phase unphased
participant unphased:workspace steps=world-read#1
phase phase#1
participant phase#1:workspace steps=world-read#2,world-read#3
participant phase#1:actor#1 "reviewer" steps=ask#1,ask#2
handoff phase#1:workspace -> phase#1:actor#1 types="string"
handoff phase#1:actor#1 -> phase#1:workspace
