diff --git a/devfront/src/components/ui/copy-button.tsx b/devfront/src/components/ui/copy-button.tsx
new file mode 100644
index 00000000..83996231
--- /dev/null
+++ b/devfront/src/components/ui/copy-button.tsx
@@ -0,0 +1,54 @@
+import * as React from "react";
+import { Check, Copy } from "lucide-react";
+import { Button, type ButtonProps } from "./button";
+import { cn } from "../../lib/utils";
+
+interface CopyButtonProps extends ButtonProps {
+  value: string;
+  onCopy?: () => void;
+}
+
+export function CopyButton({
+  value,
+  onCopy,
+  className,
+  variant = "secondary",
+  size = "icon",
+  ...props
+}: CopyButtonProps) {
+  const [hasCopied, setHasCopied] = React.useState(false);
+
+  React.useEffect(() => {
+    if (hasCopied) {
+      const timer = setTimeout(() => setHasCopied(false), 1500);
+      return () => clearTimeout(timer);
+    }
+  }, [hasCopied]);
+
+  const copyToClipboard = async () => {
+    try {
+      await navigator.clipboard.writeText(value);
+      setHasCopied(true);
+      if (onCopy) onCopy();
+    } catch (err) {
+      console.error("Failed to copy text: ", err);
+    }
+  };
+
+  return (
+    <Button
+      size={size}
+      variant={variant}
+      className={cn("relative z-10", className)}
+      onClick={copyToClipboard}
+      {...props}
+    >
+      <span className="sr-only">Copy</span>
+      {hasCopied ? (
+        <Check className="h-4 w-4 text-emerald-500 transition-all scale-110" />
+      ) : (
+        <Copy className="h-4 w-4 transition-all" />
+      )}
+    </Button>
+  );
+}
diff --git a/devfront/src/components/ui/toaster.tsx b/devfront/src/components/ui/toaster.tsx
new file mode 100644
index 00000000..3f951781
--- /dev/null
+++ b/devfront/src/components/ui/toaster.tsx
@@ -0,0 +1,31 @@
+import * as React from "react";
+import { useToastState } from "./use-toast";
+import { CheckCircle2, AlertCircle, Info, X } from "lucide-react";
+import { cn } from "../../lib/utils";
+
+export function Toaster() {
+  const toasts = useToastState();
+
+  if (toasts.length === 0) return null;
+
+  return (
+    <div className="fixed bottom-4 right-4 z-[100] flex flex-col gap-2 w-full max-w-[320px]">
+      {toasts.map((t) => (
+        <div
+          key={t.id}
+          className={cn(
+            "flex items-center gap-3 rounded-lg border p-4 shadow-lg animate-in slide-in-from-right-full duration-300",
+            t.type === "success" && "bg-emerald-50 border-emerald-200 text-emerald-800 dark:bg-emerald-950 dark:border-emerald-800 dark:text-emerald-200",
+            t.type === "error" && "bg-rose-50 border-rose-200 text-rose-800 dark:bg-rose-950 dark:border-rose-800 dark:text-rose-200",
+            t.type === "info" && "bg-blue-50 border-blue-200 text-blue-800 dark:bg-blue-950 dark:border-blue-800 dark:text-blue-200"
+          )}
+        >
+          {t.type === "success" && <CheckCircle2 className="h-5 w-5 shrink-0" />}
+          {t.type === "error" && <AlertCircle className="h-5 w-5 shrink-0" />}
+          {t.type === "info" && <Info className="h-5 w-5 shrink-0" />}
+          <p className="text-sm font-medium leading-none">{t.message}</p>
+        </div>
+      ))}
+    </div>
+  );
+}
diff --git a/devfront/src/components/ui/use-toast.ts b/devfront/src/components/ui/use-toast.ts
new file mode 100644
index 00000000..4c19c204
--- /dev/null
+++ b/devfront/src/components/ui/use-toast.ts
@@ -0,0 +1,42 @@
+import * as React from "react";
+
+type ToastType = "success" | "error" | "info";
+
+interface Toast {
+  id: string;
+  message: string;
+  type: ToastType;
+}
+
+let subscribers: ((toasts: Toast[]) => void)[] = [];
+let toasts: Toast[] = [];
+
+const notify = () => {
+  for (const sub of subscribers) {
+    sub(toasts);
+  }
+};
+
+export const toast = (message: string, type: ToastType = "success") => {
+  const id = Math.random().toString(36).substring(2, 9);
+  toasts = [...toasts, { id, message, type }];
+  notify();
+
+  setTimeout(() => {
+    toasts = toasts.filter((t) => t.id !== id);
+    notify();
+  }, 3000);
+};
+
+export const useToastState = () => {
+  const [state, setState] = React.useState<Toast[]>(toasts);
+
+  React.useEffect(() => {
+    subscribers.push(setState);
+    return () => {
+      subscribers = subscribers.filter((sub) => sub !== setState);
+    };
+  }, []);
+
+  return state;
+};
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