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 skill-creatorgit 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/skill-creator)<a href="https://agentmods.dev/skills/besty0728/unity-skills/skill-creator"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/skill-creator/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/skill-creator"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/skill-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00041 | $0.02037 |
| Opus 5.5 | $0.00016 | $0.00815 |
| Sonnet 5.5 | $0.00008 | $0.00407 |
| Haiku 4.5 | $0.00004 | $0.00204 |
Grade A, and why
skill-creator 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 today.
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 — 118 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
- Writing your own custom skill for your project
- Extending what agents can do in this specific Unity project
- Learning the [UnitySkill] metadata contract and discovery rules
- 为自己的工程编写自定义技能、扩展 Agent 在本工程可调用的能力
Skill Creator (advisory)
Audience: an agent (or developer) adding a custom skill to your own Unity project, not to the UnitySkills plugin source. A custom skill is a public static method marked [UnitySkill] compiled inside your project's Editor code; the server discovers it automatically — you never edit the plugin.
Where the C# must live
Put the file under Assets/ in an Editor-only location (e.g. Assets/Editor/UnitySkillsCustom/MySkills.cs, or any asmdef whose platform is Editor). The plugin's editor asmdef has autoReferenced: true, so Assembly-CSharp-Editor and ordinary user Editor asmdefs see the public API without adding references.
- Never put custom skill code inside the package (
Packages/com.besty.unity-skills/) orLibrary/PackageCache/: package updates and self-update replace that whole tree and your file is wiped. - The class need not be a MonoBehaviour; a plain
static classis fine.
Compile and discovery loop
After you write the C# (through script_create with the full content, or by any editor), Unity recompiles and performs a domain reload. The router re-runs TypeCache.GetMethodsWithAttribute<UnitySkillAttribute>() on the next request, so the new skill is registered automatically — there is no restart, no list to update.
Recommended agent flow:
- Check the name is free:
GET /skills?q=<prefix>or readGET /skills/schema?names=<cand>&wire=v2. script_create { scriptName, folder: "Assets/...", content: <full source> }— returns{ path, jobId, waitUrl }.- Wait for compile:
GET /jobs/<jobId>?wait=90(retry through the reload); inspectresultData.compilation.errors.script_get_compile_feedback(scriptPath)gives on-demand diagnostics. - Confirm registration:
GET /skills/schema?names=<your_skill>&wire=v2should return your skill with its description and parameters. - First real call with
?mode=dryRun.
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.
- today First seen · 118 lines · 41 tokens per session scan A 384bf66a2ff7
skill-creator is a skill published in the GitHub repository Besty0728/Unity-Skills (1,862 stars, last pushed today), licensed MIT. It adds 41 tokens to every session and 2,037 once invoked, about $0.0002 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 2026-10-17.
Other skills, from other repositories
pufferlib
Version-aware guidance for PufferLib reinforcement-learning environments, vectorization, policies, PuffeRL training, evaluation, and safe checkpoint review. Covers the native 5.0 build and environment API, published 3.0.0 Gymnasium/PettingZoo adaptation, and a pinned historical 4.0 profile.
dotcraft-unity
Use when dotcraft-unity MCP, CLI, or unityexecutecsharp is available, or when the user asks to inspect, automate, capture, or debug Unity Editor state, scenes, assets, Console logs, or GameView output. Provides background-first Unity Editor automation through MCP or CLI.
unity
Inspect, automate, and debug a running Unity Editor. Use for Unity scenes, assets, project state, Console logs, and Editor C# execution.
immersive-vibration-response
Provide autonomous, low-power haptic feedback and a playful, opinionated interaction style for players through the local ESP32 vibration bridge. Use for interactive games, embodied-agent play, roleplay, simulations, live narratives, and long-running creative or coding tasks whenever game events, decisions, task…
2dimg2motion
Use when a user provides one baseline image and requests game animation frames, sprite sequences, attack/walk/idle/hit/death/casting motion, transparent PNG frames, a spritesheet, keyframe prompts, or consistent whole-character pose animation.
img2mo-learn
Learn reusable 2D motion-generation knowledge from user-specified action resources with /img2mo-learn . Use when the user provides videos, extracted frame sequences, spritesheets, Spine assets, generated outputs, failed attempts, or reference motion folders and wants to summarize animation timing, pose beats, style…