diff --git a/src/AcDream.App/Rendering/GameWindow.cs b/src/AcDream.App/Rendering/GameWindow.cs
index 28de8fd..9fc7279 100644
--- a/src/AcDream.App/Rendering/GameWindow.cs
+++ b/src/AcDream.App/Rendering/GameWindow.cs
@@ -2128,12 +2128,16 @@ public sealed class GameWindow : IDisposable
     }
 
     /// <summary>
-    /// Phase B.4c — door detection by server-sent name. Doors fail the
-    /// generic multi-frame-idle gate at line 2692 (no idle cycle), so we
-    /// register them via a sibling branch with a state-seeded sequencer.
+    /// Door detection by server-sent name. Doors fail the generic
+    /// multi-frame-idle gate at line 2692 (no idle cycle), so we register
+    /// them via a sibling branch with a state-seeded sequencer. Shared
+    /// with the [door-cycle] UM dispatch diagnostic — both sites must
+    /// agree on the name predicate.
     /// </summary>
+    private static bool IsDoorName(string? name) => name == "Door";
+
     private static bool IsDoorSpawn(AcDream.Core.Net.WorldSession.EntitySpawn spawn)
-        => spawn.Name == "Door";
+        => IsDoorName(spawn.Name);
 
     private void OnLiveEntitySpawnedLocked(AcDream.Core.Net.WorldSession.EntitySpawn spawn)
     {
@@ -3149,13 +3153,13 @@ public sealed class GameWindow : IDisposable
                 $"| seq now style=0x{seqStyle:X8} motion=0x{seqMotion:X8}");
         }
 
-        // Phase B.4c — durable per-Door UM dispatch trail for visual-test grep.
+        // Per-Door UM dispatch trail; grep [door-cycle] in launch.log to verify door animation.
         if (AcDream.Core.Physics.PhysicsDiagnostics.ProbeBuildingEnabled
             && _liveEntityInfoByGuid.TryGetValue(update.Guid, out var doorInfo)
-            && doorInfo.Name == "Door")
+            && IsDoorName(doorInfo.Name))
         {
             Console.WriteLine(System.FormattableString.Invariant(
-                $"[door-cycle] guid=0x{update.Guid:X8} stance=0x{update.MotionState.Stance:X4} cmd=0x{(update.MotionState.ForwardCommand ?? 0u):X4}"));
+                $"[door-cycle] guid=0x{update.Guid:X8} stance=0x{stance:X4} cmd=0x{(command ?? 0u):X4}"));
         }
 
         // Wire server-echoed RunRate first — used for the player's own