)
npm run build # Production build npm run build # Production build
npm run start # Start production server npm run start # Production server
npm run lint # Run ESLint npm run lint # ESLint
``` ```
--- ---
## Template Versions ## Author
**Current:** v1.4.0 (Git-Based Workflow) Created by **Alex Sprogis** – AI Product Engineer & Content Creator.
See [TEMPLATE_CHANGELOG.md](TEMPLATE_CHANGELOG.md) for full version history. - [YouTube](https://www.youtube.com/@alex.sprogis)
- [Website](https://alexsprogis.de)
**Updates:**
- v1.4.0 – Git-Based Workflow (removed FEATURE_CHANGELOG, test-reports)
- v1.3.0 – Production-Ready Guides (Error Tracking, Security, Performance)
- v1.2.0 – Agent System Improvements (Interactive Questions, PM-Friendly Output)
- v1.1.0 – Enhanced Documentation
- v1.0.0 – Initial Release
--- ---
## License ## License
MIT License – feel free to use for your projects! MIT License - feel free to use for your projects!
---
**Built with AI Agent Team System + Claude Code** 🚀
Ready to build production-ready apps? Start with the Requirements Engineer!
```bash
"Read .claude/agents/requirements-engineer.md and create a feature spec for [your idea]"
```
TEMPLATE_CHANGELOG.md
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# Template Changelog
> Tracks changes to the **AI Coding Starter Kit Template** itself.
> For project features, use `FEATURE_CHANGELOG.md`.
---
## v1.4.3 (2026-01-16)
**Requirements Engineer: PROJECT_CONTEXT.md automatisch aktualisieren**
- Neue Phase 5: Nach Feature-Specs → PROJECT_CONTEXT.md updaten
- Aktualisiert: "Aktueller Status", "Features Roadmap", optional "Vision"
- Neuer Checklist-Punkt: "PROJECT_CONTEXT.md aktualisiert"
**Geändert:** `.claude/agents/requirements-engineer.md`
---
## v1.4.2 (2026-01-16)
**Frontend Developer: Design-Vorgaben abfragen**
- Neuer Workflow-Schritt: Prüfe ob Design-Mockups existieren
- Bei fehlenden Vorgaben: Frage nach Stil, Farben, Inspiration
- Nutzt `AskUserQuestion` für interaktive Abfrage
- Neue Checklist-Item: "Design-Vorgaben geklärt"
**Geändert:** `.claude/agents/frontend-dev.md`
---
## v1.4.1 (2026-01-16)
**Requirements Engineer: Feature-Granularität**
- Neuer Abschnitt "Single Responsibility" für Feature Specs
- Regel: Jedes Feature-File = EINE testbare Einheit
- Faustregeln für Aufteilung (5 Kriterien)
- Abhängigkeiten zwischen Features dokumentieren
**Geändert:** `.claude/agents/requirements-engineer.md`
---
## v1.4.0 (2026-01-15)
**Git-basierter Workflow (Vereinfachung)**
- `FEATURE_CHANGELOG.md` entfernt → Git-History ist Source of Truth
- Agents nutzen `git log` statt manuelle Changelogs
- Weniger Dateipflege, gleiche Übersicht
**Entfernt:** `FEATURE_CHANGELOG.md`
**Geändert:** Alle 6 Agent-Files
---
## v1.3.0 (2026-01-12)
**DevOps Agent: Production-Ready Guides**
- Error Tracking (Sentry)
- Security Headers
- Environment Variables Best Practices
- Performance Monitoring (Lighthouse)
- Production Checklist
**Backend Agent: Performance & Scalability**
- Database Indexing
- Query Optimization (N+1 Problem)
- Caching Strategy
- Input Validation (Zod)
- Rate Limiting
**QA Agent: Test Reports**
- Neuer Ordner `/test-reports/`
- Report-Format dokumentiert
**Geändert:** `devops.md`, `backend-dev.md`, `qa-engineer.md`, `README.md`
**Neu:** `test-reports/README.md`
---
## v1.2.0 (2026-01-10)
**Feature Changelog System**
- `FEATURE_CHANGELOG.md` für Feature-Tracking
- Alle 6 Agents prüfen bestehende Features
- Verhindert Duplikate, ermöglicht Code-Reuse
**Neu:** `FEATURE_CHANGELOG.md`
**Geändert:** Alle 6 Agent-Files
---
## v1.1.0 (2026-01-10)
**Agent System Improvements**
- `.claude/skills/` → `.claude/agents/` umbenannt
- Requirements Engineer nutzt `AskUserQuestion` Tool
- Interaktive Single/Multiple-Choice statt Freitext
**Neu:** `HOW_TO_USE_AGENTS.md`, `TEMPLATE_CHANGELOG.md`
**Geändert:** `requirements-engineer.md`, `README.md`, `PROJECT_CONTEXT.md`
---
## v1.0.0 (2026-01-10)
**Initial Release**
- Next.js 15 + TypeScript + Tailwind CSS
- 6 AI Agents mit Checklisten
- Supabase-Ready, shadcn/ui-Ready, Vercel-Ready
- PROJECT_CONTEXT.md Template
- Feature Specs System (`/features/PROJ-X.md`)
docs/PRD.md
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# Product Requirements Document
## Vision
_Describe what you are building and why._
## Target Users
_Who will use this product? Describe their needs and pain points._
## Core Features (Roadmap)
| Priority | Feature | Status |
|----------|---------|--------|
| P0 (MVP) | _Feature 1_ | Planned |
| P0 (MVP) | _Feature 2_ | Planned |
| P1 | _Feature 3_ | Planned |
| P2 | _Feature 4_ | Planned |
## Success Metrics
_How will you measure success? (e.g., user signups, retention, task completion rate)_
## Constraints
_Budget, timeline, technical limitations, team size._
## Non-Goals
_What are you explicitly NOT building in this version?_
---
Use `/requirements` to create detailed feature specifications for each item in the roadmap above.
docs/production/database-optimization.md
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# Database Optimization
## 1. Indexing
Create indexes on columns used in WHERE, ORDER BY, or JOIN clauses:
```sql
-- Without index: ~500ms at 100k rows
SELECT * FROM tasks WHERE user_id = 'abc123' ORDER BY created_at DESC;
-- After creating index: <10ms
CREATE INDEX idx_tasks_user_id_created ON tasks(user_id, created_at DESC);
```
**Rule of thumb:** If a column appears in WHERE or ORDER BY and the table will have >1000 rows, add an index.
Always include indexes in your migration SQL alongside CREATE TABLE.
## 2. Avoid N+1 Queries
The most common performance problem with ORMs and query builders:
```typescript
// Bad: N+1 (1 query for users + N queries for tasks)
const { data: users } = await supabase.from('users').select('*')
for (const user of users) {
const { data: tasks } = await supabase
.from('tasks')
.select('*')
.eq('user_id', user.id)
}
// Good: Single query with join (1 query total)
const { data } = await supabase
.from('users')
.select('*, tasks(*)')
```
## 3. Always Limit Results
Never return unbounded results from the database:
```typescript
// Bad: Returns ALL rows
const { data } = await supabase.from('tasks').select('*')
// Good: Returns max 50 rows
const { data } = await supabase.from('tasks').select('*').limit(50)
// Better: Paginated
const { data } = await supabase
.from('tasks')
.select('*')
.range(0, 49) // First 50 rows
```
## 4. Caching Strategy
For data that changes rarely (dashboard stats, config, categories):
```typescript
import { unstable_cache } from 'next/cache'
export const getCategories = unstable_cache(
async () => {
const { data } = await supabase.from('categories').select('*')
return data
},
['categories'], // Cache key
{ revalidate: 3600 } // Refresh every hour
)
```
**When to cache:**
- Data that changes less than once per hour
- Expensive aggregation queries
- Data shared across all users (not user-specific)
**When NOT to cache:**
- User-specific data that changes frequently
- Real-time data (use Supabase Realtime instead)
## 5. Select Only What You Need
```typescript
// Bad: Fetches all columns
const { data } = await supabase.from('users').select('*')
// Good: Fetches only needed columns
const { data } = await supabase.from('users').select('id, name, avatar_url')
```
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# Error Tracking Setup (Sentry)
Track production errors automatically so you know about issues before your users report them.
## Setup (5 minutes)
### 1. Create Sentry Account
- Go to [sentry.io](https://sentry.io) (free tier available for small apps)
- Create a new project and select "Next.js"
### 2. Install Next.js Integration
```bash
npx @sentry/wizard@latest -i nextjs
```
This automatically:
- Installs `@sentry/nextjs`
- Creates `sentry.client.config.ts` and `sentry.server.config.ts`
- Updates `next.config.ts` with Sentry webpack plugin
### 3. Add Environment Variables
Add to `.env.local` (local) and Vercel Dashboard (production):
```bash
SENTRY_DSN=https://xxx@xxx.ingest.sentry.io/xxx
NEXT_PUBLIC_SENTRY_DSN=https://xxx@xxx.ingest.sentry.io/xxx
SENTRY_AUTH_TOKEN=sntrys_xxx # For source maps upload
```
### 4. Verify Setup
Trigger a test error and check Sentry Dashboard:
```typescript
// Temporary test - remove after verification
throw new Error("Sentry test error")
```
## What You Get
- Automatic error capture (client + server)
- Stack traces with source maps
- Error grouping and deduplication
- Email alerts for new errors
- Performance monitoring (optional)
## Alternative
**Vercel Error Tracking** - Built-in, simpler, but fewer features. Available in Vercel Dashboard under "Monitoring".
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# Performance Monitoring
## Lighthouse Check (after every deployment)
1. Open Chrome DevTools (F12)
2. Go to Lighthouse tab
3. Select: Performance, Accessibility, Best Practices, SEO
4. Generate Report for both Mobile and Desktop
5. **Target: Score > 90** in all categories
## Common Performance Issues
### Unoptimized Images
```tsx
// Bad - unoptimized, no lazy loading
<img src="/large-image.jpg" />
// Good - Next.js Image component
import Image from 'next/image'
<Image src="/large-image.jpg" width={800} height={600} alt="Description" />
```
Next.js Image automatically: resizes, lazy-loads, serves WebP format.
### Large JavaScript Bundle
Use dynamic imports for heavy components that aren't needed on initial load:
```tsx
import dynamic from 'next/dynamic'
const HeavyChart = dynamic(() => import('./HeavyChart'), {
loading: () => <p>Loading chart...</p>,
})
```
### Missing Loading States
Always show feedback during data fetching:
```tsx
// Use shadcn Skeleton component
import { Skeleton } from "@/components/ui/skeleton"
if (isLoading) return <Skeleton className="h-12 w-full" />
```
### No Caching Strategy
Cache slow database queries with `unstable_cache`:
```typescript
import { unstable_cache } from 'next/cache'
export const getStats = unstable_cache(
async () => {
const { data } = await supabase.from('stats').select('*')
return data
},
['dashboard-stats'],
{ revalidate: 3600 } // Refresh every hour
)
```
## Quick Wins Checklist
- [ ] All images use `next/image` component
- [ ] Heavy components use dynamic imports
- [ ] Loading states show skeleton/spinner
- [ ] Fonts loaded with `next/font`
- [ ] No unnecessary client-side JavaScript (`"use client"` only when needed)
## Automated Monitoring
- **Vercel Analytics** - Automatic on Pro plan, shows Core Web Vitals
- **Vercel Speed Insights** - Real user performance data
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# Rate Limiting
Prevent abuse, DDoS attacks, and excessive API usage.
## When to Add Rate Limiting
- **MVP:** Optional (focus on features first)
- **Production with users:** Recommended on auth endpoints and public APIs
- **Public-facing APIs:** Required
## Setup with Upstash Redis
### 1. Install Dependencies
```bash
npm install @upstash/ratelimit @upstash/redis
```
### 2. Create Upstash Account
- Go to [upstash.com](https://upstash.com) (free tier: 10k requests/day)
- Create a Redis database
- Copy REST URL and token
### 3. Add Environment Variables
```bash
# .env.local
UPSTASH_REDIS_REST_URL=https://xxx.upstash.io
UPSTASH_REDIS_REST_TOKEN=xxx
```
### 4. Create Rate Limiter
```typescript
// src/lib/rate-limit.ts
import { Ratelimit } from '@upstash/ratelimit'
import { Redis } from '@upstash/redis'
export const ratelimit = new Ratelimit({
redis: Redis.fromEnv(),
limiter: Ratelimit.slidingWindow(10, '10 s'), // 10 requests per 10 seconds
})
```
### 5. Use in API Routes
```typescript
// src/app/api/example/route.ts
import { ratelimit } from '@/lib/rate-limit'
import { NextRequest, NextResponse } from 'next/server'
export async function POST(request: NextRequest) {
const ip = request.headers.get('x-forwarded-for') ?? 'anonymous'
const { success, limit, remaining } = await ratelimit.limit(ip)
if (!success) {
return NextResponse.json(
{ error: 'Too many requests' },
{
status: 429,
headers: {
'X-RateLimit-Limit': limit.toString(),
'X-RateLimit-Remaining': remaining.toString(),
},
}
)
}
// Process request normally...
}
```
### 6. Use in Middleware (Global)
```typescript
// middleware.ts
import { ratelimit } from '@/lib/rate-limit'
import { NextRequest, NextResponse } from 'next/server'
export async function middleware(request: NextRequest) {
// Only rate limit API routes
if (request.nextUrl.pathname.startsWith('/api/')) {
const ip = request.headers.get('x-forwarded-for') ?? 'anonymous'
const { success } = await ratelimit.limit(ip)
if (!success) {
return NextResponse.json({ error: 'Too Many Requests' }, { status: 429 })
}
}
}
export const config = {
matcher: '/api/:path*',
}
```
## Recommended Limits
| Endpoint Type | Limit | Window |
|--------------|-------|--------|
| Login/Register | 5 requests | 1 minute |
| Password Reset | 3 requests | 5 minutes |
| General API | 30 requests | 10 seconds |
| File Upload | 5 requests | 1 minute |
## Alternative
**Vercel Edge Config** - Simpler but less flexible. Built into Vercel, no external service needed.
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# Security Headers Configuration
Protect against XSS, Clickjacking, MIME sniffing, and other common web attacks.
## Setup
Add security headers to `next.config.ts`:
```typescript
import type { NextConfig } from 'next'
const nextConfig: NextConfig = {
async headers() {
return [
{
source: '/:path*',
headers: [
{
key: 'X-Frame-Options',
value: 'DENY',
},
{
key: 'X-Content-Type-Options',
value: 'nosniff',
},
{
key: 'Referrer-Policy',
value: 'origin-when-cross-origin',
},
{
key: 'Strict-Transport-Security',
value: 'max-age=31536000; includeSubDomains',
},
],
},
]
},
}
export default nextConfig
```
## What Each Header Does
| Header | Protection |
|--------|-----------|
| X-Frame-Options: DENY | Prevents your site from being embedded in iframes (clickjacking) |
| X-Content-Type-Options: nosniff | Prevents browsers from guessing content types (MIME sniffing) |
| Referrer-Policy | Controls how much URL info is sent to other sites |
| Strict-Transport-Security | Forces HTTPS connections |
## Verify After Deployment
1. Open Chrome DevTools
2. Go to Network tab
3. Click on any request to your site
4. Check Response Headers section
5. Verify all 4 headers are present
## Advanced (Optional)
**Content-Security-Policy (CSP)** - The most powerful header, but can break your app if misconfigured. Only add after thorough testing:
```
Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-inline'
```
Start with report-only mode first: `Content-Security-Policy-Report-Only`
features/INDEX.md
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# Feature Index
> Central tracking for all features. Updated by skills automatically.
## Status Legend
- **Planned** - Requirements written, ready for development
- **In Progress** - Currently being built
- **In Review** - QA testing in progress
- **Deployed** - Live in production
## Features
| ID | Feature | Status | Spec | Created |
|----|---------|--------|------|---------|
<!-- Add features above this line -->
## Next Available ID: PROJ-1