Skill: Migrate / Interop Design System

Bridge to or from external design systems via a role-based crosswalk.

Steps

1. Read design-systems/interop-protocol.md (Crosswalk Method, the three directions, headless-vs-styled guidance, verification).
2. Use the curated tables in design-systems/crosswalk.md for Material 3 / Apple HIG / Fluent 2 / Carbon / shadcn/ui / Radix. For others, derive a mapping with the Crosswalk Method (map by role/intent across 6 axes: color roles, type scale, spacing unit, radius, elevation, motion).
3. Choose the direction:
   • FROM external → our tokens (adopt their look): re-point semantic.*.
   • TO external stack (our components on their foundation): theme their primitives with our tokens.
   • Migrate: Audit → Map → Bridge (alias layer) → Verify, screen by screen.
4. Verify every mapped color pair for contrast (scripts/contrast.py / a11y-audit); confirm all 8 states + dark mode survive the mapping.

Output

A crosswalk table (our token → their token → value note), a bridge plan if migrating, and verified token overrides. Render via design-code.