Use to establish or audit a product's brand so the factory's output looks intentional, not template — when a ticket asks to "create a brand", "define the design system / visual identity / palette / typography", or when delivered UI looks generic and needs a deliberate direction. Detects existing brand and extends it in its own idiom, or commits to one specific direction (palette, type pairing, voice) and writes a BRAND.md. Invoke whenever the factory needs a design foundation before building UI.
