# Review by Linus Torvalds (Round 5)

VERDICT: approve

FINDINGS:
- [src/colonyos/orchestrator.py]: `_verify_detected_failures()` implements correct sentinel → regex fallback parsing with fail-open default; 16 unit tests cover the decision boundary
- [src/colonyos/orchestrator.py]: Verify loop control flow is clean — dual budget guards, early break on success, `Phase.FIX` reuse inherits safety-critical status automatically
- [src/colonyos/orchestrator.py]: `Phase.FIX` reuse for verify-fix limits audit granularity (can't distinguish review-fix from verify-fix in logs without checking order) — acceptable for v1
- [src/colonyos/config.py]: `_parse_verify_config()` validates `max_fix_attempts >= 1` and follows existing parser patterns exactly
- [src/colonyos/config.py]: No haiku default for `Phase.VERIFY` despite PRD suggestion — correct design choice for reliability
- [src/colonyos/instructions/verify.md]: Clean separation of concerns — discover, run, emit sentinel; explicitly forbids code modification
- [src/colonyos/instructions/verify_fix.md]: Raw `{test_failure_output}` interpolated without sanitization — accepted risk per existing threat model
- [src/colonyos/orchestrator.py]: Resume chain correctly updated: `learn → verify → deliver` with proper `_SKIP_MAP` entries
- [tests/test_verify_phase.py]: 621 lines of comprehensive tests covering all critical paths including budget exhaustion and resume scenarios

SYNTHESIS:
This is a clean, well-structured implementation that does exactly what it says on the tin. The data structures are right — sentinel-based output parsing with regex fallback, a simple loop with budget guards at both entry points, and config that validates its invariants. No unnecessary abstractions, no clever hacks, no commented-out code. The two-agent separation (read-only verify, write-enabled fix) preserves audit boundaries. The 55 new tests cover all the critical paths including the tricky ones (budget exhaustion mid-loop, resume from failed verify, `0 failed` false-positive avoidance). All 9 PRD requirements implemented, all 55 verify-specific tests pass, zero regressions in the existing 3110 tests. Ship it.
