From 39891526cacd4e251345a42bfec9a7afcb3fb953 Mon Sep 17 00:00:00 2001
From: William Fu-Hinthorn <13333726+hinthornw@users.noreply.github.com>
Date: Mon, 31 Mar 2025 06:31:50 -0700
Subject: [PATCH] Handle edge case

---
 libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py b/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
index 0ca0d42b1..136fb5ae7 100644
--- a/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
+++ b/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
@@ -772,6 +772,8 @@ def create_react_agent(
     # Define the function that determines whether to continue or not
     def should_continue(state: StateSchema) -> Union[str, list]:
         messages = _get_state_value(state, "messages")
+        if not messages:
+            return END
         last_message = messages[-1]
         # If there is no function call, then we finish
         if not isinstance(last_message, AIMessage) or not last_message.tool_calls: