fix: add stub reminder:

src/agent/create.ts

@@ -173,6 +173,8 @@ export async function createAgent(
     include_base_tools: false,
     include_base_tool_rules: false,
     initial_message_sequence: [],
+    // TODO: enable
+    // parallel_tool_calls: true,
   });
 
   // Apply updateArgs if provided (e.g., reasoningEffort, contextWindow, etc.)