# Review by Andrej Karpathy (Round 1)

## Checklist

### Completeness
- [x] All functional requirements from the PRD are implemented (FR-1 through FR-13)
- [x] All tasks in the task file are marked complete (6 task groups, all checked)
- [x] No placeholder or TODO code remains

### Quality
- [x] All tests pass (245 passed in 0.55s)
- [x] No linter errors introduced
- [x] Code follows existing project conventions
- [x] No unnecessary dependencies added
- [x] No unrelated changes included (CI/CD and CHANGELOG changes are from prior commits on the branch, not this feature)

### Safety
- [x] No secrets or credentials in committed code
- [x] No destructive database operations without safeguards
- [x] Error handling is present for failure cases (path traversal validation with double guard)

## Detailed Findings

### naming.py — Clean, Deterministic Design
The `ReviewArtifactPath` frozen dataclass and the five factory functions are well-structured. Each function accepts an optional `timestamp` parameter, making them deterministic in tests while defaulting to `generate_timestamp()` in production. The `persona_slug` is sanitized through `slugify()`, which prevents malformed directory names from user-provided persona roles. This is the right pattern — treat naming as a pure function from inputs to paths.

### orchestrator.py — Path Traversal Guard is Solid
The double path-traversal check (once on subdirectory, once on the resolved final path including filename) is defense-in-depth done right. The `ValueError` with a clear message is appropriate. The `mkdir(parents=True, exist_ok=True)` call after validation ensures the directory tree is created atomically.

### Instruction Templates — Correct but Could Be More Explicit
The templates correctly point agents to `{reviews_dir}/reviews/` and `{reviews_dir}/decisions/`. The `learn.md` template instructs recursive reading. However, the decision templates say "each persona has its own subfolder" without specifying the glob pattern `{reviews_dir}/reviews/**/*.md`. An LLM agent will likely figure this out, but being explicit about the glob pattern would reduce ambiguity — this is a prompt engineering concern. Minor.

### Test Coverage — Thorough
- `test_naming.py`: 93 new lines covering all 5 factory functions, frozen immutability, slug sanitization, auto-timestamp, and relative_path composition.
- `test_orchestrator.py`: Path traversal rejection tested for both subdirectory and filename vectors. Subdirectory creation tested. Root fallback tested.
- `test_init.py`: Verifies `.gitkeep` creation in both subdirectories.
- `test_standalone_review.py`: Updated glob patterns from `*.md` to `**/*.md` to match new nesting.

### Minor Observation — task_review_artifact_path Unused in orchestrator.py
`task_review_artifact_path` is defined in `naming.py` and tested, but is not imported or called from `orchestrator.py`. The PRD mentions it as FR-5/FR-9 for "legacy pipeline task-level reviews." This appears to be forward-looking infrastructure — the function exists and is tested, but the orchestrator code path that would use it hasn't been wired up yet. This is acceptable since the PRD frames it as legacy, but worth noting.

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VERDICT: approve

FINDINGS:
- [src/colonyos/instructions/decision.md]: Instruction tells agents about persona subfolders but doesn't provide a glob pattern — minor prompt clarity improvement possible
- [src/colonyos/instructions/decision_standalone.md]: Same as above
- [src/colonyos/orchestrator.py]: `task_review_artifact_path` not imported or used; FR-9 factory exists but is unwired in the orchestrator
- [src/colonyos/naming.py]: Clean implementation; all 5 factory functions deterministic and well-tested
- [src/colonyos/orchestrator.py]: Double path-traversal guard is good defense-in-depth

SYNTHESIS:
This is a well-executed structural refactor. The implementation treats the naming problem correctly — as a pure function from semantic inputs (feature name, persona, round number) to filesystem paths. The `ReviewArtifactPath` dataclass is frozen and composable, the factory functions are deterministic in tests via timestamp injection, and the orchestrator callsites have been systematically updated. The path-traversal guard addresses a real attack surface (agent-generated persona slugs could theoretically contain `../`). The instruction template updates are functional, though from a prompt engineering perspective I'd prefer explicit glob patterns over natural language descriptions of directory structure — LLMs are more reliable with concrete paths than inferred navigation. The one gap is `task_review_artifact_path` being defined but unused in the orchestrator, which means FR-5/FR-9 is partially implemented (naming exists, wiring doesn't). Overall this is clean, tested, and ships the right abstractions. Approve.
