phase unphased
participant unphased:workspace steps=world-read#1
participant unphased:actor#1 "a" many steps=ask#1
participant unphased:actor#2 "b" many steps=ask#2
handoff unphased:workspace -> unphased:actor#1 types="string[]"
handoff unphased:actor#1 -> unphased:actor#2 types="string"
