I had the following thought for lists you create yourself:
* Create list items with item-uri = list rkey + item did
Then the membership test reduces to a check if the item exists.
But that does not work for lists created through other means.
1 2Samuel
@samuel.fm
the official app just queries every list membership you've ever made and then finds ones relevent for a given list/person. I think just a new endpoint is needed
2 4