[Unit]
Description=OpenSSH Agent socket
Documentation=man:ssh-agent(1)
Before=graphical-session-pre.target

[Socket]
SocketMode=0600
ListenStream=%t/openssh_agent
ExecStartPost=/usr/bin/systemctl --user set-environment SSH_AUTH_SOCK=%t/openssh_agent
ExecStopPre=/usr/bin/systemctl --user unset-environment SSH_AUTH_SOCK

[Install]
WantedBy=sockets.target