Yep, most sources are org-mode, there are few ipython notebooks too.
Hakyll in HTML sources is actually just an artifact left in my template, from the times when I did use Hakyll. Should probably remove it.
I found it a bit overkill for my purposes and often overly restricting me, so I've switched to a Python script to generate everything: https://github.com/karlicoss/beepb00p/blob/master/src/build....
It's a bit ad-hoc, but ended up the same length as my old Hakyll code, and allows me to experiment much faster.
Offtopic: how did u create the blog? Did you use WordPress? If so, which theme? If not, what UI library did you use?
I ask because I have a blog myself which looks like crap haha.