Maxed Vanilla Difficulty

Did you know there's secret difficulty values in Minecraft Java Edition? The game doesn't tell you outside of the F3 menu, but it scales up the longer you spend in loaded chunks. These secret values control many mob effects, such as spawning with armor, zombies having tools, zombies picking up said tools, having enchanted tools and armor, spider potion effects, etc. You can find all of the effects here.

This mod changes it so that the values are set to their max based off the world difficulty on all chunks, even ones not explored yet. This changes it from the gradual difficulty scaling after 63 hours to having all of the effects instantly. This allows for harder gameplay off the bat depending on the world difficulty. This changes no other behavior, leaving it to the vanilla game for chance.

This works completely server sided, so any clients without the mod can join. This can also be put on the client to change this on the internal singleplayer server. It comes with a config to enable or disable the maxing of regional or clamped regional difficulty.