This looks really cool. I've actually been hacking on something very similar to this myself, although with clojure/script on the server / browser. The adapter architecture and equivalent nodes was something I first saw with PouchDB. ~830KB seems quite large for the browser library though.

This could be exactly what I need, AES GCM field-level encryption support is a godsend. Unfortunately seems like it’s planned and not ready. If I hadn’t just finished rolling out a sync feature built around the Matrix protocol, I would have loved to properly try this out.

I see no mention of foreign keys or other relational db features. Does it support them or is just a persistance layer for a simple kv CRDT?

most excellent