Use when reviewing how a branch changes the look of a screen, or sweeping one surface with --full, against the DESIGN.md or wiki page that governs it and the shared component packages @shared/ui, @cire/ui and @osn/auth-ui. Lists every element the diff draws by hand and the component that already draws it, checks tokens, shape, colour and contrast, focus, motion, type and copy, layout and the tests that hold a look, measures every contrast or geometry claim, and reports U-C/H/M/L findings in the four-field format.