Ruby: how to use self.included meaningfully

clever_solution.rb

module CreateClassMethodsUponInclude
  def self.included(base)
    # does what we want
  end
end

module MyModule
  include CreateClassMethodsUponInclude

  # ...
end

clever_solution_and_use_case.rb

module CreateClassMethodsUponInclude
  def self.included(base)
    base.define_singleton_method :included do |base|
      base.extend(self)
    end
  end
end

module MyModule
  include CreateClassMethodsUponInclude

  def something
    'something '
  end
end

class MyClass
  include MyModule
end

p MyClass.something + MyClass.new.something + 'awesomeness'

create_class_methods_upon_include.rb

def self.included(base)
  base.extend(self)
end

tweak_base_class_upon_include.rb

def self.included(base)
  def base.class_method
    # ...
  end
end

using_both_include_and_extend.rb

class MyClass
  include SomeLogic
  extend SomeLogic
end