SystemD user service for launching weechat in a screen on boot

weechat.service

# Save as ~/.config/systemd/user/weechat.service
# Remember that you need to allow background processes to keep running
# even when there are no interactive sessions:
# sudo loginctl enable-linger username
# And then: 
# systemctl --user daemon-reload && systemctl --user --now enable weechat.service

[Unit]
Description=weechat session
After=bitlbee.service

[Service]
Type=forking
ExecStart=/usr/bin/screen -U -d -m -s /bin/bash -S weechat -T screen-256color /usr/bin/weechat
Restart=always

[Install]
WantedBy=default.target

irssi variant:

[Unit]
Description=irssi session
After=bitlbee.service

[Service]
Type=forking
ExecStart=/usr/bin/screen -d -m -s /bin/bash -S irssi /usr/bin/irssi -c efnet
Restart=always

[Install]
WantedBy=default.target