# Review by Principal Systems Engineer (Google/Stripe caliber) (Round 2)

## Review Complete — Principal Systems Engineer

**VERDICT: approve**

### Summary

This is a clean, minimal, well-tested implementation of task-level retry. All 6 functional requirements from the PRD are implemented, all 218 tests pass (22 new + 196 existing), and the code follows existing project conventions faithfully.

### What's Good

- **Plain for-loop retry** — no state machine, no unnecessary abstraction. The simplest thing that works.
- **Bounded blast radius** — same `per_task_budget` per attempt, git cleanup scoped with 30s timeout, no cross-task state leakage.
- **Correct test strategy** — mocks `run_phase_sync`, tests deterministic logic. This is exactly what the two prior failed attempts got wrong.
- **Defensive error handling** — `_clean_working_tree()` catches OSError/TimeoutExpired and logs warnings without raising. Safety-net fallback uses `setdefault()` to avoid overwriting.
- **Existing tests updated correctly** — `max_task_retries=0` preserves "fail immediately" semantics.

### Non-blocking Observations

1. `_drain_injected_context()` inside retry loop — destructive providers lose context on retry
2. Recovery event logs `success: False` for the *trigger*, not the retry *outcome* — naming ambiguity
3. No `task_retry` event when retry succeeds — minor gap in audit trail
4. No upper bound on `max_task_retries` — consistent with existing patterns, worth a ceiling later

The review has been written to `cOS_reviews/reviews/principal_systems_engineer/20260402_022155_round1_you_are_a_code_assistant_working_on_behalf_of_the_engineering_team_the_following.md`.
