Debug and Fix Find the root cause of a failure, then — when the user chooses to — fix it with test-first discipline. Done when: the causal chain from trigger to symptom is stated with no gaps and file:line evidence, and either a verified fix has been handed off (PR, commit, or the user's chosen stop) or a diagnosis-only summary has been delivered. Escalate rather than persist: 2-3 hypotheses exhausted without confirmation, or 3 failed fix attempts, means diagnose why instead of trying again — that is the smart escalation describes. One hypothesis, one change at a time; changing several to see…