Godot MCP

Instructions

Implementation Reference

• src/godot_mcp/godot.py:1652-1716 (handler)

  Implementation of the update_node_transform tool in GodotController.

  def update_node_transform(
      self,
      project_path: str,
      scene_path: str,
      transform: dict[str, Any],
      node_path: str = ".",
      godot_executable: str | None = None,
  ) -> dict[str, Any]:
      project_dir = ensure_project_path(project_path)
      executable, version = resolve_godot_executable(godot_executable)
      absolute_scene_path, resource_scene_path = resolve_scene_path(project_dir, scene_path)
  
      if not absolute_scene_path.exists():
          raise GodotError(f"Scene not found: {absolute_scene_path}")
      if not isinstance(transform, dict):
          raise GodotError("`transform` must be an object.")
      if not transform:
          raise GodotError("`transform` must contain at least one field to update.")
  
      normalized_node_path = normalize_scene_node_path(node_path)
      try:
          with tempfile.NamedTemporaryFile(
              mode="w",
              encoding="utf-8",
              suffix="-godot-node-transform.json",
              delete=False,
          ) as handle:
              json.dump(transform, handle, ensure_ascii=False)
              updates_path = handle.name
      except TypeError as exc:
          raise GodotError("`transform` contains a value that could not be serialized to JSON.") from exc
  
      try:
          output = _run_godot_script(
              executable=executable,
              project_dir=project_dir,
              script_name="update_node_transform.gd",
              user_args=[
                  "--scene-path",
                  resource_scene_path,
                  "--node-path",
                  normalized_node_path,
                  "--updates-path",
                  updates_path,
              ],
          )
      finally:
          Path(updates_path).unlink(missing_ok=True)
  
      parsed = _parse_script_json_output(output, "update_node_transform.gd")
  
      return {
          "project_path": str(project_dir),
          "scene_path": str(absolute_scene_path),
          "scene_resource_path": resource_scene_path,
          "node_path": parsed.get("node_path", normalized_node_path),
          "node_name": parsed.get("node_name"),
          "node_type": parsed.get("node_type"),
          "transform_kind": parsed.get("transform_kind"),
          "supported_fields": parsed.get("supported_fields", []),
          "updated_fields": parsed.get("updated_fields", []),
          "transform": parsed.get("transform", {}),
          "godot_executable": str(executable),
          "godot_version": version,
      }

• src/godot_mcp/server.py:767-804 (registration)

  Registration of the godot_update_node_transform tool definition in the server.

      name="godot_update_node_transform",
      description="Update the transform section of a specific node in a saved scene. Currently supports Node2D, Node3D, and Control nodes.",
      input_schema={
          "type": "object",
          "properties": {
              "project_path": {
                  "type": "string",
                  "description": "Path to the Godot project directory or its project.godot file.",
              },
              "scene_path": {
                  "type": "string",
                  "description": "Path to the target .tscn file. Absolute, relative, and res:// paths are supported.",
              },
              "node_path": {
                  "type": "string",
                  "description": "Scene-relative node path to update. Use '.' for the root node.",
                  "default": ".",
              },
              "transform": {
                  "type": "object",
                  "description": "Transform fields to update. Vector values can be passed as objects like {x, y} or {x, y, z}.",
              },
              "godot_executable": {
                  "type": "string",
                  "description": "Optional explicit path to the Godot executable or .app bundle.",
              },
          },
          "required": ["project_path", "scene_path", "transform"],
          "additionalProperties": False,
      },
      handler=lambda args: self.controller.update_node_transform(
          project_path=args["project_path"],
          scene_path=args["scene_path"],
          node_path=args.get("node_path", "."),
          transform=args["transform"],
          godot_executable=args.get("godot_executable"),
      ),
  ),