What problem does it solve? Teams often build features without validating the underlying need, wasting effort on ideas that lack product-market fit. This Skill forces structured thinking about the "why" before writing code, turning vague ideas into actionable specs. ## Core Features & Use Cases - Product Diagnostic: Runs a YC-office-hours-style questionnaire covering target user, pain quantification, MVP scope, anti-goals, and success metrics, then outputs a PRODUCT-BRIEF.md with a go/no-go recommendation. - Founder Review: Reads your README, CLAUDE.md, package.json, and commit history to score product-market fit signals and identify the one change that would 10x the project. - User Journey Audit: Walks through onboarding as a new user, documents friction points, times each step, and recommends the top three fixes. - Feature Prioritization: Scores candidate features with an ICE framework (impact × confidence ÷ effort) and outputs a ranked roadmap. - Use Case: Before starting a new feature, run the diagnostic mode to produce a PRODUCT-BRIEF.md that your team can review and approve before any code is written. ## Quick Start Ask the assistant to run a product diagnostic on your current project idea and generate a PRODUCT-BRIEF.md with a go/no-go recommendation.