Domain Context This skill implements a proven product management framework. The approach combines best practices from industry leaders and is designed for practical application in day-to-day PM work. Input Requirements - Context about your product, feature, or problem - Relevant data, research, or constraints (recommended but optional) - Clear articulation of what you're trying to achieve Hierarchy of Marketplaces What It Is The Hierarchy of Marketplaces is a framework for building defensible marketplace businesses. The core insight: GMV is a vanity metric. Happy GMV is what matters. Most mar…