services.ssh-agent-switcher.enable

Whether to enable ssh-agent-switcher, a daemon that proxies SSH agent connections to forwarded agents. This allows tmux/screen sessions to access SSH agents across reconnections.

This is a per-user service that automatically starts when you log in via SSH and sets SSH_AUTH_SOCK to point to a stable socket location.

Note: This only activates for SSH sessions, not graphical or console logins.