# Review by Andrej Karpathy (Round 3)

## Review Complete — Andrej Karpathy (Round 3)

**VERDICT: approve** ✅

All 8 functional requirements are implemented. 318 tests pass with 0 failures. ~45 lines of production code across 4 files.

**Key observations from an AI engineering perspective:**

1. **The triage LLM boundary is untouched** — `is_passive` is pure control-plane metadata that never enters the prompt. The model classifies on content alone, which is exactly right. You don't want the model to know *how* a message arrived, only *what* it says.

2. **Two-phase reaction pattern is correct UX** — Suppressing 👀 on intake and adding it post-triage is the right design for stochastic classification. Users should never see the bot "thinking about" messages it won't act on.

3. **Queue-full suppression prevents creepy UX** — Passive messages silently drop when the queue is full instead of posting a warning to a user who didn't address the bot.

4. **10:1 test-to-code ratio** with proper concurrency testing (threading.Event synchronization, dedup race conditions).

No blocking findings. Review artifact written to `cOS_reviews/reviews/andrej_karpathy/20260401_150000_round3_you_are_a_code_assistant_working_on_behalf_of_the_engineering_team_the_following.md`.