Agent skill

assets-prefab-instantiate

Instantiates prefab in the current active scene. Use 'assets-find' tool to find prefab assets in the project.

View SKILL.md on GitHub Repository
Stars 2,087
Forks 190

Install this agent skill to your Project

npx add-skill https://github.com/IvanMurzak/Unity-MCP/tree/main/Unity-MCP-Plugin/.claude/skills/assets-prefab-instantiate

SKILL.md

Assets / Prefab / Instantiate

How to Call

bash
unity-mcp-cli run-tool assets-prefab-instantiate --input '{
  "prefabAssetPath": "string_value",
  "gameObjectPath": "string_value",
  "position": "string_value",
  "rotation": "string_value",
  "scale": "string_value",
  "isLocalSpace": false
}'

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

bash
unity-mcp-cli run-tool assets-prefab-instantiate --input-file args.json

Or pipe via stdin (recommended):

bash
unity-mcp-cli run-tool assets-prefab-instantiate --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
prefabAssetPath string Yes Prefab asset path.
gameObjectPath string Yes GameObject path in the current active scene.
position any No Transform position of the GameObject.
rotation any No Transform rotation of the GameObject. Euler angles in degrees.
scale any No Transform scale of the GameObject.
isLocalSpace boolean No World or Local space of transform.

Input JSON Schema

json
{
  "type": "object",
  "properties": {
    "prefabAssetPath": {
      "type": "string"
    },
    "gameObjectPath": {
      "type": "string"
    },
    "position": {
      "$ref": "#/$defs/UnityEngine.Vector3"
    },
    "rotation": {
      "$ref": "#/$defs/UnityEngine.Vector3"
    },
    "scale": {
      "$ref": "#/$defs/UnityEngine.Vector3"
    },
    "isLocalSpace": {
      "type": "boolean"
    }
  },
  "$defs": {
    "UnityEngine.Vector3": {
      "type": "object",
      "properties": {
        "x": {
          "type": "number"
        },
        "y": {
          "type": "number"
        },
        "z": {
          "type": "number"
        }
      },
      "required": [
        "x",
        "y",
        "z"
      ],
      "additionalProperties": false
    }
  },
  "required": [
    "prefabAssetPath",
    "gameObjectPath"
  ]
}

Output

Output JSON Schema

json
{
  "type": "object",
  "properties": {
    "result": {
      "$ref": "#/$defs/com.IvanMurzak.Unity.MCP.Runtime.Data.GameObjectRef",
      "description": "Find GameObject in opened Prefab or in the active Scene."
    }
  },
  "$defs": {
    "System.Type": {
      "type": "string"
    },
    "com.IvanMurzak.Unity.MCP.Runtime.Data.GameObjectRef": {
      "type": "object",
      "properties": {
        "instanceID": {
          "type": "integer",
          "description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)"
        },
        "path": {
          "type": "string",
          "description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2."
        },
        "name": {
          "type": "string",
          "description": "Name of a GameObject in hierarchy. Priority: 3."
        },
        "assetType": {
          "$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": "Find GameObject in opened Prefab or in the active Scene."
    }
  },
  "required": [
    "result"
  ]
}

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