Gameobject Modify

GameObject / Modify

Three modification surfaces

Per GameObject — parallel arrays must have the same length as gameObjectRefs:

1. gameObjectDiffs — full SerializedMember diff per GameObject (legacy, backwards compatible).
2. pathPatchesPerGameObject — list of {path, value} patches per GameObject routed through Reflector.TryModifyAt; atomic per-path modification.
3. jsonPatchesPerGameObject — JSON Merge Patch per GameObject routed through Reflector.TryPatch.

When more than one is supplied for the same GameObject they run in this order: jsonPatch → pathPatches → diff. At least one of the three is required.

Path syntax

fieldName, nested/field, arrayField/[i], dictField/[key].

How to Call

unity-mcp-cli run-tool gameobject-modify --input '{
  "gameObjectRefs": "string_value",
  "gameObjectDiffs": "string_value",
  "pathPatchesPerGameObject": "string_value",
  "jsonPatchesPerGameObject": "string_value"
}'

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

unity-mcp-cli run-tool gameobject-modify --input-file args.json

Or pipe via stdin (recommended):

unity-mcp-cli run-tool gameobject-modify --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

Input JSON Schema

{
  "type": "object",
  "properties": {
    "gameObjectRefs": {
      "$ref": "#/$defs/AIGD.GameObjectRefList"
    },
    "gameObjectDiffs": {
      "$ref": "#/$defs/com.IvanMurzak.ReflectorNet.Model.SerializedMemberList"
    },
    "pathPatchesPerGameObject": {
      "$ref": "#/$defs/System.Collections.Generic.List(System.Collections.Generic.List(AIGD.PathPatch))"
    },
    "jsonPatchesPerGameObject": {
      "$ref": "#/$defs/System.Collections.Generic.List(System.String)"
    }
  },
  "$defs": {
    "AIGD.GameObjectRef": {
      "type": "object",
      "properties": {
        "instanceID": {
          "type": "integer",
          "description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)"
        },
        "path": {
          "type": "string",
          "description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2."
        },
        "name": {
          "type": "string",
          "description": "Name of a GameObject in hierarchy. Priority: 3."
        },
        "assetType": {
          "$ref": "#/$defs/System.Type",
          "description": "Type of the asset."
        },
        "assetPath": {
          "type": "string",
          "description": "Path to the asset within the project. Starts with 'Assets/'"
        },
        "assetGuid": {
          "type": "string",
          "description": "Unique identifier for the asset."
        }
      },
      "required": [
        "instanceID"
      ],
      "description": "Find GameObject in opened Prefab or in the active Scene."
    },
    "System.Type": {
      "type": "string"
    },
    "AIGD.GameObjectRefList": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/AIGD.GameObjectRef",
        "description": "Find GameObject in opened Prefab or in the active Scene."
      },
      "description": "Array of GameObjects in opened Prefab or in the active Scene."
    },
    "com.IvanMurzak.ReflectorNet.Model.SerializedMemberList": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/com.IvanMurzak.ReflectorNet.Model.SerializedMember"
      }
    },
    "com.IvanMurzak.ReflectorNet.Model.SerializedMember": {
      "type": "object",
      "properties": {
        "typeName": {
          "type": "string",
          "description": "Full type name. Eg: 'System.String', 'System.Int32', 'UnityEngine.Vector3', etc."
        },
        "name": {
          "type": "string",
          "description": "Object name."
        },
        "value": {
          "description": "Value of the object, serialized as a non stringified JSON element. Can be null if the value is not set. Can be default value if the value is an empty object or array json."
        },
        "fields": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/com.IvanMurzak.ReflectorNet.Model.SerializedMember",
            "description": "Nested field value."
          },
          "description": "Fields of the object, serialized as a list of 'SerializedMember'."
        },
        "props": {
          "type": "array",
          "items": {
            "$ref": "#/$defs/com.IvanMurzak.ReflectorNet.Model.SerializedMember",
            "description": "Nested property value."
          },
          "description": "Properties of the object, serialized as a list of 'SerializedMember'."
        }
      },
      "required": [
        "typeName"
      ],
      "additionalProperties": false
    },
    "System.Collections.Generic.List(AIGD.PathPatch)": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/AIGD.PathPatch"
      }
    },
    "AIGD.PathPatch": {
      "type": "object",
      "properties": {
        "Path": {
          "type": "string",
          "description": "Slash-delimited path to the target field/element/entry. Plain segment navigates a field or property (e.g. 'admin' or 'admin/name'). Use '[i]' for array/list index (e.g. 'planets/[0]/orbitRadius'). Use '[key]' for dictionary entry (e.g. 'config/[timeout]'). A leading '#/' is stripped automatically. Required."
        },
        "Value": {
          "$ref": "#/$defs/com.IvanMurzak.ReflectorNet.Model.SerializedMember",
          "description": "The new value to write at the path. Use the standard SerializedMember envelope: 'typeName' + 'value' for primitives, or nested 'fields'/'props' for complex types. Required — omitting it overwrites the target with a default empty SerializedMember."
        }
      }
    },
    "System.Collections.Generic.List(System.Collections.Generic.List(AIGD.PathPatch))": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/System.Collections.Generic.List(AIGD.PathPatch)"
      }
    },
    "System.Collections.Generic.List(System.String)": {
      "type": "array",
      "items": {
        "type": "string"
      }
    }
  },
  "required": [
    "gameObjectRefs"
  ]
}

Output

Output JSON Schema

{
  "type": "object",
  "properties": {
    "result": {
      "$ref": "#/$defs/com.IvanMurzak.ReflectorNet.Model.Logs"
    }
  },
  "$defs": {
    "com.IvanMurzak.ReflectorNet.Model.LogEntry": {
      "type": "object",
      "properties": {
        "Depth": {
          "type": "integer"
        },
        "Message": {
          "type": "string"
        },
        "Type": {
          "type": "string",
          "enum": [
            "Trace",
            "Debug",
            "Info",
            "Success",
            "Warning",
            "Error",
            "Critical"
          ]
        }
      },
      "required": [
        "Depth",
        "Type"
      ]
    },
    "com.IvanMurzak.ReflectorNet.Model.Logs": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/com.IvanMurzak.ReflectorNet.Model.LogEntry"
      }
    }
  },
  "required": [
    "result"
  ]
}