diff --git a/My project/Assets/FlowScope/Runtime/UI/IUIPreloadService.cs b/My project/Assets/FlowScope/Runtime/UI/IUIPreloadService.cs
index af4f3eb..d605ce2 100644
--- a/My project/Assets/FlowScope/Runtime/UI/IUIPreloadService.cs	
+++ b/My project/Assets/FlowScope/Runtime/UI/IUIPreloadService.cs	
@@ -1,5 +1,7 @@
 using System.Threading;
 using System.Threading.Tasks;
+using FlowScope.Resources;
+using UnityEngine;
 
 namespace FlowScope.UI
 {
@@ -7,6 +9,7 @@ namespace FlowScope.UI
     {
         Task PreloadAsync<TPanel>(CancellationToken cancellationToken);
         bool IsPreloaded<TPanel>();
+        bool TryGetPreloadedHandle<TPanel>(out IResourceHandle<GameObject> handle);
         void Release<TPanel>();
         void ReleaseAll();
     }
diff --git a/My project/Assets/FlowScope/Runtime/UI/UIManager.cs b/My project/Assets/FlowScope/Runtime/UI/UIManager.cs
index 27d9c5b..db71f29 100644
--- a/My project/Assets/FlowScope/Runtime/UI/UIManager.cs	
+++ b/My project/Assets/FlowScope/Runtime/UI/UIManager.cs	
@@ -10,11 +10,13 @@ namespace FlowScope.UI
     public sealed class UIManager
     {
         private readonly IResourceService _resources;
+        private readonly IUIPreloadService _preloadService;
         private readonly Dictionary<string, UILayer> _layers = new();
 
-        public UIManager(IResourceService resources)
+        public UIManager(IResourceService resources, IUIPreloadService preloadService = null)
         {
             _resources = resources ?? throw new ArgumentNullException(nameof(resources));
+            _preloadService = preloadService;
         }
 
         public void RegisterLayer(
@@ -58,7 +60,7 @@ namespace FlowScope.UI
             }
 
             var path = ResolvePath(typeof(TPanel), attribute);
-            var handle = await _resources.LoadAsync<GameObject>(path, cancellationToken);
+            var handle = await LoadPanelHandleAsync<TPanel>(path, cancellationToken);
             if (handle == null || handle.Asset == null)
             {
                 handle?.Dispose();
@@ -66,6 +68,7 @@ namespace FlowScope.UI
             }
 
             GameObject instance = null;
+            var ownsHandle = !IsPreloadedHandle<TPanel>(handle);
             try
             {
                 instance = UnityEngine.Object.Instantiate(handle.Asset, layer.Canvas.transform, false);
@@ -79,7 +82,8 @@ namespace FlowScope.UI
                 panel.Bind(viewModel);
                 instance.SetActive(true);
 
-                var record = new UIPanelRecord(typeof(TPanel), layer.Name, panel, handle, strategy);
+                var recordHandle = ownsHandle ? (IDisposable)handle : RetainedPanelHandle.Instance;
+                var record = new UIPanelRecord(typeof(TPanel), layer.Name, panel, recordHandle, strategy);
                 if (strategy == PanelStrategy.Cache)
                 {
                     layer.Cache(record);
@@ -95,7 +99,11 @@ namespace FlowScope.UI
                     UnityEngine.Object.Destroy(instance);
                 }
 
-                handle.Dispose();
+                if (ownsHandle)
+                {
+                    handle.Dispose();
+                }
+
                 throw;
             }
         }
@@ -188,7 +196,27 @@ namespace FlowScope.UI
             record.Handle.Dispose();
         }
 
-        private static UIPanelAttribute GetPanelAttribute(Type panelType)
+        private async Task<IResourceHandle<GameObject>> LoadPanelHandleAsync<TPanel>(
+            string path,
+            CancellationToken cancellationToken)
+        {
+            if (_preloadService != null &&
+                _preloadService.TryGetPreloadedHandle<TPanel>(out var preloadedHandle))
+            {
+                return preloadedHandle;
+            }
+
+            return await _resources.LoadAsync<GameObject>(path, cancellationToken);
+        }
+
+        private bool IsPreloadedHandle<TPanel>(IResourceHandle<GameObject> handle)
+        {
+            return _preloadService != null &&
+                   _preloadService.TryGetPreloadedHandle<TPanel>(out var preloadedHandle) &&
+                   ReferenceEquals(preloadedHandle, handle);
+        }
+
+        internal static UIPanelAttribute GetPanelAttribute(Type panelType)
         {
             var attribute = (UIPanelAttribute)Attribute.GetCustomAttribute(
                 panelType,
@@ -209,7 +237,7 @@ namespace FlowScope.UI
             return attribute;
         }
 
-        private static string ResolvePath(Type panelType, UIPanelAttribute attribute)
+        internal static string ResolvePath(Type panelType, UIPanelAttribute attribute)
         {
             if (!string.IsNullOrWhiteSpace(attribute.Path))
             {
@@ -225,5 +253,14 @@ namespace FlowScope.UI
 
             return $"UI/{name}/Prefab";
         }
+
+        private sealed class RetainedPanelHandle : IDisposable
+        {
+            public static readonly RetainedPanelHandle Instance = new();
+
+            public void Dispose()
+            {
+            }
+        }
     }
 }
diff --git a/My project/Assets/FlowScope/Runtime/UI/UIPreloadService.cs b/My project/Assets/FlowScope/Runtime/UI/UIPreloadService.cs
new file mode 100644
index 0000000..4dd6f01
--- /dev/null
+++ b/My project/Assets/FlowScope/Runtime/UI/UIPreloadService.cs	
@@ -0,0 +1,89 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using FlowScope.Resources;
+using UnityEngine;
+
+namespace FlowScope.UI
+{
+    public sealed class UIPreloadService : IUIPreloadService, IDisposable
+    {
+        private readonly IResourceService _resources;
+        private readonly Dictionary<Type, IResourceHandle<GameObject>> _handles = new();
+
+        public UIPreloadService(IResourceService resources)
+        {
+            _resources = resources ?? throw new ArgumentNullException(nameof(resources));
+        }
+
+        public async Task PreloadAsync<TPanel>(CancellationToken cancellationToken)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            var panelType = typeof(TPanel);
+            if (IsPreloaded<TPanel>())
+            {
+                return;
+            }
+
+            var attribute = UIManager.GetPanelAttribute(panelType);
+            var path = UIManager.ResolvePath(panelType, attribute);
+            var handle = await _resources.LoadAsync<GameObject>(path, cancellationToken);
+            if (handle == null || handle.Asset == null)
+            {
+                handle?.Dispose();
+                throw new InvalidOperationException($"UI panel resource is missing: {path}");
+            }
+
+            _handles[panelType] = handle;
+        }
+
+        public bool IsPreloaded<TPanel>()
+        {
+            return _handles.TryGetValue(typeof(TPanel), out var handle) &&
+                   handle != null &&
+                   !handle.IsDisposed &&
+                   handle.Asset != null;
+        }
+
+        public bool TryGetPreloadedHandle<TPanel>(out IResourceHandle<GameObject> handle)
+        {
+            if (IsPreloaded<TPanel>())
+            {
+                handle = _handles[typeof(TPanel)];
+                return true;
+            }
+
+            handle = null;
+            return false;
+        }
+
+        public void Release<TPanel>()
+        {
+            var panelType = typeof(TPanel);
+            if (!_handles.TryGetValue(panelType, out var handle))
+            {
+                return;
+            }
+
+            _handles.Remove(panelType);
+            handle.Dispose();
+        }
+
+        public void ReleaseAll()
+        {
+            foreach (var handle in _handles.Values)
+            {
+                handle.Dispose();
+            }
+
+            _handles.Clear();
+        }
+
+        public void Dispose()
+        {
+            ReleaseAll();
+        }
+    }
+}
diff --git a/My project/Assets/FlowScope/Runtime/UI/UIPreloadService.cs.meta b/My project/Assets/FlowScope/Runtime/UI/UIPreloadService.cs.meta
new file mode 100644
index 0000000..1e636c3
--- /dev/null
+++ b/My project/Assets/FlowScope/Runtime/UI/UIPreloadService.cs.meta	
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 6b2cbe6065884f82838b7c882ad5085a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/My project/Assets/FlowScope/Runtime/UI/UIScreenNavigator.cs b/My project/Assets/FlowScope/Runtime/UI/UIScreenNavigator.cs
new file mode 100644
index 0000000..aef83b3
--- /dev/null
+++ b/My project/Assets/FlowScope/Runtime/UI/UIScreenNavigator.cs	
@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace FlowScope.UI
+{
+    public sealed class UIScreenNavigator : IUIScreenNavigator
+    {
+        private readonly UIManager _uiManager;
+        private readonly Stack<Action> _closeStack = new();
+
+        public UIScreenNavigator(UIManager uiManager)
+        {
+            _uiManager = uiManager ?? throw new ArgumentNullException(nameof(uiManager));
+        }
+
+        public bool CanGoBack => _closeStack.Count > 1;
+
+        public async Task<TPanel> PushAsync<TPanel, TViewModel>(
+            TViewModel viewModel,
+            CancellationToken cancellationToken)
+            where TPanel : UIPanelBase<TViewModel>
+        {
+            var panel = await _uiManager.OpenAsync<TPanel, TViewModel>(viewModel, cancellationToken);
+            _closeStack.Push(() => _uiManager.Close<TPanel>());
+            return panel;
+        }
+
+        public void GoBack()
+        {
+            if (!CanGoBack)
+            {
+                return;
+            }
+
+            var close = _closeStack.Pop();
+            close();
+        }
+
+        public void Clear()
+        {
+            while (_closeStack.Count > 0)
+            {
+                var close = _closeStack.Pop();
+                close();
+            }
+        }
+    }
+}
diff --git a/My project/Assets/FlowScope/Runtime/UI/UIScreenNavigator.cs.meta b/My project/Assets/FlowScope/Runtime/UI/UIScreenNavigator.cs.meta
new file mode 100644
index 0000000..296aee5
--- /dev/null
+++ b/My project/Assets/FlowScope/Runtime/UI/UIScreenNavigator.cs.meta	
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: f991669426b4444098f1973daeb8fb58
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/My project/Assets/FlowScope/Tests/PlayMode/UI/UIPreloadServiceTests.cs b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIPreloadServiceTests.cs
new file mode 100644
index 0000000..dc0e519
--- /dev/null
+++ b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIPreloadServiceTests.cs	
@@ -0,0 +1,115 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading;
+using FlowScope.UI;
+using NUnit.Framework;
+using UnityEngine;
+using UnityEngine.TestTools;
+
+namespace FlowScope.Tests.PlayMode.UI
+{
+    public sealed class UIPreloadServiceTests
+    {
+        private readonly List<GameObject> _objects = new();
+
+        [TearDown]
+        public void TearDown()
+        {
+            foreach (var obj in _objects)
+            {
+                if (obj != null)
+                {
+                    UnityEngine.Object.DestroyImmediate(obj);
+                }
+            }
+
+            _objects.Clear();
+        }
+
+        [UnityTest]
+        public IEnumerator PreloadAsync_LoadsPanelResourceAndKeepsHandle()
+        {
+            var prefab = CreatePrefab<ExplicitPathPanel>("ExplicitPathPrefab");
+            var resources = new UITestResources();
+            resources.Register("Custom/Explicit", prefab);
+            var preload = new UIPreloadService(resources);
+
+            yield return UITestAsync.Await(preload.PreloadAsync<ExplicitPathPanel>(CancellationToken.None));
+
+            Assert.That(resources.LoadedKeys, Is.EqualTo(new[] { "Custom/Explicit" }));
+            Assert.That(preload.IsPreloaded<ExplicitPathPanel>(), Is.True);
+            Assert.That(preload.TryGetPreloadedHandle<ExplicitPathPanel>(out var handle), Is.True);
+            Assert.That(handle.Asset, Is.SameAs(prefab));
+            Assert.That(resources.Handles[0].IsDisposed, Is.False);
+        }
+
+        [UnityTest]
+        public IEnumerator PreloadAsync_WhenRepeated_DoesNotLoadAgain()
+        {
+            var prefab = CreatePrefab<ExplicitPathPanel>("ExplicitPathPrefab");
+            var resources = new UITestResources();
+            resources.Register("Custom/Explicit", prefab);
+            var preload = new UIPreloadService(resources);
+
+            yield return UITestAsync.Await(preload.PreloadAsync<ExplicitPathPanel>(CancellationToken.None));
+            yield return UITestAsync.Await(preload.PreloadAsync<ExplicitPathPanel>(CancellationToken.None));
+
+            Assert.That(resources.LoadedKeys, Is.EqualTo(new[] { "Custom/Explicit" }));
+            Assert.That(resources.Handles, Has.Count.EqualTo(1));
+        }
+
+        [UnityTest]
+        public IEnumerator OpenAsync_WhenPanelIsPreloaded_ReusesPreloadedHandle()
+        {
+            var canvas = CreateCanvas("popup");
+            var prefab = CreatePrefab<ExplicitPathPanel>("ExplicitPathPrefab");
+            var resources = new UITestResources();
+            resources.Register("Custom/Explicit", prefab);
+            var preload = new UIPreloadService(resources);
+            var manager = new UIManager(resources, preload);
+            manager.RegisterLayer("popup", canvas, 0);
+
+            yield return UITestAsync.Await(preload.PreloadAsync<ExplicitPathPanel>(CancellationToken.None));
+            yield return UITestAsync.Await(
+                manager.OpenAsync<ExplicitPathPanel, TestViewModel>(
+                    new TestViewModel("preloaded"),
+                    CancellationToken.None));
+            manager.Close<ExplicitPathPanel>();
+
+            Assert.That(resources.LoadedKeys, Is.EqualTo(new[] { "Custom/Explicit" }));
+            Assert.That(resources.Handles[0].IsDisposed, Is.False);
+            Assert.That(preload.IsPreloaded<ExplicitPathPanel>(), Is.True);
+        }
+
+        [UnityTest]
+        public IEnumerator Release_DisposesPreloadedHandle()
+        {
+            var prefab = CreatePrefab<ExplicitPathPanel>("ExplicitPathPrefab");
+            var resources = new UITestResources();
+            resources.Register("Custom/Explicit", prefab);
+            var preload = new UIPreloadService(resources);
+
+            yield return UITestAsync.Await(preload.PreloadAsync<ExplicitPathPanel>(CancellationToken.None));
+            preload.Release<ExplicitPathPanel>();
+
+            Assert.That(resources.Handles[0].IsDisposed, Is.True);
+            Assert.That(preload.IsPreloaded<ExplicitPathPanel>(), Is.False);
+        }
+
+        private Canvas CreateCanvas(string name)
+        {
+            var gameObject = new GameObject(name);
+            _objects.Add(gameObject);
+            return gameObject.AddComponent<Canvas>();
+        }
+
+        private GameObject CreatePrefab<TPanel>(string name)
+            where TPanel : Component
+        {
+            var gameObject = new GameObject(name);
+            _objects.Add(gameObject);
+            gameObject.AddComponent<TPanel>();
+            return gameObject;
+        }
+    }
+}
diff --git a/My project/Assets/FlowScope/Tests/PlayMode/UI/UIPreloadServiceTests.cs.meta b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIPreloadServiceTests.cs.meta
new file mode 100644
index 0000000..b036dcc
--- /dev/null
+++ b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIPreloadServiceTests.cs.meta	
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 737c460841f54ab5a073695d039b9524
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/My project/Assets/FlowScope/Tests/PlayMode/UI/UIScreenNavigatorTests.cs b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIScreenNavigatorTests.cs
new file mode 100644
index 0000000..12059dd
--- /dev/null
+++ b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIScreenNavigatorTests.cs	
@@ -0,0 +1,156 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading;
+using FlowScope.UI;
+using NUnit.Framework;
+using UnityEngine;
+using UnityEngine.TestTools;
+
+namespace FlowScope.Tests.PlayMode.UI
+{
+    public sealed class UIScreenNavigatorTests
+    {
+        private readonly List<GameObject> _objects = new();
+
+        [TearDown]
+        public void TearDown()
+        {
+            foreach (var obj in _objects)
+            {
+                if (obj != null)
+                {
+                    UnityEngine.Object.DestroyImmediate(obj);
+                }
+            }
+
+            _objects.Clear();
+        }
+
+        [UnityTest]
+        public IEnumerator PushAsync_OpensPanelAndRecordsHistory()
+        {
+            var manager = CreateManager(out _);
+            var navigator = new UIScreenNavigator(manager);
+
+            ExplicitPathPanel panel = null;
+            yield return UITestAsync.Await(
+                navigator.PushAsync<ExplicitPathPanel, TestViewModel>(
+                    new TestViewModel("first"),
+                    CancellationToken.None),
+                result => panel = result);
+
+            Assert.That(panel, Is.Not.Null);
+            Assert.That(manager.IsOpen<ExplicitPathPanel>(), Is.True);
+            Assert.That(navigator.CanGoBack, Is.False);
+        }
+
+        [UnityTest]
+        public IEnumerator GoBack_ClosesTopPanel()
+        {
+            var manager = CreateManager(out _);
+            var navigator = new UIScreenNavigator(manager);
+
+            yield return UITestAsync.Await(
+                navigator.PushAsync<ExplicitPathPanel, TestViewModel>(
+                    new TestViewModel("first"),
+                    CancellationToken.None));
+            yield return UITestAsync.Await(
+                navigator.PushAsync<SecondPanel, TestViewModel>(
+                    new TestViewModel("second"),
+                    CancellationToken.None));
+
+            Assert.That(navigator.CanGoBack, Is.True);
+            navigator.GoBack();
+
+            Assert.That(manager.IsOpen<SecondPanel>(), Is.False);
+            Assert.That(manager.IsOpen<ExplicitPathPanel>(), Is.True);
+            Assert.That(navigator.CanGoBack, Is.False);
+        }
+
+        [UnityTest]
+        public IEnumerator Clear_ClosesAllNavigatorPanels()
+        {
+            var manager = CreateManager(out _);
+            var navigator = new UIScreenNavigator(manager);
+
+            yield return UITestAsync.Await(
+                navigator.PushAsync<ExplicitPathPanel, TestViewModel>(
+                    new TestViewModel("first"),
+                    CancellationToken.None));
+            yield return UITestAsync.Await(
+                navigator.PushAsync<SecondPanel, TestViewModel>(
+                    new TestViewModel("second"),
+                    CancellationToken.None));
+
+            navigator.Clear();
+
+            Assert.That(manager.IsOpen<ExplicitPathPanel>(), Is.False);
+            Assert.That(manager.IsOpen<SecondPanel>(), Is.False);
+            Assert.That(navigator.CanGoBack, Is.False);
+        }
+
+        [UnityTest]
+        public IEnumerator GoBack_WhenOnlyOnePanelOpen_DoesNothing()
+        {
+            var manager = CreateManager(out _);
+            var navigator = new UIScreenNavigator(manager);
+
+            yield return UITestAsync.Await(
+                navigator.PushAsync<ExplicitPathPanel, TestViewModel>(
+                    new TestViewModel("first"),
+                    CancellationToken.None));
+            navigator.GoBack();
+
+            Assert.That(manager.IsOpen<ExplicitPathPanel>(), Is.True);
+            Assert.That(navigator.CanGoBack, Is.False);
+        }
+
+        [UnityTest]
+        public IEnumerator Clear_DoesNotClosePanelsOpenedOutsideNavigator()
+        {
+            var manager = CreateManager(out _);
+            var navigator = new UIScreenNavigator(manager);
+
+            yield return UITestAsync.Await(
+                manager.OpenAsync<ExplicitPathPanel, TestViewModel>(
+                    new TestViewModel("outside"),
+                    CancellationToken.None));
+            yield return UITestAsync.Await(
+                navigator.PushAsync<SecondPanel, TestViewModel>(
+                    new TestViewModel("inside"),
+                    CancellationToken.None));
+
+            navigator.Clear();
+
+            Assert.That(manager.IsOpen<SecondPanel>(), Is.False);
+            Assert.That(manager.IsOpen<ExplicitPathPanel>(), Is.True);
+        }
+
+        private UIManager CreateManager(out UITestResources resources)
+        {
+            var canvas = CreateCanvas("popup");
+            resources = new UITestResources();
+            resources.Register("Custom/Explicit", CreatePrefab<ExplicitPathPanel>("ExplicitPathPrefab"));
+            resources.Register("UI/Second/Prefab", CreatePrefab<SecondPanel>("SecondPrefab"));
+            var manager = new UIManager(resources);
+            manager.RegisterLayer("popup", canvas, 0);
+            return manager;
+        }
+
+        private Canvas CreateCanvas(string name)
+        {
+            var gameObject = new GameObject(name);
+            _objects.Add(gameObject);
+            return gameObject.AddComponent<Canvas>();
+        }
+
+        private GameObject CreatePrefab<TPanel>(string name)
+            where TPanel : Component
+        {
+            var gameObject = new GameObject(name);
+            _objects.Add(gameObject);
+            gameObject.AddComponent<TPanel>();
+            return gameObject;
+        }
+    }
+}
diff --git a/My project/Assets/FlowScope/Tests/PlayMode/UI/UIScreenNavigatorTests.cs.meta b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIScreenNavigatorTests.cs.meta
new file mode 100644
index 0000000..8339d65
--- /dev/null
+++ b/My project/Assets/FlowScope/Tests/PlayMode/UI/UIScreenNavigatorTests.cs.meta	
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 09c0ef54950240efb3894c9ff75f4eea
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/My project/Assets/FlowScope/Tests/PlayMode/UI/UITestHelpers.cs b/My project/Assets/FlowScope/Tests/PlayMode/UI/UITestHelpers.cs
new file mode 100644
index 0000000..c006d3f
--- /dev/null
+++ b/My project/Assets/FlowScope/Tests/PlayMode/UI/UITestHelpers.cs	
@@ -0,0 +1,104 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using FlowScope.Resources;
+using UnityEngine;
+
+namespace FlowScope.Tests.PlayMode.UI
+{
+    internal sealed class UITestResources : IResourceService
+    {
+        private readonly Dictionary<string, GameObject> _assets = new();
+
+        public List<string> LoadedKeys { get; } = new();
+        public List<UITestResourceHandle<GameObject>> Handles { get; } = new();
+
+        public void Register(string key, GameObject asset)
+        {
+            _assets.Add(key, asset);
+        }
+
+        public Task<IResourceHandle<T>> LoadAsync<T>(string key, CancellationToken cancellationToken)
+            where T : class
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+            LoadedKeys.Add(key);
+
+            if (!_assets.TryGetValue(key, out var asset))
+            {
+                throw new InvalidOperationException($"Missing resource: {key}");
+            }
+
+            var handle = new UITestResourceHandle<GameObject>(key, asset);
+            Handles.Add(handle);
+            return Task.FromResult<IResourceHandle<T>>((IResourceHandle<T>)(object)handle);
+        }
+
+        public IResourceGroup CreateGroup()
+        {
+            throw new NotSupportedException();
+        }
+    }
+
+    internal sealed class UITestResourceHandle<T> : IResourceHandle<T>
+        where T : class
+    {
+        public UITestResourceHandle(string key, T asset)
+        {
+            Key = key;
+            Asset = asset;
+        }
+
+        public string Key { get; }
+        public T Asset { get; private set; }
+        public bool IsDisposed { get; private set; }
+
+        public void Dispose()
+        {
+            IsDisposed = true;
+        }
+    }
+
+    internal static class UITestAsync
+    {
+        public static IEnumerator Await(Task task)
+        {
+            while (!task.IsCompleted)
+            {
+                yield return null;
+            }
+
+            if (task.IsFaulted)
+            {
+                throw task.Exception.GetBaseException();
+            }
+
+            if (task.IsCanceled)
+            {
+                throw new OperationCanceledException();
+            }
+        }
+
+        public static IEnumerator Await<T>(Task<T> task, Action<T> onCompleted)
+        {
+            while (!task.IsCompleted)
+            {
+                yield return null;
+            }
+
+            if (task.IsFaulted)
+            {
+                throw task.Exception.GetBaseException();
+            }
+
+            if (task.IsCanceled)
+            {
+                throw new OperationCanceledException();
+            }
+
+            onCompleted(task.Result);
+        }
+    }
+}
diff --git a/My project/Assets/FlowScope/Tests/PlayMode/UI/UITestHelpers.cs.meta b/My project/Assets/FlowScope/Tests/PlayMode/UI/UITestHelpers.cs.meta
new file mode 100644
index 0000000..14eb3a1
--- /dev/null
+++ b/My project/Assets/FlowScope/Tests/PlayMode/UI/UITestHelpers.cs.meta	
@@ -0,0 +1,11 @@
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+MonoImporter:
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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