write_todos() — langchain Function Reference

Architecture documentation for the write_todos() function in todo.py from the langchain codebase.

Function python LangChainCore Runnables called by 1

Entity Profile

LangChainCore→ Runnables→ write_todos() — langchain Function Reference

Dependency Diagram

graph TD
  4db9c954_6050_9e2c_53b5_4429e85045e4["write_todos()"]
  446b9f1c_796b_e509_22cc_36bc6d734792["todo.py"]
  4db9c954_6050_9e2c_53b5_4429e85045e4 -->|defined in| 446b9f1c_796b_e509_22cc_36bc6d734792
  d98ccf82_4d6c_11e1_1817_de4c6a3ada8b["__init__()"]
  d98ccf82_4d6c_11e1_1817_de4c6a3ada8b -->|calls| 4db9c954_6050_9e2c_53b5_4429e85045e4
  style 4db9c954_6050_9e2c_53b5_4429e85045e4 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain_v1/langchain/agents/middleware/todo.py lines 126–135

def write_todos(
    todos: list[Todo], tool_call_id: Annotated[str, InjectedToolCallId]
) -> Command[Any]:
    """Create and manage a structured task list for your current work session."""
    return Command(
        update={
            "todos": todos,
            "messages": [ToolMessage(f"Updated todo list to {todos}", tool_call_id=tool_call_id)],
        }
    )