Handoff bundle, Claude Design → Claude Code packagé
Formalized design→dev handoff pattern as structured bundle: (1) Design assets (Figma file URL or Frames export), (2) Spec sheet (DESIGN.md frontmatter + body), (3) Tokens layer (DTCG json + resolvers), (4) Component Manifests (typed for MCP), (5) Validation criteria (a11y targets, browser support, performance budget). The bundle is versioned, dated, signed. Inspired by the Anthropic Claude Design workflow + Figma Make kits.