I wrote a mesh cache exporter for Houdini to Blender a while ago when Blender didn`t have Alembic. It worked decently and was very fast and it used a python output node in Houdini.
I wasn’t sure if this was legal to use with Apprentice but another Blender user asked on the Houdini Forums and they said that it was legal to export. I can not find the thread on the sidefx forums anymore, though, so it would probably be best to ask again.
Here is the link to the BA thread of the importer/exporter. I think it only works for 2.79 but once it is in 2.79 it can be alembict or mesh cached to 2.80.