HAP Analysis: Archive docs and create implementation action plan
- Archive all existing markdown documentation files - Create comprehensive HAP_ACTION_PLAN.md with: * Analysis of current BZZZ implementation vs HAP vision * 4-phase implementation strategy * Structural reorganization approach (multi-binary) * HAP interface implementation roadmap - Preserve existing functionality while adding human agent portal - Focus on incremental migration over rewrite 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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anthonyrawlins
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archive/PHASE2_HYBRID_ARCHITECTURE.md
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archive/PHASE2_HYBRID_ARCHITECTURE.md
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# Phase 2 Hybrid Architecture - BZZZ-RUSTLE Integration
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## Overview
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Phase 2 introduces a hybrid system where real implementations can be selectively activated while maintaining mock fallbacks. This approach allows gradual transition from mock to production components with zero-downtime deployment and easy rollback capabilities.
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## Architecture Principles
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### 1. Feature Flag System
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- **Environment-based configuration**: Use environment variables and config files
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- **Runtime switching**: Components can be switched without recompilation
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- **Graceful degradation**: Automatic fallback to mock when real components fail
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- **A/B testing**: Support for partial rollouts and testing scenarios
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### 2. Interface Compatibility
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- **Identical APIs**: Real implementations must match mock interfaces exactly
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- **Transparent switching**: Client code unaware of backend implementation
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- **Consistent behavior**: Same semantics across mock and real implementations
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- **Error handling**: Unified error types and recovery mechanisms
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### 3. Deployment Strategy
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- **Progressive rollout**: Enable real components incrementally
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- **Feature toggles**: Individual component activation control
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- **Monitoring integration**: Health checks and performance metrics
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- **Rollback capability**: Instant fallback to stable mock components
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## Component Architecture
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### BZZZ Hybrid Components
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#### 1. DHT Backend (Priority 1)
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```go
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// pkg/dht/hybrid_dht.go
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type HybridDHT struct {
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mockDHT *MockDHT
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realDHT *LibP2PDHT
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config *HybridConfig
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fallback bool
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}
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type HybridConfig struct {
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UseRealDHT bool `env:"BZZZ_USE_REAL_DHT" default:"false"`
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DHTBootstrapNodes []string `env:"BZZZ_DHT_BOOTSTRAP_NODES"`
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FallbackOnError bool `env:"BZZZ_FALLBACK_ON_ERROR" default:"true"`
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HealthCheckInterval time.Duration `env:"BZZZ_HEALTH_CHECK_INTERVAL" default:"30s"`
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}
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```
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**Real Implementation Features**:
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- libp2p-based distributed hash table
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- Bootstrap node discovery
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- Peer-to-peer replication
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- Content-addressed storage
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- Network partition tolerance
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#### 2. UCXL Address Resolution (Priority 2)
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```go
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// pkg/ucxl/hybrid_resolver.go
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type HybridResolver struct {
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localCache map[string]*UCXLAddress
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dhtResolver *DHTResolver
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config *ResolverConfig
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}
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type ResolverConfig struct {
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CacheEnabled bool `env:"BZZZ_CACHE_ENABLED" default:"true"`
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CacheTTL time.Duration `env:"BZZZ_CACHE_TTL" default:"5m"`
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UseDistributed bool `env:"BZZZ_USE_DISTRIBUTED_RESOLVER" default:"false"`
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}
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```
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#### 3. Peer Discovery (Priority 3)
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```go
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// pkg/discovery/hybrid_discovery.go
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type HybridDiscovery struct {
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mdns *MDNSDiscovery
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dht *DHTDiscovery
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announce *AnnounceDiscovery
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config *DiscoveryConfig
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}
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```
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### RUSTLE Hybrid Components
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#### 1. BZZZ Connector (Priority 1)
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```rust
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// src/hybrid_bzzz.rs
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pub struct HybridBZZZConnector {
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mock_connector: MockBZZZConnector,
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real_connector: Option<RealBZZZConnector>,
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config: HybridConfig,
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health_monitor: HealthMonitor,
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}
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#[derive(Debug, Clone)]
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pub struct HybridConfig {
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pub use_real_connector: bool,
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pub bzzz_endpoints: Vec<String>,
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pub fallback_enabled: bool,
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pub timeout_ms: u64,
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pub retry_attempts: u8,
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}
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```
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#### 2. Network Layer (Priority 2)
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```rust
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// src/network/hybrid_network.rs
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pub struct HybridNetworkLayer {
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mock_network: MockNetwork,
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libp2p_network: Option<LibP2PNetwork>,
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config: NetworkConfig,
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}
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```
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## Feature Flag Implementation
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### Environment Configuration
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```bash
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# BZZZ Configuration
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export BZZZ_USE_REAL_DHT=true
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export BZZZ_DHT_BOOTSTRAP_NODES="192.168.1.100:8080,192.168.1.101:8080"
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export BZZZ_FALLBACK_ON_ERROR=true
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export BZZZ_USE_DISTRIBUTED_RESOLVER=false
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# RUSTLE Configuration
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export RUSTLE_USE_REAL_CONNECTOR=true
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export RUSTLE_BZZZ_ENDPOINTS="http://192.168.1.100:8080,http://192.168.1.101:8080"
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export RUSTLE_FALLBACK_ENABLED=true
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export RUSTLE_TIMEOUT_MS=5000
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```
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### Configuration Files
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```yaml
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# config/hybrid.yaml
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bzzz:
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dht:
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enabled: true
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backend: "real" # mock, real, hybrid
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bootstrap_nodes:
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- "192.168.1.100:8080"
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- "192.168.1.101:8080"
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fallback:
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enabled: true
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threshold_errors: 3
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backoff_ms: 1000
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rustle:
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connector:
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enabled: true
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backend: "real" # mock, real, hybrid
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endpoints:
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- "http://192.168.1.100:8080"
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- "http://192.168.1.101:8080"
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fallback:
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enabled: true
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timeout_ms: 5000
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```
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## Implementation Phases
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### Phase 2.1: Foundation Components (Week 1)
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**Priority**: Infrastructure and core interfaces
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**BZZZ Tasks**:
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1. ✅ Create hybrid DHT interface with feature flags
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2. ✅ Implement libp2p-based real DHT backend
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3. ✅ Add health monitoring and fallback logic
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4. ✅ Create hybrid configuration system
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**RUSTLE Tasks**:
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1. ✅ Create hybrid BZZZ connector interface
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2. ✅ Implement real HTTP/WebSocket connector
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3. ✅ Add connection pooling and retry logic
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4. ✅ Create health monitoring system
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### Phase 2.2: Service Discovery (Week 2)
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**Priority**: Network topology and peer discovery
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**BZZZ Tasks**:
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1. ✅ Implement mDNS local discovery
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2. ✅ Add DHT-based peer discovery
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3. ✅ Create announce channel system
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4. ✅ Add service capability advertisement
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**RUSTLE Tasks**:
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1. ✅ Implement service discovery client
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2. ✅ Add automatic endpoint resolution
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3. ✅ Create connection failover logic
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4. ✅ Add load balancing for multiple endpoints
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### Phase 2.3: Data Synchronization (Week 3)
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**Priority**: Consistent state management
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**BZZZ Tasks**:
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1. ✅ Implement distributed state synchronization
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2. ✅ Add conflict resolution mechanisms
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3. ✅ Create eventual consistency guarantees
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4. ✅ Add data versioning and merkle trees
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**RUSTLE Tasks**:
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1. ✅ Implement local caching with invalidation
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2. ✅ Add optimistic updates with rollback
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3. ✅ Create subscription-based updates
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4. ✅ Add offline mode with sync-on-reconnect
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## Testing Strategy
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### Integration Test Matrix
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| Component | Mock | Real | Hybrid | Failure Scenario |
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|-----------|------|------|--------|------------------|
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| BZZZ DHT | ✅ | ✅ | ✅ | ✅ |
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| RUSTLE Connector | ✅ | ✅ | ✅ | ✅ |
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| Peer Discovery | ✅ | ✅ | ✅ | ✅ |
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| State Sync | ✅ | ✅ | ✅ | ✅ |
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### Test Scenarios
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1. **Pure Mock**: All components using mock implementations
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2. **Pure Real**: All components using real implementations
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3. **Mixed Hybrid**: Some mock, some real components
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4. **Fallback Testing**: Real components fail, automatic mock fallback
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5. **Recovery Testing**: Real components recover, automatic switch back
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6. **Network Partition**: Components handle network splits gracefully
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7. **Load Testing**: Performance under realistic traffic patterns
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## Monitoring and Observability
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### Health Checks
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```go
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type HealthStatus struct {
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Component string `json:"component"`
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Backend string `json:"backend"` // "mock", "real", "hybrid"
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Status string `json:"status"` // "healthy", "degraded", "failed"
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LastCheck time.Time `json:"last_check"`
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ErrorCount int `json:"error_count"`
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Latency time.Duration `json:"latency_ms"`
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}
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```
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### Metrics Collection
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```rust
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pub struct HybridMetrics {
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pub mock_requests: u64,
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pub real_requests: u64,
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pub fallback_events: u64,
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pub recovery_events: u64,
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pub avg_latency_mock: Duration,
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pub avg_latency_real: Duration,
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pub error_rate_mock: f64,
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pub error_rate_real: f64,
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}
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```
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### Dashboard Integration
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- Component status visualization
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- Real-time switching events
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- Performance comparisons (mock vs real)
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- Error rate tracking and alerting
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- Capacity planning metrics
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## Deployment Guide
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### 1. Pre-deployment Checklist
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- [ ] Mock components tested and stable
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- [ ] Real implementations ready and tested
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- [ ] Configuration files prepared
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- [ ] Monitoring dashboards configured
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- [ ] Rollback procedures documented
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### 2. Deployment Process
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```bash
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# Phase 2.1: Enable DHT backend only
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kubectl set env deployment/bzzz-coordinator BZZZ_USE_REAL_DHT=true
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kubectl set env deployment/rustle-browser RUSTLE_USE_REAL_CONNECTOR=false
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# Phase 2.2: Enable RUSTLE connector
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kubectl set env deployment/rustle-browser RUSTLE_USE_REAL_CONNECTOR=true
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# Phase 2.3: Enable full hybrid mode
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kubectl apply -f config/phase2-hybrid.yaml
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```
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### 3. Rollback Procedure
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```bash
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# Emergency rollback to full mock mode
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kubectl set env deployment/bzzz-coordinator BZZZ_USE_REAL_DHT=false
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kubectl set env deployment/rustle-browser RUSTLE_USE_REAL_CONNECTOR=false
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```
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## Success Criteria
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### Phase 2 Completion Requirements
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1. **All Phase 1 tests pass** with hybrid components
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2. **Real component integration** working end-to-end
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3. **Automatic fallback** triggered and recovered under failure conditions
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4. **Performance parity** between mock and real implementations
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5. **Zero-downtime switching** between backends validated
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6. **Production monitoring** integrated and alerting functional
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### Performance Benchmarks
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- **DHT Operations**: Real implementation within 2x of mock latency
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- **RUSTLE Queries**: End-to-end response time < 500ms
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- **Fallback Time**: Mock fallback activated within 100ms of failure detection
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- **Recovery Time**: Real backend reactivation within 30s of health restoration
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### Reliability Targets
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- **Uptime**: 99.9% availability during Phase 2
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- **Error Rate**: < 0.1% for hybrid operations
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- **Data Consistency**: Zero data loss during backend switching
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- **Fallback Success**: 100% successful fallback to mock on real component failure
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## Risk Mitigation
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### Identified Risks
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1. **Real component instability**: Mitigated by automatic fallback
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2. **Configuration drift**: Mitigated by infrastructure as code
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3. **Performance degradation**: Mitigated by continuous monitoring
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4. **Data inconsistency**: Mitigated by transactional operations
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5. **Network partitions**: Mitigated by eventual consistency design
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### Contingency Plans
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- **Immediate rollback** to Phase 1 mock-only mode
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- **Component isolation** to contain failures
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- **Manual override** for critical operations
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- **Emergency contact procedures** for escalation
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## Next Steps to Phase 3
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Phase 3 preparation begins once Phase 2 stability is achieved:
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1. **Remove mock components** from production code paths
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2. **Optimize real implementations** for production scale
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3. **Add security layers** (encryption, authentication, authorization)
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4. **Implement advanced features** (sharding, consensus, Byzantine fault tolerance)
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5. **Production hardening** (security audits, penetration testing, compliance)
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