# Decision Gate: Refactor `daemon.py` into `daemon/` Package (Recovery v7)

**Branch:** `colonyos/recovery-7cc0851d44`
**PRD:** `cOS_prds/20260402_054259_prd_colonyos_daemon_py_recovery_context_previous_branch_colonyos_colonyos_daemon_py.md`
**Date:** 2026-04-02

## Persona Verdicts

| Persona | Verdict |
|---|---|
| Linus Torvalds | APPROVE |
| Andrej Karpathy | APPROVE |
| Staff Security Engineer | APPROVE |
| Principal Systems Engineer | APPROVE |
| Principal Systems Engineer (Google/Stripe) | APPROVE |

**Tally: 5/5 APPROVE**

## Findings Summary

| Severity | Count | Details |
|---|---|---|
| CRITICAL | 0 | — |
| HIGH | 0 | — |
| MEDIUM | 1 | `_HelpersMixin` adds a 4th submodule beyond PRD's 3 — unanimously accepted as net positive |
| LOW | 1 | `_get_daemon_module()` call sites could use one-line comments (addressed in final commit) |

## FR Compliance

- [x] FR-1: `daemon.py` → `daemon/__init__.py`
- [x] FR-2: `DaemonError`, `_CombinedUI`, `_DaemonMonitorEventUI` → `_ui.py`, re-exported
- [x] FR-3: Watchdog methods → `_WatchdogMixin` in `_watchdog.py`
- [x] FR-4: Recovery methods → `_ResilienceMixin` in `_resilience.py`
- [x] FR-5: `Daemon` inherits from all mixins (MRO clean, no diamond)
- [x] FR-6: `from colonyos.daemon import Daemon, DaemonError` works unchanged
- [x] FR-7: All tests pass without modification (149-152 pass; 3 failures pre-existing on `main`)
- [x] FR-8: No circular imports

## Test Results

- **149-152 tests pass** (count varies by persona run; all agree on the same result)
- **3 failures** in `TestDailyThreadLifecycle` rotation tests — confirmed **pre-existing on `main`**, not regressions
- **Zero modifications** to `tests/test_daemon.py`
- **Zero modifications** to `src/colonyos/cli.py`

---

```
VERDICT: GO
```

### Rationale
All 5 personas unanimously approve. Zero CRITICAL or HIGH findings. All 8 functional requirements from the PRD are met. The implementation is a conservative, operationally invisible structural refactoring — the attack surface, runtime behavior, and test regression oracle are unchanged. The bonus `_HelpersMixin` extraction (beyond PRD scope) further reduces the monolith and was unanimously endorsed by reviewers.

### Unresolved Issues
(none)

### Recommendation
Merge as-is. The 3 `TestDailyThreadLifecycle` rotation test failures are pre-existing on `main` and should be tracked as a separate issue. Future follow-up PRs can extract notification, scheduling, and execution method groups using the same mixin pattern established here.
