ai-behavior-trees-utility-ai SKILL.md skillA
ai-behavior-trees-utility-ai from gamedev-skills/awesome-gamedev-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add gamedev-skills/awesome-gamedev-agent-skills/ai-behavior-trees-utility-ai@git:20260824.3f65124Pins git:20260824.3f65124 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- gamedev-skills/awesome-gamedev-agent-skills
- Path
skills/disciplines/ai-behavior-trees-utility-ai/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260824.3f65124, committed Aug 24, 2026
- First version recorded
- Aug 24, 2026
- Size
- 8,255 bytes
- Repository stars
- 1,784
- License
- Apache-2.0
Build a production behavior-tree runtime (Blackboard, action/condition leaves, sequence/selector/parallel composites, decorators) and a Utility AI system (response curves — linear, exponential, sigmoid, quadratic — considerations, and action evaluators), plus hybrid BT-drives-Utility agents. Use when implementing a reusable behavior-tree or utility-based decision system, or tuning enemy/NPC decisions beyond a simple FSM, or when the user mentions behavior tree, blackboard, decorator, selector…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Behavior Trees & Utility AI Two complementary ways to structure NPC decision-making, plus how to combine them. A **behavior tree (BT)** expresses *structured, prioritized, reactive* logic as a tree that is "ticked" each step. **Utility AI** answers *"how much do I want each option right now?"* by scoring actions with normalized curves and picking the best. Ship believable agents by using a BT for structure and Utility AI where graded trade-offs matter. This skill is the **implementation** companion to `game-ai` (which helps you *choose* between FSM / BT / steering / pathfinding). Read `game-ai` to pick a model; read this to build the runtime. ## When to use - Use to build a **reusable BT runtime**: a `Blackboard`, `Node` base, action/condition leaves, `Sequence`/`Selector`/`Parallel` composites, and decorators (Inverter, Cooldown, Repeat). - Use to build a **Utility AI** decider: response curves, considerations, and an evaluator that scores and selects actions (max, softmax, or weighted-random for variety). - Use to build **hybrid AI** — a BT whose leaf delegates the "which attack / which target" choice to a utility evaluator. …
Read the whole file at its exact version.
How to install
mdr add gamedev-skills/awesome-gamedev-agent-skills/ai-behavior-trees-utility-ai@sha256:185960eddb169cb8The line at the top of this page pins the label git:20260824.3f65124, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ifcoyi6ft3xgxsbd)
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Versions
The registry has recorded 2 versions of this file, all committed on Aug 24, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260824.3f65124 latest | 2026-08-24 | 3f65124 | 8,255 B | A | view · diff |
| git:20260824.89361de | 2026-08-24 | 89361de | 8,494 B | A | view |
Audit of the latest version
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- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8255 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
gamedev-skills/awesome-gamedev-agent-skills · 1,784 stars · license Apache-2.0 · pushed 2026-10-09 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ifcoyi6ft3xgxsbd GET https://markdownregistry.com/api/v1/resolve?ref=gamedev-skills/awesome-gamedev-agent-skills/ai-behavior-trees-utility-ai GET https://markdownregistry.com/api/v1/blob/185960eddb169cb81490e0d01efb9240663b8a465ca34ec34e0f015a727f06e4
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.