difference between stage and prime?

[Bill Janssen]

I'm trying to figure out what happens in the transition from stage to
prime.  My "stage" directory looks like a nice clean copy of my conda
env.  Good.  But the "prime" directory has some cruft in it.  For
instance, it has a "home/wjanssen" directory tree, which is clearly
*not* something I want in the snap.  There's also an "opt/goodstuff/"
tree, which contains only "opt/goodstuff/lib/libpython2.7.so.1.0".
That's in addition to "lib/libpython2.7.so.1.0".

Bill