diff --git a/backend/check-deps.ts b/backend/check-deps.ts
new file mode 100644
index 0000000..5d94ea8
--- /dev/null
+++ b/backend/check-deps.ts
@@ -0,0 +1,8 @@
+import 'reflect-metadata';
+import { AuthController } from './src/auth/auth.controller';
+import { AuthService } from './src/auth/auth.service';
+
+const p = Reflect.getMetadata('design:paramtypes', AuthController);
+console.log('AuthController constructor metadata:', p?.map((t: any) => t?.name || String(t)));
+const q = Reflect.getMetadata('design:paramtypes', AuthService);
+console.log('AuthService constructor metadata:', q?.map((t: any) => t?.name || String(t)));