Extract a Google-spec DESIGN.md from any public URL using the canonical design-ops static extraction pipeline. Produces DESIGN.md, tokens.json, tokens-extended.json, render-contract.json, preview.html, provenance, quality score, drift report, and downstream sidecars for design generation. Triggers — "extract design from URL", "get DESIGN.md from URL", "design-md URL", "drift check this URL against my DESIGN.md", "rip the design system from a site".
