What problem does it solve? Design questions about state models, business logic, or UI layouts are hard to settle on paper. This Skill builds a small throwaway prototype — an interactive terminal app for logic questions or switchable UI variants for visual questions — so you can validate an idea with real interaction before committing to production code. ## Core Features & Use Cases - Logic Prototypes: Builds a lightweight terminal app with a pure reducer, state machine, or function set behind a re-rendering TUI, letting you push a state model through edge cases by hand. - UI Prototypes: Generates 3-5 structurally different variants of a page on an existing route, switchable via a ?variant= URL param and a floating bottom bar with arrow-key navigation. - Capture Workflow: Folds validated decisions into real code and preserves the full prototype on a throwaway branch as a primary source, keeping main clean. - Use Case: You are unsure whether a state machine handles a tricky transition sequence. The Skill builds a one-command terminal app where you press keys to fire actions and watch the full state re-render after each step, exposing the flawed assumption immediately. ## Quick Start Ask the agent to build a throwaway prototype that tests whether your state model handles a specific edge case, or to generate three UI variants of a page switchable via a URL parameter.