A typical character in packed folder format looks like this:



Most of these are self-explanatory:

.skel = skeleton
.rig = rig
.shp = mesh

But I'm not sure why the animation data's extension is char_base. What does it mean? And what's the rule behind it?

And more importantly, does the pattern **/*.char_basealways all the animation data? Or it can be other char_xxx?

I think it's actually the path to the character rig, /character2.char/base.rigwith ".rig" removed and slashes replaced with underscores.