cetskelgen help should have one or two complete command line examples
I received feedback of a user scared by the help page.
It is custom to have an "EXAMPLES" section at the end. Something like:
cetskelmod producer myreco::MyProducer creates a skeleton in MyProducer_module.cc with the art producer myreco::MyProducer in it, in the current directory and using the default options. cetskelmod -e beginJob -e endJob --dir myservice service myserv::MyService creates a skeleton in myservice/MyService_service.cc with the class myserv::MyService in it. This class already contains placeholders for the standard beginJob() and endJob() methods (see --entry option above).
--output-diroption should specify that the destination directory is required to already exist.
(incidentally, I get quite a number of confusing warnings when using it in OSX (perl 5.18.2))