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

## Review Complete

Here's my assessment as **Principal Systems Engineer (Google/Stripe caliber)**:

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VERDICT: **approve**

FINDINGS:
- **[src/colonyos/orchestrator.py]**: Timestamps generated independently per persona in a round — cosmetic divergence from PRD examples showing identical timestamps, but functionally correct for uniqueness/ordering. LOW severity.
- **[src/colonyos/orchestrator.py]**: `task_review_artifact_path()` is implemented and tested but has no call site in the orchestrator — either forward-looking dead code or a legacy path that no longer exists. LOW severity.
- **[src/colonyos/naming.py]**: Two bonus factory functions (`standalone_decision_artifact_path`, `summary_artifact_path`) beyond PRD scope — correct engineering decision covering actual call sites that the PRD under-specified.

SYNTHESIS:
This is a clean, well-scoped structural refactoring. All 13 PRD functional requirements are implemented. The `naming.py` centralization is properly designed with frozen dataclasses, injectable timestamps for testability, and slug sanitization on persona names. The path traversal guard in `_save_review_artifact()` uses `resolve()` + `is_relative_to()` — the right approach that handles symlinks. Directory creation uses `mkdir(parents=True, exist_ok=True)` which is race-condition-free. All 6 instruction templates are updated to reference the nested structure, which is critical for agent discoverability. 244 tests pass with thorough coverage of edge cases. The forward-only migration strategy is the right call — no migration utility avoids a class of bugs for ~45 historical files. The two LOW-severity findings don't warrant blocking.