Agent skill

gameobject-component-add

Add Component to GameObject in opened Prefab or in a Scene. Use 'gameobject-find' tool to find the target GameObject first. Use 'gameobject-component-list-all' tool to find the component type names to add.

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/gameobject-component-add

SKILL.md

GameObject / Component / Add

How to Call

bash
unity-mcp-cli run-tool gameobject-component-add --input '{
  "componentNames": "string_value",
  "gameObjectRef": "string_value"
}'

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

bash
unity-mcp-cli run-tool gameobject-component-add --input-file args.json

Or pipe via stdin (recommended):

bash
unity-mcp-cli run-tool gameobject-component-add --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
componentNames any Yes Full name of the Component. It should include full namespace path and the class name.
gameObjectRef any Yes Find GameObject in opened Prefab or in the active Scene.

Input JSON Schema

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

Output

Output JSON Schema

json
{
  "type": "object",
  "properties": {
    "result": {
      "$ref": "#/$defs/com.IvanMurzak.Unity.MCP.Editor.API.Tool_GameObject+AddComponentResponse"
    }
  },
  "$defs": {
    "System.Collections.Generic.List<com.IvanMurzak.Unity.MCP.Runtime.Data.ComponentDataShallow>": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/com.IvanMurzak.Unity.MCP.Runtime.Data.ComponentDataShallow"
      }
    },
    "com.IvanMurzak.Unity.MCP.Runtime.Data.ComponentDataShallow": {
      "type": "object",
      "properties": {
        "instanceID": {
          "type": "integer"
        },
        "typeName": {
          "type": "string"
        },
        "isEnabled": {
          "type": "string",
          "enum": [
            "False",
            "True",
            "NA"
          ]
        }
      },
      "required": [
        "instanceID",
        "isEnabled"
      ]
    },
    "System.Collections.Generic.List<System.String>": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "com.IvanMurzak.Unity.MCP.Editor.API.Tool_GameObject+AddComponentResponse": {
      "type": "object",
      "properties": {
        "AddedComponents": {
          "$ref": "#/$defs/System.Collections.Generic.List<com.IvanMurzak.Unity.MCP.Runtime.Data.ComponentDataShallow>",
          "description": "List of successfully added components."
        },
        "Messages": {
          "$ref": "#/$defs/System.Collections.Generic.List<System.String>",
          "description": "List of success messages for added components."
        },
        "Warnings": {
          "$ref": "#/$defs/System.Collections.Generic.List<System.String>",
          "description": "List of warnings encountered during component addition."
        },
        "Errors": {
          "$ref": "#/$defs/System.Collections.Generic.List<System.String>",
          "description": "List of errors encountered during component addition."
        }
      }
    }
  },
  "required": [
    "result"
  ]
}

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