Thank you very much for providing hnrss! I am literally reading this post because it appeared in my RSS feed. I'm also using your service to "listen" to keywords I'm interested in.
https://hnrss.org/pool is now available.
Also, forgot to mention this before, make sure to subscribe to https://hnrss.github.io/updates.xml if you want to be notified of project updates!
I'll try to add /pool to hnrss.org this weekend, too, if time allows.