Initial commit

packages/ui/src/components/button.tsx

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+import { cva, type VariantProps } from "class-variance-authority"
+import type { ButtonHTMLAttributes } from "react"
+
+import { cn } from "../lib/utils"
+
+const buttonVariants = cva(
+  "inline-flex items-center justify-center rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-neutral-900 focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 ring-offset-white",
+  {
+    variants: {
+      variant: {
+        default: "bg-neutral-900 text-neutral-50 hover:bg-neutral-800",
+        secondary: "bg-neutral-100 text-neutral-900 hover:bg-neutral-200",
+        ghost: "hover:bg-neutral-100 hover:text-neutral-900",
+      },
+      size: {
+        default: "h-10 px-4 py-2",
+        sm: "h-9 rounded-md px-3",
+        lg: "h-11 rounded-md px-8",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  },
+)
+
+export interface ButtonProps
+  extends ButtonHTMLAttributes<HTMLButtonElement>,
+    VariantProps<typeof buttonVariants> {}
+
+export function Button({ className, size, variant, ...props }: ButtonProps) {
+  return <button className={cn(buttonVariants({ variant, size }), className)} {...props} />
+}

packages/ui/src/index.ts

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+export * from "./components/button"
+export * from "./lib/utils"

packages/ui/src/lib/utils.ts

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+import { type ClassValue, clsx } from "clsx"
+import { twMerge } from "tailwind-merge"
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs))
+}