We started just writing configs in typescript which has the benefit of static checking in your editor with suggestions/underlines. Could likely do the same in rust.

I'm afraid by typescript "typesystem" even more so than rust borrows/lifetime. It's so versatile and stringy .. that said it's still good to have some.

What I'm proposing is rather than have Rust validate yaml/toml files, just write the actual config itself in Rust so that your editor can verify/show issues before running. Unless you require ability to edit configs without recompile.