I finally cleaned up and released my Hugo preview plugin for #KDE's Kate on Invent:
https://invent.kde.org/redstrate/site-preview-kate
It's available on my COPR if you're using a Fedora-based distribution:
https://copr.fedorainfracloud.org/coprs/redstrate/personal/builds/
(I can't find my original post so :BlobCat_SmilignOpenMouthSweating:)