Why Typed Dict for LangGraph State

[BowerJames]

Just curious, does anyone know the reasoning for using a Typed Dict for the LangGraph State as opposed to something like a Pydantic BaseModel?

[hinthornw]

One reason is that types in python's stdlib are less likely to see breaking changes.

Example: Pydantic moved from v1 to v2 last summer but a large portion of our user base still uses v1, and there are some rough edges in supporting both