If I have the openapi spec for an API, should it be fairly straight forward to generate a schema.json from it?

We have an open issue to explore this further and share back any reusable patterns: https://gitlab.com/meltano/sdk/-/issues/310 @edgar_ramirez_mondragon has some sample code there which much be reusable for your use case.

Neat! ( I was more just curious about even manually doing so )