The grants part composed the engine's subscriptions from catalogue.EngineVerbs at its own mesh-sdk pin, so mesh-host #184's optional verb composition was refused on every node and every engine reopened its link every four minutes. Quick fix: re-pin the grants part. Thorough fix (this): the seat's subjects on the engine's node, any verb, as a module answers mesh.mod.<module>.tool.>; callers stay granted per verb.