something.rake

namespace :something do
  task execute_patch: :environment do
    # OtherClass is used in MyClass
    OtherClass.class_eval do
      def foo
        'bar'
      end
    end
    
    loop do
      MyClass.execute(...)
    end
    
    OtherClass.class_eval do
      def foo
        'foo'
      end
    end
  end
end