# Review by Linus Torvalds (Round 3)

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## Review Summary

**377 tests pass, 0 failures.** All 7 functional requirements implemented across 162 lines of production code in 4 files, with 664 lines of tests.

VERDICT: approve

FINDINGS:
- [src/colonyos/daemon.py]: Watchdog thread architecture is correct — reads only GIL-safe primitives, cannot deadlock with `_agent_lock`
- [src/colonyos/daemon.py]: All three pipeline exit paths consistently clear `_pipeline_started_at` and `_current_running_item`
- [src/colonyos/daemon.py]: `_post_slack_message()` lacks explicit socket timeout (non-blocking for v1, SDK has internal timeouts)
- [src/colonyos/daemon.py]: Benign race between watchdog recovery and main thread finally block — both converge on FAILED state, cosmetic only
- [src/colonyos/models.py]: Schema v4→v5 migration is backward-compatible via `None` default on `started_at`
- [src/colonyos/config.py]: Minimum floor clamp with warning is the right pattern for daemon config
- [tests/test_daemon.py]: 664 lines of tests at ~4:1 test-to-production ratio with proper failure isolation

SYNTHESIS:
This is clean, minimal, correct code. 162 lines to add a watchdog thread that detects stuck pipelines and recovers — that's the right size for this feature. The key architectural insight is that the watchdog must be independent of the lock held by the thing it's watching, and the implementation gets this right by reading only GIL-safe primitives and filesystem stats. The dual-gate detection is appropriately conservative. The recovery sequence is a linear cleanup chain where each step is isolated from the others' failures. The test coverage is thorough without being bloated. Ship it.