a good while back I asked about a linter for Geany (CSS syntax checker / reporter). I've looked off / on for months - & so far found nothing mentioned to work in Geany.
It's very possible one(s) may exist & I don't have the knowledge to build it in. I didn't find any instructions (that I understood) to include a linter in a Geany build or if one existed (would work in Geany).
Definitely didn't find any such plugins.
If one exists, I might need pointing toward detailed steps - if the only ones that would work have to be added to a build of Geany. I've done a few simple builds, but never including 3rd party apps.
I don't use Windows anymore, but Notepad++ (Windows only) shows one checker style linter plugin, that uses csslint & others besides just for CSS. "homepage": "https://github.com/deadem/notepad-pp-linter" Part description: "...realtime code check against any checkstyle-compatible linter:... csslint and many others."
Thanks.