Converts app ideas into shippable MVPs by providing structured product planning, technical guidance, and decision-making support focused on rapid validation. Use when the user shares an app idea, needs help scoping an MVP, wants to generate PRDs or starter prompts for Claude Code, needs product decisions during a build, or when they need to be kept focused on shipping rather than over-engineering. Also use for questions about tech stack choices (Next.js/Supabase/Vercel), feature prioritization, or avoiding common early-stage mistakes.