It looks like he has his emacs config on github [0]. emacs-modeline-mode-line{,2}.org [1] are probably what you're looking for.

[0] - https://github.com/howardabrams/dot-files/blob/master/emacs....

[1] - Yes, he writes his configs in org-mode. This is the first time I've actually seen literate programming used and it's beautiful.