It’s the other way around. The YAML schema supports JSON because YAML was designed as a superset of JSON.
I get where you’re coming from, but JSON Schema still absolutely is the framework that supports YAML files and not the other way around. I’ve been using JSON Schema pretty heavily lately to write schemas using YAML, for validating YAML.
@Lynxtickler ahh, I misunderstood what you were referring to. Didn’t realise you were talking about JSON Schema and not the JSON syntax itself.