Guides and reviews the visual design and brand identity of UI components for web and React Native — color systems, typography pairing, visual hierarchy, signature details, and named style directions (minimal, swiss, editorial, brutalist, neo-brutalist, glass, soft-UI, terminal, playful, retro). Owns the generative, brand-aware side; defers WCAG contrast math, size minimums, and dark-mode mechanics back to /ux. Modes: `guide` (default — build a component from scratch), `review` (audit existing visuals against direction), `direction` (propose a style direction for a new product or feature). Triggers on "visual design", "make this look good", "brand identity", "style direction", "improve the visuals", "review the look", "does this look generic", "/visual-design".