From e365b2b8bd695e03d758b19ff109152b2e342a87 Mon Sep 17 00:00:00 2001
From: Sydney Runkle <54324534+sydney-runkle@users.noreply.github.com>
Date: Wed, 6 Aug 2025 17:08:42 -0400
Subject: [PATCH] fix(prebuilt): raise on additional deprecated kwargs (#5848)

---
 libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py | 5 +++++
 libs/prebuilt/tests/test_deprecation.py                 | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py b/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
index 06383edf6..4235f6b02 100644
--- a/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
+++ b/libs/prebuilt/langgraph/prebuilt/chat_agent_executor.py
@@ -473,6 +473,11 @@ def create_react_agent(
         if context_schema is None:
             context_schema = config_schema
 
+    if len(deprecated_kwargs) > 0:
+        raise TypeError(
+            f"create_react_agent() got unexpected keyword arguments: {deprecated_kwargs}"
+        )
+
     if version not in ("v1", "v2"):
         raise ValueError(
             f"Invalid version {version}. Supported versions are 'v1' and 'v2'."
diff --git a/libs/prebuilt/tests/test_deprecation.py b/libs/prebuilt/tests/test_deprecation.py
index 6ce9dfa16..63e9e9b2e 100644
--- a/libs/prebuilt/tests/test_deprecation.py
+++ b/libs/prebuilt/tests/test_deprecation.py
@@ -31,3 +31,11 @@ def test_config_schema_deprecation() -> None:
         match="`get_config_jsonschema` is deprecated. Use `get_context_jsonschema` instead.",
     ):
         assert agent.get_config_jsonschema() is not None
+
+
+def test_extra_kwargs_deprecation() -> None:
+    with pytest.raises(
+        TypeError,
+        match="create_react_agent\(\) got unexpected keyword arguments: \{'extra': 'extra'\}",
+    ):
+        create_react_agent(FakeToolCallingModel(), [], extra="extra")