This is amazing. I started doing the same, but I did not have the time to polish it.

Questions: why no X? Do you have a feature to resize (summarize?) to the text to fit into short boxes?

Maybe because of the API access issues? I built almost the same system as OP, but I had to drive a browser to post to X because the API was too expensive for a single person to afford. A few weeks ago they switched it so it's pennies a post now and I could finally integrate the API.