Phase 9 — Hardening & Polish
🏷️ Domain Focus
Cross-Domain Security: 🔒 Security hardening for all domains
Performance Validation: 🏪 eCommerce, 💬 Chat, 🏭 IoT, 📱 Social, 🧠 ML/AI
Architecture Reference: All domain architectures for security validation
Protocol Focus: 🔒 Multi-protocol security, 📊 Performance benchmarking
Objectives
- Security, performance baseline, and documentation polish
- Validate all 9 protocols work securely in production environment
- Complete protocol performance benchmarking and optimization
Deliverables
- Secrets/TLS; authZ checks; load test results; final docs
- Protocol security configuration and performance baselines
- Complete learning documentation with real-world examples
Tasks (acceptance)
1) Security with Protocol-Specific Hardening - [ ] Secrets mgmt; TLS (mkcert for local/dev) wired; authZ checks - [ ] Protocol Security Audit: Secure all communication channels - WebSocket authentication and rate limiting - gRPC TLS and mutual authentication - GraphQL query depth limiting and introspection disable - Kafka ACLs and SSL encryption - Webhook signature verification
2) Performance & cost with Protocol Benchmarking - [ ] Baseline load test run; high-level cost estimates - [ ] Protocol Performance Matrix: Benchmark all 9 protocols - Throughput comparison: REST vs gRPC vs GraphQL - Latency analysis: Sync vs async vs streaming protocols - Resource utilization: Reactive vs Virtual Threads under load - Cost analysis per protocol type and usage pattern
3) Docs & ADRs with Learning Outcomes Documentation - [ ] ADRs updated; docs reflect final state; screenshots where valuable - [ ] Protocol Learning Summary: Document key insights and lessons learned - When to use each protocol (decision matrix) - Performance characteristics and trade-offs - Implementation complexity and maintenance considerations - Real-world usage examples and anti-patterns
Dependencies - Phase 8
Learning & References - Reference Topics (Protocols & Concurrency) - ADRs
Next: Close out and plan the next milestone