InjectedConfig like InjectedState

[tjni]

Checked

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Feature request

When writing a tool that can be used inside LCEL / LangGraph and outside, we can use InjectedState to deliver it through LangGraph state only when inside LangGraph. An analogous use case that I'm missing is something like InjectedConfig("key") to deliver a RunnableConfig of {"configurable": {"key": ...}} to a tool in a strongly typed way.

Motivation

I would like to write strongly typed tool that can be invoked as ordinary functions, or used to generate bindings for service calls, but which also can be used simply from inside a LangGraph graph.

Proposal (If applicable)

No response