# Review by Linus Torvalds (Round 4)

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## Review Complete — Linus Torvalds

**Branch:** `colonyos/recovery-7cc0851d44`

VERDICT: **approve** ✅

FINDINGS:
- **[src/colonyos/daemon/__init__.py]**: Clean MRO — `Daemon(_WatchdogMixin, _ResilienceMixin, _HelpersMixin)` with no diamond inheritance, no `__init__` overrides in mixins, no `super()` chains. This is the obvious thing to do, which is why it works.
- **[src/colonyos/daemon/_ui.py]**: Pure extraction of `DaemonError`, `_CombinedUI`, `_DaemonMonitorEventUI` — zero `self.*` Daemon coupling. These classes were already standalone; moving them is a copy-paste with no semantic change. Correct.
- **[src/colonyos/daemon/_watchdog.py]**: The `_get_daemon_module()` lazy import is the one clever bit, and it's documented well enough that I don't hate it. Three-line function that ensures `patch("colonyos.daemon.X")` substitutions land at runtime. Good.
- **[src/colonyos/daemon/_resilience.py]**: All seven recovery methods moved intact. `subprocess.run` uses list args, no `shell=True`. Lazy imports kept inside method bodies — same pattern as the original monolith.
- **[src/colonyos/daemon/_helpers.py]**: Beyond PRD scope (4 submodules vs. specified 3), but follows the identical mixin pattern. Acceptable scope creep — the methods are genuinely helper-shaped.
- **[tests/test_daemon.py]**: Zero modifications. 152 passed, 3 failed — the 3 `TestDailyThreadLifecycle` rotation failures are pre-existing on `main` (verified independently).

SYNTHESIS:
After six failed attempts that each tried to be too clever — extracting methods into standalone functions, breaking mock targets, introducing circular imports — attempt seven did the boring, correct thing: mixins. The data structures didn't change. The methods didn't change. The test file didn't change. The import surface didn't change. What changed is that 687 lines moved from one file into four files, each with a clear responsibility boundary. This is a textbook example of "do the simple thing first." Ship it.

Review artifact written to `cOS_reviews/reviews/linus_torvalds/20260402_review_daemon_package_refactor_v7.md`.
