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fix: outermost workflow shouldn't be using managed values #216

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Merged
merged 3 commits into from
Jul 23, 2025
Merged

fix: outermost workflow shouldn't be using managed values #216

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265212e
outer state with simple messages, no managed values
sydney-runkle Jul 23, 2025
7eadc20
rename
sydney-runkle Jul 23, 2025
e1e4d8d
use any message
sydney-runkle Jul 23, 2025
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21 changes: 15 additions & 6 deletions langgraph_supervisor/supervisor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,11 @@
from uuid import UUID, uuid5

from langchain_core.language_models import BaseChatModel, LanguageModelLike
from langchain_core.messages import AnyMessage
from langchain_core.runnables import RunnableConfig
from langchain_core.tools import BaseTool
from langgraph.graph import END, START, StateGraph
from langgraph.graph.message import add_messages
from langgraph.prebuilt import ToolNode
from langgraph.prebuilt.chat_agent_executor import (
AgentState,
Expand All @@ -20,6 +22,7 @@
from langgraph.pregel.remote import RemoteGraph
from langgraph.utils.config import patch_configurable
from langgraph.utils.runnable import RunnableCallable, RunnableLike
from typing_extensions import Annotated, TypedDict

from langgraph_supervisor.agent_name import AgentNameMode, with_agent_name
from langgraph_supervisor.handoff import (
Expand Down Expand Up @@ -192,6 +195,12 @@ def _prepare_tool_node(
return tool_node


class _OuterState(TypedDict):
"""The state of the supervisor workflow."""

messages: Annotated[Sequence[AnyMessage], add_messages]


def create_supervisor(
agents: list[Pregel],
*,
Expand Down Expand Up @@ -362,10 +371,10 @@ def web_search(query: str) -> str:
if add_handoff_back_messages is None:
add_handoff_back_messages = add_handoff_messages

if state_schema is None:
state_schema = (
AgentStateWithStructuredResponse if response_format is not None else AgentState
)
supervisor_schema = state_schema or (
AgentStateWithStructuredResponse if response_format is not None else AgentState
)
workflow_schema = state_schema or _OuterState

agent_names = set()
for agent in agents:
Expand Down Expand Up @@ -406,13 +415,13 @@ def web_search(query: str) -> str:
model=model,
tools=tool_node,
prompt=prompt,
state_schema=state_schema,
state_schema=supervisor_schema,
response_format=response_format,
pre_model_hook=pre_model_hook,
post_model_hook=post_model_hook,
)

builder = StateGraph(state_schema, config_schema=config_schema)
builder = StateGraph(workflow_schema, config_schema=config_schema)
builder.add_node(supervisor_agent, destinations=tuple(agent_names) + (END,))
builder.add_edge(START, supervisor_agent.name)
for agent in agents:
Expand Down