diff --git a/src/AcDream.App/Rendering/GameWindow.cs b/src/AcDream.App/Rendering/GameWindow.cs
index 1488fc3a..2c19fde5 100644
--- a/src/AcDream.App/Rendering/GameWindow.cs
+++ b/src/AcDream.App/Rendering/GameWindow.cs
@@ -1780,6 +1780,11 @@ public sealed class GameWindow : IDisposable
                 return (t, w, h);
             }
 
+            // Phase D.5.1 — icon composer for the toolbar shortcut slots.
+            // Constructed once here so the closure below can capture it; needs
+            // the same cache reference that ResolveChrome uses above.
+            var iconComposer = new AcDream.App.UI.IconComposer(_dats!, cache);
+
             // Phase D.2b — optional retail stylesheet. controls.ini lives under
             // the AC install (ACDREAM_AC_DIR); absent → source-verified fallback.
             var controls = _options.AcDir is { } acDir
@@ -1902,6 +1907,29 @@ public sealed class GameWindow : IDisposable
             }
             else Console.WriteLine("[D.2b] chat: LayoutDesc 0x21000006 not found.");
 
+            // Phase D.5.1 — toolbar window, data-driven from LayoutDesc 0x21000016
+            // (gmToolbarUI). Mirrors the vitals/chat import+bind+mount pattern above.
+            AcDream.App.UI.Layout.ImportedLayout? toolbarLayout;
+            lock (_datLock)
+                toolbarLayout = AcDream.App.UI.Layout.LayoutImporter.Import(
+                    _dats!, 0x21000016u, ResolveChrome, vitalsDatFont);
+            if (toolbarLayout is not null)
+            {
+                AcDream.App.UI.Layout.ToolbarController.Bind(
+                    toolbarLayout, Items,
+                    () => Shortcuts,
+                    iconIds: (icon, under, over) => iconComposer.GetIcon(icon, under, over),
+                    useItem: guid => UseItemByGuid(guid));
+
+                var toolbarRoot = toolbarLayout.Root;
+                toolbarRoot.Left = 10; toolbarRoot.Top = 300;
+                toolbarRoot.Anchors = AcDream.App.UI.AnchorEdges.Left | AcDream.App.UI.AnchorEdges.Top;
+                toolbarRoot.Draggable = true;
+                _uiHost.Root.AddChild(toolbarRoot);
+                Console.WriteLine("[D.5.1] retail toolbar window from LayoutDesc importer (0x21000016).");
+            }
+            else Console.WriteLine("[D.5.1] toolbar: LayoutDesc 0x21000016 not found.");
+
             // Drain plugin-registered markup panels (buffered before the GL
             // window opened) into the same UiRoot tree. A faulty plugin markup
             // file is isolated — logged + skipped, never crashes the client.
@@ -11594,6 +11622,17 @@ public sealed class GameWindow : IDisposable
         }
     }
 
+    // Phase D.5.1 — direct use-by-guid for toolbar shortcut clicks.
+    // Mirrors the B.4b far-range send path; no proximity / auto-walk needed
+    // for items already in the player's inventory.
+    private void UseItemByGuid(uint guid)
+    {
+        if (_liveSession is null) return;
+        var seq  = _liveSession.NextGameActionSequence();
+        var body = AcDream.Core.Net.Messages.InteractRequests.BuildUse(seq, guid);
+        _liveSession.SendGameAction(body);
+    }
+
     private void SendPickUp(uint itemGuid)
     {
         if (_liveSession is null