One hub, four specialists. The hub dispatches a packet to each and collects the result — it never does the specialist's work itself. Turn a specialist off and see what happens.
The problem this replaces
One agent, every job
Everything lives in one head. When one job goes wrong, there's nowhere smaller to point at.
How it works
Every spoke is the same round trip
Same round trip for every spoke — only the packet's name changes. The specialist does the work; the hub only carries the packet.
If a specialist can't run, the orchestrator reports the missing packet — it does not write a fake schema or a fake review to fill the gap.