[dangets]

It doesn't include validators for TOML and INI, but if you're doing JSON and YAML, I would take a look at using or building upon CUE (https://cuelang.org/). It is a different take on schema definition (plus more), and is surprising terse and powerful model.

[Alifatisk]

Yeah, Cuelang is actually on my list. If I need a config validator and its going to be Cue.