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I agree that YAML has its issues. But saying it's bad because it has too many features seems misguided. Do those advanced features get in the way of using a simple YAML file? At least not in my experience.

That being said TOML would be my choice.

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Yes, the features in YAML absolutely get in the way. The "Norway problem" for example ("no" translates to "False" in versions prior to YAML 1.2), but that is just the one more people ran into. Here is a nice overview of some of the problems:

https://ruudvanasseldonk.com/2023/01/11/the-yaml-document-fr...

I would argue that most, if not all, of those problems stem from too many features.

Could go the other way and only have strings a la CONL[0]. Which feels reasonable once I got over my initial shock. Your program is already going to enforce data types, why force that into the config language?

[0] https://cirw.in/blog/conl

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