From 728db10b1f38c9c56f097d2847f0330977d5eba2 Mon Sep 17 00:00:00 2001
From: Mason Daugherty <mason@langchain.dev>
Date: Fri, 9 Jan 2026 21:25:20 -0500
Subject: [PATCH] fix: suppress unintended deprecation warning (#6669)

1. Any import `from langgraph.prebuilt import X` (even `ToolNode`,
`ToolRuntime`, etc.)
2. -> Loads `langgraph/prebuilt/__init__.py`
3. -> Line 3 imports `create_react_agent` from `chat_agent_executor.py`
4. -> `chat_agent_executor.py` loads completely
5. -> Line 111 evaluates: `StateSchema = TypeVar("StateSchema",
bound=AgentState | AgentStatePydantic)`
6. -> Accessing `AgentStatePydantic` triggers its `@deprecated`
decorator -> warning
---
 libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py b/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
index 42352fefb..4076cfa4b 100644
--- a/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
+++ b/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
@@ -108,8 +108,13 @@ with warnings.catch_warnings():
         structured_response: StructuredResponse
 
 
-StateSchema = TypeVar("StateSchema", bound=AgentState | AgentStatePydantic)
-StateSchemaType = type[StateSchema]
+with warnings.catch_warnings():
+    warnings.filterwarnings(
+        "ignore",
+        category=LangGraphDeprecatedSinceV10,
+    )
+    StateSchema = TypeVar("StateSchema", bound=AgentState | AgentStatePydantic)
+    StateSchemaType = type[StateSchema]
 
 PROMPT_RUNNABLE_NAME = "Prompt"