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The Session table named the machine a pane's shell was on but never the distance to it. A remote workspace gone slow looked exactly like one that had not, and the only way to tell them apart was to leave tty7 and ping the box by hand — with nothing to say whether tty7's own link was the one that was slow. Time the control link's `Ping` and put the last measurement on a `latency` row, drawn only where there is a network between here and the shell. Every ping that comes back feeds it, the keepalive's included, so a link being kept alive already carries a number before anyone asks for one. Nothing else is timed: every other request does work on the far side, so its round trip measures that work rather than the link, and a `ReadFile` of a large file would read as a network seconds slow. The poll rides the Info panel's existing process-and-port round, and only while the panel is open — that round also runs with the panel shut, watching for ports to forward, and a round trip for a row nobody can see is the far end's time spent on nothing. A link that drops keeps its last measurement rather than blanking: a dropped link is exactly when someone is reading the row to work out why a pane stopped answering. Claude-Session: https://claude.ai/code/session_01FG2s9mbZu6LbjjmU54X7kt