This is an updated required dependency mod for any of bskprs' mods to work. It contains the core shared classes used by all bspkrs' mods. If you don't install it along with any of the other bspkrs' mods, Minecraft will crash.
Original bspkrsCore mod: https://www.curseforge.com/minecraft/mc-mods/bspkrscore
Original discussion: https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-mods/1282347-bspkrs-mods-armorstatushud-directionhud