Langgraph

LangGraph raises TypeError on function node output This morning my LangGraph flow crashed after a new tool node. TypeError: cannot unpack non-iterable ToolInvocation object Python 3.12, langgraph 0.3.8, langchain 0.2.1. The node function returned a ToolInvocation instead of (ToolInvocation, kwargs); API changed in 0.3.7. Fix: