Because of multiple version available I added the support for 2 of them (Code - OSS and VSCodium, both tested on manjaro Xfce).
I managed to make it work however by creating new extension using 'yo' (with the code copied from your repo) as npm had problem with direct copy of your repository (couldn't find a module). I'm commiting here just extension.js file so it shouldn't matter.
Because of multiple version available I added the support for 2 of them (Code - OSS and VSCodium, both tested on manjaro Xfce). I managed to make it work however by creating new extension using 'yo' (with the code copied from your repo) as npm had problem with direct copy of your repository (couldn't find a module). I'm commiting here just extension.js file so it shouldn't matter.