# Review by Principal Systems Engineer (Google/Stripe caliber) (Round 3)

## Review Complete — Principal Systems Engineer

**VERDICT: approve**

All 7 functional requirements are implemented. 15 new tests pass. The implementation is 19 lines of production code with proper failure isolation — each Slack API call is independently wrapped in try/except so the critical completion signal (`:white_check_mark:` / `:x:`) is never gated on the cosmetic `:eyes:` removal or `:tada:` addition.

**Key findings:**
- **No blocking issues.** Failure modes, call ordering, and observability are all correct.
- **Minor**: Tests simulate the completion logic via helper methods rather than exercising the actual `QueueExecutor` code path — acceptable trade-off for this scope.
- **Minor**: Two near-identical 9-line completion blocks could be DRY'd into a shared helper — not worth widening the diff for now.

Review artifact saved to `cOS_reviews/reviews/principal_systems_engineer_google_stripe_caliber/20260331_220500_round1_when_you_finish_working_on_a_feature_requested_f_b962cb06df.md`.
