Audit a Penpot design against WCAG 2.1/2.2 AA (optionally AAA) and produce a structured severity report: color contrast, touch/target sizes, text alternatives, heading hierarchy, and keyboard/focus order. Proposes fixes — does not auto-apply. Also serves as the Evaluator in the brief-to-screen and brief-to-deck loops (scope:deck = slide contrast rules). Triggers: 'check accessibility', 'accessibility audit', 'WCAG check', 'contrast audit', 'a11y review', 'check color contrast', 'is this accessible'.
