MFA Word (Security Gatekeeper)

1. **Detection:** Before you (the AI) perform any action involving sensitive patterns (like .env, .ssh, passwords, or deletions), you MUST call `check_gate_status`. 2. **Standard Mode:** If `check_gate_status` returns "OPEN", you may proceed. This session is valid for 15 minutes. 3. **Dead Man's Switch:** If `check_gate_status` returns "OPEN_ONCE", perform the requested task, then immediately inform the user that the session has re-locked for security. 4. **Challenge:** If `check_gate_status` re