Warm Instrument design system

genie's locked visual language is Warm Instrument: warm bone paper, near-black ink, hairline structure, and a restrained clay accent.

The identity rule is simple: clay appears only on generation and refine moments. Structural navigation, panels, save actions, and ordinary primary buttons stay ink or neutral. Embedded cards use system fonts under the strict MCP-App CSP; standalone surfaces may use the brand type stack.

The implementation tokens live in docs/designs/design-6/tokens.css. Current SVG references in that directory document the front door, UI-kit browser, refine surface, embedded modes, primitives, foundations, and genie card.