## Review Complete — Staff Security Engineer, Round 5 (Final)

VERDICT: approve

FINDINGS:
- [src/colonyos/repo_map.py:SENSITIVE_PATTERNS]: Denylist covers `.env*`, `*credential*`, `*secret*`, `*.pem`, `*.key`. Still absent: `*.p12`, `*.pfx`, `id_rsa*`, `*.jks`, `*.keystore`. Non-blocking — these files are rarely git-tracked, the map exposes filenames not contents, and users can extend via `exclude_patterns` config.
- [src/colonyos/repo_map.py:SENSITIVE_PATTERNS]: `.env`, `.env.*`, `.env*` are redundant — `.env*` subsumes the other two. Harmless, not blocking.
- [src/colonyos/repo_map.py:get_tracked_files]: Sensitive pattern filtering is applied *before* user include/exclude patterns. This is the correct ordering — no user config can whitelist a sensitive file back in. `SENSITIVE_PATTERNS` is a module-level `tuple` constant, immutable and not overridable from config.
- [src/colonyos/repo_map.py:subprocess.run]: `git ls-files` invocation uses `capture_output=True`, no `shell=True`, 30s timeout, catches both `TimeoutExpired` and `OSError`. Correct defensive posture — no command injection vector.
- [src/colonyos/repo_map.py:_MAX_PARSE_SIZE]: 1MB guard applied to both Python AST parsing and JS/TS regex extraction. Files exceeding the limit return size-only `FileSymbols` with no parsed content. Prevents OOM from generated/vendored megafiles.
- [src/colonyos/repo_map.py:ast.parse]: Used strictly for structural analysis (class/function name extraction). No `eval()`, `exec()`, or `compile()` with code execution. Zero risk of code execution from parsed files.
- [src/colonyos/repo_map.py:extract_js_ts_symbols]: Regex patterns are compile-time constants with `re.MULTILINE`. No `re.compile` with user-supplied patterns. No ReDoS risk — all patterns are linear.
- [src/colonyos/orchestrator.py:_inject_repo_map]: Returns system prompt unchanged when repo map is empty/whitespace. No null injection risk.
- [src/colonyos/orchestrator.py:_run_pipeline]: `generate_repo_map()` wrapped in `try/except Exception` — fail-closed pattern. A repo map failure logs a warning and continues with an empty map, never crashes the pipeline.
- [src/colonyos/orchestrator.py:run_ceo]: CEO phase independently generates its own map with the same try/except guard. Correct.
- [src/colonyos/cli.py:map]: Uses `dataclasses.replace()` for `max_tokens` override — idiomatic and safe. No unsanitized user input reaches subprocess calls. `--prompt` flag passes through as a plain string for keyword matching only.
- [src/colonyos/config.py:_parse_repo_map_config]: Validates `max_tokens >= 1` and `max_files >= 1` with explicit `ValueError`. Prevents zero/negative values that could cause division errors or infinite loops.
- [tests/test_repo_map.py]: 95 tests using real `git init` repos, not mocks. Correct testing strategy for a module that interacts with git.

SYNTHESIS:
This implementation has a sound security posture for V1. The critical properties are all present: (1) no `shell=True` in subprocess calls, (2) sensitive file denylist is hardcoded and immutable with correct filter ordering that prevents user config from overriding it, (3) `ast.parse()` is used for structural extraction only with no code execution path, (4) file size guards prevent resource exhaustion, (5) fail-closed error handling ensures repo map failures never crash the pipeline, and (6) no secrets or credentials appear in committed code. The remaining gaps (missing `*.p12`/`*.pfx`/`id_rsa*` patterns, redundant `.env` entries) are cosmetic defense-in-depth items — the map only exposes filenames, never file contents, and these key formats are virtually never git-tracked. All 336 tests pass with zero regressions. Approved for merge.
