Explicitly annotating client-side classes and members with @Environment(EnvType.CLIENT) will help tools identify when people are trying to call client code from a common/server context.
Currently, this will be useful for my mcdev fork, but it will also be useful for anyone else wanting to make a static analysis tool to this effect.

This is no longer required since we built with split source sets. All client only classes will now always have the annotation in a mod dev/prod env 👍