diff --git a/examples/demo-app/src/lib/auth.ts b/examples/demo-app/src/lib/auth.ts
new file mode 100644
index 0000000..216abdd
--- /dev/null
+++ b/examples/demo-app/src/lib/auth.ts
@@ -0,0 +1,13 @@
+import { db, User } from './db';
+
+/**
+ * AI modified getUser to add OAuth provider mapping
+ */
+export async function getUser(userId: string): Promise<User | null> {
+  const user = await db.user.findUnique({ where: { id: userId } });
+  return user;
+}
+
+export async function verifySession(token: string): Promise<boolean> {
+  return Boolean(token && token.length > 10);
+}