crd-ref-docs by Elastic: A fresh implementation of this project. Nowadays, I don't have a lot of time to maintain this tool. So consider using one of the above in case this repo does not work for you.

Today, Kubernetes API does not provide OpenAPI specs for CRDs (e.g. Knative), therefore the gen-apidocs generator used by Kubernetes won't work. Even when Kubernetes API starts providing OpenAPI specs ...