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fix the invalid paraments error in last_message model with return direct type tools #165

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fix the invalid paraments error in last_message model with return direct type tools #165

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6 changes: 5 additions & 1 deletion langgraph_supervisor/supervisor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
from langchain_core.language_models import BaseChatModel, LanguageModelLike
from langchain_core.runnables import RunnableConfig
from langchain_core.tools import BaseTool
from langchain_core.messages import ToolMessage
from langgraph.graph import END, START, StateGraph
from langgraph.prebuilt import ToolNode
from langgraph.prebuilt.chat_agent_executor import (
Expand Down Expand Up @@ -68,7 +69,10 @@ def _process_output(output: dict) -> dict:
if output_mode == "full_history":
pass
elif output_mode == "last_message":
messages = messages[-1:]
if isinstance(messages[-1], ToolMessage):
messages = messages[-2:]
else:
messages = messages[-1:]

else:
raise ValueError(
Expand Down