Harald, may I ask you to keep consistency in atlas.asset naming when there is only one skeleton in the spine project?
"packTarget": "perskeleton"
Imagine I have spine project "TEST" and inside have one skeleton called "SKELETON".
Now export that project into unity with packTarget:"single".
One would expect that I get TEST_Atlas.asset but instead I get SKELETON_Atlas.asset
If I add one more skeleton into the project then suddenly I get TEST_Atlas.asset, which is correct behaviour.
Does it make sense? Thank you, Marek.