A single production agent still takes six vendors and six invoices. That's my read on why agent counts stay so low inside most companies. Building a useful agent got easy this year, and running one in production is where most teams still stall. The harness comes from one project, the sandbox from a compute vendor, tokens from an inference provider, storage from a cloud, a frontier lab for the hard steps, tools from a search API, and someone writes the glue holding it together. By month end…