Thanks for writing Getopt::Lucid. It has always been my module of choice for parsing command line options. It is easy to use for simple and complex cases too. I have a few questions.

Counter()

I'm guessing that each occurence of this command line arg increments the counter.

CSV()

Wouldnt this be a neat option to have? You supply a comma-separated series of values and it appears as a list when you access it:

./script.pl --csv_arg=a,b,c 

my @arg = $opt->get_csv_arg;
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It wouldnt have to parse all the CSV syntax, just simple CSV. It is more convenient to specify things that way than repeatedly supplying the argument you want to cobble into a list.