I would be happy to create such a system myself though I don't have Airpods. I have Beats Flex and perhaps I could somehow control the input with double volume up and down clicks. Or just use my phone somehow. Would you be willing to write more about your setup, perhaps a blog post?
Since this has garnered some interest, I definitely will sit down and write a blog post when I have a little bit of time. I have upgraded the setup since that post a few days ago, and keep doing so continuously; it's always running in the background while I work. There are some rough edges, but the workflow feels like what Siri should have been.
