phase phase#1
participant phase#1:workspace steps=world-read#1~phase#1,world-read#2,world-read#3
phase phase#2
participant phase#2:actor#1 "optimizer" steps=ask#1
phase phase#3
participant phase#3:workspace steps=world-read#1~phase#3,world-read#4
phase phase#4
participant phase#4:workspace steps=world-read#5
phase phase#5
participant phase#5:workspace steps=world-read#6
participant phase#5:actor#2 "consultant" steps=ask#2
phase phase#6
participant phase#6:workspace steps=world-read#7
handoff phase#5:workspace -> phase#5:actor#2
