For about a year, in my spare time, I have run a small operating model: four AI agents with separate jobs, 28 services beneath them and one person accountable for all of it. One of its users is a real small business, whose outbound email waits for a thumb on my phone.
I treat it as a wind tunnel. It shows cleanly where the decisions sit, what machine work costs and how such systems fail, because nothing else gets in the way. It says nothing about works councils, safety regulation or an ageing ERP system, and I try not to pretend otherwise.
What it has taught me so far is unfashionably old. The hard problems were delegation, signing limits, incident reviews and handover notes. Any plant manager would recognise them.
The firm of one is a private project, run in private time on private equipment. It touches no employer data.