provisioning-platform/prov-ecosystem/crates/daemon-cli/IMPLEMENTATION_STATUS.md

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)
• ✅ 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

cargo build -p daemon-cli --all-targets

Run Daemon

./target/debug/provd

Test API Endpoints

# 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

./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