See Queerbric/Inspecio#66
LambdAurora says not to rely on the implementation class.

Of course it's bad to rely on an implementation class but currently that part of the api is lacking.
There is already a plan to handle this but not any time soon.

CIT Resewn never claims to support this "quiltified fabric api" and if mods want to support other things, they shouldn't bundle a FAPI that is not the official Fabric API implementation.

Just thought of a better solution.

Ok, I removed the usage of impl fapi. This should be fixed now(still targeting the v1 release tho).

(for future reference)

Mods now have to use their own namespaces to override the global cit.properties instead of using the minecraft namespace.
This should remove the need to have separate layered mod resourcepacks from the grouped fapi pack.