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 primetween-designgit 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/primetween-design)<a href="https://agentmods.dev/skills/besty0728/unity-skills/primetween-design"><img src="https://agentmods.dev/badge/skills/besty0728/unity-skills/primetween-design.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 5.1 | $0.00021 | $0.01037 |
| Opus 5 | $0.00010 | $0.00518 |
| Sonnet 5 | $0.00004 | $0.00207 |
| Haiku 4.5 | $0.00002 | $0.00104 |
Grade A, and why
unity-primetween-design 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 7d 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 — 52 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 or reviewing PrimeTween code
- Diagnosing tween lifecycle behavior
- 编写或审查 PrimeTween 代码、诊断补间生命周期行为
PrimeTween - Design Rules
Advisory module. Rules are grounded in the PrimeTween 1.4.6 package installed through com.kyrylokuzyk.primetween.
Mode: Documentation only — no REST skills to gate; load freely under any operating mode.
When to Load This Module
Load before writing or reviewing:
Tween.Position,LocalPosition,EulerAngles,LocalEulerAngles,Scale,Alpha,Color,Custom, delay, or shake calls.Sequence.Create,Chain,Group,Insert, callbacks, or sequence cycles.Tween.Stop,Complete,StopAll,CompleteAll,PausedAll, progress, time scale, or manual update control.OnComplete,OnUpdate, zero-allocation callback overloads, or target-destruction handling.await tween,ToYieldInstruction, serializedTweenSettings,PrimeTweenConfig, or capacity tuning.
Critical Rule Summary
| # | Rule | Source anchor |
|---|---|---|
| 1 | PrimeTween uses static Tween factories. Its Tween handle is a struct, and a completed or stopped handle is dead and non-reusable; create a new tween to replay or reverse an animation. |
Runtime/Tween.cs:53,256-264; readme.md “Controlling tweens” |
| 2 | Use Sequence.Chain for sequential work, Group for parallel work against the previous item, and Insert for absolute-time overlap. This naming differs from DOTween’s Append/Join vocabulary. |
Runtime/Sequence.cs:154,193,202 |
| 3 | A Sequence has its own cycles, cycle mode, easing, update type, and unscaled-time settings at creation. Configure those on Sequence.Create, not through DOTween-style fluent setters. |
Runtime/Sequence.cs:108 |
| 4 | Callbacks can bind a target explicitly with OnComplete<T> or sequence callback overloads. That avoids a capturing closure and lets PrimeTween suppress the callback if its target is destroyed. |
Runtime/Tween.cs:365-382; Runtime/Sequence.cs:228-281 |
| 5 | PrimeTween detects destroyed Unity targets and exposes targeted warnings through PrimeTweenConfig. Do not assume a DOTween SetLink API exists; own a handle and stop it when your component is disabled when that is the intended lifecycle. |
Runtime/Internal/PrimeTweenManager.cs:870-880; Runtime/PrimeTweenConfig.cs:56-87 |
| 6 | await tween and ToYieldInstruction() are supported, but both async state machines and coroutines allocate. For allocation-sensitive animation flows, prefer Sequence. |
Runtime/Internal/AsyncAwaitSupport.cs; Runtime/Internal/CoroutinesSupport.cs; readme.md “Async/await” |
| 7 | TweenSettings and TweenSettings<T> are serializable configuration carriers for Inspector-authored tween values; use them instead of inventing a separate animation settings component. |
Runtime/TweenSettings.cs:25-54; readme.md “Inspector integration” |
| 8 | PrimeTweenConfig is static runtime configuration. It has capacity, default ease/update type, warning controls, and manual-update APIs, but it is not a Resources settings asset. |
Runtime/PrimeTweenConfig.cs:25-101 |
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.
- 7d ago First seen · 52 lines · 21 tokens per session scan A a4385dc178c7
unity-primetween-design is a skill published in the GitHub repository Besty0728/Unity-Skills (1,711 stars, last pushed yesterday), licensed MIT. It adds 21 tokens to every session and 1,037 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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