troubleshooting-rca Activation gate (anti-noise) Activate when: - There is an error message, failing test, crash, regression, unexpected behavior, or logs. Skip when: - User requests implementation from scratch and no failure exists yet. Procedure 1. Restate symptom + expected behavior. 2. Collect minimal repro: - Command, input, environment, last known good commit. 3. Hypotheses (max 3) ranked by likelihood. 4. Test each hypothesis with the smallest possible check. 5. Before Fix: Root cause must be clearly stated; one minimal verification step must be given. Then: Fix + verify with test/run.…