Subscriptions question: Single prisma server, two graphql servers both exposing different parts of the underlying Prisma schema; IF I open a subscription to listen for new items of type X on server A, and create those items via server B, will they be picked up and returned by the open subscription on server A??

Yes, if the underlying Prisma type is the same.

so that means that in effect server A does a subscription query in turn on the base prisma server, right? (of course for the same type)

Yes, the subscription is mapped through to the Prisma server.

cool, thanks for your help