assets-prefab-create

To create a Unity prefab from a scene GameObject, you call the MCP Plugin HTTP API with a valid prefabAssetPath starting with Assets/ and a non-null gameObjectRef to locate the target object. This saves the object as a reusable prefab at your specified project path.

To replace a scene GameObject with a newly created prefab, set the replaceGameObjectWithPrefab option to true when calling the prefab creation API. This instantly swaps the target object in your active Unity scene with the generated prefab asset.

You need a prefabAssetPath string that starts with Assets/ (e.g., Assets/Prefabs/MyObject.prefab) and a non-null gameObjectRef to identify the target object. The API requires these exact inputs to successfully create and save the prefab.

You cannot create a prefab without a gameObjectRef, but you can locate the target GameObject first. Use the gameobject-find tool to locate the target GameObject in the active scene, then pass its reference to the prefab creation API.

Prefab creation fails if the prefabAssetPath does not start with Assets/ or if the gameObjectRef is null. Ensure your target object exists in the active Unity scene and that your asset path is correctly formatted before calling the API.