assets-copy

assets-copy is a skill for Claude Code from IvanMurzak/Unity-MCP. It costs 36 tokens per session (1,041 once invoked), scanned A, original, Apache-2.0.

A Unity asset-copying tool that copies files from specified source paths to matching destination paths and refreshes Unity’s AssetDatabase afterward. AssetDatabase is Unity’s record of project assets.

In plain words
What is it for?
Use it to duplicate Unity assets into new locations, then refresh the project so the copied files are available.
Why use it?
It removes repetitive manual copying and makes Unity notice the new or changed assets after the operation. Errors are reported per file pair so one failed copy does not stop the others.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

About the project

Unity-MCP connects AI coding agents to the Unity game engine through MCP, letting them work with the Unity Editor and running games. It is used by game developers to generate code, automate development and testing, debug projects, and add AI-driven behavior to games. The catalogue entries provide skills, instructions, an MCP integration, and settings for operating this workflow.

IvanMurzak/Unity-MCP · 4,148 stars · on GitHub · ai-game.dev

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.

agentmods
npx agentmods add skills/ivanmurzak/unity-mcp/assets-copy
Any agent
npx skills add IvanMurzak/Unity-MCP --skill assets-copy
Clone the repo
git clone --depth 1 https://github.com/IvanMurzak/Unity-MCP

Made for: Claude Code.

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.

agentmods badge for assets-copy

README.md
[![agentmods](https://agentmods.dev/badge/skills/ivanmurzak/unity-mcp/assets-copy.svg)](https://agentmods.dev/skills/ivanmurzak/unity-mcp/assets-copy)
Your own site
<a href="https://agentmods.dev/skills/ivanmurzak/unity-mcp/assets-copy"><img src="https://agentmods.dev/badge/skills/ivanmurzak/unity-mcp/assets-copy.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,041 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00036 $0.01041
Opus 5 $0.00018 $0.00521
Sonnet 5 $0.00007 $0.00208
Haiku 4.5 $0.00004 $0.00104

Measured 6d ago against content hash 3b26c19fd6a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

assets-copy 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 6d 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.

Unity-MCP-Plugin/.claude/skills/assets-copy/SKILL.md · 155 lines

How it starts

The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Assets / Copy

Copy assets at given paths and store them at new paths. Does AssetDatabase.Refresh() at the end. Use 'assets-find' tool to find assets before copying.

Inputs

  • sourcePaths — paths of the assets to copy.
  • destinationPaths — paths to store the copied assets (must match sourcePaths length).

Behavior

Each source/destination pair is copied in order. Per-pair errors are accumulated in the response instead of throwing, so a single bad pair does not abort the whole batch.

How to Call

unity-mcp-cli run-tool assets-copy --input '{
  "sourcePaths": "string_value",
  "destinationPaths": "string_value"
}'

For complex input (multi-line strings, code), save the JSON to a file and use:

unity-mcp-cli run-tool assets-copy --input-file args.json

Or pipe via stdin (recommended):

unity-mcp-cli run-tool assets-copy --input-file - <<'EOF'
{"param": "value"}
EOF

Troubleshooting

If unity-mcp-cli is not found, either install it globally (npm install -g unity-mcp-cli) or use npx unity-mcp-cli instead. Read the /unity-initial-setup skill for detailed installation instructions.

Input

Name Type Required Description
sourcePaths any Yes The paths of the assets to copy.
destinationPaths any Yes The paths to store the copied assets.

Input JSON Schema

{
  "type": "object",
  "properties": {
    "sourcePaths": {
      "$ref": "#/$defs/System.String-1"
    },
    "destinationPaths": {
      "$ref": "#/$defs/System.String-1"
    }
  },
  "$defs": {
    "System.String-1": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  },
  "required": [
    "sourcePaths",
    "destinationPaths"
  ]
}

Output

Output JSON Schema

{
  "type": "object",
  "properties": {
    "result": {
      "$ref": "#/$defs/AIGD.CopyAssetsResponse"
    }
  },
  "$defs": {
    "System.Collections.Generic.List(AIGD.AssetObjectRef)": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/AIGD.AssetObjectRef",
        "description": "Reference to UnityEngine.Object asset instance. It could be Material, ScriptableObject, Prefab, and any other Asset. Anything located in the Assets and Packages folders."
      }
    },
    "AIGD.AssetObjectRef": {
      "type": "object",
      "properties": {
        "instanceID": {
          "type": "integer",
          "description": "instanceID of the UnityEngine.Object. If this is '0' and 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'."
        },
        "assetType": {
          "$ref": "#/$defs/System.Type",
          "description": "Type of the asset."
        },
        "assetPath": {
          "type": "string",
          "description": "Path to the asset within the project. Starts with 'Assets/'"
        },
        "assetGuid": {
          "type": "string",
          "description": "Unique identifier for the asset."
        }
      },
      "required": [
        "instanceID"
      ],
      "description": "Reference to UnityEngine.Object asset instance. It could be Material, ScriptableObject, Prefab, and any other Asset. Anything located in the Assets and Packages folders."
    },
    "System.Type": {
      "type": "string"
    },
    "System.Collections.Generic.List(System.String)": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "AIGD.CopyAssetsResponse": {
      "type": "object",
      "properties": {
        "CopiedAssets": {
          "$ref": "#/$defs/System.Collections.Generic.List(AIGD.AssetObjectRef)",
          "description": "List of copied assets."
        },
        "Errors": {
          "$ref": "#/$defs/System.Collections.Generic.List(System.String)",
          "description": "List of errors encountered during copy operations."
        }
      }
    }
  },
  "required": [
    "result"
  ]
}

Read the full file on GitHub · 155 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.

  1. 6d ago First seen · 155 lines · 36 tokens per session scan A 3b26c19fd6a7

Subscribe to this mod's changes

assets-copy is a skill published in the GitHub repository IvanMurzak/Unity-MCP (4,148 stars, last pushed yesterday), licensed Apache-2.0. It adds 36 tokens to every session and 1,041 once invoked, about $0.0002 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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