Stops friendly fire. Player companions can't damage the player, the player can't damage companions, and companions can't damage each other.
I got tired of accidentally killing my guar companions, blowing up my fighter companions, and getting blown up by my mage companions, so I wrote this little script.
The script keeps a cached list of followers that is refreshed at the following instances:
* Player changes cells
* Player tells follower to follow or wait
* Player casts conjuration spell
If you have [More Attentive Guards](https://www.nexusmods.com/morrowind/mods/48622) version 1.1.4 or greater installed, then following guards won't be counted as friendly by this mod.
Spells with any harmful effects will be resisted when friendly fire is detected, even if not all of the effects are harmful. I don't think there's a way around this, other than not making spells like that.