The restart tax: why tabs are the wrong unit for agent work

Terminal tabs were designed for one person doing one thing at a time, switching occasionally. Agent work is the opposite: several things happening at once, each needing a glance now and then, none needing your full attention for long.

What hiding costs

When a job is out of sight, three things happen. You forget it is running and start a second one for the same task. You miss the moment it asked a question, and it sits idle for an hour. Or you find it finished and cannot remember what you asked, so you read the whole scrollback to find out.

Each of those is a restart. Each restart is ten to thirty minutes. Do it four times a day and the agent is not saving you time anymore.

A list is not a picture

Tab titles are a list. Lists are read one item at a time. A wall of tiles is a picture, and a picture is read all at once. That is the whole difference, and it is why people run tmux with a dozen panes even though the panes are too small to read: the point is seeing, not reading.

What a tile needs to show

Three things, large enough to read from a metre away: what the job is, what state it is in, and what it last produced. Everything else can stay inside the terminal until you click in.