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fix(langchain_v1): tool selector should use last human message #33294

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Merged
merged 1 commit into from
Oct 6, 2025
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fix(langchain_v1): tool selector should use last human message #33294

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2 changes: 1 addition & 1 deletion libs/langchain_v1/langchain/agents/middleware/tool_selection.py
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Original file line number Diff line number Diff line change
Expand Up @@ -181,7 +181,7 @@ def _prepare_selection_request(self, request: ModelRequest) -> _SelectionRequest

# Get the last user message from the conversation history
last_user_message: HumanMessage
for message in request.messages:
for message in reversed(request.messages):
if isinstance(message, HumanMessage):
last_user_message = message
break
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