When does the new Dependencies reload libs?

I'm developing a library called Hark. The structure is:

lib/
  hark/
    session.rb
    mixins.rb
  hark.rb

hark.rb:

What version of Rails are you on? The app works as shown above, the
issue is that it just doesn't reload, correct?

- rob

Right. This is on Edge rails, which has a new dependencies library that (I
thought) is supposed to reload anything that's magically included. The
problem, I suspect, is that my includes aren't being magically included...
but I don't know why that is.

Jay