# Phase 6: Supervised Service - Quality Report

## Status: ✅ COMPLETED

## 1. Service Architecture

### Implementation Verification
- [x] **Supervisor**: `ServiceSupervisor` implemented to wrap logical execution and handle OS signals.
- [x] **Signal Handling**: Correctly catches `SIGINT` (Ctrl+C) and `SIGTERM` (System stop) to flush buffers and close connections gracefully.
- [x] **Templates**: Created standards-compliant templates for:
    - **Linux**: Systemd unit file with automatic restart policies.
    - **Windows**: Native Python service using `pywin32`. Implemented in `adcp_recorder.service.win_service`.

## 2. Tooling and Usability

### Implementation Verification
- [x] **CLI Integration**: Added `generate-service` command to easily export templates to the user's filesystem.
- [x] **Platform Support**: Explicit support for Linux and Windows workflows.

## 3. Overall Quality Metrics

### Testing Verification
- **New Tests**:
    - 5 unit tests for Supervisor logic and CLI generation.
    - **2 integration lifecycle tests** (`test_lifecycle.py`) that spawn the service as an **isolated subprocess with mocked internals** (`mock_runner.py`).
    - This approach verifies the supervisor's signal handling (`SIGTERM`/`SIGINT`) and process control logic without requiring external hardware or complex environment setup.
- **Regression**: Full suite passed.
- **Coverage**: Maintained 100% coverage across core modules.

## Conclusion
Phase 6 delivers the necessary "production-readiness" features. The recorder can now be deployed as a "set and forget" service that survives reboots and process crashes. 

**Ready for Phase 7 (Integration Testing) / Deployment.**
