Imagine a design has already launched and failed, then work backward to figure out why. Use this whenever the user asks "what could go wrong," "what are the risks," wants a pre-launch review, asks for a devil's-advocate read, or says "argue against this." Also trigger when the user is confident about a design and you want to surface the failure modes they may not see. Produces a structured artifact listing the most likely failure scenarios ranked by probability and severity, with mitigations.
