Library for runtime application configuration—interested?

To dive into this deeper, I could avoid it, but that would prohibit me from doing my clever little compile-time guarantees as mentioned in my last post:

Pretty much the only window of time I have to modify how Runtime generates functions in different contexts pre-compilation based on the user’s input is by reading from Application.get_all_env(:runtime), so I’d have to say goodbye to some features without it.

Doing this via config has introduced some major pains in supporting user-defined custom Runtime.Configuration.Type and Runtime.Configuration.Source structs, since they aren’t yet available at Runtime’s compile-time, so abandoning it is not off the table. But I waited until I had a work-around for this and proven the concept before re-soliciting your opinions on the config soultion.