ProtocolLib offers a range of commands, many of which remain unknown by users due to their complexity or lack of documentation. Upon investigation, I've noticed that some commands appear to be dysfunctional, with issues persisting for 5 to 6 years. For instance, the /filter command utilizes an outdated JavaScript engine that has been removed in newer Java versions. Given its obsolete functionality and potential compatibility issues, I propose the removal of this command.

In addition to addressing the /filter command, I would also like to known if there are any other broken components within ProtocolLib's commands system. I would then evaluate if they are worth fixing or start discussion about potential removal.