What problem does it solve? Design questions about state models, business logic, or UI layouts are hard to settle on paper. This Skill produces throwaway prototypes that let you press buttons, flip between variants, and feel whether a design actually works before committing to real code. ## Core Features & Use Cases - Logic Prototypes: Generate a single self-contained HTML file with free-play buttons and tabbed guided walkthroughs that drive a pure state machine or reducer through edge cases, shareable with non-developers by double-click. - UI Prototypes: Generate 3-5 structurally different UI variants on one route, switchable via a ?variant= URL param and a floating bottom bar with arrow-key navigation. - Capture Workflow: Fold validated decisions into real code and archive the prototype on a throwaway branch as a primary source. - Use Case: Before building a checkout flow, prototype the state machine as a clickable HTML demo so a PM can discover that "cancel after payment" behaves unexpectedly. ## Quick Start Ask the AI to build a prototype that answers whether your state model handles a specific edge case, or to generate three UI variants of an existing page.