diff --git a/src/PepperDash.Essentials.Core/Routing/IHasNamedRoutingSlots.cs b/src/PepperDash.Essentials.Core/Routing/IHasNamedRoutingSlots.cs
new file mode 100644
index 00000000..84b5983e
--- /dev/null
+++ b/src/PepperDash.Essentials.Core/Routing/IHasNamedRoutingSlots.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using PepperDash.Core;
+
+namespace PepperDash.Essentials.Core;
+
+/// <summary>
+/// Describes a single named routing slot (input or output) on a device implementing
+/// <see cref="IHasNamedRoutingSlots"/>.
+/// </summary>
+public interface IRoutingSlotInfo : IKeyName
+{
+    /// <summary>Matrix slot number.</summary>
+    int SlotNumber { get; }
+
+    /// <summary>Signal types this slot can carry.</summary>
+    eRoutingSignalType SupportedSignalTypes { get; }
+}
+
+/// <summary>
+/// Describes a named output slot, adding per-signal-type current-route feedback (keyed by the
+/// routed input slot's key) that <see cref="IRoutingMidpointWithFeedback.CurrentRoutes"/> does not
+/// carry.
+/// </summary>
+public interface IRoutingOutputSlotInfo : IRoutingSlotInfo
+{
+    /// <summary>The key of the input slot currently routed to this output, per signal type.</summary>
+    IReadOnlyDictionary<eRoutingSignalType, string> CurrentRouteInputKeys { get; }
+
+    /// <summary>Raised when the routed input on this output changes.</summary>
+    event EventHandler OutputSlotChanged;
+}
+
+/// <summary>
+/// Optional extension to <see cref="IRoutingMidpointWithFeedback"/> for matrix-style routing
+/// devices that track named input/output slots (with per-signal-type routing feedback) internally,
+/// e.g. plugin-local slot abstractions that replaced the removed core <c>IRoutingInputSlot</c>/
+/// <c>IRoutingOutputSlot</c> during the v3 routing refactor. Devices implementing this get a richer
+/// mobile-control matrix routing message (names + per-signal-type feedback) instead of the bare
+/// key-only ports from <see cref="IRoutingMidpointWithFeedback"/> alone.
+/// </summary>
+public interface IHasNamedRoutingSlots : IRoutingMidpointWithFeedback
+{
+    /// <summary>Named input slots, keyed by slot key.</summary>
+    IReadOnlyDictionary<string, IRoutingSlotInfo> InputSlots { get; }
+
+    /// <summary>Named output slots, keyed by slot key.</summary>
+    IReadOnlyDictionary<string, IRoutingOutputSlotInfo> OutputSlots { get; }
+}
diff --git a/src/PepperDash.Essentials.MobileControl.Messengers/Messengers/IHasNamedRoutingSlotsMessenger.cs b/src/PepperDash.Essentials.MobileControl.Messengers/Messengers/IHasNamedRoutingSlotsMessenger.cs
new file mode 100644
index 00000000..855a4aa7
--- /dev/null
+++ b/src/PepperDash.Essentials.MobileControl.Messengers/Messengers/IHasNamedRoutingSlotsMessenger.cs
@@ -0,0 +1,85 @@
+using System.Collections.Generic;
+using System.Linq;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using PepperDash.Core;
+using PepperDash.Essentials.Core;
+
+namespace PepperDash.Essentials.AppServer.Messengers
+{
+    /// <summary>
+    /// Messenger for devices implementing <see cref="IHasNamedRoutingSlots"/> — sends named
+    /// input/output slots with per-signal-type current-route feedback, which the bare
+    /// <see cref="IRoutingMidpointWithFeedbackMessenger"/> (registered for every
+    /// <see cref="IRoutingMidpointWithFeedback"/> device, including this one) cannot provide.
+    /// </summary>
+    public class IHasNamedRoutingSlotsMessenger : MessengerBase
+    {
+        private readonly IHasNamedRoutingSlots _device;
+
+        public IHasNamedRoutingSlotsMessenger(string key, string messagePath, IHasNamedRoutingSlots device)
+            : base(key, messagePath, device as IKeyName)
+        {
+            _device = device;
+        }
+
+        protected override void RegisterActions()
+        {
+            base.RegisterActions();
+
+            AddAction("/fullStatus", (id, content) => SendFullStatus(id));
+
+            foreach (var output in _device.OutputSlots.Values)
+            {
+                output.OutputSlotChanged += (sender, args) => SendFullStatus();
+            }
+        }
+
+        private static RoutingSlotMessage BuildSlotMessage(IRoutingSlotInfo slot) => new RoutingSlotMessage
+        {
+            Key = slot.Key,
+            Name = slot.Name,
+            SlotNumber = slot.SlotNumber,
+            SupportedSignalTypes = slot.SupportedSignalTypes.ToString()
+        };
+
+        private void SendFullStatus(string id = null)
+        {
+            var inputSlots = _device.InputSlots.ToDictionary(kvp => kvp.Key, kvp => BuildSlotMessage(kvp.Value));
+
+            var outputSlots = _device.OutputSlots.ToDictionary(kvp => kvp.Key, kvp =>
+            {
+                var message = BuildSlotMessage(kvp.Value);
+                message.CurrentRouteInputKeys = kvp.Value.CurrentRouteInputKeys
+                    .ToDictionary(r => r.Key.ToString(), r => r.Value);
+                return message;
+            });
+
+            var content = JToken.FromObject(new
+            {
+                inputSlots,
+                outputSlots
+            });
+
+            PostStatusMessage(content, MessagePath, id);
+        }
+    }
+
+    public class RoutingSlotMessage
+    {
+        [JsonProperty("key")]
+        public string Key { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("slotNumber")]
+        public int SlotNumber { get; set; }
+
+        [JsonProperty("supportedSignalTypes")]
+        public string SupportedSignalTypes { get; set; }
+
+        [JsonProperty("currentRouteInputKeys", NullValueHandling = NullValueHandling.Ignore)]
+        public Dictionary<string, string> CurrentRouteInputKeys { get; set; }
+    }
+}
diff --git a/src/PepperDash.Essentials.MobileControl/MessengerFactoryRegistry.cs b/src/PepperDash.Essentials.MobileControl/MessengerFactoryRegistry.cs
index d2b5c73e..29ede86d 100644
--- a/src/PepperDash.Essentials.MobileControl/MessengerFactoryRegistry.cs
+++ b/src/PepperDash.Essentials.MobileControl/MessengerFactoryRegistry.cs
@@ -374,6 +374,14 @@ namespace PepperDash.Essentials
                     (d, mp, _) => new IRoutingMidpointWithFeedbackMessenger(
                         $"{d.Key}-matrixRouting", mp, (IRoutingMidpointWithFeedback)d)
                 ),
+                // Devices that also expose named slots (plugin-local IDmInputSlot/INvxInputSlot-
+                // style abstractions) get a second, richer message with names + per-signal-type
+                // route feedback the bare messenger above cannot provide.
+                new MessengerFactoryEntry(
+                    typeof(IHasNamedRoutingSlots),
+                    (d, mp, _) => new IHasNamedRoutingSlotsMessenger(
+                        $"{d.Key}-namedRoutingSlots", mp, (IHasNamedRoutingSlots)d)
+                ),
 
                 // ── Environmental sensors ─────────────────────────────────────────────────
                 // Preserving original key format (no controller key suffix)