# Review by Linus Torvalds (Round 1)

Now I have a complete picture. Here's my review:

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VERDICT: approve

FINDINGS:
- [src/colonyos/naming.py]: Clean, simple dataclass and factory functions. No premature abstraction. Each function does exactly one thing — returns a path. The `ReviewArtifactPath` frozen dataclass is the right data structure: it encodes the two pieces of information (subdirectory + filename) without over-engineering. Good.
- [src/colonyos/orchestrator.py]: The `_save_review_artifact()` modification is minimal and correct. The path-traversal guard using `is_relative_to()` is a one-liner that addresses the security concern without bloat. All 5-6 ad-hoc f-string filename constructions have been replaced with `naming.py` calls — grep confirms zero remaining ad-hoc patterns. The function signature change (`subdirectory: str | None = None`) is backward-compatible.
- [src/colonyos/orchestrator.py]: `task_review_artifact_path` is imported but not used in the orchestrator. The function exists in `naming.py` and is tested, so it's available for future use, but the unused import is a minor wart.
- [tests/test_naming.py]: 96 lines of new tests covering all factory functions, frozen immutability, slug sanitization, auto-timestamp, and relative path composition. Good coverage without being excessive.
- [tests/test_orchestrator.py]: Path traversal rejection test is present. Subdirectory creation test is present. Backward-compatible "no subdirectory" test is present. The existing test modifications (`glob("*.md")` → `glob("**/*.md")`) correctly adapt to the nested structure.
- [tests/test_standalone_review.py]: Test glob patterns updated consistently to find files in subdirectories. The pattern changes are mechanical and correct.
- [src/colonyos/instructions/*.md]: All 6 templates updated. The changes are minimal — point agents at the right subdirectories. The `learn.md` change to "recursively read" is the right call.
- [src/colonyos/init.py]: Subdirectory creation with `.gitkeep` is straightforward. The `for subdir in ("decisions", "reviews")` loop is simple and obvious.

SYNTHESIS:
This is a clean, well-structured change that does exactly what the PRD asks for — no more, no less. The data structures are right: a frozen dataclass with two fields and a computed property. The factory functions are simple, obvious, and testable. The orchestrator changes are mechanical replacements of ad-hoc f-strings with centralized naming calls, which is the entire point. The path-traversal guard is present and tested. All 244 tests pass. The one minor nit is an unused `task_review_artifact_path` import in `orchestrator.py`, but that's a forward-looking import for when task-level reviews get wired up, not dead code. The instruction template changes correctly direct agents to the new structure. No clever tricks, no premature abstractions, no unnecessary dependencies. This is the simple, obvious thing done correctly.