Swagger documentation in separate class

[AdisonCavani]

Currently, you can document endpoint using SwaggerOperation attribute above HandleAsync method:

[SwaggerOperation(
        Summary = "Submit a new article",
        Description = "Enables the submission of new articles",
        OperationId = "B349A6C4-1198-4B53-B9BE-85232E06F16E",
        Tags = new[] {"Article"})
]

Personally, I don't like this approach. Another library (FastEndpoints) has interesting alternative:

public class DeleteCustomerSummary : Summary<DeleteCustomerEndpoint>
{
    public DeleteCustomerSummary()
    {
        Summary = "Deleted a customer the system";
        Description = "Deleted a customer the system";
        Response(204, "The customer was deleted successfully");
        Response(404, "The customer was not found in the system");
    }
}

which produces this Swagger documentation:

IMO this is much cleaner, because I don't make my endpoints clogged up with comments.
Full project with this solution is here.

Is something like this possible with this library?
If not, I'm passing it to you as a feature request.

[ardalis]

I like that, too! I've seen FastEndpoints but didn't notice this. I wonder if they did anything to make it work, or if it's just a Swagger feature we can just use in the same manner?

[AdisonCavani]

I don't think it's a Swagger feature. I've looked at a source code and this is what I found:

Summary contructor
EndpointSummary class