Write a tech note describing the options for implementing a client/server Butler.
Create JSON representations of common gen3 python types
Design simplified Registry ABC for butler
Jim Bosch I think this is ready for review now.
Russell Owen feel free to have a look at it as well.
Looks good. I've left some comments on the PR, and overall I think you've captured at a high level the hard problems associated with at least a read-only, everybody-reads-everything client/server butler, along with at least some of the most important problems involved in extending it to read/write.
I've merged the first draft. We can revisit if our understanding evolved.