library · inferred from evidence
TypedDict
A Python library for defining typed dictionaries with type hints.
- LangGraph InvalidUpdateError: Must write to at least one of [...] (state channel name mismatch)
Check that every key your node returns exactly matches a channel name in your state schema; a typo like returning `message` when the channel is `messages` produces this error. Also make sure `graph.invoke()` is called with the required init