Not the user you were asking, but the way we do it is that the OpenAPI/Swagger spec is auto-generated from server-side code (a C# .NET app with the ABP framewor

Not the user you were asking, but the way we do it is that the OpenAPI/Swagger spec is auto-generated from server-side code (a C# .NET app with the ABP framework) during the CI build, and that is then used to auto-generate an API client (via swagger-typescript-api) which is what the frontend app uses. When the backend team makes some changes, they notify the front-end team which then runs the auto-generation script, fixes the typescript errors (if there were breaking changes), and that's it. Pretty nice setup, IMO.