AlaAggro

Every mob in the world becomes aggressive toward players the moment it spawns — passive farm animals (chickens, sheep, cows, pigs), aquatic creatures, ambient mobs, axolotls, and modded mobs. Vanilla hostile mobs (zombies, skeletons, etc.) are left alone — they are already hostile.

Features

Universal aggression across the entire mob roster — even bats, fish, and axolotls.
Boss guard — Wither, Ender Dragon and Elder Guardian are never touched (their custom AI phases would break).
Datapack-friendly exclusion — add mobs to the entity tag alaaggro:excluded to opt them out without editing the config.
Per-player exemption — /alaaggro exempt <player> temporarily removes a player from the aggro list.
Reactive-only mode — flip a switch and mobs only attack after being hit first.
Call for help — hurting one mob alerts neighbours of the same type within a configurable radius.
Long-term memory — mobs do not forget the player when out of sight; resets on dimension change or long-distance teleport.
Damage and speed multipliers with an absolute speed cap to keep fast mobs sane.
Dimension blacklist — disable in The Nether, The End, or any modded dimension.
Multi-language — English, Русский, 简体中文, Español, Português (Brasil), Deutsch, Français, العربية, हिन्दी, 日本語.

Commands

All commands require operator (permission level 2).

Command	Action
`/alaaggro reload`	Reload the config and reapply to all loaded mobs.
`/alaaggro status`	Show current settings + active aggro mob counts.
`/alaaggro toggle`	Enable / disable the mod globally.
`/alaaggro set <key> <value>`	Change a config value at runtime.
`/alaaggro exempt <player>`	Add a player to the exempt list.
`/alaaggro unexempt <player>`	Remove a player from the exempt list.

Compatibility

Side: server-only — vanilla clients can join a server running this mod
Loader: NeoForge
License: MIT

Source

Source code, issue tracker, contribution guide on GitHub: https://github.com/Ma3auka/AlaAggro