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Json is for machines, yaml is for humans, as a general rule. They’re mostly compatible feature-wise.

Yaml is well readable by a human but it's much to tightly defined to be "for humans". It's for machines but readable by humans I'd say. Plus it's got sets and you can embed csv's (just 2 things of the top of my head).

And if I remember correctly, YAML is a superset of JSON.

Obligatory link to the "YAML sucks" repo:

https://github.com/cblp/yaml-sucks

If you ignore the flame-inducing title, it's just a table showing how different implementations parse YAML input in very different ways.

you want to use protobufs