Namespace stuff in your app/ folder

forms.rb

# config/initializers/forms.rb
Rails.application.config.to_prepare do
  path = Rails.root + "app/forms"
  ActiveSupport::Dependencies.autoload_paths -= [path.to_s]
  reloader = ActiveSupport::FileUpdateChecker.new [], path.to_s => [:rb] do
    ActiveSupport::DescendantsTracker.clear
    ActiveSupport::Dependencies.clear
    Dir[path + "**/*.rb"].each do |file|
      ActiveSupport.require_or_load file
    end
  end
  Rails.application.reloaders << reloader
  ActionDispatch::Reloader.to_prepare { reloader.execute_if_updated }
  reloader.execute
end