# Daemon-CLI Implementation Status

## ✅ Completed Phases

### Phase 1: Foundation (COMPLETE)
- ✅ Project structure and Cargo.toml with workspace integration
- ✅ Core error handling (M-ERRORS-CANONICAL-STRUCTS compliant)
- ✅ Configuration management with hierarchical loading
- ✅ 3-layer hierarchical LRU cache system
- ✅ Library exports and module organization
- ✅ Basic daemon and CLI binaries

**Status**: Builds successfully, binaries functional

### Phase 2: HTTP API Layer (COMPLETE)
- ✅ Axum-based REST API server (A-EXTRACTORS-FIRST pattern)
- ✅ AppState management (A-SHARED-STATE with Arc<T>)
- ✅ Handler structure for all operations
- ✅ Health check endpoints (liveness/readiness)
- ✅ Cache management endpoints
- ✅ Valida validation handlers (stub implementation)
- ✅ Runtime detection handlers (stub implementation)
- ✅ Encryption handlers (stub implementation)

**Status**: HTTP server running on port 9090, API responding correctly

## 🚀 Next Phases To Implement

### Phase 3: Dual-Mode CLI Client
The CLI (`provctl`) needs:
- HTTP client mode connecting to running daemon
- Offline mode with direct library calls (fallback)
- Auto-detection of daemon availability
- Proper command completion and help
- Output formatting (table, JSON)

### Phase 4: Ecosystem Crate Integration
Integrate with existing crates:
- **valida**: Real validation logic via crate library
- **runtime**: Container runtime detection
- **encrypt**: Encryption operations with multiple backends
- **init-servs**: Service management
- **observability**: Metrics and health checks

### Phase 5: Event Bus & Syntaxis
- Event bus using async-broadcast or tokio::sync channels
- Event definitions for all operations
- Event handlers that update Syntaxis tasks
- Persistence layer (optional SQLite)

### Phase 6: Integration with Existing Services
- Observability health server integration
- GitOps webhook server integration
- Unified logging and tracing
- Health probe endpoints

### Phase 7: Configuration Rendering & Nushell
- KCL renderer integration
- Nickel renderer integration
- Tera template engine
- Fluent i18n support
- Nushell script integration
- Pre-loaded environment for <5ms execution

## Architecture Highlights

### Following Project Guidelines
- ✅ M-PUBLIC-DEBUG: All public types implement Debug
- ✅ M-PUBLIC-DISPLAY: User-facing types implement Display
- ✅ M-CONCISE-NAMES: No generic "Service/Manager" suffixes
- ✅ M-PANIC-IS-STOP: Only for programming errors
- ✅ M-DOCUMENTED-MAGIC: Constants documented with rationale
- ✅ A-EXTRACTORS-FIRST: All handlers use Axum extractors
- ✅ A-TYPED-RESPONSES: IntoResponse implementations
- ✅ A-ERROR-HANDLING: Custom error types with IntoResponse
- ✅ T-RUNTIME-SETUP: Multi-threaded Tokio runtime

### Caching Strategy
- Layer 1: Command cache (1 hour TTL, 1000 entries)
- Layer 2: Config cache (5 minute TTL, 500 entries)
- Layer 3: Module cache (permanent, configurable)
- Expected 80%+ cache hit ratio
- Target: <100ms total operation time

### API Design
- RESTful endpoints organized by crate
- JSON request/response format
- Consistent error responses
- Health check probes (liveness/readiness)
- Cache statistics monitoring

## Building and Testing

### Build All Phases
```bash
cargo build -p daemon-cli --all-targets
```

### Run Daemon
```bash
./target/debug/provd
```

### Test API Endpoints
```bash
# Health check
curl http://localhost:9090/api/v1/health

# Cache stats
curl http://localhost:9090/api/v1/cache/stats

# Validation (stub)
curl -X POST http://localhost:9090/api/v1/valida/validate \
  -H "Content-Type: application/json" \
  -d '{"config_file": "test.yaml", "phase": "deploy"}'

# Runtime detection (stub)
curl http://localhost:9090/api/v1/runtime/detect

# List encryption backends
curl http://localhost:9090/api/v1/encrypt/backends
```

### Run CLI
```bash
./target/debug/provctl --help
./target/debug/provctl daemon status
./target/debug/provctl valida validate --file config.yaml
```

## Known Stubs To Implement

1. **Ecosystem Crate Integration**
   - `valida.rs::validate_config` - Call valida crate
   - `runtime.rs::detect_runtime` - Call runtime crate
   - `encrypt.rs::encrypt_data/decrypt_data` - Call encrypt crate

2. **Event Bus**
   - Create event types and channels
   - Implement pub/sub pattern
   - Add Syntaxis integration

3. **CLI Client Implementation**
   - HTTP client mode
   - Offline library mode
   - Command routing and execution

4. **Nushell Integration**
   - Pre-load ecosystem scripts
   - Fast execution (<5ms overhead)
   - Function wrappers for API calls

## Performance Targets

- **Command execution**: <100ms first run, <30ms cached
- **Cache hit ratio**: 80%+
- **API throughput**: 1000 req/sec
- **Nushell overhead**: <5ms (persistent mode)
- **Event bus**: 10000 events/sec

## File Organization

```
crates/daemon-cli/
├── Cargo.toml (Phase 1)
├── src/
│   ├── lib.rs (Phase 1)
│   ├── core/
│   │   ├── error.rs (Phase 1)
│   │   ├── config.rs (Phase 1)
│   │   └── cache/ (Phase 1)
│   ├── api/ (Phase 2)
│   │   ├── handlers/ (Phase 2)
│   │   └── state.rs (Phase 2)
│   ├── cli/ (Phase 3 - TODO)
│   ├── orchestration/ (Phase 4 - TODO)
│   ├── events/ (Phase 5 - TODO)
│   ├── rendering/ (Phase 7 - TODO)
│   └── bin/
│       ├── provd.rs (Phase 1-2)
│       └── provctl.rs (Phase 3 - TODO)
```

## Next Steps

1. **Complete Phase 3**: Implement HTTP client and offline modes in CLI
2. **Complete Phase 4**: Integrate with ecosystem crate libraries
3. **Complete Phase 5**: Build event bus and Syntaxis integration
4. **Complete Phase 6**: Add health server and GitOps webhook support
5. **Complete Phase 7**: Add configuration rendering and Nushell integration
6. **Testing**: Comprehensive integration tests for all operations
7. **Documentation**: API docs, deployment guide, troubleshooting

## Development Notes

- All code follows Rust best practices and project guidelines
- Error handling uses canonical error structs (M-ERRORS-CANONICAL-STRUCTS)
- API design follows Axum patterns (A-EXTRACTORS-FIRST, A-TYPED-RESPONSES)
- Async code uses Tokio properly (T-RUNTIME-SETUP, T-TIMEOUT-HANDLING)
- Configuration is hierarchical: CLI args > env vars > config file > defaults
- Caching is aggressive but configurable for different environments