What problem does it solve? Teams and founders often jump straight into building before validating whether an idea is worth pursuing, leading to wasted effort on products nobody needs. This Skill enforces a structured discovery process that diagnoses demand, challenges premises, and produces a design document instead of code. ## Core Features & Use Cases - Dual-mode diagnostic: Runs a rigorous Startup mode with six forcing questions about demand evidence, status quo, and target users, or a collaborative Builder mode for hackathons, learning, and side projects. - Premise challenge and alternatives: Forces explicit agreement on premises and generates 2-3 implementation approaches with effort, risk, and reuse analysis before recommending one. - Design doc output: Saves an approved design document to memory with problem statement, demand evidence, recommended approach, and one concrete next action. - Use Case: A founder says "I want to build an AI tool for developers." The Skill asks one question at a time, pushes past vague answers, challenges the premise, presents alternative approaches, and delivers a design doc with a concrete validation assignment. ## Quick Start Ask the agent to run office hours on your new product idea before writing any code.