Example showing validation against custom schema

[nabadger]

Describe Request:

The app supports validation against a custom schema file, however I can't seem to get this to work.

For example, if I wanted to validate System defined in my local catalog-info.yaml against https://raw.githubusercontent.com/backstage/backstage/refs/heads/master/packages/catalog-model/src/schema/kinds/System.v1alpha1.schema.json how would I do that?

I'm not even sure I should be using that schema to validate... :)

If I download that schema and run it, I get

Validating Entity Schema policies for file catalog-info.yaml
Validated entity kind 'system' successfully.
Using validation schema from system-schema.json...
Failed to validate catalog-info.yaml: Error: can't resolve reference Entity from id SystemV1alpha1

My end goal would be to define a custom schema with some extra validation that I'd like.

Thanks