test.rb

# bin/test.rb
opts.on('--new:thing [NAME]', 'create a new thing') do |name|
 if name.nil?
    puts "you need to name your thing"
    exit 0
  end
  options[:name] = name
  puts "#{name}"
  Test::CLI::New::Thing.new
end

# lib/test/cli.rb
module Test
  module CLI
    module New
      class Thing
        def initialize(name)
          @name = name
          
          puts "it's a thing: #{name}'"
        end
      end
    end
  end
end