```ruby
require 'thor/shell'

module Acclimate
  module Output

    def self.included( base )
      base.send( :include, Thor::Shell )
    end

    def write( msg, color=:white )
      $stdout.write( Rainbow( msg ).color( color ))
    end

    def say( msg, color=:white )
      $stdout.puts( Rainbow( msg ).color( color ))
    end

    def say_stderr( msg, color=:white )
      $stdout.puts( Rainbow( msg ).color( color ))
    end

    def header( msg )
      say msg, :cyan
    end

    def say_ok
      say 'OK', :green
    end

    def say_error
      say_stderr 'ERROR', :red
    end

    def say_skipping
      say 'SKIPPING', :yellow
    end

    def confirm( msg, color=:white, &block )
      write "#{msg}... ", color
      block.call
      say_ok
    rescue ConfirmationError => e
      say_error
      say_stderr( e.message, :red )
      e.finish
      raise Acclimate::Error.new( nil, handled: true, exit_code: e.exit_code )
    rescue
      say_error
      raise
    end
  end
end
```

Fix NameError caused by not providing namesspace (due to Autolaoded).
user
```ruby
require 'thor/shell'

module Acclimate
  module Output

    def self.included( base )
      base.send( :include, Thor::Shell )
    end

    def write( msg, color=:white )
      $stdout.write( Rainbow( msg ).color( color ))
    end

    def say( msg, color=:white )
      $stdout.puts( Rainbow( msg ).color( color ))
    end

    def say_stderr( msg, color=:white )
      $stdout.puts( Rainbow( msg ).color( color ))
    end

    def header( msg )
      say msg, :cyan
    end

    def say_ok
      say 'OK', :green
    end

    def say_error
      say_stderr 'ERROR', :red
    end

    def say_skipping
      say 'SKIPPING', :yellow
    end

    def confirm( msg, color=:white, &block )
      write "#{msg}... ", color
      block.call
      say_ok
    rescue Acclimate::ConfirmationError => e
      say_error
      say_stderr( e.message, :red )
      e.finish
      raise Acclimate::Error.new( nil, handled: true, exit_code: e.exit_code )
    rescue
      say_error
      raise
    end
  end
end
```
assistant