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2026-06-30 22:12:46 +08:00

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---
name: gameobject-duplicate
description: Duplicate a batch of GameObjects in the currently opened Prefab or active Scene. Marks each affected scene as dirty after duplication. Use 'gameobject-find' to locate the source GameObjects first.
---
# GameObject / Duplicate
Duplicate GameObjects in opened Prefab or in a Scene. Use 'gameobject-find' tool to find the target GameObjects first.
## Inputs
- `gameObjectRefs``GameObjectRefList` of source GameObjects.
## Behavior
Resolves every input ref on the main thread (throwing on any unresolved entry to keep the batch atomic). Sets `Selection.entityIds`/`instanceIDs` to the sources and invokes `Unsupported.DuplicateGameObjectsUsingPasteboard()` (Unity's canonical duplicate routine). Marks every distinct affected scene dirty so the duplicated objects are saved with the scene. Returns refs to the sources (the duplicates are reachable via the post-call `Selection`).
## How to Call
```bash
unity-mcp-cli run-tool gameobject-duplicate --input '{
"gameObjectRefs": "string_value"
}'
```
> For complex input (multi-line strings, code), save the JSON to a file and use:
> ```bash
> unity-mcp-cli run-tool gameobject-duplicate --input-file args.json
> ```
>
> Or pipe via stdin (recommended):
> ```bash
> unity-mcp-cli run-tool gameobject-duplicate --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 |
|------|------|----------|-------------|
| `gameObjectRefs` | `any` | Yes | Array of GameObjects in opened Prefab or in the active Scene. |
### Input JSON Schema
```json
{
"type": "object",
"properties": {
"gameObjectRefs": {
"$ref": "#/$defs/AIGD.GameObjectRefList"
}
},
"$defs": {
"AIGD.GameObjectRef": {
"type": "object",
"properties": {
"instanceID": {
"type": "integer",
"description": "instanceID of the UnityEngine.Object. If it is '0' and 'path', 'name', 'assetPath' and 'assetGuid' is not provided, empty or null, then it will be used as 'null'. Priority: 1 (Recommended)"
},
"path": {
"type": "string",
"description": "Path of a GameObject in the hierarchy Sample 'character/hand/finger/particle'. Priority: 2."
},
"name": {
"type": "string",
"description": "Name of a GameObject in hierarchy. Priority: 3."
},
"assetType": {
"$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": "#/$defs/AIGD.GameObjectRef",
"description": "Find GameObject in opened Prefab or in the active Scene."
},
"description": "Array of GameObjects in opened Prefab or in the active Scene."
}
},
"required": [
"gameObjectRefs"
]
}
```
## Output
### Output JSON Schema
```json
{
"type": "object",
"properties": {
"result": {
"$ref": "#/$defs/System.Collections.Generic.List(AIGD.GameObjectRef)"
}
},
"$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"
},
"System.Collections.Generic.List(AIGD.GameObjectRef)": {
"type": "array",
"items": {
"$ref": "#/$defs/AIGD.GameObjectRef",
"description": "Find GameObject in opened Prefab or in the active Scene."
}
}
},
"required": [
"result"
]
}
```