The license in the source does not match the license on the curseforge page for the mod. The source has has it listed as CC0 , curseforge has it as CC BY-NC-ND 4.0.

That is (sort of?) intended, as the previous Forge code was licensed in CC BY-NC-ND 4.0, but the current state of the repository is a rewrite for fabric. If you need the forge reference code, I can create a new branch for it.