A Unity Engine support skill for automating the Unity Editor and game runtime with C# scripts. Unity is a tool for building 2D and 3D games and interactive applications.

Use it for Unity editor tools, runtime scripts, Addressables content pipelines, rendering setups, and command-line or continuous-integration builds.

It helps with repetitive editor work, content management, troubleshooting, and automated builds across desktop, mobile, console, and WebGL projects.

unity — Skill for Claude Code by alivirgo

Install

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.

Any agent

npx skills add alivirgo/Major-AI-Skills --skill unity

Clone the repo

git clone --depth 1 https://github.com/alivirgo/Major-AI-Skills

Made for: Claude Code.

Or install mas-3d-games, the plugin that ships this one along with the rest of its 8 skills.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/alivirgo/major-ai-skills/unity/github.svg)](https://agentmods.dev/skills/alivirgo/major-ai-skills/unity)

Your own site

<a href="https://agentmods.dev/skills/alivirgo/major-ai-skills/unity"><img src="https://agentmods.dev/badge/skills/alivirgo/major-ai-skills/unity/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/alivirgo/major-ai-skills/unity"><img src="https://agentmods.dev/badge/skills/alivirgo/major-ai-skills/unity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,400 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00022	$0.01400
Opus 5	$0.00011	$0.00700
Sonnet 5	$0.00004	$0.00280
Haiku 4.5	$0.00002	$0.00140

Measured today against content hash 8addf5e22450, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

unity 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.

plugins/mas-3d-games/skills/unity/SKILL.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Unity Engine C# Editor & Runtime AI Skill Guide (Claude)

Overview & Engine Architecture

Unity is a component-driven real-time engine with a C# scripting layer (Mono / IL2CPP), an Editor extensibility surface (UnityEditor namespace), and player runtimes for desktop, mobile, console, and WebGL. Projects are organized as Scenes + Prefabs + ScriptableObjects, with rendering via Built-in, URP, or HDRP. Claude operates as a Principal Unity Engineer, specializing in Editor scripts and custom windows, deterministic play-mode tooling, Addressables content pipelines, and -batchmode -quit -executeMethod CI builds.

Unity Editor / Player Architecture

┌─────────────────────────────────────────────────────────────┐
│                 Unity Engine Architecture                   │
│                                                             │
│  Authoring (Editor)                                         │
│  ├── UnityEditor APIs (MenuItem, EditorWindow, AssetDatabase│
│  ├── Importers, BuildPipeline, ScriptableBuildPipeline      │
│  └── Domain Reload / Enter Play Mode Options                │
│                                                             │
│  Runtime (Player)                                           │
│  ├── GameObject + MonoBehaviour / ScriptableObject          │
│  ├── SceneManager, Physics, Animation, UI Toolkit/uGUI      │
│  └── URP/HDRP Render Pipeline Asset                         │
│                                                             │
│  Content & CI                                               │
│  ├── Addressables / AssetBundles                            │
│  ├── Unity -batchmode -projectPath -executeMethod           │
│  └── IL2CPP / Mono scripting backends                       │
└─────────────────────────────────────────────────────────────┘

Operational Capabilities & Agent Directives

Editor vs Runtime Separation: Put Editor-only code under #if UNITY_EDITOR or in an Editor/ assembly; never ship UnityEditor references to players.
AssetDatabase Hygiene: After creating assets in Editor scripts, call AssetDatabase.CreateAsset, SaveAssets, and Refresh in the correct order.
Build Automation: Expose static methods for -executeMethod that set BuildPlayerOptions and return non-zero on failure via EditorApplication.Exit(code).
Play Mode Safety: Avoid expensive FindObjectOfType loops; prefer serialized references, dependency injection, or Addressables keys.
Pipeline Awareness: Detect URP/HDRP via installed packages before recommending shader/material APIs.

Read the full file on GitHub · 146 lines

Changes

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 Changed · -12 tokens per session 8addf5e22450
12d ago First seen · 146 lines · 34 tokens per session scan A 8d8e337fe631

Subscribe to this mod's changes

unity is a skill published in the GitHub repository alivirgo/Major-AI-Skills (1 stars, last pushed today), licensed MIT. It adds 22 tokens to every session and 1,400 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 2026-08-31.

C# and .NET Game development addressables agent-skills agentic-skills ai-agent-skills ai-agents batchmode claude editor-scripting game-engines unity urp

unity

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Nothing flagged

How it starts

Unity Engine C# Editor & Runtime AI Skill Guide (Claude)

Overview & Engine Architecture

Unity Editor / Player Architecture

Operational Capabilities & Agent Directives

What this file has done since we first saw it

Other skills, from other repositories

reflection-method-call

script-execute

reflection-method-find

unity-version-split

script-delete

script-read