# Review by Principal Systems Engineer (Google/Stripe caliber) (Round 5)

All 241 tests pass. Now let me write the review.

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## Review Complete — Principal Systems Engineer, Round 5

VERDICT: approve

FINDINGS:
- [src/colonyos/repo_map.py:get_tracked_files]: Subprocess call is correctly hardened — `capture_output=True`, no `shell=True`, 30s timeout, catches `TimeoutExpired` and `OSError`. Fail-open returns `[]` which cascades to an empty map. This is the right posture: a broken `git ls-files` should never block a pipeline run.
- [src/colonyos/repo_map.py:truncate_to_budget]: Calls `format_tree([fs])` per file inside the greedy loop — O(n) string allocations where n ≤ 2000. Measured: full test suite completes in 2.5s including 95 repo map tests. Acceptable for V1; if profiling shows this matters, batch formatting is a straightforward optimization.
- [src/colonyos/repo_map.py:SENSITIVE_PATTERNS]: `.env`, `.env.*`, `.env*` — the last subsumes the first two. Harmless redundancy, not a correctness issue. Missing `*.p12`, `*.pfx`, `id_rsa*` — low severity since these are rarely git-tracked and the map exposes names not contents.
- [src/colonyos/repo_map.py:extract_file_symbols]: Sequential extraction loop. For 2000 files with `ast.parse()` and regex, latency is 1-3s. Acceptable V1 performance; `ThreadPoolExecutor` parallelization is a clean future optimization if needed.
- [src/colonyos/orchestrator.py:_run_pipeline]: Single `generate_repo_map()` call at the top, result passed to all 8 phases. Correct — no per-phase regeneration, no stale-cache concern within a single run. The `try/except Exception` wrapper means a repo map failure logs a warning and the pipeline continues with empty context. Exactly the right blast radius.
- [src/colonyos/orchestrator.py:_inject_repo_map]: Injection ordering is correct across all phases — repo map goes in *before* `_inject_memory_block()`, establishing spatial orientation before semantic context. Matches the PRD's prompt layering spec.
- [src/colonyos/orchestrator.py:run_ceo]: CEO generates its own independent map since it runs outside `_run_pipeline`. Correct — CEO doesn't have access to the pipeline's prompt text, so it gets an unranked map. This is fine; the CEO reviews proposals, not code.
- [src/colonyos/config.py:_parse_repo_map_config]: Input validation rejects `max_tokens < 1` and `max_files < 1` with clear error messages. Follows the exact same pattern as `_parse_memory_config`. `save_config` only serializes non-default values — clean.
- [src/colonyos/cli.py:map]: Uses `dataclasses.replace()` for `--max-tokens` override — idiomatic, no mutation of the original config. `--prompt` flag is a good debugging affordance for testing relevance ranking.
- [tests/test_repo_map.py]: 95 tests using real `git init` repos in tmp directories, not mocks. This is the right testing strategy for a module that shells out to `git ls-files`. Coverage includes: file walking, sensitive pattern filtering, include/exclude patterns, Python AST extraction, JS/TS regex extraction, tree formatting, relevance ranking, token budget truncation, and the full `generate_repo_map` pipeline.
- [src/colonyos/repo_map.py:rank_by_relevance]: Scoring is deterministic — keyword overlap with tiered weights (path=10, symbol=5, exact_path=1000, basename=500). No stochastic behavior, no embeddings, fully debuggable. The `words >= 3 chars` filter matches the existing convention in `memory.py`.

SYNTHESIS:
This is a well-executed V1 that makes the right tradeoff at every decision point. The architecture is simple and correct: `git ls-files` → `ast.parse()`/regex → keyword ranking → greedy truncation. No new dependencies, no persistent caching to invalidate, no complex concurrent data structures. The fail-closed pattern in the orchestrator (try/except → warn and continue) means a repo map bug can never block a production pipeline — exactly the 3am-debugging property I look for. The injection ordering (repo map → memory → learnings) is consistent across all 8 phases plus CEO. Test coverage is thorough with 95 tests using real git repos. The three non-blocking observations from prior rounds (missing niche sensitive patterns, greedy truncation slack, sequential extraction) are all correct V1 tradeoffs that can be addressed if profiling or user feedback warrants it. Ship it.