Hmm ... I'm not sure I'd use a Modulino for this.

Something like

perl -mMODULE=foo

will use Module and call Module->import("foo") and you are free to let the importer do whatever you want, and you can have a variety of functions you can call.

see perlrun -[mM][-]module=arg... for details.

Of course calling a Modulino perl path/MODULE.pm foo can also validate the command-line options like foo here, but in this case your client needs to know the path to the installation.