We are building the multiplexer for all work. Building and operating software today spans local machines, remote hosts, sandboxes, services, and production systems. It has many modes of operation: interactively with a human developer, automatically through CI and background processes, and increasingly through agents working in parallel. This work is all related, yet today's tools divide it into separate systems. Interactive tools assume a person at an interface. Automatic work disappears into jobs and logs. And as the work moves to production it lives behind separate systems and controls. AI makes this fragmentation more visible and costly, but it did not create it. System administration, continuous integration, remote development and collaboration have strained the same boundaries for decades.…