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/performancenpx skills add Besty0728/Unity-Skills --skill performancegit 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 | $0.00010 | $0.00963 |
| Opus 5 | $0.00005 | $0.00481 |
| Sonnet 5 | $0.00002 | $0.00193 |
| Haiku 4.5 | $0.00001 | $0.00096 |
Grade A, and why
unity-performance 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 2d 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 — 77 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
- Reviewing performance
- Diagnosing frame drops
- Reducing allocations
- Planning pooling/optimization
- 做性能审查、诊断掉帧或卡顿、减少内存分配、规划对象池/优化
Unity Performance Red Flags
Use this skill for a high-signal review of likely Unity performance issues. Focus on red flags, not speculative micro-optimizations.
Check For
- Too many unrelated
Update/LateUpdate/FixedUpdateloops - Repeated
Find,GetComponent,Camera.main, or tag lookups in hot paths - Frequent
Instantiate/Destroysuitable for pooling - Avoidable per-frame allocations:
- LINQ
- string formatting
- closures
- boxing
- Reflection in runtime hot paths
- Expensive editor-only helpers leaking into runtime code
- Physics, animation, or UI updates happening at the wrong cadence
Hidden Costs: Possibility ≠ Actuality
Three counter-intuitive traps where what seems "free" is actually expensive. Each cost is paid for possibility of work, not for work actually performed — which is why profilers rarely catch them directly.
Write permission costs, even without writing
A component whose Update can mutate transform.position pays the cost whether the branch runs or not: dirty-flag and serialization systems treat write permission as a reason to poll every frame. Similarly, a [SerializeField] field that is never modified at runtime still sits on the serialization path. The fix is to remove the permission, not tighten the branch — split the rarely-needed writer into its own component and AddComponent only when needed. Source: NetcodeSamples/HelloNetcode/2_Intermediate/07_Optimization/Optimization.md — "a system with the possibility of writing to a component, regardless of whether it writes to it or not, will always have to be serialized".
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.
- 2d ago First seen · 77 lines · 10 tokens per session scan A 305286cc9c44
unity-performance is a skill published in the GitHub repository Besty0728/Unity-Skills (1,695 stars, last pushed today), licensed MIT. It adds 10 tokens to every session and 963 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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