A member's tmux server keeps the version it started with until their last
pane closes, but the dashboard asked it with TMUX_BIN, the newest tmux: a
3.8 client on a 3.6 server spun it at 100% CPU (three members needed a
manual kill on 2026-10-15).
- /opt/agenthub/libexec/tmux-member (install-system, in sudoers): runs a
member's tmux call with the binary of THEIR running server
(/proc/<pid>/exe, found from the socket in /proc/net/unix), else
TMUX_BIN. It runs as the member and execs only a process they own.
sudoArgv uses it once installed (linux-accounts readConf), TMUX_BIN
until then.
- Users → Members' tmux (GET /api/users/tmux): each member server's version
beside the installed one, sessions, agents working. An admin restarts one
(POST /api/users/:id/tmux-restart) or every idle outdated one
(POST /api/users/tmux-restart-idle), with their password again, audited
per member; a server that will not stop answers 409 ETMUXSTUCK naming
its pid for root.
- server-s3-system.test.js: `delete` is a provision action since Delete
user, so the "unknown action" case now uses `purge`.
Operators: run `sudo agenthub server install-system` once.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
