# Review by Andrej Karpathy (Round 1)

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## Review Summary

**374 tests pass.** All 7 functional requirements implemented across 5 commits, +373 / -1 lines.

The implementation is minimal and correct: 19 lines of production code in `cli.py`, 18 lines for the new `remove_reaction()` helper in `slack.py`, and 168 lines of tests. Every new Slack API call follows the existing try/except + `logger.debug()` pattern exactly. The call ordering is correct — `:eyes:` removal executes first, then status emoji, then `:tada:` (success only). Each step is in its own try/except so failures are isolated.

Two non-blocking observations: (1) tests simulate the completion logic rather than exercising the actual `QueueExecutor` — pragmatic given the nested class complexity, (2) the two test classes are near-identical and could be parametrized, but the duplication is acceptable as documentation.

VERDICT: **approve**

FINDINGS:
- [tests/test_cli.py]: Test classes simulate the completion logic rather than exercising the actual QueueExecutor code path — pragmatic given nested class complexity but worth noting
- [tests/test_cli.py]: TestMainCompletionReactions and TestFixCompletionReactions are ~95% identical; could be parametrized but duplication is acceptable as documentation

SYNTHESIS:
This is a textbook small feature implementation. The change is 19 lines of production code that follows existing patterns exactly, wrapped in 168 lines of tests that cover the real failure modes. No new abstractions, no new dependencies, no cleverness. The `remove_reaction()` helper is a pure pass-through that lets callers own error handling — the right design for a function that wraps a single API call. The try/except blocks in cli.py are independent of each other, which means `:eyes:` removal failure can never block the completion signal. All 374 tests pass. Ship it.

Review artifact saved to `cOS_reviews/reviews/andrej_karpathy/20260331_210000_round1_when_you_finish_working_on_a_feature_requested_f_b962cb06df.md`.