Add stream-alarms and acknowledge-alarm to the .NET CLI

stream-alarms attaches to the gateway's central alarm feed (mirrors
stream-events: --max-events cap, --json/--jsonl, --filter-prefix);
acknowledge-alarm is a unary session-less ack (--reference required,
--comment, --operator). Both wired through IMxGatewayCliClient and the
adapter.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/dotnet/MxGateway.Client.Cli/IMxGatewayCliClient.cs

@@ -51,6 +51,27 @@ public interface IMxGatewayCliClient : IAsyncDisposable
         StreamEventsRequest request,
         CancellationToken cancellationToken);
 
+    /// <summary>
+    /// Acknowledges an active MXAccess alarm condition through the gateway.
+    /// </summary>
+    /// <param name="request">The acknowledge request — alarm reference, comment, operator user.</param>
+    /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>The acknowledge reply with protocol + native MxStatus.</returns>
+    Task<AcknowledgeAlarmReply> AcknowledgeAlarmAsync(
+        AcknowledgeAlarmRequest request,
+        CancellationToken cancellationToken);
+
+    /// <summary>
+    /// Attaches to the gateway's central alarm feed — the current active-alarm
+    /// snapshot followed by live transitions.
+    /// </summary>
+    /// <param name="request">The stream request, optionally scoped by alarm-reference prefix.</param>
+    /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>An async enumerable of alarm feed messages.</returns>
+    IAsyncEnumerable<AlarmFeedMessage> StreamAlarmsAsync(
+        StreamAlarmsRequest request,
+        CancellationToken cancellationToken);
+
     /// <summary>
     /// Tests connection to the Galaxy Repository.
     /// </summary>

clients/dotnet/MxGateway.Client.Cli/MxGatewayCliClientAdapter.cs

@@ -52,6 +52,22 @@ internal sealed class MxGatewayCliClientAdapter : IMxGatewayCliClient
         return _client.StreamEventsAsync(request, cancellationToken);
     }
 
+    /// <inheritdoc />
+    public Task<AcknowledgeAlarmReply> AcknowledgeAlarmAsync(
+        AcknowledgeAlarmRequest request,
+        CancellationToken cancellationToken)
+    {
+        return _client.AcknowledgeAlarmAsync(request, cancellationToken);
+    }
+
+    /// <inheritdoc />
+    public IAsyncEnumerable<AlarmFeedMessage> StreamAlarmsAsync(
+        StreamAlarmsRequest request,
+        CancellationToken cancellationToken)
+    {
+        return _client.StreamAlarmsAsync(request, cancellationToken);
+    }
+
     /// <inheritdoc />
     public Task<TestConnectionReply> GalaxyTestConnectionAsync(
         TestConnectionRequest request,

clients/dotnet/MxGateway.Client.Cli/MxGatewayClientCli.cs

@@ -130,6 +130,10 @@ public static class MxGatewayClientCli
                     .ConfigureAwait(false),
                 "stream-events" => await StreamEventsAsync(arguments, client, standardOutput, cancellation.Token)
                     .ConfigureAwait(false),
+                "stream-alarms" => await StreamAlarmsAsync(arguments, client, standardOutput, cancellation.Token)
+                    .ConfigureAwait(false),
+                "acknowledge-alarm" => await AcknowledgeAlarmAsync(arguments, client, standardOutput, cancellation.Token)
+                    .ConfigureAwait(false),
                 "write" => await WriteAsync(arguments, client, standardOutput, cancellation.Token)
                     .ConfigureAwait(false),
                 "write2" => await Write2Async(arguments, client, standardOutput, cancellation.Token)
@@ -1353,6 +1357,124 @@ public static class MxGatewayClientCli
         return 0;
     }
 
+    private static async Task<int> StreamAlarmsAsync(
+        CliArguments arguments,
+        IMxGatewayCliClient client,
+        TextWriter output,
+        CancellationToken cancellationToken)
+    {
+        uint maxEvents = arguments.GetUInt32("max-events", 0);
+        bool json = arguments.HasFlag("json");
+        bool jsonLines = arguments.HasFlag("jsonl");
+        if (json && !jsonLines && maxEvents is 0)
+        {
+            throw new ArgumentException("--json stream-alarms requires --max-events to bound aggregate output.");
+        }
+
+        if (maxEvents > MaxAggregateEvents)
+        {
+            throw new ArgumentException($"--max-events cannot exceed {MaxAggregateEvents}.");
+        }
+
+        var messages = json && !jsonLines
+            ? new List<AlarmFeedMessage>(checked((int)maxEvents))
+            : [];
+        uint messageCount = 0;
+        var request = new StreamAlarmsRequest
+        {
+            ClientCorrelationId = CreateCorrelationId(),
+            AlarmFilterPrefix = arguments.GetOptional("filter-prefix") ?? string.Empty,
+        };
+
+        try
+        {
+            await foreach (AlarmFeedMessage feedMessage in client.StreamAlarmsAsync(request, cancellationToken)
+                .WithCancellation(cancellationToken)
+                .ConfigureAwait(false))
+            {
+                if (jsonLines)
+                {
+                    output.WriteLine(ProtobufJsonFormatter.Format(feedMessage));
+                }
+                else if (json)
+                {
+                    messages.Add(feedMessage);
+                }
+                else
+                {
+                    output.WriteLine(FormatAlarmFeedMessage(feedMessage));
+                }
+
+                messageCount++;
+                if (maxEvents > 0 && messageCount >= maxEvents)
+                {
+                    break;
+                }
+            }
+        }
+        catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+        {
+            // Mirrors stream-events (Client.Dotnet-017): the supplied token covers
+            // the user's --timeout wall-clock budget and external Ctrl+C / parent
+            // CTS cancellation. All are graceful completion modes for a
+            // finite-window alarm-feed collector: emit what arrived and exit 0.
+        }
+
+        if (json && !jsonLines)
+        {
+            output.WriteLine(JsonSerializer.Serialize(
+                new { alarms = messages.Select(AlarmFeedMessageToJsonElement).ToArray() },
+                JsonOptions));
+        }
+
+        return 0;
+    }
+
+    private static Task<int> AcknowledgeAlarmAsync(
+        CliArguments arguments,
+        IMxGatewayCliClient client,
+        TextWriter output,
+        CancellationToken cancellationToken)
+    {
+        var request = new AcknowledgeAlarmRequest
+        {
+            ClientCorrelationId = CreateCorrelationId(),
+            AlarmFullReference = arguments.GetRequired("reference"),
+            Comment = arguments.GetOptional("comment") ?? string.Empty,
+            OperatorUser = arguments.GetOptional("operator") ?? string.Empty,
+        };
+
+        return WriteReplyAsync(
+            client.AcknowledgeAlarmAsync(request, cancellationToken),
+            arguments,
+            output);
+    }
+
+    /// <summary>
+    /// Renders one <see cref="AlarmFeedMessage"/> for the human-readable
+    /// (non-JSON) stream-alarms output, distinguishing the <c>payload</c> oneof
+    /// arms: a snapshot active alarm, the snapshot-complete sentinel, or a live
+    /// transition.
+    /// </summary>
+    private static string FormatAlarmFeedMessage(AlarmFeedMessage feedMessage)
+    {
+        return feedMessage.PayloadCase switch
+        {
+            AlarmFeedMessage.PayloadOneofCase.ActiveAlarm =>
+                $"active-alarm {ProtobufJsonFormatter.Format(feedMessage.ActiveAlarm)}",
+            AlarmFeedMessage.PayloadOneofCase.SnapshotComplete =>
+                $"snapshot-complete {feedMessage.SnapshotComplete}",
+            AlarmFeedMessage.PayloadOneofCase.Transition =>
+                $"transition {ProtobufJsonFormatter.Format(feedMessage.Transition)}",
+            _ => $"unknown-payload {feedMessage.PayloadCase}",
+        };
+    }
+
+    private static JsonElement AlarmFeedMessageToJsonElement(AlarmFeedMessage feedMessage)
+    {
+        return JsonDocument.Parse(ProtobufJsonFormatter.Format(feedMessage)).RootElement.Clone();
+    }
+
     private static async Task<int> SmokeAsync(
         CliArguments arguments,
         IMxGatewayCliClient client,
@@ -1908,6 +2030,8 @@ public static class MxGatewayClientCli
             or "bench-read-bulk"
             or "bench-stream-events"
             or "stream-events"
+            or "stream-alarms"
+            or "acknowledge-alarm"
             or "write"
             or "write2"
             or "smoke"
@@ -1966,6 +2090,8 @@ public static class MxGatewayClientCli
         writer.WriteLine("mxgw-dotnet subscribe-bulk --session-id <id> --server-handle <n> --items <ref,ref> [--json]");
         writer.WriteLine("mxgw-dotnet unsubscribe-bulk --session-id <id> --server-handle <n> --item-handles <n,n> [--json]");
         writer.WriteLine("mxgw-dotnet stream-events --session-id <id> [--max-events <n>] [--json]");
+        writer.WriteLine("mxgw-dotnet stream-alarms [--filter-prefix <ref>] [--max-events <n>] [--json] [--jsonl]");
+        writer.WriteLine("mxgw-dotnet acknowledge-alarm --reference <ref> [--comment <text>] [--operator <user>] [--json]");
         writer.WriteLine("mxgw-dotnet write --session-id <id> --server-handle <n> --item-handle <n> --type <type> --value <value> [--json]");
         writer.WriteLine("mxgw-dotnet write2 --session-id <id> --server-handle <n> --item-handle <n> --type <type> --value <value> [--timestamp <iso>] [--json]");
         writer.WriteLine("mxgw-dotnet smoke --item <ref> [--value <value> --type <type>] [--json]");

clients/dotnet/MxGateway.Client.Tests/MxGatewayClientCliTests.cs

@@ -248,6 +248,87 @@ public sealed class MxGatewayClientCliTests
     }
 
 
+    /// <summary>Verifies that stream-alarms with --max-events stops output and distinguishes payload cases.</summary>
+    [Fact]
+    public async Task RunAsync_StreamAlarms_WithMaxEventsStopsAndDistinguishesPayloadCases()
+    {
+        using var output = new StringWriter();
+        using var error = new StringWriter();
+        FakeCliClient fakeClient = new();
+        fakeClient.AlarmFeedMessages.Add(new AlarmFeedMessage
+        {
+            ActiveAlarm = new ActiveAlarmSnapshot { AlarmFullReference = "Tank01.Level.HiHi" },
+        });
+        fakeClient.AlarmFeedMessages.Add(new AlarmFeedMessage { SnapshotComplete = true });
+
+        int exitCode = await MxGatewayClientCli.RunAsync(
+            [
+                "stream-alarms",
+                "--endpoint",
+                "http://localhost:5000",
+                "--api-key",
+                "test-api-key",
+                "--filter-prefix",
+                "Tank01",
+                "--max-events",
+                "1",
+            ],
+            output,
+            error,
+            _ => fakeClient);
+
+        Assert.Equal(0, exitCode);
+        StreamAlarmsRequest request = Assert.Single(fakeClient.StreamAlarmsRequests);
+        Assert.Equal("Tank01", request.AlarmFilterPrefix);
+        string text = output.ToString();
+        Assert.Contains("active-alarm", text);
+        Assert.Contains("Tank01.Level.HiHi", text);
+        Assert.DoesNotContain("snapshot-complete", text);
+        Assert.Equal(string.Empty, error.ToString());
+    }
+
+    /// <summary>Verifies that acknowledge-alarm builds a request and prints the JSON reply.</summary>
+    [Fact]
+    public async Task RunAsync_AcknowledgeAlarm_BuildsRequestAndPrintsJsonReply()
+    {
+        using var output = new StringWriter();
+        using var error = new StringWriter();
+        FakeCliClient fakeClient = new();
+        fakeClient.AcknowledgeAlarmReplies.Enqueue(new AcknowledgeAlarmReply
+        {
+            CorrelationId = "ack-fixture",
+            ProtocolStatus = new ProtocolStatus { Code = ProtocolStatusCode.Ok },
+            Hresult = 0,
+        });
+
+        int exitCode = await MxGatewayClientCli.RunAsync(
+            [
+                "acknowledge-alarm",
+                "--endpoint",
+                "http://localhost:5000",
+                "--api-key",
+                "test-api-key",
+                "--reference",
+                "Tank01.Level.HiHi",
+                "--comment",
+                "ack from cli",
+                "--operator",
+                "operator1",
+                "--json",
+            ],
+            output,
+            error,
+            _ => fakeClient);
+
+        Assert.Equal(0, exitCode);
+        AcknowledgeAlarmRequest request = Assert.Single(fakeClient.AcknowledgeAlarmRequests);
+        Assert.Equal("Tank01.Level.HiHi", request.AlarmFullReference);
+        Assert.Equal("ack from cli", request.Comment);
+        Assert.Equal("operator1", request.OperatorUser);
+        Assert.Contains("ack-fixture", output.ToString());
+        Assert.Equal(string.Empty, error.ToString());
+    }
+
     /// <summary>Verifies that smoke command closes opened session when a command fails.</summary>
     [Fact]
     public async Task RunAsync_Smoke_WhenCommandFails_ClosesOpenedSession()
@@ -695,6 +776,41 @@ public sealed class MxGatewayClientCliTests
             }
         }
 
+        /// <summary>Queue of acknowledge-alarm replies to return.</summary>
+        public Queue<AcknowledgeAlarmReply> AcknowledgeAlarmReplies { get; } = new();
+
+        /// <summary>List of received acknowledge-alarm requests.</summary>
+        public List<AcknowledgeAlarmRequest> AcknowledgeAlarmRequests { get; } = [];
+
+        /// <summary>List of received stream-alarms requests.</summary>
+        public List<StreamAlarmsRequest> StreamAlarmsRequests { get; } = [];
+
+        /// <summary>List of alarm feed messages to yield when streaming alarms.</summary>
+        public List<AlarmFeedMessage> AlarmFeedMessages { get; } = [];
+
+        /// <inheritdoc />
+        public Task<AcknowledgeAlarmReply> AcknowledgeAlarmAsync(
+            AcknowledgeAlarmRequest request,
+            CancellationToken cancellationToken)
+        {
+            AcknowledgeAlarmRequests.Add(request);
+            return Task.FromResult(AcknowledgeAlarmReplies.Dequeue());
+        }
+
+        /// <inheritdoc />
+        public async IAsyncEnumerable<AlarmFeedMessage> StreamAlarmsAsync(
+            StreamAlarmsRequest request,
+            [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken cancellationToken)
+        {
+            StreamAlarmsRequests.Add(request);
+            foreach (AlarmFeedMessage feedMessage in AlarmFeedMessages)
+            {
+                cancellationToken.ThrowIfCancellationRequested();
+                await Task.Yield();
+                yield return feedMessage;
+            }
+        }
+
         /// <summary>Galaxy test connection reply to return.</summary>
         public TestConnectionReply GalaxyTestConnectionReply { get; set; } = new() { Ok = true };
 

clients/go/cmd/mxgw-go/main.go

@@ -107,6 +107,10 @@ func runWithIO(ctx context.Context, args []string, stdout, stderr io.Writer) err
 		return runWrite(ctx, args[1:], stdout, stderr)
 	case "stream-events":
 		return runStreamEvents(ctx, args[1:], stdout, stderr)
+	case "stream-alarms":
+		return runStreamAlarms(ctx, args[1:], stdout, stderr)
+	case "acknowledge-alarm":
+		return runAcknowledgeAlarm(ctx, args[1:], stdout, stderr)
 	case "smoke":
 		return runSmoke(ctx, args[1:], stdout, stderr)
 	case "galaxy-test-connection":
@@ -816,6 +820,119 @@ func runStreamEvents(ctx context.Context, args []string, stdout, stderr io.Write
 	return nil
 }
 
+func runStreamAlarms(ctx context.Context, args []string, stdout, stderr io.Writer) error {
+	flags := flag.NewFlagSet("stream-alarms", flag.ContinueOnError)
+	flags.SetOutput(stderr)
+	common := bindCommonFlags(flags)
+	jsonOutput := flags.Bool("json", false, "write JSON output")
+	filterPrefix := flags.String("filter-prefix", "", "alarm-reference prefix scoping the feed; empty means unscoped")
+	limit := flags.Int("limit", 0, "maximum feed messages to read; 0 means unbounded")
+
+	if err := flags.Parse(args); err != nil {
+		return err
+	}
+
+	client, _, err := dialForCommand(ctx, common)
+	if err != nil {
+		return err
+	}
+	defer client.Close()
+
+	// Mirror runStreamEvents so Ctrl+C on a long-running stream-alarms command
+	// cancels the gRPC stream cleanly (the gateway sees codes.Canceled rather
+	// than a torn TCP connection) and the deferred client.Close() actually runs.
+	signalCtx, stopSignals := signal.NotifyContext(ctx, os.Interrupt, syscall.SIGTERM)
+	defer stopSignals()
+
+	streamCtx, cancelStream := context.WithCancel(signalCtx)
+	defer cancelStream()
+	stream, err := client.StreamAlarms(streamCtx, &mxgateway.StreamAlarmsRequest{AlarmFilterPrefix: *filterPrefix})
+	if err != nil {
+		return err
+	}
+
+	count := 0
+	for {
+		message, err := stream.Recv()
+		if errors.Is(err, io.EOF) {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		if *jsonOutput {
+			fmt.Fprintln(stdout, string(mustMarshalProto(message)))
+		} else {
+			fmt.Fprintln(stdout, formatAlarmFeedMessage(message))
+		}
+		count++
+		if *limit > 0 && count >= *limit {
+			cancelStream()
+			return nil
+		}
+	}
+}
+
+// formatAlarmFeedMessage renders one AlarmFeedMessage in the CLI's plain-text
+// output style, distinguishing the active-alarm snapshot, snapshot-complete
+// sentinel, and transition cases of the message's payload oneof.
+func formatAlarmFeedMessage(message *mxgateway.AlarmFeedMessage) string {
+	switch {
+	case message.GetActiveAlarm() != nil:
+		alarm := message.GetActiveAlarm()
+		return fmt.Sprintf("active-alarm %s state=%s severity=%d", alarm.GetAlarmFullReference(), alarm.GetCurrentState(), alarm.GetSeverity())
+	case message.GetSnapshotComplete():
+		return "snapshot-complete"
+	case message.GetTransition() != nil:
+		transition := message.GetTransition()
+		return fmt.Sprintf("transition %s kind=%s severity=%d", transition.GetAlarmFullReference(), transition.GetTransitionKind(), transition.GetSeverity())
+	default:
+		return "unknown"
+	}
+}
+
+func runAcknowledgeAlarm(ctx context.Context, args []string, stdout, stderr io.Writer) error {
+	flags := flag.NewFlagSet("acknowledge-alarm", flag.ContinueOnError)
+	flags.SetOutput(stderr)
+	common := bindCommonFlags(flags)
+	jsonOutput := flags.Bool("json", false, "write JSON output")
+	reference := flags.String("reference", "", "full alarm reference to acknowledge")
+	comment := flags.String("comment", "", "operator acknowledge comment")
+	operator := flags.String("operator", "", "operator user performing the acknowledge")
+
+	if err := flags.Parse(args); err != nil {
+		return err
+	}
+	if *reference == "" {
+		return errors.New("reference is required")
+	}
+
+	client, options, err := dialForCommand(ctx, common)
+	if err != nil {
+		return err
+	}
+	defer client.Close()
+
+	reply, err := client.AcknowledgeAlarm(ctx, &mxgateway.AcknowledgeAlarmRequest{
+		AlarmFullReference: *reference,
+		Comment:            *comment,
+		OperatorUser:       *operator,
+	})
+	if err != nil {
+		return err
+	}
+	if *jsonOutput {
+		return writeJSON(stdout, commandReplyOutput{
+			Command: "acknowledge-alarm",
+			Options: options,
+			Reply:   mustMarshalProto(reply),
+		})
+	}
+
+	fmt.Fprintln(stdout, reply.GetHresult())
+	return nil
+}
+
 func runSmoke(ctx context.Context, args []string, stdout, stderr io.Writer) error {
 	flags := flag.NewFlagSet("smoke", flag.ContinueOnError)
 	flags.SetOutput(stderr)
@@ -1120,7 +1237,7 @@ func runBatch(ctx context.Context, in io.Reader, stdout, stderr io.Writer) error
 }
 
 func writeUsage(writer io.Writer) {
-	fmt.Fprintln(writer, "usage: mxgw-go <version|open-session|close-session|register|add-item|advise|subscribe-bulk|unsubscribe-bulk|read-bulk|write-bulk|write2-bulk|write-secured-bulk|write-secured2-bulk|bench-read-bulk|write|stream-events|smoke|galaxy-test-connection|galaxy-last-deploy|galaxy-discover|galaxy-watch|batch>")
+	fmt.Fprintln(writer, "usage: mxgw-go <version|open-session|close-session|register|add-item|advise|subscribe-bulk|unsubscribe-bulk|read-bulk|write-bulk|write2-bulk|write-secured-bulk|write-secured2-bulk|bench-read-bulk|write|stream-events|stream-alarms|acknowledge-alarm|smoke|galaxy-test-connection|galaxy-last-deploy|galaxy-discover|galaxy-watch|batch>")
 }
 
 func dialGalaxyForCommand(ctx context.Context, common *commonOptions) (*mxgateway.GalaxyClient, commonOptions, error) {

clients/java/mxgateway-cli/src/main/java/com/dohertylan/mxgateway/cli/MxGatewayCli.java

@@ -3,6 +3,7 @@ package com.dohertylan.mxgateway.cli;
 import com.dohertylan.mxgateway.client.DeployEventStream;
 import com.dohertylan.mxgateway.client.GalaxyRepositoryClient;
 import com.dohertylan.mxgateway.client.MxEventStream;
+import com.dohertylan.mxgateway.client.MxGatewayAlarmFeedSubscription;
 import com.dohertylan.mxgateway.client.MxGatewayClient;
 import com.dohertylan.mxgateway.client.MxGatewayClientOptions;
 import com.dohertylan.mxgateway.client.MxGatewayClientVersion;
@@ -28,14 +29,23 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.Callable;
+import io.grpc.stub.StreamObserver;
+import mxaccess_gateway.v1.MxaccessGateway.AcknowledgeAlarmReply;
+import mxaccess_gateway.v1.MxaccessGateway.AcknowledgeAlarmRequest;
+import mxaccess_gateway.v1.MxaccessGateway.ActiveAlarmSnapshot;
+import mxaccess_gateway.v1.MxaccessGateway.AlarmFeedMessage;
 import mxaccess_gateway.v1.MxaccessGateway.BulkReadResult;
 import mxaccess_gateway.v1.MxaccessGateway.BulkWriteResult;
 import mxaccess_gateway.v1.MxaccessGateway.CloseSessionRequest;
 import mxaccess_gateway.v1.MxaccessGateway.MxCommandReply;
 import mxaccess_gateway.v1.MxaccessGateway.MxEvent;
 import mxaccess_gateway.v1.MxaccessGateway.MxValue;
+import mxaccess_gateway.v1.MxaccessGateway.OnAlarmTransitionEvent;
 import mxaccess_gateway.v1.MxaccessGateway.OpenSessionRequest;
+import mxaccess_gateway.v1.MxaccessGateway.StreamAlarmsRequest;
 import mxaccess_gateway.v1.MxaccessGateway.SubscribeResult;
 import mxaccess_gateway.v1.MxaccessGateway.Write2BulkEntry;
 import mxaccess_gateway.v1.MxaccessGateway.WriteBulkEntry;
@@ -127,6 +137,8 @@ public final class MxGatewayCli implements Callable<Integer> {
         commandLine.addSubcommand("bench-read-bulk", new BenchReadBulkCommand(clientFactory));
         commandLine.addSubcommand("write", new WriteCommand(clientFactory));
         commandLine.addSubcommand("stream-events", new StreamEventsCommand(clientFactory));
+        commandLine.addSubcommand("stream-alarms", new StreamAlarmsCommand(clientFactory));
+        commandLine.addSubcommand("acknowledge-alarm", new AcknowledgeAlarmCommand(clientFactory));
         commandLine.addSubcommand("smoke", new SmokeCommand(clientFactory));
         commandLine.addSubcommand("galaxy-test", new GalaxyTestConnectionCommand());
         commandLine.addSubcommand("galaxy-deploy-time", new GalaxyDeployTimeCommand());
@@ -139,6 +151,9 @@ public final class MxGatewayCli implements Callable<Integer> {
     /** Sentinel written to stdout after every command result in batch mode. */
     static final String BATCH_EOR = "__MXGW_BATCH_EOR__";
 
+    /** Sentinel queued by {@code stream-alarms} to mark a clean end of the alarm feed. */
+    private static final Object ALARM_FEED_END = new Object();
+
     /**
      * Reads one CLI invocation per stdin line, executes each via a fresh
      * {@link CommandLine}, and writes {@value #BATCH_EOR} to stdout after
@@ -1155,6 +1170,115 @@ public final class MxGatewayCli implements Callable<Integer> {
         }
     }
 
+    @Command(name = "stream-alarms", description = "Streams the gateway central alarm feed.")
+    static final class StreamAlarmsCommand extends GatewayCommand {
+        @Option(names = "--filter-prefix", description = "Alarm-reference prefix scoping the feed; empty means unscoped.")
+        String filterPrefix = "";
+
+        @Option(names = "--limit", defaultValue = "0", description = "Maximum feed messages to print.")
+        int limit;
+
+        StreamAlarmsCommand(MxGatewayCliClientFactory clientFactory) {
+            super(clientFactory);
+        }
+
+        @Override
+        public Integer call() {
+            try (MxGatewayCliClient client = clientFactory.connect(common.resolved())) {
+                // The async alarm feed delivers on a background gRPC thread; buffer
+                // messages in a bounded queue and drain them on this thread so the
+                // --limit termination mirrors stream-events. 1024 absorbs the
+                // gateway's initial active-alarm snapshot burst.
+                BlockingQueue<Object> queue = new ArrayBlockingQueue<>(1024);
+                StreamAlarmsRequest request = StreamAlarmsRequest.newBuilder()
+                        .setAlarmFilterPrefix(filterPrefix)
+                        .build();
+                MxGatewayAlarmFeedSubscription subscription =
+                        client.streamAlarms(request, new StreamObserver<>() {
+                            @Override
+                            public void onNext(AlarmFeedMessage value) {
+                                queue.offer(value);
+                            }
+
+                            @Override
+                            public void onError(Throwable error) {
+                                queue.offer(error);
+                            }
+
+                            @Override
+                            public void onCompleted() {
+                                queue.offer(ALARM_FEED_END);
+                            }
+                        });
+                try {
+                    int count = 0;
+                    while (true) {
+                        Object item = queue.take();
+                        if (item == ALARM_FEED_END) {
+                            break;
+                        }
+                        if (item instanceof Throwable error) {
+                            throw new IllegalStateException(
+                                    "gateway stream alarms failed: " + error.getMessage(), error);
+                        }
+                        AlarmFeedMessage message = (AlarmFeedMessage) item;
+                        if (json) {
+                            client.out().println(protoJson(message));
+                        } else {
+                            client.out().println(formatAlarmFeedMessage(message));
+                        }
+                        client.out().flush();
+                        count++;
+                        if (limit > 0 && count >= limit) {
+                            subscription.cancel();
+                            break;
+                        }
+                    }
+                } catch (InterruptedException error) {
+                    Thread.currentThread().interrupt();
+                    subscription.cancel();
+                } finally {
+                    subscription.cancel();
+                }
+            }
+            return 0;
+        }
+    }
+
+    @Command(name = "acknowledge-alarm", description = "Acknowledges an active MXAccess alarm.")
+    static final class AcknowledgeAlarmCommand extends GatewayCommand {
+        @Option(names = "--reference", required = true, description = "Full alarm reference to acknowledge.")
+        String reference;
+
+        @Option(names = "--comment", description = "Operator acknowledge comment.")
+        String comment = "";
+
+        @Option(names = "--operator", description = "Operator user performing the acknowledge.")
+        String operator = "";
+
+        AcknowledgeAlarmCommand(MxGatewayCliClientFactory clientFactory) {
+            super(clientFactory);
+        }
+
+        @Override
+        public Integer call() {
+            try (MxGatewayCliClient client = clientFactory.connect(common.resolved())) {
+                AcknowledgeAlarmReply reply = client.acknowledgeAlarm(AcknowledgeAlarmRequest.newBuilder()
+                        .setAlarmFullReference(reference)
+                        .setComment(comment)
+                        .setOperatorUser(operator)
+                        .build());
+                writeOutput(
+                        "acknowledge-alarm",
+                        common,
+                        json,
+                        reply,
+                        () -> Integer.toString(reply.getHresult()));
+            }
+            return 0;
+        }
+    }
+
     @Command(name = "smoke", description = "Runs a bounded open/register/add/advise flow.")
     static final class SmokeCommand extends GatewayCommand {
         @Option(names = "--client-name", defaultValue = "mxgw-java-smoke", description = "MXAccess client name.")
@@ -1329,6 +1453,11 @@ public final class MxGatewayCli implements Callable<Integer> {
 
         MxGatewayCliSession session(String sessionId);
 
+        AcknowledgeAlarmReply acknowledgeAlarm(AcknowledgeAlarmRequest request);
+
+        MxGatewayAlarmFeedSubscription streamAlarms(
+                StreamAlarmsRequest request, StreamObserver<AlarmFeedMessage> observer);
+
         @Override
         void close();
     }
@@ -1401,6 +1530,17 @@ public final class MxGatewayCli implements Callable<Integer> {
             return new GrpcMxGatewayCliSession(MxGatewaySession.forSessionId(client, sessionId));
         }
 
+        @Override
+        public AcknowledgeAlarmReply acknowledgeAlarm(AcknowledgeAlarmRequest request) {
+            return client.acknowledgeAlarm(request);
+        }
+
+        @Override
+        public MxGatewayAlarmFeedSubscription streamAlarms(
+                StreamAlarmsRequest request, StreamObserver<AlarmFeedMessage> observer) {
+            return client.streamAlarms(request, observer);
+        }
+
         @Override
         public void close() {
             client.close();
@@ -1576,6 +1716,32 @@ public final class MxGatewayCli implements Callable<Integer> {
         return values;
     }
 
+    /**
+     * Renders one {@link AlarmFeedMessage} in the CLI's plain-text output
+     * style, distinguishing the active-alarm snapshot, snapshot-complete
+     * sentinel, and transition cases of the message's {@code payload} oneof.
+     */
+    private static String formatAlarmFeedMessage(AlarmFeedMessage message) {
+        return switch (message.getPayloadCase()) {
+            case ACTIVE_ALARM -> {
+                ActiveAlarmSnapshot alarm = message.getActiveAlarm();
+                yield String.format(
+                        "active-alarm %s state=%s severity=%d",
+                        alarm.getAlarmFullReference(), alarm.getCurrentState().name(), alarm.getSeverity());
+            }
+            case SNAPSHOT_COMPLETE -> "snapshot-complete";
+            case TRANSITION -> {
+                OnAlarmTransitionEvent transition = message.getTransition();
+                yield String.format(
+                        "transition %s kind=%s severity=%d",
+                        transition.getAlarmFullReference(),
+                        transition.getTransitionKind().name(),
+                        transition.getSeverity());
+            }
+            case PAYLOAD_NOT_SET -> "unknown";
+        };
+    }
+
     private static MxValue parseValue(String type, String text) {
         return switch (type) {
             case "bool" -> MxValues.boolValue(Boolean.parseBoolean(text));

clients/java/mxgateway-cli/src/test/java/com/dohertylan/mxgateway/cli/MxGatewayCliTests.java

@@ -8,10 +8,18 @@ import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import com.dohertylan.mxgateway.client.MxGatewayAlarmFeedSubscription;
+import io.grpc.stub.StreamObserver;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.List;
+import mxaccess_gateway.v1.MxaccessGateway.AcknowledgeAlarmReply;
+import mxaccess_gateway.v1.MxaccessGateway.AcknowledgeAlarmRequest;
+import mxaccess_gateway.v1.MxaccessGateway.ActiveAlarmSnapshot;
 import mxaccess_gateway.v1.MxaccessGateway.AddItemReply;
+import mxaccess_gateway.v1.MxaccessGateway.AlarmConditionState;
+import mxaccess_gateway.v1.MxaccessGateway.AlarmFeedMessage;
+import mxaccess_gateway.v1.MxaccessGateway.AlarmTransitionKind;
 import mxaccess_gateway.v1.MxaccessGateway.BulkReadResult;
 import mxaccess_gateway.v1.MxaccessGateway.BulkWriteResult;
 import mxaccess_gateway.v1.MxaccessGateway.CloseSessionReply;
@@ -20,9 +28,11 @@ import mxaccess_gateway.v1.MxaccessGateway.MxCommandKind;
 import mxaccess_gateway.v1.MxaccessGateway.MxCommandReply;
 import mxaccess_gateway.v1.MxaccessGateway.MxEvent;
 import mxaccess_gateway.v1.MxaccessGateway.MxValue;
+import mxaccess_gateway.v1.MxaccessGateway.OnAlarmTransitionEvent;
 import mxaccess_gateway.v1.MxaccessGateway.OpenSessionReply;
 import mxaccess_gateway.v1.MxaccessGateway.OpenSessionRequest;
 import mxaccess_gateway.v1.MxaccessGateway.ProtocolStatus;
+import mxaccess_gateway.v1.MxaccessGateway.StreamAlarmsRequest;
 import mxaccess_gateway.v1.MxaccessGateway.ProtocolStatusCode;
 import mxaccess_gateway.v1.MxaccessGateway.RegisterReply;
 import mxaccess_gateway.v1.MxaccessGateway.SessionState;
@@ -389,6 +399,70 @@ final class MxGatewayCliTests {
         assertTrue(output.contains("TestMachine_002.TestChangingInt"), output);
     }
 
+    // ---- stream-alarms / acknowledge-alarm subcommands ----
+
+    @Test
+    void streamAlarmsCommandForwardsFilterPrefixAndPrintsFeedMessages() {
+        FakeClientFactory factory = new FakeClientFactory();
+        CliRun run = execute(factory, "stream-alarms", "--filter-prefix", "Tank01");
+
+        assertEquals(0, run.exitCode());
+        assertEquals("Tank01", factory.client.lastStreamAlarmsRequest.getAlarmFilterPrefix());
+        String out = run.output();
+        assertTrue(out.contains("active-alarm Tank01.Level.HiHi"), out);
+        assertTrue(out.contains("snapshot-complete"), out);
+        assertTrue(out.contains("transition Tank01.Level.HiHi"), out);
+    }
+
+    @Test
+    void streamAlarmsCommandHonoursLimit() {
+        FakeClientFactory factory = new FakeClientFactory();
+        CliRun run = execute(factory, "stream-alarms", "--limit", "1");
+
+        assertEquals(0, run.exitCode());
+        long lines = run.output().lines().filter(line -> !line.isBlank()).count();
+        assertEquals(1, lines, "expected exactly one feed message with --limit 1, got: " + run.output());
+    }
+
+    @Test
+    void streamAlarmsCommandPrintsJson() {
+        FakeClientFactory factory = new FakeClientFactory();
+        CliRun run = execute(factory, "stream-alarms", "--json");
+
+        assertEquals(0, run.exitCode());
+        assertTrue(run.output().contains("\"activeAlarm\""), run.output());
+        assertTrue(run.output().contains("\"snapshotComplete\""), run.output());
+    }
+
+    @Test
+    void acknowledgeAlarmCommandForwardsOptionsAndPrintsReply() {
+        FakeClientFactory factory = new FakeClientFactory();
+        CliRun run = execute(
+                factory,
+                "acknowledge-alarm",
+                "--reference",
+                "Tank01.Level.HiHi",
+                "--comment",
+                "checked",
+                "--operator",
+                "operator1",
+                "--json");
+
+        assertEquals(0, run.exitCode());
+        assertEquals("Tank01.Level.HiHi", factory.client.lastAcknowledgeAlarmRequest.getAlarmFullReference());
+        assertEquals("checked", factory.client.lastAcknowledgeAlarmRequest.getComment());
+        assertEquals("operator1", factory.client.lastAcknowledgeAlarmRequest.getOperatorUser());
+        assertTrue(run.output().contains("\"command\":\"acknowledge-alarm\""), run.output());
+    }
+
+    @Test
+    void acknowledgeAlarmCommandRequiresReference() {
+        CliRun run = execute(new FakeClientFactory(), "acknowledge-alarm", "--comment", "checked");
+
+        assertFalse(run.exitCode() == 0, "expected non-zero exit without --reference");
+        assertTrue(run.errors().contains("--reference"), run.errors());
+    }
+
     // ---- Client.Java-027: batch subcommand ----
 
     @Test
@@ -501,6 +575,8 @@ final class MxGatewayCliTests {
         private final PrintWriter out;
         private final FakeSession session = new FakeSession();
         private boolean closeCalled;
+        private AcknowledgeAlarmRequest lastAcknowledgeAlarmRequest;
+        private StreamAlarmsRequest lastStreamAlarmsRequest;
 
         private FakeClient(PrintWriter out) {
             this.out = out;
@@ -534,6 +610,40 @@ final class MxGatewayCliTests {
             return session;
         }
 
+        @Override
+        public AcknowledgeAlarmReply acknowledgeAlarm(AcknowledgeAlarmRequest request) {
+            lastAcknowledgeAlarmRequest = request;
+            return AcknowledgeAlarmReply.newBuilder()
+                    .setCorrelationId(request.getClientCorrelationId())
+                    .setProtocolStatus(ok())
+                    .setHresult(0)
+                    .build();
+        }
+
+        @Override
+        public MxGatewayAlarmFeedSubscription streamAlarms(
+                StreamAlarmsRequest request, StreamObserver<AlarmFeedMessage> observer) {
+            lastStreamAlarmsRequest = request;
+            // Replay a deterministic active-alarm snapshot, snapshot-complete
+            // sentinel, transition, then complete the feed so the CLI command
+            // drains a bounded stream without contacting a live gateway.
+            observer.onNext(AlarmFeedMessage.newBuilder()
+                    .setActiveAlarm(ActiveAlarmSnapshot.newBuilder()
+                            .setAlarmFullReference("Tank01.Level.HiHi")
+                            .setCurrentState(AlarmConditionState.ALARM_CONDITION_STATE_ACTIVE)
+                            .setSeverity(700))
+                    .build());
+            observer.onNext(AlarmFeedMessage.newBuilder().setSnapshotComplete(true).build());
+            observer.onNext(AlarmFeedMessage.newBuilder()
+                    .setTransition(OnAlarmTransitionEvent.newBuilder()
+                            .setAlarmFullReference("Tank01.Level.HiHi")
+                            .setTransitionKind(AlarmTransitionKind.ALARM_TRANSITION_KIND_ACKNOWLEDGE)
+                            .setSeverity(700))
+                    .build());
+            observer.onCompleted();
+            return new MxGatewayAlarmFeedSubscription();
+        }
+
         @Override
         public void close() {
         }

clients/rust/crates/mxgw-cli/src/main.rs

@@ -18,8 +18,9 @@ use clap::{Args, Parser, Subcommand, ValueEnum};
 use futures_util::StreamExt;
 use mxgateway_client::generated::galaxy_repository::v1::DeployEvent;
 use mxgateway_client::generated::mxaccess_gateway::v1::{
-    CloseSessionRequest, MxCommand, MxCommandKind, MxCommandRequest, MxEvent, MxEventFamily,
+    alarm_feed_message, AcknowledgeAlarmRequest, AlarmFeedMessage, CloseSessionRequest, MxCommand,
-    MxValue as ProtoMxValue, OpenSessionRequest, PingCommand, StreamEventsRequest, Write2BulkEntry,
+    MxCommandKind, MxCommandRequest, MxEvent, MxEventFamily, MxValue as ProtoMxValue,
+    OpenSessionRequest, PingCommand, StreamAlarmsRequest, StreamEventsRequest, Write2BulkEntry,
     WriteBulkEntry, WriteSecured2BulkEntry, WriteSecuredBulkEntry,
 };
 use mxgateway_client::{
@@ -272,6 +273,24 @@ enum Command {
         #[arg(long)]
         jsonl: bool,
     },
+    /// Attach to the gateway's session-less central alarm feed. The stream
+    /// opens with one `active_alarm` per currently-active alarm, then a
+    /// single `snapshot_complete`, then a `transition` for every subsequent
+    /// raise / acknowledge / clear.
+    StreamAlarms {
+        #[command(flatten)]
+        connection: ConnectionArgs,
+        /// Optional alarm-reference prefix scoping the feed to an equipment
+        /// sub-tree. Omit to stream every active alarm.
+        #[arg(long)]
+        filter_prefix: Option<String>,
+        #[arg(long, default_value_t = 1)]
+        max_events: usize,
+        #[arg(long)]
+        json: bool,
+        #[arg(long)]
+        jsonl: bool,
+    },
     Write {
         #[command(flatten)]
         connection: ConnectionArgs,
@@ -310,6 +329,20 @@ enum Command {
         #[arg(long)]
         json: bool,
     },
+    /// Acknowledge an active MXAccess alarm condition through the gateway's
+    /// session-less AcknowledgeAlarm RPC.
+    AcknowledgeAlarm {
+        #[command(flatten)]
+        connection: ConnectionArgs,
+        #[arg(long)]
+        reference: String,
+        #[arg(long, default_value = "")]
+        comment: String,
+        #[arg(long, default_value = "")]
+        operator: String,
+        #[arg(long)]
+        json: bool,
+    },
     Smoke {
         #[command(flatten)]
         connection: ConnectionArgs,
@@ -788,6 +821,52 @@ async fn dispatch(command: Command) -> Result<(), Error> {
                 println!("{}", json!({ "eventCount": event_count, "events": events }));
             }
         }
+        Command::StreamAlarms {
+            connection,
+            filter_prefix,
+            max_events,
+            json,
+            jsonl,
+        } => {
+            if max_events > MAX_AGGREGATE_EVENTS {
+                return Err(Error::InvalidArgument {
+                    name: "max-events".to_owned(),
+                    detail: format!("must be less than or equal to {MAX_AGGREGATE_EVENTS}"),
+                });
+            }
+
+            let client = connect(connection).await?;
+            let mut stream = client
+                .stream_alarms(StreamAlarmsRequest {
+                    client_correlation_id: mxgateway_client::next_correlation_id(
+                        "cli-stream-alarms",
+                    ),
+                    alarm_filter_prefix: filter_prefix.unwrap_or_default(),
+                })
+                .await?;
+            let mut messages: Vec<Value> = Vec::new();
+            let mut message_count = 0usize;
+            while message_count < max_events {
+                let Some(message) = stream.next().await else {
+                    break;
+                };
+                let message = message?;
+                message_count += 1;
+                if jsonl {
+                    println!("{}", alarm_feed_message_to_json(&message));
+                } else if json {
+                    messages.push(alarm_feed_message_to_json(&message));
+                } else {
+                    println!("{}", alarm_feed_message_summary(&message));
+                }
+            }
+            if json {
+                println!(
+                    "{}",
+                    json!({ "messageCount": message_count, "messages": messages })
+                );
+            }
+        }
         Command::Write {
             connection,
             session_id,
@@ -832,6 +911,26 @@ async fn dispatch(command: Command) -> Result<(), Error> {
                 .await?;
             print_ok("write2", json);
         }
+        Command::AcknowledgeAlarm {
+            connection,
+            reference,
+            comment,
+            operator,
+            json,
+        } => {
+            let client = connect(connection).await?;
+            let reply = client
+                .acknowledge_alarm(AcknowledgeAlarmRequest {
+                    client_correlation_id: mxgateway_client::next_correlation_id(
+                        "cli-acknowledge-alarm",
+                    ),
+                    alarm_full_reference: reference,
+                    comment,
+                    operator_user: operator,
+                })
+                .await?;
+            print_acknowledge_alarm_reply(&reply, json);
+        }
         Command::Galaxy(galaxy_command) => run_galaxy(galaxy_command).await?,
         Command::Smoke {
             connection,
@@ -1533,6 +1632,113 @@ fn print_deploy_event(event: &DeployEvent, use_json: bool) {
     }
 }
 
+/// Render a streamed [`AlarmFeedMessage`] as a terse one-line summary that
+/// distinguishes the three `payload` oneof cases.
+fn alarm_feed_message_summary(message: &AlarmFeedMessage) -> String {
+    match &message.payload {
+        Some(alarm_feed_message::Payload::ActiveAlarm(snapshot)) => {
+            format!(
+                "active-alarm {} state={}",
+                snapshot.alarm_full_reference,
+                AlarmEnumName::condition_state(snapshot.current_state)
+            )
+        }
+        Some(alarm_feed_message::Payload::SnapshotComplete(complete)) => {
+            format!("snapshot-complete {complete}")
+        }
+        Some(alarm_feed_message::Payload::Transition(transition)) => {
+            format!(
+                "transition {} kind={}",
+                transition.alarm_full_reference,
+                AlarmEnumName::transition_kind(transition.transition_kind)
+            )
+        }
+        None => "(empty)".to_owned(),
+    }
+}
+
+/// Render a streamed [`AlarmFeedMessage`] as a JSON object whose single
+/// top-level key names the active `payload` oneof case, mirroring the
+/// protobuf-JSON the .NET/Go/Java/Python CLIs emit.
+fn alarm_feed_message_to_json(message: &AlarmFeedMessage) -> Value {
+    match &message.payload {
+        Some(alarm_feed_message::Payload::ActiveAlarm(snapshot)) => json!({
+            "activeAlarm": {
+                "alarmFullReference": snapshot.alarm_full_reference,
+                "sourceObjectReference": snapshot.source_object_reference,
+                "alarmTypeName": snapshot.alarm_type_name,
+                "severity": snapshot.severity,
+                "currentState": AlarmEnumName::condition_state(snapshot.current_state),
+                "category": snapshot.category,
+                "description": snapshot.description,
+                "operatorUser": snapshot.operator_user,
+                "operatorComment": snapshot.operator_comment,
+            }
+        }),
+        Some(alarm_feed_message::Payload::SnapshotComplete(complete)) => json!({
+            "snapshotComplete": complete,
+        }),
+        Some(alarm_feed_message::Payload::Transition(transition)) => json!({
+            "transition": {
+                "alarmFullReference": transition.alarm_full_reference,
+                "sourceObjectReference": transition.source_object_reference,
+                "alarmTypeName": transition.alarm_type_name,
+                "transitionKind": AlarmEnumName::transition_kind(transition.transition_kind),
+                "severity": transition.severity,
+                "operatorUser": transition.operator_user,
+                "operatorComment": transition.operator_comment,
+                "category": transition.category,
+                "description": transition.description,
+            }
+        }),
+        None => Value::Null,
+    }
+}
+
+/// Tiny namespace for alarm-enum name lookups used by the alarm-feed
+/// renderers; keeps the proto-enum imports off the `main.rs` top level.
+struct AlarmEnumName;
+
+impl AlarmEnumName {
+    fn condition_state(value: i32) -> String {
+        use mxgateway_client::generated::mxaccess_gateway::v1::AlarmConditionState;
+        AlarmConditionState::try_from(value)
+            .map(|state| state.as_str_name().to_owned())
+            .unwrap_or_else(|_| value.to_string())
+    }
+
+    fn transition_kind(value: i32) -> String {
+        use mxgateway_client::generated::mxaccess_gateway::v1::AlarmTransitionKind;
+        AlarmTransitionKind::try_from(value)
+            .map(|kind| kind.as_str_name().to_owned())
+            .unwrap_or_else(|_| value.to_string())
+    }
+}
+
+/// Render an [`AcknowledgeAlarmReply`] as a terse line or a JSON document.
+fn print_acknowledge_alarm_reply(
+    reply: &mxgateway_client::generated::mxaccess_gateway::v1::AcknowledgeAlarmReply,
+    use_json: bool,
+) {
+    if use_json {
+        println!(
+            "{}",
+            json!({
+                "operation": "acknowledge-alarm",
+                "correlationId": reply.correlation_id,
+                "protocolStatus": reply.protocol_status.as_ref().map(|status| json!({
+                    "code": status.code,
+                    "message": status.message,
+                })),
+                "hresult": reply.hresult,
+                "diagnosticMessage": reply.diagnostic_message,
+            })
+        );
+    } else {
+        println!("acknowledge-alarm completed");
+    }
+}
+
 /// Render a streamed [`MxEvent`] as a JSON object. The scalar value is
 /// projected into protojson-style `*Value` keys so the cross-language e2e
 /// matrix can extract and compare event values uniformly across all five
@@ -1793,6 +1999,47 @@ mod tests {
         );
     }
 
+    #[test]
+    fn parses_stream_alarms_command() {
+        let parsed = Cli::try_parse_from([
+            "mxgw",
+            "stream-alarms",
+            "--filter-prefix",
+            "Tank01",
+            "--max-events",
+            "3",
+            "--json",
+        ]);
+        assert!(parsed.is_ok(), "parse failed: {parsed:?}");
+    }
+
+    #[test]
+    fn parses_stream_alarms_command_without_filter_prefix() {
+        let parsed = Cli::try_parse_from(["mxgw", "stream-alarms"]);
+        assert!(parsed.is_ok(), "parse failed: {parsed:?}");
+    }
+
+    #[test]
+    fn parses_acknowledge_alarm_command() {
+        let parsed = Cli::try_parse_from([
+            "mxgw",
+            "acknowledge-alarm",
+            "--reference",
+            "Tank01.Level.HiHi",
+            "--comment",
+            "ack from cli",
+            "--operator",
+            "operator1",
+        ]);
+        assert!(parsed.is_ok(), "parse failed: {parsed:?}");
+    }
+
+    #[test]
+    fn acknowledge_alarm_requires_reference() {
+        let parsed = Cli::try_parse_from(["mxgw", "acknowledge-alarm"]);
+        assert!(parsed.is_err());
+    }
+
     #[test]
     fn parses_galaxy_watch_command_with_last_seen_and_max_events() {
         let parsed = Cli::try_parse_from([