Could it be that you pollute the global namespace ?

If you ask your users to ‘include’ your library this can happen easily!

Calculate footprint

initial = methods.count + Module.constants.count
require 'my_library'
include MyLibrary

puts "Namespace-Footprint"
puts methods.count + Module.constants.count - initial

How to clean up ?

A simple solution is adding a separate Inclusion module, that does not live in your main
namespace and redirect all methods you want to share with the user from your main namespace.

#my_library/inclusion.rb
module MyLibrary
  module Inclusion
    ...
  end
end

#my_library.rb
module MyLibrary
  ..
  Inclusion.public_instance_methods.each do |method|
    define_method method do |*args|
      Inclusion.send(method,*args)
    end
  end
end