One prompt → the boss spawns foodie, guide, historian in parallel → one merged itinerary.
■ boss (trust 3)■ foodie (trust 1, no tools)■ guide (trust 1, read_file)■ historian (trust 1, read_file)
bossbriefing…
foodie
waiting
guide
waiting
historian
waiting
Governance ratchet: children may only be safer than the boss — the specialists run at trust level 1
with a narrowed tool allowlist. A spawn that tried to widen either would be rejected.