I wonder if you are aware of this work done by the JnJ team in Belgium (@mvspeybr,@larsh), and others, presented at the European OHDSI symposium (poster link).
See also this nice video demonstrating this functionality:
This allows the distribution of cohorts to others in a network (export and import functionality). It allows every node to be the central node actually which is nice.
I think it is import these efforts are shared to avoid many people are working on the same things.
For example, to what extend can Arachne already do this out of the box? I see additional value in having it in ATLAS as well as shown here?! I think this functionality is very useful and needed and may therefore be on multiple developer's to do list. I personnally, like the better import and export buttons a lot (some may not even know this is already possible by "miss-using" the export button..).
What does the ATLAS developers team think about this? Can you consider a pull request for this @mvspeybr to the WebAPI and ATLAS github?
Also interested in the Achilles exchange workflow that is mentioned at the end of the poster.