class Thor::Runner

def installed
  thor_root_glob.each do |f|
    next if f =~ /thor\.yml$/
    load_thorfile f unless Thor.subclass_files.keys.include?(File.expand_path(f))
  end
  klasses = Thor.subclasses
  klasses -= [Thor, Thor::Runner] unless options['internal']
  display_klasses(true, klasses)
end