Establishes a brand's visual direction and compresses it into a Creative Direction Brief with a paste-ready 'style block' that every downstream image prompt reuses, so all generated assets look like they came from one brand. Use when the user says 'define my brand style', 'I want a consistent look', 'what should my visuals look like', 'help me pick an aesthetic / mood / color palette', 'my generated images all look different', or before any multi-asset creative work where no style guide exists yet. Produces the Creative Direction Brief: aesthetic profile, palette with hex codes, style block for prompts, and prohibitions.