sharedb

There are a few codebases you can poke around in, notably ShareDB (https://github.com/share/sharedb/tree/master/examples). This article had some visibility on HN a couple weeks ago, perhaps it is what you are looking for: http://digitalfreepen.com/2017/10/06/simple-real-time-collab... The fact that that article needs 10 plus pages to describe one of the simplest use cases belies the unfortunate underlying truth: OT (and realtime co-editing) is intractably difficult for all but the most constrained data models. Which is a pity because it is undeniably cool, and why we built Convergence (https://convergencelabs.com) -- general-purpose realtime collaboration.

Thank you so much! Brian is not currently with the team. I'm personally grateful that I had to the opportunity to work with Brian as my partner before Lever on our open source efforts (http://derbyjs.com/ and https://github.com/share/sharedb), taking part in YC, and in the founding and early days of Lever.