the project is alive but there periods that my main job is so hard that I've really no time for replying... Please be patient.
Check out latest version and read updated documentation (here @ codeplex, but also @ github -> https://github.com/gsscoder/commandline/wiki).
Anyway I think that the concept of Required collides with the on of
But if you want open a discussion, is better point on a specific example and a clear description of what you want to get.
You can start to some prompt example, like:
$ app --opt-a value1 --opt-b value2