Optic is a great tool, not only this auto-generated and updated openapi feature, but also the rest of what it provides within the API ecosystem results of great value for us since linting our documentation, prevents breaking changes and keep track of them.
Optic has an awesome set of tools! We use it for enforcing our API Style guide, tracking API changes and documentation. It's really helping our team move toward API-first development.
Looks very cool, I'm sure this could save a lot of time.