feat(site): guided path to test your own agent (preview only)

app/lab/test-agent/page.tsx

@@ -0,0 +1,27 @@
+import type { Metadata } from 'next';
+import { notFound } from 'next/navigation';
+import { TestAgentFlow } from '@/components/test-agent-flow';
+
+/**
+ * PREVIEW ONLY, like /lab/talk. The guided path for testing your own agent: a 404 on production, not linked, not
+ * indexed. It goes live only when the owner has tried it and the release it describes is published.
+ */
+export const metadata: Metadata = {
+  title: 'Preview: test your own agent',
+  robots: { index: false, follow: false },
+};
+
+export default function LabTestAgentPage() {
+  if (process.env.VERCEL_ENV === 'production') notFound();
+  return (
+    <main className="min-h-screen bg-slate-950 px-4 py-10 text-white sm:px-6">
+      <div className="mx-auto max-w-2xl space-y-6">
+        <p className="rounded-lg border border-amber-500/40 px-4 py-3 text-sm text-amber-300" data-testid="lab-banner">
+          Preview. This page is not live on trustshell.dev.
+        </p>
+        <h1 className="text-3xl font-bold tracking-tight text-white">Test your own agent</h1>
+        <TestAgentFlow />
+      </div>
+    </main>
+  );
+}