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 agentmods add skills/besty0728/unity-skills/asmdefnpx skills add Besty0728/Unity-Skills --skill asmdefgit 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/asmdef)<a href="https://agentmods.dev/skills/besty0728/unity-skills/asmdef"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/asmdef.svg" alt="Measured on agentmods" 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 | $0.00015 | $0.00357 |
| Opus 5 | $0.00008 | $0.00179 |
| Sonnet 5 | $0.00003 | $0.00071 |
| Haiku 4.5 | $0.00002 | $0.00036 |
Grade A, and why
unity-asmdef 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 5d 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.
What it actually says
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
- Planning asmdef layout
- Untangling assembly dependencies
- Speeding up compilation
- Splitting editor/runtime/test code
- 规划 asmdef 结构、理顺程序集依赖、加速编译、拆分编辑器/运行时代码
Unity asmdef Advisor
Use this skill when the project is large enough that compile boundaries and dependency direction matter.
Recommend Only When Worth It
asmdef is usually worth discussing when:
- the project has multiple domains/systems
- editor code and runtime code are mixed
- compile times are becoming noticeable
- tests should be isolated cleanly
Output Format
- Whether
asmdefis justified now - Proposed assemblies
- Allowed dependency direction
- Editor/runtime/test split
- Migration steps
- Risks or churn to avoid
Default Guidance
- Prefer a few meaningful assemblies over many tiny ones.
- Split editor code from runtime first.
- Keep the dependency graph directional and shallow.
Guardrails
Mode: Documentation only — no REST skills to gate; load freely under any operating mode (Approval / Auto / Bypass).
- Do not introduce
asmdeffragmentation for a tiny prototype. - Do not create circular dependencies or force everything through a shared dumping-ground assembly.
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.
- 5d ago First seen · 49 lines · 15 tokens per session scan A 9b28d9e4054b
unity-asmdef is a skill published in the GitHub repository Besty0728/Unity-Skills (1,707 stars, last pushed today), licensed MIT. It adds 15 tokens to every session and 357 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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