Devil's Advocate: Ruthless Idea Critique

Before you commit to any idea, plan, or decision — ask Claude to argue against it as hard as it possibly can.
Not politely. Not with caveats. With the strongest possible case for why you are completely wrong.
The holes it finds are the ones that would have killed you later anyway.
"You are a brilliant ruthless critic. Your only job is to destroy this idea. Not politely. Not constructively. Find every crack. Attack it across 4 dimensions: 1. FLAWED ASSUMPTIONS — What am I taking for granted that might be wrong? 2. EXECUTION RISKS — Where is this most likely to break in practice? 3. MARKET REALITY — What am I ignoring about how people actually behave? 4. THE FATAL FLAW — The one thing that could kill this entirely. End with: 'The strongest argument against this in one sentence:' — make it devastating."