implement-with-senior-dev

No direct evidence of overt malware in the fragment (no network/exfiltration, no suspicious payload execution, no hardcoded secrets). The primary security concern is a high-impact filesystem safety risk: plan-derived CH-n `path` values are used directly to construct source/destination paths for `shutil.copyfile` into baseline_dir without explicit normalization/boundary enforcement. This could enable directory traversal and unintended file copying if upstream validation does not constrain CH-n paths. Subprocess usage is limited to git with fixed arguments, reducing command-injection likelihood, but still expands operational risk. Overall: likely a tooling component, but should be hardened around path validation before trusting plan input.