# Review by Principal Systems Engineer (Google/Stripe caliber) (Round 1)

The picture is clear. The branch `HEAD` is identical to `main` — **no implementation work has been done**. All 6 parent tasks and all subtasks remain unchecked. Let me write the review.

---

## Review — Principal Systems Engineer

### Assessment

**The branch contains zero implementation changes.** `HEAD` (`c743759`) is identical to `main`. The branch was created but no code was committed. All 10 functional requirements (FR-1 through FR-10) from the PRD are unimplemented. All 6 parent tasks (1.0–6.0) and their ~18 subtasks in the task file remain unchecked.

There is nothing to assess for quality, safety, or convention adherence because there are no diffs to review.

---

VERDICT: request-changes

FINDINGS:
- [src/colonyos/config.py]: FR-1/FR-2 unimplemented — `ParallelImplementConfig.enabled` still defaults to `True`, `DEFAULTS["parallel_implement"]["enabled"]` still `True`
- [src/colonyos/config.py]: FR-8 unimplemented — no log warning when parallel mode is explicitly enabled
- [src/colonyos/orchestrator.py]: FR-3/FR-4/FR-5/FR-7/FR-9 unimplemented — no sequential task runner exists; no topological ordering, per-task commits, budget allocation, or PhaseResult generation
- [src/colonyos/orchestrator.py]: FR-6 unimplemented — no DAG-aware failure handling (BLOCKED status, skip dependents, continue independents)
- [src/colonyos/parallel_orchestrator.py]: FR-10 unverified — parallel opt-in path not validated with new default
- [tests/]: No new or updated tests for any of the 6 parent tasks
- [branch]: Branch HEAD is identical to main (commit c743759) — zero commits of implementation work

SYNTHESIS:
This is a complete non-delivery. The branch was created and the PRD/task artifacts exist, but the implement phase produced no code changes whatsoever. All 10 functional requirements, all 6 parent tasks, and all subtasks are unimplemented. The branch needs to go back to the implement phase from scratch. There are no partial results to salvage — the sequential task runner, config default flip, failure handling, prompt scoping, and test coverage all need to be built. From a systems perspective, the irony is notable: the PRD is about making task implementation sequential to avoid merge conflicts, and the implementation itself appears to have been a no-op, possibly due to the very parallel execution issue it aims to fix.