Here's a little context on Delta (https://github.com/slab/delta-elixir) and the linked blog post:
Delta is a format to describe documents' contents and how it changes over time. This is a core piece of technology at Slab, that powers our real-time collaboration engine, thanks to the built-in support for Operational Transform (think multiple users working together in Google docs).
Though we've been using it internally for almost 4 years now, we're finally open-sourcing it to the wider Elixir community.
Would love your feedback!