I refactored the Typst template from two Rheo sites (https://rheo.ohrg.org and https://book.cftw.ohrg.org/) into a sidebar component in the rheo-packages registry. (Previously, this was very similar code duplicated across both repos, as the packages feature in Rheo only landed three weeks ago, which enabled this factoring out.)
I also created a rheo-author Claude skill so that Claude Code can do a better job at working within Rheo projects without me having to provide a lot of context in every prompt.