Phase 2/3 of product-playbook — the UI enforcement gate. Mechanically checks built UI (and its DESIGN.md) against the /design-system universal laws, with a REAL WCAG contrast engine (OKLCH/hex → ratio) so contrast is computed, never asserted. Use after building or changing UI, before shipping, or in
Phase 2/3 of product-playbook — the UI enforcement gate. Mechanically checks built UI (and its DESIGN.md) against the /design-system universal laws, with a REAL WCAG contrast engine (OKLCH/hex → ratio) so contrast is computed, never asserted. Use after building or changing UI, before shipping, or in CI — run /frontend-audit "check my UI", "is this accessible", "audit the frontend", "did I break th