F5 Next - how to reference irule procedures

I have not tested this as I have no time at the moment but have you tried How to: Create and manage iRules on BIG-IP Next Central Manager (f5.com) to create the 2 irules in the /api/v1/spaces/default as shown in the article that seems like the F5 Common partition for the normal BIG-IP.

Then you can attach the irule that references the process to your app and try ""call other_rule::my_proc $args"" or ""call /other_partition/other_rule::procname args"" as shown in call (f5.com) as the other partition could the "default" one. Also test without specifying a partition as maybe it is not needed as the two irules could be in the background in the same place.

Also your call call "/app/default:service_2/proclibrary::responder" seems strange as you can test it to be just  "/app/default/<irule>::<prco>" name that is as you deployed it in the GUI not as in the description, for example "/app/default/proc_irule::proc_1".

If nothing works you can join the Group: BIG-IP Next Academy | DevCentral (f5.com) as maybe the question could get an answer there.