I believe individual fields are last-writer-wins. Fancier CRDTs like text/lists are not directly supported, but I found that you can layer them on top: https://github.com/mweidner037/list-demos/tree/master/tripli...
In the future, we'll have an easier way to accomplish what Matt did out of the box so you can create re-orderable lists and collaborative text that are fast and seamlessly handle conflicts automatically