I've gone ahead and entered this in the current Home Automation contest.

I don't have a whole lot of expectations here; this project is extremely simple, and partly relies on the work of others to be complete.

But the thing about Home Automation is that getting stuff to just work is actually quite rare. And I've done a whole lot of HomeKit stuff, and it turns out that this particular garage door integration is one of the most reliable things I've done so far. So that ought to count for something.