Fails to generate/update class intermediaries on alpha(?)/infdev/indev/classic versions due to folders

[SolDev69]

As you can see only method names are mapped properly, class names are not.

[Juuxel]

You can control this using the --obfuscation-pattern command line option, which takes a regex pattern that matches obfuscated class names. The default pattern matches the class names used by modern Minecraft (which are in the root package), so your classes are excluded if you don't manually set it to something else.