Addon: MOB AI
Author: BedrockAddon
Survival becomes less predictable when familiar creatures no longer behave exactly as expected. This addon revises vanilla mob AI and strengthens encounters, targeting players who want a harder journey through the ordinary game rather than a separate adventure map.

A different survival challenge
The changes are intended for players who already know ordinary survival, speedrunning and the path to the Ender Dragon. Familiar encounters can require a different response because creatures receive altered AI and individual behavior.
The current release includes a behavior revamp. According to the author, achievements remain available and experimental world features are not required.
How to install the add-on
Download the .mcaddon or .mcpack file, open it with Minecraft and wait for the import to finish. Then enable the resource and behavior packs in the world settings. If the add-on requires experiments, turn them on before launching the world.