Accessibility Audit
Check a UI against WCAG basics that automated tools miss -- keyboard navigation, focus order, and whether screen-reader text actually makes sense, not just whether alt attributes exist.
CSS Consistency Checker
Catch new styling that drifts from the design system's actual tokens -- hardcoded colors/spacing that should reference an existing variable -- and responsive gaps a desktop-only check misses.
Design System Consistency Checker
Check a new component against the design system's actual existing components before it's built from scratch -- most 'new' UI needs are a variant of something that already exists.
Internationalization Checker
Find hardcoded user-facing strings, string concatenation that breaks in other languages, and formatting that assumes one locale's conventions.
React Component Auditor
Check a component for the specific bugs React's model makes possible -- stale closures, missing dependency array entries, and unnecessary re-renders -- not general style.