diff --git a/app/src/adapter/tanstack-start/tanstack-start.adapter.ts b/app/src/adapter/tanstack-start/tanstack-start.adapter.ts
index f9a419c..55151fe 100644
--- a/app/src/adapter/tanstack-start/tanstack-start.adapter.ts
+++ b/app/src/adapter/tanstack-start/tanstack-start.adapter.ts
@@ -5,15 +5,25 @@ export type TanstackStartEnv = NodeJS.ProcessEnv;
 export type TanstackStartConfig<Env = TanstackStartEnv> =
   FrameworkBkndConfig<Env>;
 
+/**
+ * Get bknd app instance
+ * @param config - bknd configuration
+ * @param args - environment variables
+ */
 export async function getApp<Env = TanstackStartEnv>(
-  config: TanstackStartConfig<Env>,
+  config: TanstackStartConfig<Env> = {},
   args: Env = process.env as Env,
 ) {
   return await createFrameworkApp(config, args);
 }
 
+/**
+ * Create request handler for src/routes/api.$.ts
+ * @param config - bknd configuration
+ * @param args - environment variables
+ */
 export function serve<Env = TanstackStartEnv>(
-  { ...config }: TanstackStartConfig<Env> = {},
+  config: TanstackStartConfig<Env> = {},
   args: Env = process.env as Env,
 ) {
   return async (request: Request) => {