Creepers are nice mobs, but when you are building a city in survival and that creepers constantly destroy what you are building, well this is really annoying.
In our server, we still want creepers to be part of the game, we just don't want them to blow up whatever we're making.
So, I've made this mod so that others, like us, may benefit from this change.
And no, changing the gamerule (mobGriefing) is not what we want. We still want zombies breaking doors and everything else. We just don't want creepers to destroy stuff. Game remains unchanged.
I will not port this mod to any other API, and I will not backport it either.