I needed a semi automatic config library that helped me validate models on classes but could be extensible without forking another library (like the interesting msgspec-ext) and mantaining it on the side just to enable that bit of flexibility for my needs.

What I came up with was a way to specify DataSources that can be mixed and matches in whatever order necessary, with niceties like CLI config and generalized API readers.

Comments welcome! (please be gentle though ;) )