German also works great.

This looks and works great! A settings option to keep no recording history at all would be terrific.

It’s in the debug menu right now (ctrl/cmd+shift+d)

It's rather unlikely the RuntimeDirectory= contains state as it's wiped on service stop unless RuntimeDirectoryPreserve= is set. NB: these days, /var/run/ is a symlink to /run/

Unfortunately, that's not possible. However, as NixOS modules usually are Systemd services, the StateDirectory= of the service is a good starting point (systemctl cat <service>).