I am aiming to improve the integration of Rockstar into yt. I have started doing this by making the rockstar stuff in halo_objects.py behave more similar to existing halo machinery. I am also going to parse the rockstar binary files so we can recover the particle IDs for halos which will allow particle analysis of rockstar halos. My goal is to issue a PR once I have the following working:
Can run rockstar.
Can save and load the output to disk using .dump() and LoadHaloes like the other halo finders.
Can access the particle data for each halo from yt.
Have updated the docs to reflect the changes I've made.