phase unphased
participant unphased:actor#1 many steps=ask#1
participant unphased:actor#2 "planner" steps=ask#2
participant unphased:actor#3 many steps=ask#3
handoff unphased:actor#1 -> unphased:actor#2 types="Draft"
handoff unphased:actor#2 -> unphased:actor#3 types="string[]"
