What problem does it solve? Choosing a UI direction from a single mockup teaches nothing, and comparing variants that differ only in color wastes the review. This Skill builds three genuinely different versions of one UI piece, each taking a distinct position on a chosen design axis, and hosts them behind a picker on the real page so you can flip between them and decide. ## Core Features & Use Cases - Axis-based variant generation: Picks one primary axis (structure, density, emphasis, type, or voice) and gives each of three variants a distinct position on it, so differences are attributable. - URL-driven picker: Hosts variants on the real page with a ?variant= search param, keyboard navigation, and a deliberately neutral floating control specified in picker.md. - Accessibility floor and promotion workflow: Every variant must clear accessibility escalation triggers before entering the picker, and the chosen variant is promoted into production code while the harness is deleted. - Use Case: You are redesigning a metric card on a dashboard. The Skill builds Quiet, Editorial, and Dense versions with realistic data on the actual page, presents a tradeoff table, and lets you pick one to promote. ## Quick Start Ask the assistant to build three variants of the metric card component so you can compare different layout directions and pick one.