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 action buttons and tabbed guided walkthroughs that drive a state machine or reducer through edge cases, shareable with non-developers by double-click. - UI Prototypes: Generate 3-5 radically different UI variants on an existing route, switchable via a ?variant= URL param and a floating bottom bar with arrow-key navigation. - Capture Workflow: Fold validated decisions into real code while preserving the prototype on a throwaway branch as a primary source. - Use Case: A PM is unsure whether an order state machine handles cancellation-after-shipping. Use this Skill to build a clickable HTML demo with scenarios for the happy path, the edge case, and an illegal transition, then hand it to the team for feedback. ## Quick Start Ask the AI to build a prototype that tests whether your state model handles a specific edge case, or to generate three UI variants of an existing page.