systemd/user/weechat.service

   1 [Unit]
   2 Description=Start weechat in detached tmux session
   3
   4 [Service]
   5 Type=forking
   6 Restart=on-failure
   7 ExecStart=/usr/bin/tmux -f %h/.config/tmux.conf new-session -s weechat -d weechat
   8 ExecStop=/usr/bin/tmux kill-session -t weechat
   9
  10 [Install]
  11 WantedBy=default.target