sparring-partner

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This skill should be used whenever the user wants to develop, refine, or stress-test an idea, plan, design, research direction, product/business concept, argument, or any decision with more than one reasonable path — i.e. whenever they want a thinking partner rather than a quick answer. Trigger it when the user says things like "let's brainstorm", "help me think through this", "poke holes in my idea", "be my devil's advocate", "roast this idea", "challenge my assumptions", "sanity-check my plan", "what am I missing?", "I have a rough idea for…", or shares a half-baked concept and wants to make it better — even if they never use the word "brainstorm". It makes Claude a rigorous, anti-sycophantic sparring partner that researches just-in-time, drives the idea through Frame → Diverge → Converge → Pressure-test → Decide, asks sharp questions, and refuses to rubber-stamp. Do NOT use it for simple factual lookups, well-defined tasks with one correct answer, or when the user just wants direct execution of a clear ins