Addresses whole-branch review's minor findings: - Unknown CLI arguments now echo only the flag name, not its value, so a mistyped flag (e.g. --pasword=secret) can't leak a credential into the error output. - README now notes that failed runs retain a screenshot/trace under test-results/ (gitignored, may contain the username but not the masked password), and points at the UNVERIFIED post-composer selectors as the first thing to check during real home-network verification. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>