# zkat/big-brain

Utility AI library for the Bevy game engine

Repository: https://github.com/zkat/big-brain
Canonical: https://ross.abutalabs.com/products/big-brain
Language: Rust
License: NOASSERTION
License Family: other
Topics: bevy
Archived: true
Last push: 2025-10-07T15:43:21+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 45, release rhythm 8, longevity 100
- inputs: {"age_days": 2245, "days_push": 330, "days_rel": 641, "gap_med": null, "n_releases_24m": 1}
- flags: archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1302, forks 82 (observed 2026-08-28T04:04:18.210829+00:00)

## What it is
big-brain is a Utility AI library for the Bevy game engine, written in Rust. It lets developers define data-driven AI behaviors for game entities by composing Scorers, Actions, and Thinkers.

## Use cases
- build utility-based AI for Bevy game entities
- make NPCs decide actions based on world state
- implement state machine-style continuous behaviors in games
- create composable, reusable AI decision-making systems
- add parallelizable AI evaluation to an ECS game

## When to choose
- you're building a Bevy game and need flexible, data-driven AI
- you want utility AI rather than rigid behavior trees
- you need concurrent, parallelizable AI scoring

## When to avoid
- you're not using Bevy or Rust
- you need behavior trees or GOAP specifically
- your project targets a non-ECS engine

## Facets
- artifact type: library
- maturity: active
- function: game-engine, simulation, agent-framework
- domain: artificial-intelligence, simulation
- platform: rust, game-engine, cross-platform
- tags: bevy, utility-ai, ecs, game-ai, behavior, game-development

## Member repositories
- zkat/big-brain (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:18.210829+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:52:12.467683+00:00, confidence not recorded.
  - readme: https://github.com/zkat/big-brain (fetched 2026-08-28T04:04:18.210829+00:00, sha 16c48b2e1d88)
  - registry_crates: https://crates.io/api/v1/crates/big-brain (fetched 2026-08-29T12:09:32.307938+00:00, sha 6b275837cd41)
- Data as of 2026-08-30T08:39:29.467469+00:00.