What problem does it solve? Design questions about state models, business logic, or UI layouts often stall in abstract discussion. This Skill produces a small, runnable throwaway prototype that gives concrete evidence for whether a logic model behaves correctly or which Qt page layout works best, before any production contract is written. ## Core Features & Use Cases - Logic Prototypes: Drive a state machine, pure transition function, or data model through representative scenarios in C++20 or Python, showing each action and resulting state. - UI Prototypes: Generate up to five structurally different Qt Widgets variants switchable through a temporary QStackedWidget selector, hosted inside an existing page when possible. - Use Case: Before committing to a Backtest condition editor design, spin up three layout variants in one temporary Qt host, compare them side by side, record the accepted variant, then remove the harness and reimplement it properly. ## Quick Start Ask the agent to prototype whether the proposed order state machine handles a cancel-after-partial-fill edge case, or to show three layout variants for a Qt settings page.
