ModsFinder

SmartBrainLib

by Tslat

Brain-driven mobs gain a usable framework from SmartBrainLib, a library that rebuilds the vanilla brain system for entity AI on Fabric, Forge, NeoForge and Quilt.

FabricForgeNeoForgeQuiltServer-side onlyMozilla Public License 2.0Open source1.16.5 – 26.3

What it does

The library replaces most of the vanilla brain functions with high-efficiency code, aiming to remove the inefficiencies in the brain system. Developers can register sensors, memory types and behaviours without working out which memory modules an entity needs, and behaviours can be added, removed or changed on an existing entity while the game runs.

Behaviours are built on an extensible class that supports callbacks, predication and cooldowns. The library also adds extra sensors, behaviours and memory types usable by any entity. Fabric API is required. It is server-side only and open source under the Mozilla Public License 2.0, published for 1.16.5 – 26.3 and 28 release versions across Fabric, Forge, NeoForge and Quilt. Forty other mods require it, including Mobs of Mythology, Occultism, Dark Waters, Enchanted: Witchcraft and CorndumGuardianReborn.

Key features

  1. Simplified memory registration

    Memory modules are handled automatically, so entity developers do not need to register each one by hand.

  2. Dynamic sensors

    Sensors can be configured and handled at runtime, allowing more advanced detection logic.

  3. Extensible behaviours

    Built-in behaviours can be used directly, or new ones created from a base class with callbacks, predication and cooldowns.

  4. Runtime behaviour editing

    Behaviours can be added, removed or modified dynamically on an entity that already exists.

  5. Brain interface utility

    An interface lets non-SBL entities have brain content added or removed.

Compatibility

Latest build for each game version and loader.

26.x3 of 3 versions with builds
26.32.0.32.0.32.0.3Not available
26.22.0.32.0.32.0.3Not available
26.1.22.0.32.0.32.0.3Not available
1.21.x11 of 11 versions with builds
1.21.111.16.11Not available1.16.11Not available
1.21.101.16.111.16.11.11.16.11Not available
1.21.91.16.111.16.111.16.11Not available
1.21.81.16.101.16.101.16.10Not available
1.21.71.16.101.16.101.16.10Not available
1.21.61.16.81.16.81.16.8Not available
1.21.51.16.71.16.71.16.7Not available
1.21.41.16.71.16.71.16.7Not available
1.21.31.16.41.16.31.16.4Not available
1.21.11.16.111.16.111.16.11Not available
1.211.14.51.14.51.14.5Not available
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
1.18.x1 of 1 version with builds
1.16.x1 of 1 version with builds
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Required by 40 mods

Mobs of Mythology1.19.2 – 1.21.1Occultism1.18.2 – 26.3Dark Waters1.17.1 – 1.20.1Enchanted: Witchcraft1.18.2 – 1.21.1CorndumGuardianReborn1.19.2 – 1.20.1The Midnight1.12.2 – 1.20.1

Use cases

Complex mob AI

Mod authors building mobs with layered interactions can use the brain system without the vanilla implementation's complexity.

Experimenting with brain AI

Developers who want to test brain-based behaviour rather than the goal system can use the library's ready-made parts.

Who it’s for: Mod developers who build mobs and want a configurable brain system. Server owners running mods that depend on it need it installed on the server only.

Questions

Does SmartBrainLib need Fabric API?

Yes. Fabric API is listed as a required dependency, so it must be installed next to SmartBrainLib.

Does a player need SmartBrainLib installed?

No. Players join without it, since only the server has to run the mod.

Is the library simpler than the goal system?

At face value the goal system is simpler, and this library targets interactions that the goal system handles poorly.

In the catalog

SmartBrainLib is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 8,071 mods support Minecraft 26.3.

Library mods3,514Fabric modsMods for 26.38,071

More from Tslat

All projects
TslatEntityStatus1.16.5 – 26.3Advent Of Ascension1.12.2 – 1.21.1PassiveMobs1.16.5 – 26.3TslatEffectsLib1.19 – 1.21.5

Similar mods

Fabric API1.14 – 26.3Cloth Config API1.14 – 26.3YetAnotherConfigLib (YACL)1.19 – 26.3Architectury API1.16.5 – 26.3Just Enough Items (JEI)1.8 – 26.3Geckolib1.12.2 – 26.3

What the author says

A brain library for Minecraft, making the brain system easier to use and manage. 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.
Tslat, on the Modrinth page

Official listing

Owner
Tslat
Published
2022-12-17
Updated on Modrinth
2026-10-05
Facts verified
2026-10-15

Tags

LibraryMobsUtility
Open on ModrinthCompare