Modify GameObject fields and properties in opened Prefab or in a Scene. You can modify multiple GameObjects at once. Just provide the same number of GameObject references and SerializedMember objects. Three modification surfaces are available per GameObject (gameObjectDiffs, pathPatchesPerGameObject, jsonPatchesPerGameObject) — see the skill body for details.
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Modify GameObject fields and properties in opened Prefab or in a Scene. You can modify multiple GameObjects at once. Just provide the same number of GameObject references and SerializedMember objects. Three modification surfaces are available per GameObject (gameObjectDiffs, pathPatchesPerGameObject, jsonPatchesPerGameObject) — see the skill body for details.
GameObject / Modify
Three modification surfaces
Per GameObject — parallel arrays must have the same length as gameObjectRefs:
gameObjectDiffs — full SerializedMember diff per GameObject (legacy, backwards compatible).
pathPatchesPerGameObject — list of {path, value} patches per GameObject routed through Reflector.TryModifyAt; atomic per-path modification.
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.
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.
gameObjectDiffs
any
No
Optional. Each item in the array represents a GameObject modification of the 'gameObjectRefs' at the same index. Usually a GameObject is a container for components. Each component may have fields and properties for modification. If you need to modify components of a GameObject, please use 'gameobject-component-modify' tool. Ignore values that should not be modified. Any unknown or wrong located fields and properties will be ignored. Check the result of this command to see what was changed. The ignored fields and properties will be listed.
pathPatchesPerGameObject
any
No
Optional. Per-GameObject list of path-scoped patches routed through Reflector.TryModifyAt. Outer index aligns with 'gameObjectRefs'; inner list contains {path, value} entries. Pass null or omit for GameObjects that should not receive path patches.
jsonPatchesPerGameObject
any
No
Optional. Per-GameObject JSON Merge Patch (RFC 7396, extended with [i]/[key] keys) routed through Reflector.TryPatch. Outer index aligns with 'gameObjectRefs'. Pass null or omit for GameObjects that should not receive a JSON patch.
"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."
"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."
"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."
"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."
