What problem does it solve? Design decisions about state models, business logic, or UI layouts often look fine on paper but break down in practice. This Skill builds quick throwaway prototypes so you can press buttons, flip between variants, and discover flaws before committing to real implementation. ## Core Features & Use Cases - Logic Prototypes: Build a small interactive terminal app with a pure reducer, state machine, or function set behind a thin TUI shell, so you can drive state transitions by hand and spot edge cases. - UI Prototypes: Generate 3-5 radically different UI variants on one route, switchable via a ?variant= URL param and a floating bottom bar with arrow-key cycling. - Answer Capture: Records the validated decision in a commit message, ADR, or NOTES.md, then deletes or absorbs the prototype so nothing rots in the repo. - Use Case: You are unsure whether a state machine handles an edge case where action X precedes Y. The Skill builds a one-command terminal app that renders current state and keyboard shortcuts, letting you push the model through real cases until the flaw surfaces. ## Quick Start Ask the AI to prototype the state machine or page design you are unsure about so you can play with it before writing production code.