diff --git a/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs b/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs
index cdf7980..45f0e88 100644
--- a/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs
+++ b/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs
@@ -206,6 +206,7 @@ public sealed class DebugPanel : IPanel
         bool probeResolve  = _vm.ProbeResolve;
         bool probeCell     = _vm.ProbeCell;
         bool probeBuilding = _vm.ProbeBuilding;
+        bool probeAutoWalk = _vm.ProbeAutoWalk;
 
         if (r.Checkbox("Dump motion (ACDREAM_DUMP_MOTION)",     ref dumpMotion))   _vm.DumpMotion   = dumpMotion;
         if (r.Checkbox("Dump vitals (ACDREAM_DUMP_VITALS)",     ref dumpVitals))   _vm.DumpVitals   = dumpVitals;
@@ -220,6 +221,10 @@ public sealed class DebugPanel : IPanel
         // [resolve-bldg] entries; expect log volume to spike at walls.
         if (r.Checkbox("Probe BSP hits (ACDREAM_PROBE_BUILDING, slow)",
                        ref probeBuilding))                              _vm.ProbeBuilding = probeBuilding;
+        // B.6 slice 1 (2026-05-14): local-player auto-walk trace for issue #63.
+        // Low volume — only the local player's UM/UP/Use/PickUp events emit.
+        if (r.Checkbox("Probe auto-walk (ACDREAM_PROBE_AUTOWALK)",
+                       ref probeAutoWalk))                              _vm.ProbeAutoWalk = probeAutoWalk;
 
         r.Spacing();
 
diff --git a/src/AcDream.UI.Abstractions/Panels/Debug/DebugVM.cs b/src/AcDream.UI.Abstractions/Panels/Debug/DebugVM.cs
index e08750d..ef99a25 100644
--- a/src/AcDream.UI.Abstractions/Panels/Debug/DebugVM.cs
+++ b/src/AcDream.UI.Abstractions/Panels/Debug/DebugVM.cs
@@ -275,6 +275,21 @@ public sealed class DebugVM
         set => PhysicsDiagnostics.ProbeBuildingEnabled = value;
     }
 
+    /// <summary>
+    /// B.6 slice 1 (2026-05-14). Runtime mirror of
+    /// <c>PhysicsDiagnostics.ProbeAutoWalkEnabled</c> (env var
+    /// <c>ACDREAM_PROBE_AUTOWALK</c>). Toggling here flips the
+    /// <c>[autowalk-out]</c> / <c>[autowalk-mt]</c> / <c>[autowalk-up]</c>
+    /// trace used to characterize ACE's behavior during a server-
+    /// initiated auto-walk (issue #63). Low volume when off — only the
+    /// local player's events are filtered through the probe.
+    /// </summary>
+    public bool ProbeAutoWalk
+    {
+        get => PhysicsDiagnostics.ProbeAutoWalkEnabled;
+        set => PhysicsDiagnostics.ProbeAutoWalkEnabled = value;
+    }
+
     // ── Action hooks invoked by panel buttons ──────────────────────────
 
     /// <summary>