Works with SW Notifier(http://saikyoline.jp/air/swn/).

.autotest

require 'socket'
require 'autotest/tmux'

Autotest.add_hook :ran_command do |at, *args|
  next false unless Autotest::Tmux.execute?

  output = at.results.join
  result = Autotest::Tmux.parse_output(output, at.class.name)

  TCPSocket.open('localhost', 12345) do |s|
    prefix = case result[:color]
              when :red;    'R:'
              when :yellow; 'Y:'
              when :green;  'G:'
              else ''
             end
    s.write "#{prefix}#{output}"
  end

  next false
end