tercul-backend/PRODUCTION-TASKS.md

# Tercul Backend - Production Readiness Tasks

**Last Updated:** December 2024
**Current Status:** Core features complete, production hardening in progress

> **Note:** This document tracks production readiness tasks. Some tasks may also be tracked in GitHub Issues.

---

## 📋 Quick Status Summary

### ✅ Fully Implemented
- **GraphQL API:** 100% of resolvers implemented and functional
- **Search:** Full Weaviate-based search with multi-class support, filtering, hybrid search
- **Authentication:** Complete auth system (register, login, JWT, password reset, email verification)
- **Background Jobs:** Sync jobs and linguistic analysis with proper error handling
- **Basic Observability:** Logging (zerolog), metrics (Prometheus), tracing (OpenTelemetry)
- **Architecture:** Clean CQRS/DDD architecture with proper DI
- **Testing:** Comprehensive test coverage with mocks

### ⚠️ Needs Production Hardening
- **Tracing:** Uses stdout exporter, needs OTLP for production
- **Metrics:** Missing GraphQL resolver metrics and business metrics
- **Caching:** No repository caching (only linguistics has caching)
- **DTOs:** Basic DTOs exist but need expansion
- **Configuration:** Still uses global singleton (`config.Cfg`)

### 📝 Documentation Status
- ✅ Basic API documentation exists (`api/README.md`)
- ✅ Project README updated
- ⚠️ Needs enhancement with examples and detailed usage patterns

---

## 📊 Current Reality Check

### ✅ What's Actually Working

- ✅ Full GraphQL API with 100% resolvers implemented (all queries and mutations functional)
- ✅ Complete CQRS pattern (Commands & Queries) with proper separation
- ✅ Auth system (Register, Login, JWT, Password Reset, Email Verification) - fully implemented
- ✅ Work CRUD with authorization
- ✅ Translation management with analytics
- ✅ User management and profiles
- ✅ Collections, Comments, Likes, Bookmarks
- ✅ Contributions with review workflow
- ✅ Analytics service (views, likes, trending) - basic implementation
- ✅ **Search functionality** - Fully implemented with Weaviate (multi-class search, filtering, hybrid search)
- ✅ Clean Architecture with DDD patterns
- ✅ Comprehensive test coverage (passing tests with mocks)
- ✅ Basic CI infrastructure (`make lint-test` target)
- ✅ Docker setup and containerization
- ✅ Database migrations with goose
- ✅ Background jobs (sync, linguistic analysis) with proper error handling
- ✅ Basic observability (logging with zerolog, Prometheus metrics, OpenTelemetry tracing)

### ⚠️ What Needs Work

- ⚠️ **Observability Production Hardening:** Tracing uses stdout exporter (needs OTLP), missing GraphQL/business metrics → **Issues #31, #32, #33**
- ⚠️ **Repository Caching:** No caching decorators for repositories (only linguistics has caching) → **Issue #34**
- ⚠️ **DTO Optimization:** Basic DTOs exist but need expansion for list vs detail views → **Issue #35**
- ⚠️ **Configuration Refactoring:** Still uses global `config.Cfg` singleton → **Issue #36**
- ⚠️ Production deployment automation → **Issue #36**
- ⚠️ Security hardening (rate limiting, security headers) → **Issue #37**
- ⚠️ Infrastructure as Code (Kubernetes manifests) → **Issue #38**

---

## 🎯 EPIC 1: Search & Discovery (COMPLETED ✅)

### Story 1.1: Full-Text Search Implementation

**Priority:** ✅ **COMPLETED**
**Status:** Fully implemented and functional

**Current Implementation:**

- ✅ Weaviate-based full-text search fully implemented
- ✅ Multi-class search (Works, Translations, Authors)
- ✅ Hybrid search mode (BM25 + Vector) with configurable alpha
- ✅ Support for filtering by language, tags, dates, authors
- ✅ Relevance-ranked results with pagination
- ✅ Search service in `internal/app/search/service.go`
- ✅ Weaviate client wrapper in `internal/platform/search/weaviate_wrapper.go`
- ✅ Search schema management in `internal/platform/search/schema.go`

**Remaining Enhancements:**

- [ ] Add incremental indexing on create/update operations (currently manual sync)
- [ ] Add search result caching (5 min TTL)
- [ ] Add search metrics and monitoring
- [ ] Performance optimization (target < 200ms for 95th percentile)
- [ ] Integration tests with real Weaviate instance

---

### Story 1.2: Advanced Search Filters

**Priority:** P1 (High)
**Estimate:** 5 story points (1-2 days)
**Labels:** `enhancement`, `search`, `backend`

**User Story:**

```
As a researcher or literary enthusiast,
I want to filter search results by multiple criteria simultaneously,
So that I can narrow down to exactly the works I'm interested in.
```

**Acceptance Criteria:**

- [ ] Filter by literature type (poetry, prose, drama)
- [ ] Filter by time period (creation date ranges)
- [ ] Filter by multiple authors simultaneously
- [ ] Filter by genre/categories
- [ ] Filter by language availability
- [ ] Combine filters with AND/OR logic
- [ ] Save search filters as presets (future)

**Technical Tasks:**

1. Extend `SearchFilters` domain model
2. Implement filter translation to Weaviate queries
3. Add faceted search capabilities
4. Implement filter validation
5. Add filter combination logic
6. Create filter preset storage (optional)
7. Add tests for all filter combinations

---

## 🎯 EPIC 2: API Documentation (HIGH PRIORITY)

### Story 2.1: Comprehensive GraphQL API Documentation

**Priority:** P1 (High)
**Estimate:** 5 story points (1-2 days)
**Labels:** `documentation`, `api`, `devex`

**User Story:**

```
As a frontend developer or API consumer,
I want complete documentation for all GraphQL queries and mutations,
So that I can integrate with the API without constantly asking questions.
```

**Acceptance Criteria:**

- [ ] Document all 80+ GraphQL resolvers
- [ ] Include example queries for each operation
- [ ] Document input types and validation rules
- [ ] Provide error response examples
- [ ] Document authentication requirements
- [ ] Include rate limiting information
- [ ] Add GraphQL Playground with example queries
- [ ] Auto-generate docs from schema annotations

**Technical Tasks:**

1. Add descriptions to all GraphQL types in schema
2. Document each query/mutation with examples
3. Create `api/README.md` with comprehensive guide
4. Add inline schema documentation
5. Set up GraphQL Voyager for schema visualization
6. Create API changelog
7. Add versioning documentation
8. Generate OpenAPI spec for REST endpoints (if any)

**Deliverables:**

- `api/README.md` - Complete API guide
- `api/EXAMPLES.md` - Query examples
- `api/CHANGELOG.md` - API version history
- Enhanced GraphQL schema with descriptions
- Interactive API explorer

---

### Story 2.2: Developer Onboarding Documentation

**Priority:** P1 (High)
**Estimate:** 3 story points (1 day)
**Labels:** `documentation`, `devex`

**User Story:**

```
As a new developer joining the project,
I want clear setup instructions and architecture documentation,
So that I can become productive quickly without extensive hand-holding.
```

**Acceptance Criteria:**

- [ ] Updated `README.md` with quick start guide
- [ ] Architecture diagrams and explanations
- [ ] Development workflow documentation
- [ ] Testing strategy documentation
- [ ] Contribution guidelines
- [ ] Code style guide
- [ ] Troubleshooting common issues

**Technical Tasks:**

1. Update root `README.md` with modern structure
2. Create `docs/ARCHITECTURE.md` with diagrams
3. Document CQRS and DDD patterns used
4. Create `docs/DEVELOPMENT.md` workflow guide
5. Document testing strategy in `docs/TESTING.md`
6. Create `CONTRIBUTING.md` guide
7. Add package-level `README.md` for complex packages

**Deliverables:**

- Refreshed `README.md`
- `docs/ARCHITECTURE.md`
- `docs/DEVELOPMENT.md`
- `docs/TESTING.md`
- `CONTRIBUTING.md`

---

## 🎯 EPIC 3: Observability & Monitoring (CRITICAL FOR PRODUCTION)

### Story 3.1: Distributed Tracing with OpenTelemetry

**Priority:** P0 (Critical)
**Estimate:** 5 story points (1-2 days)
**Labels:** `observability`, `monitoring`, `infrastructure`

**Current State:**
- ✅ OpenTelemetry SDK integrated
- ✅ Basic tracer provider exists in `internal/observability/tracing.go`
- ✅ HTTP middleware with tracing (`observability.TracingMiddleware`)
- ✅ Trace context propagation configured
- ⚠️ **Currently uses stdout exporter** (needs OTLP for production)
- ⚠️ Database query tracing not yet implemented
- ⚠️ GraphQL resolver tracing not yet implemented

**User Story:**

```
As a DevOps engineer monitoring production,
I want distributed tracing across all services and database calls,
So that I can quickly identify performance bottlenecks and errors.
```

**Acceptance Criteria:**

- [x] OpenTelemetry SDK integrated
- [x] Automatic trace context propagation
- [x] HTTP handlers instrumented
- [ ] All database queries traced (via GORM callbacks)
- [ ] All GraphQL resolvers traced
- [ ] Custom spans for business logic
- [ ] **Traces exported to OTLP collector** (currently stdout only)
- [ ] Integration with Jaeger/Tempo

**Technical Tasks:**

1. ✅ OpenTelemetry Go SDK dependencies (already added)
2. ✅ `internal/observability/tracing` package exists
3. ✅ HTTP middleware with auto-tracing
4. [ ] Add database query tracing via GORM callbacks
5. [ ] Instrument GraphQL execution
6. [ ] Add custom spans for slow operations
7. [ ] Set up trace sampling strategy
8. [ ] **Replace stdout exporter with OTLP exporter**
9. [ ] Add Jaeger to docker-compose for local dev
10. [ ] Document tracing best practices

**Configuration:**

```go
// Example trace configuration (needs implementation)
type TracingConfig struct {
    Enabled       bool
    ServiceName   string
    SamplingRate  float64
    OTLPEndpoint  string
}
```

---

### Story 3.2: Prometheus Metrics & Alerting

**Priority:** P0 (Critical)
**Estimate:** 3 story points (1 day)
**Labels:** `observability`, `monitoring`, `metrics`

**Current State:**
- ✅ Basic Prometheus metrics exist in `internal/observability/metrics.go`
- ✅ HTTP request metrics (latency, status codes)
- ✅ Database query metrics (query time, counts)
- ✅ Metrics exposed on `/metrics` endpoint
- ⚠️ Missing GraphQL resolver metrics
- ⚠️ Missing business metrics
- ⚠️ Missing system metrics

**User Story:**

```
As a site reliability engineer,
I want detailed metrics on API performance and system health,
So that I can detect issues before they impact users.
```

**Acceptance Criteria:**

- [x] HTTP request metrics (latency, status codes, throughput)
- [x] Database query metrics (query time, connection pool)
- [ ] Business metrics (works created, searches performed)
- [ ] System metrics (memory, CPU, goroutines)
- [ ] GraphQL-specific metrics (resolver performance)
- [x] Metrics exposed on `/metrics` endpoint
- [ ] Prometheus scraping configured
- [ ] Grafana dashboards created

**Technical Tasks:**

1. ✅ Prometheus middleware exists
2. ✅ HTTP handler metrics implemented
3. ✅ Database query duration histograms exist
4. [ ] Create business metric counters
5. [ ] Add GraphQL resolver metrics
6. [ ] Create custom metrics for critical paths
7. [ ] Set up metric labels strategy
8. [ ] Create Grafana dashboard JSON
9. [ ] Define SLOs and SLIs
10. [ ] Create alerting rules YAML

**Key Metrics:**

```
# HTTP Metrics
http_requests_total{method, path, status}
http_request_duration_seconds{method, path}

# Database Metrics
db_query_duration_seconds{query}
db_connections_current
db_connections_max

# Business Metrics
works_created_total{language}
searches_performed_total{type}
user_registrations_total

# GraphQL Metrics
graphql_resolver_duration_seconds{operation, resolver}
graphql_errors_total{operation, error_type}
```

---

### Story 3.3: Structured Logging Enhancements

**Priority:** P1 (High)
**Estimate:** 2 story points (0.5-1 day)
**Labels:** `observability`, `logging`

**Current State:**
- ✅ Structured logging with zerolog implemented
- ✅ Request ID middleware exists (`observability.RequestIDMiddleware`)
- ✅ Trace/Span IDs added to logger context (`Logger.Ctx()`)
- ✅ Logging middleware injects logger into context
- ⚠️ User ID not yet added to authenticated request logs
- ⚠️ Log sampling not implemented

**User Story:**

```
As a developer debugging production issues,
I want rich, structured logs with request context,
So that I can quickly trace requests and identify root causes.
```

**Acceptance Criteria:**

- [x] Request ID in all logs
- [ ] User ID in authenticated request logs
- [x] Trace ID/Span ID in all logs
- [ ] Consistent log levels across codebase (audit needed)
- [ ] Sensitive data excluded from logs
- [x] Structured fields for easy parsing
- [ ] Log sampling for high-volume endpoints

**Technical Tasks:**

1. ✅ HTTP middleware injects request ID
2. [ ] Add user ID to context from JWT in auth middleware
3. ✅ Trace/span IDs added to logger context
4. [ ] Audit all logging statements for consistency
5. [ ] Add field name constants for structured logging
6. [ ] Implement log redaction for passwords/tokens
7. [ ] Add log sampling configuration
8. [ ] Create log aggregation guide (ELK/Loki)

**Log Format Example:**

```json
{
  "level": "info",
  "ts": "2025-11-27T10:30:45.123Z",
  "msg": "Work created successfully",
  "request_id": "req_abc123",
  "user_id": "user_456",
  "trace_id": "trace_xyz789",
  "span_id": "span_def321",
  "work_id": 789,
  "language": "en",
  "duration_ms": 45
}
```

---

## 🎯 EPIC 4: Performance Optimization (MEDIUM PRIORITY)

### Story 4.1: Read Models (DTOs) for Efficient Queries

**Priority:** P1 (High)
**Estimate:** 6 story points (1-2 days)
**Labels:** `performance`, `architecture`, `refactoring`

**Current State:**
- ✅ Basic DTOs exist (`WorkDTO` in `internal/app/work/dto.go`)
- ✅ DTOs used in queries (`internal/app/work/queries.go`)
- ⚠️ DTOs are minimal (only ID, Title, Language)
- ⚠️ No distinction between list and detail DTOs
- ⚠️ Other aggregates don't have DTOs yet

**User Story:**

```
As an API consumer,
I want fast query responses with only the data I need,
So that my application loads quickly and uses less bandwidth.
```

**Acceptance Criteria:**

- [x] Basic DTOs created for work queries
- [ ] Create DTOs for all list queries (translation, author, user)
- [ ] DTOs include only fields needed by API
- [ ] Avoid N+1 queries with proper joins
- [ ] Reduce payload size by 30-50%
- [ ] Query response time improved by 20%
- [ ] No breaking changes to GraphQL schema

**Technical Tasks:**

1. ✅ `internal/app/work/dto.go` exists (basic)
2. [ ] Expand WorkDTO to WorkListDTO and WorkDetailDTO
3. [ ] Create TranslationListDTO, TranslationDetailDTO
4. [ ] Define AuthorListDTO, AuthorDetailDTO
5. [ ] Implement optimized SQL queries for DTOs with joins
6. [ ] Update query services to return expanded DTOs
7. [ ] Update GraphQL resolvers to map DTOs (if needed)
8. [ ] Add benchmarks comparing old vs new
9. [ ] Update tests to use DTOs
10. [ ] Document DTO usage patterns

**Example DTO (needs expansion):**

```go
// Current minimal DTO
type WorkDTO struct {
    ID       uint
    Title    string
    Language string
}

// Target: WorkListDTO - Optimized for list views
type WorkListDTO struct {
    ID              uint
    Title           string
    AuthorName      string
    AuthorID        uint
    Language        string
    CreatedAt       time.Time
    ViewCount       int
    LikeCount       int
    TranslationCount int
}

// Target: WorkDetailDTO - Full information for single work
type WorkDetailDTO struct {
    *WorkListDTO
    Content         string
    Description     string
    Tags            []string
    Categories      []string
    Translations    []TranslationSummaryDTO
    Author          AuthorSummaryDTO
    Analytics       WorkAnalyticsDTO
}
```

---

### Story 4.2: Redis Caching Strategy

**Priority:** P1 (High)
**Estimate:** 5 story points (1-2 days)
**Labels:** `performance`, `caching`, `infrastructure`

**Current State:**
- ✅ Redis client exists in `internal/platform/cache`
- ✅ Caching implemented for linguistics analysis (`internal/jobs/linguistics/analysis_cache.go`)
- ⚠️ **No repository caching** - `internal/data/cache` directory is empty
- ⚠️ No decorator pattern for repositories

**User Story:**

```
As a user browsing popular works,
I want instant page loads for frequently accessed content,
So that I have a smooth, responsive experience.
```

**Acceptance Criteria:**

- [ ] Cache hot works (top 100 viewed)
- [ ] Cache author profiles
- [ ] Cache search results (5 min TTL)
- [ ] Cache translations by work ID
- [ ] Automatic cache invalidation on updates
- [ ] Cache hit rate > 70% for reads
- [ ] Cache warming for popular content
- [ ] Redis failover doesn't break app

**Technical Tasks:**

1. [ ] Create `internal/data/cache` decorators
2. [ ] Create `CachedWorkRepository` decorator
3. [ ] Create `CachedAuthorRepository` decorator
4. [ ] Create `CachedTranslationRepository` decorator
5. [ ] Implement cache-aside pattern
6. [ ] Add cache key versioning strategy
7. [ ] Implement selective cache invalidation
8. [ ] Add cache metrics (hit/miss rates)
9. [ ] Create cache warming job
10. [ ] Handle cache failures gracefully
11. [ ] Document caching strategy
12. [ ] Add cache configuration

**Cache Key Strategy:**

```
work:{version}:{id}
author:{version}:{id}
translation:{version}:{work_id}:{lang}
search:{version}:{query_hash}
trending:{period}
```

---

### Story 4.3: Database Query Optimization

**Priority:** P2 (Medium)
**Estimate:** 5 story points (1-2 days)
**Labels:** `performance`, `database`

**User Story:**

```
As a user with slow internet,
I want database operations to complete quickly,
So that I don't experience frustrating delays.
```

**Acceptance Criteria:**

- [ ] All queries use proper indexes
- [ ] No N+1 query problems
- [ ] Eager loading for related entities
- [ ] Query time < 50ms for 95th percentile
- [ ] Connection pool properly sized
- [ ] Slow query logging enabled
- [ ] Query explain plans documented

**Technical Tasks:**

1. Audit all repository queries
2. Add missing database indexes
3. Implement eager loading with GORM Preload
4. Fix N+1 queries in GraphQL resolvers
5. Optimize joins and subqueries
6. Add query timeouts
7. Configure connection pool settings
8. Enable PostgreSQL slow query log
9. Create query performance dashboard
10. Document query optimization patterns

---

## 🎯 EPIC 5: Deployment & DevOps (CRITICAL FOR PRODUCTION)

### Story 5.1: Production Deployment Automation

**Priority:** P0 (Critical)
**Estimate:** 8 story points (2-3 days)
**Labels:** `devops`, `deployment`, `infrastructure`

**User Story:**

```
As a DevOps engineer,
I want automated, zero-downtime deployments to production,
So that we can ship features safely and frequently.
```

**Acceptance Criteria:**

- [ ] Automated deployment on tag push
- [ ] Blue-green or rolling deployment strategy
- [ ] Health checks before traffic routing
- [ ] Automatic rollback on failures
- [ ] Database migrations run automatically
- [ ] Smoke tests after deployment
- [ ] Deployment notifications (Slack/Discord)
- [ ] Deployment dashboard

**Technical Tasks:**

1. Complete `.github/workflows/deploy.yml` implementation
2. Set up staging environment
3. Implement blue-green deployment strategy
4. Add health check endpoints (`/health`, `/ready`)
5. Create database migration runner
6. Add pre-deployment smoke tests
7. Configure load balancer for zero-downtime
8. Set up deployment notifications
9. Create rollback procedures
10. Document deployment process

**Health Check Endpoints:**

```go
GET /health       -> {"status": "ok", "version": "1.2.3"}
GET /ready        -> {"ready": true, "db": "ok", "redis": "ok"}
GET /metrics      -> Prometheus metrics
```

---

### Story 5.2: Infrastructure as Code (Kubernetes)

**Priority:** P1 (High)
**Estimate:** 8 story points (2-3 days)
**Labels:** `devops`, `infrastructure`, `k8s`

**User Story:**

```
As a platform engineer,
I want all infrastructure defined as code,
So that environments are reproducible and version-controlled.
```

**Acceptance Criteria:**

- [ ] Kubernetes manifests for all services
- [ ] Helm charts for easy deployment
- [ ] ConfigMaps for configuration
- [ ] Secrets management with sealed secrets
- [ ] Horizontal Pod Autoscaling configured
- [ ] Ingress with TLS termination
- [ ] Persistent volumes for PostgreSQL/Redis
- [ ] Network policies for security

**Technical Tasks:**

1. Enhance `deploy/k8s` manifests
2. Create Deployment YAML for backend
3. Create Service and Ingress YAMLs
4. Create ConfigMap for app configuration
5. Set up Sealed Secrets for sensitive data
6. Create HorizontalPodAutoscaler
7. Add resource limits and requests
8. Create StatefulSets for databases
9. Set up persistent volume claims
10. Create Helm chart structure
11. Document Kubernetes deployment

**File Structure:**

```
deploy/k8s/
├── base/
│   ├── deployment.yaml
│   ├── service.yaml
│   ├── ingress.yaml
│   ├── configmap.yaml
│   └── hpa.yaml
├── overlays/
│   ├── staging/
│   └── production/
└── helm/
    └── tercul-backend/
        ├── Chart.yaml
        ├── values.yaml
        └── templates/
```

---

### Story 5.3: Disaster Recovery & Backups

**Priority:** P1 (High)
**Estimate:** 5 story points (1-2 days)
**Labels:** `devops`, `backup`, `disaster-recovery`

**User Story:**

```
As a business owner,
I want automated backups and disaster recovery procedures,
So that we never lose user data or have extended outages.
```

**Acceptance Criteria:**

- [ ] Daily PostgreSQL backups
- [ ] Point-in-time recovery capability
- [ ] Backup retention policy (30 days)
- [ ] Backup restoration tested monthly
- [ ] Backup encryption at rest
- [ ] Off-site backup storage
- [ ] Disaster recovery runbook
- [ ] RTO < 1 hour, RPO < 15 minutes

**Technical Tasks:**

1. Set up automated database backups
2. Configure WAL archiving for PostgreSQL
3. Implement backup retention policy
4. Store backups in S3/GCS with encryption
5. Create backup restoration script
6. Test restoration procedure
7. Create disaster recovery runbook
8. Set up backup monitoring and alerts
9. Document backup procedures
10. Schedule regular DR drills

---

## 🎯 EPIC 6: Security Hardening (HIGH PRIORITY)

### Story 6.1: Security Audit & Vulnerability Scanning

**Priority:** P0 (Critical)
**Estimate:** 5 story points (1-2 days)
**Labels:** `security`, `compliance`

**User Story:**

```
As a security officer,
I want continuous vulnerability scanning and security best practices,
So that user data and the platform remain secure.
```

**Acceptance Criteria:**

- [ ] Dependency scanning with Dependabot (already active)
- [ ] SAST scanning with CodeQL
- [ ] Container scanning with Trivy
- [ ] No high/critical vulnerabilities
- [ ] Security headers configured
- [ ] Rate limiting on all endpoints
- [ ] Input validation on all mutations
- [ ] SQL injection prevention verified

**Technical Tasks:**

1. Review existing security workflows (already good!)
2. Add rate limiting middleware
3. Implement input validation with go-playground/validator
4. Add security headers middleware
5. Audit SQL queries for injection risks
6. Review JWT implementation for best practices
7. Add CSRF protection for mutations
8. Implement request signing for sensitive operations
9. Create security incident response plan
10. Document security practices

**Security Headers:**

```
X-Frame-Options: DENY
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Strict-Transport-Security: max-age=31536000
Content-Security-Policy: default-src 'self'
```

---

### Story 6.2: API Rate Limiting & Throttling

**Priority:** P1 (High)
**Estimate:** 3 story points (1 day)
**Labels:** `security`, `performance`, `api`

**User Story:**

```
As a platform operator,
I want rate limiting to prevent abuse and ensure fair usage,
So that all users have a good experience and our infrastructure isn't overwhelmed.
```

**Acceptance Criteria:**

- [ ] Rate limiting per user (authenticated)
- [ ] Rate limiting per IP (anonymous)
- [ ] Different limits for different operations
- [ ] 429 status code with retry-after header
- [ ] Rate limit info in response headers
- [ ] Configurable rate limits
- [ ] Redis-based distributed rate limiting
- [ ] Rate limit metrics and monitoring

**Technical Tasks:**

1. Implement rate limiting middleware
2. Use redis for distributed rate limiting
3. Configure different limits for read/write
4. Add rate limit headers to responses
5. Create rate limit exceeded error handling
6. Add rate limit bypass for admins
7. Monitor rate limit usage
8. Document rate limits in API docs
9. Add tests for rate limiting
10. Create rate limit dashboard

**Rate Limits:**

```
Authenticated Users:
- 1000 requests/hour (general)
- 100 writes/hour (mutations)
- 10 searches/minute

Anonymous Users:
- 100 requests/hour
- 10 writes/hour
- 5 searches/minute
```

---

## 🎯 EPIC 7: Developer Experience (MEDIUM PRIORITY)

### Story 7.1: Local Development Environment Improvements

**Priority:** P2 (Medium)
**Estimate:** 3 story points (1 day)
**Labels:** `devex`, `tooling`

**User Story:**

```
As a developer,
I want a fast, reliable local development environment,
So that I can iterate quickly without friction.
```

**Acceptance Criteria:**

- [ ] One-command setup (`make setup`)
- [ ] Hot reload for Go code changes
- [ ] Database seeding with realistic data
- [ ] GraphQL Playground pre-configured
- [ ] All services start reliably
- [ ] Clear error messages when setup fails
- [ ] Development docs up-to-date

**Technical Tasks:**

1. Create comprehensive `make setup` target
2. Add air for hot reload in docker-compose
3. Create database seeding script
4. Add sample data fixtures
5. Pre-configure GraphQL Playground
6. Add health check script
7. Improve error messages in Makefile
8. Document common setup issues
9. Create troubleshooting guide
10. Add setup validation script

---

### Story 7.2: Testing Infrastructure Improvements

**Priority:** P2 (Medium)
**Estimate:** 5 story points (1-2 days)
**Labels:** `testing`, `devex`

**User Story:**

```
As a developer writing tests,
I want fast, reliable test execution without external dependencies,
So that I can practice TDD effectively.
```

**Acceptance Criteria:**

- [ ] Unit tests run in <5 seconds
- [ ] Integration tests isolated with test containers
- [ ] Parallel test execution
- [ ] Test coverage reports
- [ ] Fixtures for common test scenarios
- [ ] Clear test failure messages
- [ ] Easy to run single test or package

**Technical Tasks:**

1. Refactor `internal/testutil` for better isolation
2. Implement test containers for integration tests
3. Add parallel test execution
4. Create reusable test fixtures
5. Set up coverage reporting
6. Add golden file testing utilities
7. Create test data builders
8. Improve test naming conventions
9. Document testing best practices
10. Add `make test-fast` and `make test-all`

---

## 📋 Task Summary & Prioritization

### Sprint 1 (Week 1): Critical Production Readiness

1. **Search Implementation** (Story 1.1) - 8 pts
2. **Distributed Tracing** (Story 3.1) - 8 pts
3. **Prometheus Metrics** (Story 3.2) - 5 pts
4. **Total:** 21 points

### Sprint 2 (Week 2): Performance & Documentation

1. **API Documentation** (Story 2.1) - 5 pts
2. **Read Models/DTOs** (Story 4.1) - 8 pts
3. **Redis Caching** (Story 4.2) - 5 pts
4. **Structured Logging** (Story 3.3) - 3 pts
5. **Total:** 21 points

### Sprint 3 (Week 3): Deployment & Security

1. **Production Deployment** (Story 5.1) - 8 pts
2. **Security Audit** (Story 6.1) - 5 pts
3. **Rate Limiting** (Story 6.2) - 3 pts
4. **Developer Docs** (Story 2.2) - 3 pts
5. **Total:** 19 points

### Sprint 4 (Week 4): Infrastructure & Polish

1. **Kubernetes IaC** (Story 5.2) - 8 pts
2. **Disaster Recovery** (Story 5.3) - 5 pts
3. **Advanced Search Filters** (Story 1.2) - 5 pts
4. **Total:** 18 points

### Sprint 5 (Week 5): Optimization & DevEx

1. **Database Optimization** (Story 4.3) - 5 pts
2. **Local Dev Environment** (Story 7.1) - 3 pts
3. **Testing Infrastructure** (Story 7.2) - 5 pts
4. **Total:** 13 points

## 🎯 Success Metrics

### Performance SLOs

- API response time p95 < 200ms
- Search response time p95 < 300ms
- Database query time p95 < 50ms
- Cache hit rate > 70%

### Reliability SLOs

- Uptime > 99.9% (< 8.7 hours downtime/year)
- Error rate < 0.1%
- Mean Time To Recovery < 1 hour
- Zero data loss

### Developer Experience

- Setup time < 15 minutes
- Test suite runs < 2 minutes
- Build time < 1 minute
- Documentation completeness > 90%

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**Next Steps:**

1. Review and prioritize these tasks with the team
2. Create GitHub issues for Sprint 1 tasks
3. Add tasks to project board
4. Begin implementation starting with search and observability

**This is a realistic, achievable roadmap based on the ACTUAL current state of the codebase!** 🚀