Teaches agents how to use the erikt/ui CSS design system, which native HTML elements and minimal class names already come styled (buttons, forms, dialogs, menus, cards, tabs, tooltips, toasts, and more) so no custom CSS or component library is needed. Use this whenever writing, reviewing, or fixing HTML/CSS in a project that depends on erikt/ui or @erikt/ui — signals include a <link>/@import referencing erikt/ui or esm.sh/@erikt/ui, an @erikt/ui entry in package.json, or --ui-* CSS custom properties. Also use whenever asked to add or style any UI component, even if erikt/ui isn't named explicitly.
2026-07-13