# Review by Andrej Karpathy (Round 3)

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VERDICT: approve

FINDINGS:
- [src/colonyos/orchestrator.py]: All 10 PRD functional requirements implemented correctly. `_preflight_check` is properly procedural — no LLM calls wasted on deterministic git state assessment. Fail-closed behavior on ambiguous git status is the right default for a pipeline with `bypassPermissions`.
- [src/colonyos/models.py]: `PreflightError` as `ClickException` subclass enables clean type-based dispatch in auto mode without catching unrelated exceptions. `PreflightResult` dataclass is well-structured with proper serialization round-trip.
- [src/colonyos/cli.py]: `_ensure_on_main` correctly uses `--ff-only` (no auto-rebase). Auto mode catches `PreflightError` specifically and marks iteration as failed rather than halting the loop.
- [src/colonyos/github.py]: `check_open_pr` gracefully degrades on all error paths (timeout, FileNotFoundError, bad JSON, non-zero exit). Returns `(None, None)` — never blocks the pipeline on network failures.
- [src/colonyos/orchestrator.py]: HEAD SHA tracking in `_save_run_log` updates to post-phase SHA so resume validation checks against latest known-good state. Subtle and correct.
- [tests/test_preflight.py]: 607 lines of comprehensive tests covering all state combinations. Mock strategy (cmd-dispatching side_effect functions) is appropriate for deterministic subprocess wrappers.
- [cOS_tasks/]: Task 7.3 (manual happy-path test) remains unchecked — process gap, not a code issue.

SYNTHESIS:
This is a clean, well-scoped implementation that correctly treats git state assessment as a deterministic program rather than an LLM inference problem. The key architectural decision — procedural logic with `PreflightResult` for auditability instead of a full agent phase — avoids burning compute on a closed-form answer while still maintaining the audit trail. The fail-closed defaults are appropriate given the pipeline's elevated permissions. Error messages are actionable and point users to the right fix (`--resume`, `--force`, `git stash`). The `PreflightError` type hierarchy enables the auto loop to distinguish preflight failures from other phase failures, which is essential for the "mark failed and continue" behavior. All 319 tests pass with no regressions. The implementation is ready to ship.