# Review by Andrej Karpathy (Round 3)

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## Review Complete — Andrej Karpathy (Round 3)

**VERDICT: approve**

### Summary

All 10 functional requirements are implemented, all 6 tasks are complete, 76 tests pass, and the security fixes from round 2 are all properly addressed. The implementation is ready to ship.

### Key Observations

1. **Security fixes are solid.** The CRITICAL `git add -A` issue is replaced with selective staging through `_is_secret_like_path()`. All subprocess calls have timeouts. Commit messages are sanitized. Per-task audit logging is in place.

2. **Prompt design is the strongest part.** Single-task scoping with `"Implement ONLY task X"` + `"Do not implement other tasks"` is exactly how you program an LLM — explicit, redundant constraints at the boundaries. The "Previously Completed Tasks" context block gives just enough for the model to build on prior work without replaying everything.

3. **Architecture matches the failure mode.** Sequential-by-default eliminates merge conflicts at the source rather than trying to resolve them. This is the right call for an autonomous system.

### Remaining Non-Blocking Items for Follow-Up

| Finding | File | Severity |
|---------|------|----------|
| `_inject_memory_block()` not called in sequential path — intra-run memory store context missing | `orchestrator.py` | Low |
| `_drain_injected_context()` not wired in sequential path | `orchestrator.py` | Low |
| "Previously Completed Tasks" grows linearly — cap at last N for large task chains | `orchestrator.py` | Low |

The review artifact has been saved to `cOS_reviews/reviews/andrej_karpathy/`.
