AvAI
by Emanuel71836
AvAI replaces the default mob AI of Minecraft with a decision tree approach, aiming for more dynamic, context-aware behavior in mobs.
What it does
Vanilla mobs follow goal-based AI. AvAI swaps that system for a decision tree, so a mob chooses its next action by checking its surroundings in order. The author describes the approach as experimental, with decisions based on the environment, and some intended reactions such as mobs responding to sunlight are implemented while others are still in progress.
AI processing runs across multiple threads, which means the mod depends on a CPU with several cores to work as intended. The author notes that the mod is incomplete and that bugs should be expected. Because it changes mob AI directly, it can clash with other mods that change the same behavior, such as Lithium.
The mod is a server mod that players do not have to install: the server needs it, while clients may add it. Only one Fabric file exists, 0.0.1 for 1.21.11, released on 2026-03-01 on the alpha channel. The mod is not open source and is released under All rights reserved.
Key features
Decision tree mob AI
Mobs select their behavior through a decision tree rather than the default goal-based system.
Environment-based decisions
Decisions take the surrounding conditions into account, an approach the author labels experimental.
Multi-threaded processing
Mob AI is computed across several threads, so the work is spread over multiple CPU cores.
Sunlight reactions
Some intended behaviors, such as mobs reacting to sunlight, are implemented, while others are still expected.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Testing alternative AI
Developers and modpack authors who want to observe mob behavior driven by a decision tree can run the mod on a server to see it in play.
Experimenting with mob behavior
Server owners who want to try context-aware mobs can install the single Fabric build on a test world before using it elsewhere.
Who it’s for: The mod suits server owners and testers who accept an incomplete, experimental build. Players on clients without the server-side install need nothing beyond the normal setup, since the client side is optional.
Questions
Does AvAI need to be installed on the server?
Which loader and versions does AvAI support?
Can AvAI be used alongside Lithium?
In the catalog
AvAI is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
AvAI replaces Minecraft default mob AI system with a decision tree–based approach, aiming to create more dynamic and context-aware behavior. Some intended behaviors (such as mobs reacting properly to environmental conditions like sunlight) are not fully implemented yet and may not work as expected.
Official listing
- Modrinth page
- modrinth.com/mod/avai
- Owner
- Emanuel71836
- Published
- 2026-02-28
- Updated on Modrinth
- 2026-03-01
- Facts verified
- 2026-10-15