# Review by Linus Torvalds (Round 2)

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## Review Complete — Linus Torvalds

**VERDICT: approve** ✅

### Summary

This is a clean, well-scoped plumbing change. The data structures are right: three fields on `DaemonState`, three fields on `SlackConfig`, one `critical` bool on `_post_slack_message`. The core routing logic is four lines of trivial conditional — if not critical, if daily mode, if thread exists, then thread it. That's the entire feature.

### Key findings:

1. **All 10 functional requirements implemented** — daily mode, per-item backward compatibility, config validation, state persistence, restart recovery, critical alert routing, structured summaries.

2. **`_post_circuit_breaker_cooldown_notice` marked `critical=True`** — minor spec deviation from FR-6 (which only lists 3 critical paths), but defensively correct. Better to surface than bury.

3. **`_ensure_daily_thread()` double-called safely** — from both `_tick()` and `_ensure_notification_thread()`. The second call short-circuits because the first already set today's date. Correct, could use a comment.

4. **`format_daily_summary` is properly pure** — zero LLM calls, deterministic template output, clean label fallback chain.

5. **78 new tests, 2971 total, 0 failures** — lifecycle, routing, summary generation, integration, backward compatibility all covered.

No over-engineering, no unnecessary abstractions, no regressions. Ship it.

The review artifact has been written to `cOS_reviews/reviews/linus_torvalds/20260401_round1_you_are_sending_too_many_slack_messages_to_the_m_1b324759d9.md`.
