What problem does it solve? Design questions about business logic, state machines, or UI layouts are hard to answer on paper. This Skill produces disposable, runnable prototypes that let you press buttons, flip between variants, and discover flaws in an idea before writing real code. ## Core Features & Use Cases - Logic Prototypes: Build a lightweight interactive terminal app around a pure reducer, state machine, or function set to push edge cases through a state model by hand. - 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 cycling. - Disciplined Cleanup: Enforces throwaway rules — in-memory state, no tests, one-command run, and capturing the answer in a NOTES.md or commit before deletion. - Use Case: Before committing to a dashboard redesign, generate three radically different layouts on the existing /dashboard route, flip through them in the browser, then fold the winner into the real page and delete the rest. ## Quick Start Ask the assistant to prototype the state machine or page layout you are unsure about, stating the specific question the prototype should answer.