# Decision Gate: Daily Slack Thread Consolidation

**Branch:** `colonyos/you_are_sending_too_many_slack_messages_to_the_m_1b324759d9`
**PRD:** `cOS_prds/20260401_120332_prd_you_are_a_code_assistant_working_on_behalf_of_the_engineering_team_the_following.md`
**Date:** 2026-04-01

## Persona Verdicts

| Persona | Verdict | Critical | High | Medium | Low |
|---------|---------|----------|------|--------|-----|
| Andrej Karpathy (Round 2) | APPROVE | 0 | 0 | 0 | 3 |
| Linus Torvalds (Round 2) | APPROVE | 0 | 0 | 0 | 1 |
| Principal Systems Engineer (Round 1) | APPROVE | 0 | 0 | 0 | 3 |
| Staff Security Engineer (Round 3) | APPROVE | 0 | 0 | 0 | 2 |

**Tally:** 4/4 APPROVE, 0 CRITICAL, 0 HIGH findings.

---

```
VERDICT: GO
```

### Rationale
All four personas unanimously approve with zero critical or high-severity findings. The implementation correctly addresses all 10 functional requirements from the PRD: daily thread creation/rotation, overnight summary via structured templates (zero LLM cost), critical alert elevation with explicit `critical=True` flags on all 5 callers, restart recovery via DaemonState persistence, backward-compatible `per_item` mode, and proper config validation. The codebase has comprehensive test coverage (491+ tests passing, 55 new tests covering config, state, lifecycle, routing, summary, and integration scenarios). Token handling was improved by consolidating from 2 paths to 1.

### Unresolved Issues
- None blocking merge.

### Recommendation
Merge as-is. The following minor advisory items from reviewers can be addressed in follow-up work:
- Add a brief comment explaining the double `_ensure_daily_thread()` call pattern (idempotent short-circuit)
- Document that `_create_daily_summary` filters by `added_at` date rather than completion date (intentional V1 design choice)
- Consider a follow-up PR to add a mrkdwn sanitization utility for user-controlled fields interpolated into Slack messages (pre-existing pattern across the module, not introduced by this PR)
