How do I make an animation library?

Hi, with the new pose library / content browser (best feature ever!) - is it possible to store not just poses, but full animations? I have always wanted to make re-usable animations for different characters using the same rig, that would save me tons of time.

But I can’t tell if this is possible (yet)?

Yes. Store your animation as an action. Then you can import your actions to another file. Select your armature in the new file and then select the imported action in the action editor in the new file and it should work.