UnitySkills is a REST API-based automation engine that lets AI coding agents control Unity Editor projects, including scenes and other editor operations. It is for developers using Unity with supported coding agents and IDEs. The catalogue skills and commands provide the agent workflows used to operate Unity projects through the engine.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Besty0728/Unity-Skills --skill behaviorgit clone --depth 1 https://github.com/Besty0728/Unity-SkillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/besty0728/unity-skills/behavior)<a href="https://agentmods.dev/skills/besty0728/unity-skills/behavior"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/behavior/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/besty0728/unity-skills/behavior"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/behavior.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00014 | $0.02739 |
| Opus 5.5 | $0.00006 | $0.01096 |
| Sonnet 5.5 | $0.00003 | $0.00548 |
| Haiku 4.5 | $0.00001 | $0.00274 |
Grade A, and why
unity-behavior scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 14d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 165 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Before calling any skill in this module: if you are about to call a skill with parameters guessed from its name or description, STOP — read this file (or fetch its schema via
GET /skills/recommend?includeSchema=true) first. If you already have the parameter definitions from recommend/schema, you may proceed straight to dryRun.
Triggers
- Wiring NPC/AI decision logic
- Working with behavior trees/graphs
- Reading/writing blackboard variables
- 搭建 NPC/AI 决策逻辑、使用行为树/行为图、读写黑板变量
Behavior Skills
Unity Behavior (com.unity.behavior, validated against 1.0.16) graph asset discovery, agent wiring, and blackboard variable access.
The package is optional and is not a declared dependency of UnitySkills. Every skill in this module reaches it through reflection; when it is absent each skill returns the same structured PACKAGE_NOT_INSTALLED response pointing at package_install.
Operating Mode
- Query skills (
behavior_status,behavior_graph_list,behavior_graph_info,behavior_agent_get,behavior_agent_list,behavior_blackboard_list) areSkillMode.SemiAuto— they run in all three modes without a grant. - Mutators (
behavior_graph_create,behavior_agent_add,behavior_agent_set_graph,behavior_blackboard_set) areSkillMode.FullAuto— under Approval they need a user grant; under Auto / Bypass they execute directly. - No skill in this module carries
SkillOperation.Delete, so none is auto-forbidden in Approval / Auto mode.
Prerequisites
Install the package first if behavior_status reports installed: false:
package_install packageName="com.unity.behavior"
Installation triggers a Domain Reload; wait for it to finish, then call behavior_status again before using any other skill in this module.
The two asset types (read this before binding graphs)
A "Behavior Graph" .asset file contains two objects, and mixing them up is the most common failure:
| Object | Role | Where it lives |
|---|---|---|
BehaviorAuthoringGraph |
Editing representation — nodes, blackboard, story. Main asset. | The .asset file itself |
BehaviorGraph |
Baked runtime graph. What BehaviorGraphAgent.Graph actually requires. |
Sub-asset nested inside the same file |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 14d ago Changed c0af817f6595
- 1mo ago First seen · 165 lines · 14 tokens per session scan A 8d92ee1b059a
unity-behavior is a skill published in the GitHub repository Besty0728/Unity-Skills (1,864 stars, last pushed today), licensed MIT. It adds 14 tokens to every session and 2,739 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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