Unity MCP Server

using System.Collections.Generic; using Newtonsoft.Json; using Newtonsoft.Json.Linq; using UnityEditor; using UnityEngine; namespace UnityMcp { public static class Tools_Selection { public static ToolResult Get(JObject args) { var selected = Selection.gameObjects; var list = new List<object>(); foreach (var go in selected) { if (go == null) continue; list.Add(new { instanceId = go.GetInstanceID(), name = go.name, path = GameObjectResolver.GetQualifiedPath(go) }); } var result = new { count = list.Count, activeObject = Selection.activeGameObject != null ? new { instanceId = Selection.activeGameObject.GetInstanceID(), name = Selection.activeGameObject.name, path = GameObjectResolver.GetQualifiedPath(Selection.activeGameObject) } : null, objects = list }; return ToolResultUtil.Text(JsonConvert.SerializeObject(result, Formatting.Indented)); } public static ToolResult Set(JObject args) { var targets = args["targets"] as JArray; if (targets == null || targets.Count == 0) { Selection.activeGameObject = null; return ToolResultUtil.Text("Selection cleared."); } var gos = new List<GameObject>(); var errors = new List<string>(); foreach (var tok in targets) { var id = tok.Value<string>(); if (GameObjectResolver.TryResolve(id, out var go, out var err)) { gos.Add(go); } else { errors.Add($"{id}: {err}"); } } Selection.objects = gos.ToArray(); if (errors.Count > 0) { return ToolResultUtil.Text($"Selected {gos.Count} object(s). Errors: {string.Join("; ", errors)}"); } return ToolResultUtil.Text($"Selected {gos.Count} object(s)."); } public static ToolResult Focus(JObject args) { var id = args.Value<string>("target"); if (string.IsNullOrEmpty(id)) { // Focus on current selection if (Selection.activeGameObject != null) { SceneView.lastActiveSceneView?.FrameSelected(); return ToolResultUtil.Text("Focused on current selection."); } return ToolResultUtil.Text("No selection to focus on.", true); } if (!GameObjectResolver.TryResolve(id, out var go, out var err)) { return ToolResultUtil.Text(err, true); } Selection.activeGameObject = go; SceneView.lastActiveSceneView?.FrameSelected(); return ToolResultUtil.Text($"Focused on: {GameObjectResolver.GetQualifiedPath(go)}"); } } }