I finally got back to working on home automation today and got the alarm system defined to Homebridge, which makes it visible on the Home app on our phones. It was surprisingly easy to do.
The next step is to get the lights and light switches to have the same behaviors with Homebridge and HomeKit as they do under Indigo; that’s mostly straightforward, but I don’t yet know how to detect and process a double-tap of a switch, which I use to do some “extra” tasks (like turning off all the lights in a room instead of just the one that the switch controls).
Shabbat Shalom!