orchestrator
The model that runs the fleet: writes the briefs, fans the work out, reconciles what returns.
The orchestrator is the model in the middle. It takes one question and turns it into many jobs: slices the problem, writes a brief per worker, launches the crowd, and folds whatever comes back into a single answer. Not the human above (that is the operator), not the workers below (those are its subagents). The middle layer, where one becomes many and many become one again.
It has a flaw worth respecting. The orchestrator is a model too, with a finite memory, and on a big enough job it can forget what it launched before the workers come home. So the durable record of a fleet (who went out, where each one writes, what returned) lives on disk. Never only in the orchestrator’s head.