Well, It seems as though they either work for a short time, (in the case of esp) or don't work at all.
Also, I'm not sure if toggling is working correctly for them, or it's reversed. (Darker means it's selected, right?)
The selected dark border actually means it's turned off at the moment, which will be changed soon. Also, the way addons work is that lua/init.lua is the file that will get auto loaded by the system. Autorun doesn't work in addons currently.
Another bug: Just to mess around, I set it to add velocity upwards upon dropping an item. It works up until the player dies, at which point I believe the hook stops functioning as it should. I tried with different blocks as well. Saving and loading allowed it to work again, but again only until I died from falling.
Which hook exactly are you referring to?