Part of the confusion here is likely that the tool, as seen on the web, probably lags significantly behind the code. I've started using a related but different tool (https://filiph.github.io/napkin/).

The HN mods gave me an opportunity to resubmit the link, so I did. If I had more time, I'd have also upgraded the tool to the latest version and fix the wording. But unfortunately, I didn't find the time to do this.

Apologies for the confusion!