Ok, now I have a new concern. 
Given this tutorial,
the only way to add custom animations for existing entities would be adding the files into the stonehearth directory/smod, due to these lines in the skeleton files:
"animation_root" : "file(../animations/male)",
"effects_root" : "file(../effects)",
How could we add our own effect+animation so we can add a new animation for the humans or goblins from our own mod? Say I make a new weapon and I need a fitting animation for fighting with it. It needs to be on the rig subfolders in the stonehearth mod, which makes it totally incompatible with other mods. 