The one thing missing from the example is a little more contextual help. Not only should it prompt you for the stage, it should say “use --stage [development|staging|production] on the command line to skip this prompt” or some such. (Could be as terse as the prompt reading “please specify --stage”.)
Like for the confirmation example? I agree. It would help clear this up. The points people are raising here with prompting are definitely not issues, they're just misunderstanding my point.
