This skill should be used when the user says "pre-mortem", "premortem", "risk analysis", "stress premortem", "failure analysis", "what could go wrong", "pre mortem", "investigate failure", "failure modes", or wants to stress-test a product concept by applying Gary Klein's pre-mortem methodology to identify hypothetical failure root causes, early warning signals, and mitigation strategies. Produces a pre-mortem report with 3 root causes across distinct failure dimensions and recommended concept updates.