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 agentmods add skills/besty0728/unity-skills/behaviornpx skills add Besty0728/Unity-Skills --skill behaviorgit clone --depth 1 https://github.com/Besty0728/Unity-SkillsWhat 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 | $0.00014 | $0.02727 |
| Opus 5 | $0.00007 | $0.01363 |
| Sonnet 5 | $0.00003 | $0.00545 |
| Haiku 4.5 | $0.00001 | $0.00273 |
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 3d 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.
- 3d 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 (1,695 stars, last pushed yesterday), licensed MIT. It adds 14 tokens to every session and 2,727 once invoked, about $0.0001 per session on Opus 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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