Practical walkthrough of Stitch MCP + Claude Code with two authentication paths: (1) Stitch API key via HTTP header to stitch.googleapis.com/mcp — no gcloud required; (2) Google Cloud OAuth for token refresh on heavy usage.
Once connected, Claude Code calls MCP tools to read component structure, color tokens, and typography from Stitch designs and generates matching code. design.md exports package design tokens for session consistency.