Every commit is just one small change. Let's take a look at a few.
This means that the AI will try to use more effects at end of turn. ZoneAffecting is a scripting keyword which is used to create cards.
This commit changed 3 things. Apparently Akki Coalflinger wasn't working (an update probably broke him) and the AI has a hard time using complex cards like Pyrohemia (which deals damage to all creatures) and Swans of Bryn Argoll, which ignores damage but turns that damage into card drawing (1 damage = 1 card drawn by your opponent).
Magus of the Moon and Blood Moon.
Both cards turn non-basic lands into mountains.