Marble

Use when writing, editing, or creating components, pages, routes, forms, tables, modals, queries, hooks, loaders, or actions in packages/app-builder or packages/ui-design-system. Covers React patterns, TanStack Query/Form, Radix UI, virtual tables, MenuCommand, Tailwind color tokens, file organization, and TypeScript standards. Basic conventions (imports, styling, i18n, resource route middleware) are in .claude/rules/ — this skill provides the deep reference patterns and code examples.