One-Prompt Startup Teardown and 30-Day Launch Plan

The prompt assigns a dual persona — advisor AND investor — which forces the model to balance constructive guidance with skeptical scrutiny. A pure advisor role tends toward encouragement; adding 'brutally honest investor' counteracts that bias and pushes the model toward surfacing real objections. The enumerated checklist (ICP, problem, alternatives, MVP, pricing, distribution, risks, validation, launch plan) acts as a structured output contract. Without it, the model would produce a generic SWOT-style response. Listing the exact deliverables ensures nothing critical is skipped and makes the output immediately actionable. The closing instruction — 'Be honest enough to save me months' — is a goal-anchoring phrase that recalibrates the model's tone toward bluntness over politeness. It signals that false positivity is the failure mode to avoid, which nudges the model away from sycophantic responses.