assets-prefab-instantiate

Instantiate a prefab into the currently active scene at an optional position/rotation/scale, parented under an optional scene GameObject path. Use 'assets-find' to locate the prefab asset first.

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Assets / Prefab / Instantiate

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

Inputs

prefabAssetPath — project asset path of the prefab to instantiate.
gameObjectPath — destination path in the scene; the last segment becomes the new GameObject's name, any prefix is looked up as the parent (must already exist).
position / rotation / scale — optional transform; default to zero / zero / one.
isLocalSpace — when true, applies the transform in local space relative to the parent.

How to Call

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:
unity-mcp-cli run-tool assets-prefab-instantiate --input-file args.json
Or pipe via stdin (recommended):
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

{
  "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

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

Repository: IvanMurzak/Unity-MCP
Path: Unity-MCP-Plugin/.claude/skills/assets-prefab-instantiate/SKILL.md
Commit: e0a24ef

Last updated: about 11 hours ago
First committed: 2 months ago

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