I don’t have Squeezebox or Harmony but yes, do have four Kodi boxes and three Google Home minis.
I haven’t tried any media rules yet mind. I envisage alerts or sound from kodi box when a trigger happens and/or sound from Google Home minis, also initiated from a trigger.
I’ve so far got things in OPenHAB in a ‘test’ form on a Windows box but have just put Ubuntu onto a NUC and have now installed OpenHab on there. So, will now move over from Windows to the Ubuntu NUC.
I did try installing OpenHabian on the NUC and was able to configure OpenHabian as described in the installation guide but got ‘lost’ getting any further but also, I was not able to see whether it was working or not since none of UIs responded.