feat: introduce Radix UI design system skill with a component template and examples.

skills/radix-ui-design-system/templates/component-template.tsx

@@ -0,0 +1,148 @@
+/**
+ * Radix UI Component Template
+ * 
+ * This template provides a starting point for creating
+ * custom components with Radix UI primitives.
+ * 
+ * Replace [PRIMITIVE] with actual primitive name:
+ * Dialog, DropdownMenu, Select, Tabs, Tooltip, etc.
+ */
+
+import * as [PRIMITIVE] from '@radix-ui/react-[primitive]';
+import { cva, type VariantProps } from 'class-variance-authority';
+import { cn } from '@/lib/utils';
+
+// ============================================================================
+// Variants Definition (using CVA)
+// ============================================================================
+
+const [component]Variants = cva(
+  // Base styles (always applied)
+  "base-styles-here",
+  {
+    variants: {
+      // Define your variants
+      variant: {
+        default: "default-styles",
+        secondary: "secondary-styles",
+        destructive: "destructive-styles",
+      },
+      size: {
+        sm: "small-size-styles",
+        md: "medium-size-styles",
+        lg: "large-size-styles",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "md",
+    },
+  }
+);
+
+// ============================================================================
+// TypeScript Interfaces
+// ============================================================================
+
+interface [Component]Props 
+  extends React.ComponentPropsWithoutRef<typeof [PRIMITIVE].Root>,
+          VariantProps<typeof [component]Variants> {
+  // Add custom props here
+}
+
+// ============================================================================
+// Component Implementation
+// ============================================================================
+
+export function [Component]({
+  variant,
+  size,
+  className,
+  children,
+  ...props
+}: [Component]Props) {
+  return (
+    <[PRIMITIVE].Root {...props}>
+      {/* Trigger */}
+      <[PRIMITIVE].Trigger asChild>
+        <button className={cn([component]Variants({ variant, size }), className)}>
+          {children}
+        </button>
+      </[PRIMITIVE].Trigger>
+
+      {/* Portal (if needed) */}
+      <[PRIMITIVE].Portal>
+        {/* Overlay (for Dialog, etc.) */}
+        <[PRIMITIVE].Overlay className="overlay-styles" />
+        
+        {/* Content */}
+        <[PRIMITIVE].Content className="content-styles">
+          {/* Required accessibility parts */}
+          <[PRIMITIVE].Title className="title-styles">
+            Title
+          </[PRIMITIVE].Title>
+          
+          <[PRIMITIVE].Description className="description-styles">
+            Description
+          </[PRIMITIVE].Description>
+
+          {/* Your content */}
+          <div className="content-body">
+            {/* ... */}
+          </div>
+
+          {/* Close button */}
+          <[PRIMITIVE].Close asChild>
+            <button className="close-button">Close</button>
+          </[PRIMITIVE].Close>
+        </[PRIMITIVE].Content>
+      </[PRIMITIVE].Portal>
+    </[PRIMITIVE].Root>
+  );
+}
+
+// ============================================================================
+// Sub-components (if needed)
+// ============================================================================
+
+[Component].[SubComponent] = function [SubComponent]({
+  className,
+  ...props
+}: React.ComponentPropsWithoutRef<typeof [PRIMITIVE].[SubComponent]>) {
+  return (
+    <[PRIMITIVE].[SubComponent]
+      className={cn("subcomponent-styles", className)}
+      {...props}
+    />
+  );
+};
+
+// ============================================================================
+// Usage Example
+// ============================================================================
+
+/*
+import { [Component] } from './[component]';
+
+function App() {
+  return (
+    <[Component] variant="default" size="md">
+      Trigger Content
+    </[Component]
+  );
+}
+*/
+
+// ============================================================================
+// Accessibility Checklist
+// ============================================================================
+
+/*
+[ ] Keyboard navigation works (Tab, Arrow keys, Enter, Esc)
+[ ] Focus visible on all interactive elements
+[ ] Screen reader announces all states
+[ ] ARIA attributes are correct
+[ ] Color contrast meets WCAG AA (4.5:1 for text)
+[ ] Focus trapped when needed (modals)
+[ ] Focus restored after close
+*/