method_added hook incompatible with delegate private

[crevete]

Steps to reproduce

delegate with option private: true seems not compatible with the method_added hook.

In the following snippet, delegate creates a private method #foo. However the method_added hook is called BEFORE the delegate code changes its visibility to false.

class MyTestClass
  def foo = "foo"
end

class MyClass
  attr_reader :my_test_class

  def initialize(my_test_class)
    @my_test_class = my_test_class
  end

  def self.method_added(method_name)
    puts "#{method_name} is public: #{public_method_defined?(method_name, true)}"
    # super(method_name)
  end

  delegate :foo, to: :my_test_class, private: true
end

The source code of delegate shows that: we always define a method as public first, then change its visibility. But the method_added hook is executed between these 2 steps.

Is it possible to take into account the method visibility when defining a method? Thanks

Expected behavior

When loading MyClass, the output is foo is public: false

Actual behavior

When loading MyClass, the output is foo is public: true

System configuration

Rails version: 7.0.4.3

Ruby version: 3.2.2