I repeatedly see this "yaml isn't typesafe" claim but have no idea where it's coming from since all the Kubernetes APIs are OpenAPI, and thus JSON Schema, and s

I repeatedly see this "yaml isn't typesafe" claim but have no idea where it's coming from since all the Kubernetes APIs are OpenAPI, and thus JSON Schema, and since YAML is a superset of JSON it is necessarily typesafe Every JSON Schema aware tool in the universe will instantly know this PodSpec is wrong: kind: 123 metadata: [ {you: wish} ] I think what is very likely happening is that folks are -- rightfully! -- angry about using a text templating language to try and produce structured files. If they picked jinja2 they'd have the same problem -- it does not consider any textual output as "invalid" so jinja2 thinks this is a-ok jinja2.Template("kind: {{ youbet }}").render(youbet=True) I am aware that helm does *YAML* sanity checking, so one cannot just emit whatever crazypants yaml they wish, but it does not then go one step further to say "uh, your json schema is fubar friend"