diff --git a/src/ZB.MOM.WW.MxGateway.Worker.Tests/Probes/AlarmSubtagLiveSmokeTests.cs b/src/ZB.MOM.WW.MxGateway.Worker.Tests/Probes/AlarmSubtagLiveSmokeTests.cs
index 41ff65a..a19ea85 100644
--- a/src/ZB.MOM.WW.MxGateway.Worker.Tests/Probes/AlarmSubtagLiveSmokeTests.cs
+++ b/src/ZB.MOM.WW.MxGateway.Worker.Tests/Probes/AlarmSubtagLiveSmokeTests.cs
@@ -288,6 +288,97 @@ public sealed class AlarmSubtagLiveSmokeTests
         Log("CONFIRMED: runtime subtag path resolves and the AckMsg write succeeded.");
     }
 
+    /// <summary>
+    ///     Operator-driven watch on <c>TestMachine_001.TestAlarm002</c> (currently
+    ///     inactive). Subscribes the subtag route, then waits for an operator to
+    ///     toggle the alarm true (Raise) and back to false (Clear), asserting both
+    ///     transitions are synthesized with the degraded flag + synthetic GUID.
+    ///     Runs only with <c>MXGATEWAY_RUN_LIVE_MXACCESS_TESTS=1</c>; exits as soon
+    ///     as both transitions are seen.
+    /// </summary>
+    [LiveMxAccessFact]
+    public void LiveWatch_TestAlarm002_RaiseThenClear()
+    {
+        Exception? threadException = null;
+        ManualResetEventSlim done = new ManualResetEventSlim(false);
+        Thread thread = new Thread(() =>
+        {
+            try { RunWatch002(); }
+            catch (Exception ex) { threadException = ex; }
+            finally { done.Set(); }
+        });
+        thread.IsBackground = false;
+        thread.SetApartmentState(ApartmentState.STA);
+        thread.Start();
+        done.Wait();
+        thread.Join();
+
+        List<string> lines = new List<string>();
+        string? line;
+        while (log.TryDequeue(out line)) { output.WriteLine(line); lines.Add(line); }
+        string logPath = Environment.GetEnvironmentVariable("PROBE_LOG")
+            ?? System.IO.Path.Combine(System.IO.Path.GetTempPath(), "alarm002-watch.log");
+        try { System.IO.File.WriteAllLines(logPath, lines); } catch { /* best effort */ }
+        if (threadException != null) { throw threadException; }
+    }
+
+    private void RunWatch002()
+    {
+        const string alarm = "TestMachine_001.TestAlarm002";
+        string fullRef = AlarmRecordTransitionMapper.ComposeFullReference(Provider, Group, alarm);
+        Log("=== Watch TestAlarm002 for operator-driven Raise + Clear ===");
+        Log("AlarmFullReference: " + fullRef);
+
+        AlarmSubtagTarget target = new AlarmSubtagTarget
+        {
+            AlarmFullReference = fullRef,
+            SourceObjectReference = alarm,
+            ActiveSubtag = alarm + ".InAlarm",
+            AckedSubtag = alarm + ".Acked",
+            AckCommentSubtag = alarm + ".AckMsg",
+            PrioritySubtag = alarm + ".Priority",
+        };
+        List<AlarmSubtagTarget> watchList = new List<AlarmSubtagTarget> { target };
+
+        MxAccessComObjectFactory factory = new MxAccessComObjectFactory();
+        LmxSubtagAlarmSource source = new LmxSubtagAlarmSource(factory, clientName: null);
+        using SubtagAlarmConsumer consumer = new SubtagAlarmConsumer(source, watchList);
+
+        ConcurrentQueue<MxAlarmTransitionEvent> transitions =
+            new ConcurrentQueue<MxAlarmTransitionEvent>();
+        consumer.AlarmTransitionEmitted += (_, e) =>
+        {
+            Log("Transition: " + DescribeTransition(e));
+            transitions.Enqueue(e);
+        };
+        source.ValueChanged += (_, c) =>
+            Log(string.Format("raw: {0} = {1}", c.ItemAddress, c.Value ?? "<null>"));
+
+        consumer.Subscribe(string.Format(@"\\{0}\Galaxy!{1}", Environment.MachineName, Group));
+
+        // Warm up so the items go active; drain any initial transition.
+        DateTime warm = DateTime.UtcNow + TimeSpan.FromSeconds(8);
+        while (DateTime.UtcNow < warm) { PumpMessages(); Thread.Sleep(100); }
+        MxAlarmTransitionEvent? ignored;
+        while (transitions.TryDequeue(out ignored)) { }
+
+        Log(">>> WATCHING. Toggle TestMachine_001.TestAlarm002 TRUE, hold ~10s, then FALSE. <<<");
+
+        MxAlarmTransitionEvent? raise = WaitForTransitionKind(
+            transitions, AlarmTransitionKind.Raise, TimeSpan.FromSeconds(150), "Raise");
+        Assert.NotNull(raise);
+        Assert.True(raise!.Record.Degraded, "Subtag-synthesized records must have Degraded=true.");
+        Assert.NotEqual(Guid.Empty, raise.Record.AlarmGuid);
+        Assert.Equal(MxAlarmStateKind.UnackAlm, raise.Record.State);
+        Log(string.Format("RAISE captured: Guid={0} State={1}", raise.Record.AlarmGuid, raise.Record.State));
+
+        MxAlarmTransitionEvent? clear = WaitForTransitionKind(
+            transitions, AlarmTransitionKind.Clear, TimeSpan.FromSeconds(150), "Clear");
+        Assert.NotNull(clear);
+        Log(string.Format("CLEAR captured: State={0}", clear!.Record.State));
+        Log("Operator-driven Raise -> Clear confirmed end-to-end via the subtag route.");
+    }
+
     private void RunSmoke()
     {
         Log(string.Format("AlarmFullReference: {0}", AlarmFullReference));