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SmartBrainLib (Forge/Fabric/Quilt) logo

SmartBrainLib (Forge/Fabric/Quilt)

Mod

by Scimiguy

A smarter brain system for Minecraft

Type

Mod

CurseForge Downloads

76,755,640

CurseForge ID

661293

Modrinth Downloads

6,194,097

Modrinth ID

PuyPazRT

Last Updated

Sep 12, 2026

Description

A brain library for Minecraft, making the brain system easier to use and manage.

What is this?

The brain system in Minecraft is an almost cryptic new entity AI system that Mojang introduced to handle more complex mobs, and allow for more advanced entity handling. Unfortunately Mojang's implementation is lacking, and overly complex. Additionally, it's also done in a rather inefficient way, which means that overall the system is not worth using in place of the existing goals system. This library aims to overhaul the brain system, making it actually usable, and configurable. Note however, that the existing goal system will still be simpler at face value - the brain system is intended for more complex interactions, but it can also be fun to experiment with.

So what does SmartBrainLib do?

SBL is a multi-facet approach to the brain system, and will continue to expand and improve as I use it. Here are its main features:

Auto-handles memory types

Don't worry about having to work out which memory modules to register for your entity.

Dynamic sensors

Sensors can now be dynamically configured and handled. This allows for much more advanced and flexible sensors

Advanced behaviours

Utilise built-in, or create new behaviours based on an extensible behaviour class, which builds in callbacks, predication, cooldowns, and more.

Runtime-safe behaviour modification

Add, remove, and modify behaviours dynamically from an existing entity.

Optimisation

SBL replaces almost the entirety of the vanilla brain system's functions, using high-efficiency functions to remove the inefficiencies in as many areas as possible of the brain. Done right, an SBL entity could be even more efficient than one using goals!

Additional sensors, behaviours, and memory types

SBL builds in additional modules for use in any entity, with more to come over time.

Added utility functions

As well as the expected brain functionality, SBL additionally adds additional helpers, such as:
  • Optimised level entity-getter functions
  • Developer-friendly Random library
  • Brain interface utility for adding/removing brain content from non-SBL entities

How do I use it?

The library is documented on its Wiki Page

If you have issues or want to contribute, please jump on the Github Page and make your voice heard

Compatibility

Mod Loaders

Fabric Forge Neoforge Quilt

Game Versions

1.16.5 1.18.2 1.19 1.19.1 1.19.2 1.19.3 1.19.4 1.20 1.20.1 1.20.2 +16 more

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

LEGO Minecraft Set

LEGO Minecraft Set

Official sets that translate the building side of the game off-screen.

View on Amazon →

As an Amazon Associate I earn from qualifying purchases.

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External Resources

CurseForge Modrinth Source Code Wiki Issues