What is the benefit of config_schema?

[tjni]

Hi everyone!

My use case is I want to pass a shared httpx.Client into my graph and access it from a node. I understand that this can be done by passing this into the RunnableConfig that my graph is invoked with, and that I can access it also by passing a RunnableConfig to the node that needs it.

I also saw in the documentation that config_schema can be passed into my StateGraph instance. It sounds like a feature that will provide type checking either at runtime or by the type checker (preferred). Can someone help me understand my options here?

Thank you!

Teddy

[NayamAmarshe]

I'm wondering about this too! It apparently does nothing at the moment?

[hinthornw]

UI's. It declares what you can configure.

[NayamAmarshe]

UI's. It declares what you can configure.

Thanks @hinthornw! but is there a way to make config["configurable"] type safe?

config_schema doesn't seem to help with that at the moment and since config's type is always RunnableConfigit gives no type hints for configurable or metadata. So one has to come up with weird ways and workarounds.

Is there a recommended way to do this?