diff --git a/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/DeployCommands.cs b/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/DeployCommands.cs
index c6456564..39491a2c 100644
--- a/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/DeployCommands.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/DeployCommands.cs
@@ -89,7 +89,14 @@ public static class DeployCommands
     /// </summary>
     internal static readonly TimeSpan BulkDeployTimeout = Timeout.InfiniteTimeSpan;
 
-    internal static int HandleSiteDeploymentResponse(string json, string format)
+    /// <summary>
+    /// Renders a deployment summary and turns its <c>failureCount</c> into the exit code:
+    /// 0 when every site/instance succeeded, 1 when any failed. Shared by <c>deploy site</c>
+    /// and both artifact-deploy commands (<c>deploy artifacts</c>, <c>site deploy-artifacts</c>),
+    /// whose summaries all carry <c>failureCount</c> — a per-site failure is a successful HTTP
+    /// call, so without this the process exited 0 and scripts could not detect it.
+    /// </summary>
+    internal static int HandleSiteDeploymentResponse(string json, string format, string summaryName = "site deployment")
     {
         CommandHelpers.HandleResponse(new ManagementResponse(200, json, null, null), format);
         try
@@ -100,7 +107,7 @@ public static class DeployCommands
                 return count == 0 ? 0 : 1;
         }
         catch (JsonException) { }
-        OutputFormatter.WriteError("The server returned an invalid site deployment summary.", "INVALID_RESPONSE");
+        OutputFormatter.WriteError($"The server returned an invalid {summaryName} summary.", "INVALID_RESPONSE");
         return 1;
     }
 
@@ -113,7 +120,9 @@ public static class DeployCommands
         {
             var siteId = result.GetValue(siteIdOption);
             return await CommandHelpers.ExecuteCommandAsync(
-                result, urlOption, formatOption, usernameOption, passwordOption, new MgmtDeployArtifactsCommand(siteId));
+                result, urlOption, formatOption, usernameOption, passwordOption, new MgmtDeployArtifactsCommand(siteId),
+                onSuccess: json => HandleSiteDeploymentResponse(
+                    json, CommandHelpers.ResolveFormat(result, formatOption, CliConfig.Load()), "artifact deployment"));
         });
         return cmd;
     }
diff --git a/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/SiteCommands.cs b/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/SiteCommands.cs
index e026fe20..6c0a900f 100644
--- a/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/SiteCommands.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.CLI/Commands/SiteCommands.cs
@@ -222,8 +222,11 @@ public static class SiteCommands
         cmd.SetAction(async (ParseResult result) =>
         {
             var siteId = result.GetValue(siteIdOption);
+            // Exit 1 when any site failed (see DeployCommands.HandleSiteDeploymentResponse).
             return await CommandHelpers.ExecuteCommandAsync(
-                result, urlOption, formatOption, usernameOption, passwordOption, new MgmtDeployArtifactsCommand(siteId));
+                result, urlOption, formatOption, usernameOption, passwordOption, new MgmtDeployArtifactsCommand(siteId),
+                onSuccess: json => DeployCommands.HandleSiteDeploymentResponse(
+                    json, CommandHelpers.ResolveFormat(result, formatOption, CliConfig.Load()), "artifact deployment"));
         });
         return cmd;
     }
diff --git a/src/ZB.MOM.WW.ScadaBridge.CLI/README.md b/src/ZB.MOM.WW.ScadaBridge.CLI/README.md
index c3f144f4..8a76c6ac 100644
--- a/src/ZB.MOM.WW.ScadaBridge.CLI/README.md
+++ b/src/ZB.MOM.WW.ScadaBridge.CLI/README.md
@@ -965,6 +965,11 @@ scadabridge --url <url> site deploy-artifacts [--site-id <int>]
 |--------|----------|-------------|
 | `--site-id` | no | Target site ID; deploys system-wide artifacts to exactly that site. Omit to deploy fleet-wide to all sites. A site-scoped (non-Administrator) Deployer must supply an in-scope `--site-id`; fleet-wide deployment requires a system-wide Deployer or Administrator (arch-review C2). |
 
+Output is the per-site result matrix (`siteId`, `siteName`, `success`, `errorMessage`,
+`secretsDeployed`, `secretsRemoved`) plus `successCount` / `failureCount`. The command exits `1`
+when `failureCount` is non-zero — a site that failed (unreachable, a missing or unreadable
+secret, a partial secret apply) is a failed command even though the HTTP call succeeded.
+
 #### `site area list`
 
 List all areas for a site.
@@ -1107,6 +1112,8 @@ scadabridge --url <url> deploy artifacts [--site-id <int>]
 |--------|----------|-------------|
 | `--site-id` | no | Target site ID; deploys to exactly that site. Omit to deploy fleet-wide. A site-scoped (non-Administrator) Deployer must supply an in-scope `--site-id`; fleet-wide requires a system-wide Deployer or Administrator (arch-review C2). |
 
+Same output and exit-code rule as `site deploy-artifacts`: exit `1` when any site failed.
+
 #### `deploy status`
 
 Query deployment records, with optional filters and pagination.
diff --git a/tests/ZB.MOM.WW.ScadaBridge.CLI.Tests/DeployArtifactsExitCodeTests.cs b/tests/ZB.MOM.WW.ScadaBridge.CLI.Tests/DeployArtifactsExitCodeTests.cs
new file mode 100644
index 00000000..d283c977
--- /dev/null
+++ b/tests/ZB.MOM.WW.ScadaBridge.CLI.Tests/DeployArtifactsExitCodeTests.cs
@@ -0,0 +1,66 @@
+using System.CommandLine;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+using ZB.MOM.WW.ScadaBridge.CLI.Commands;
+
+namespace ZB.MOM.WW.ScadaBridge.CLI.Tests;
+
+/// <summary>
+/// Both artifact-deploy commands (<c>site deploy-artifacts</c> and <c>deploy artifacts</c>) exit
+/// 1 when any site in the summary failed. A per-site failure is a successful HTTP call, so they
+/// used to exit 0 and a script could not tell a failed site from a clean deploy.
+/// </summary>
+public class DeployArtifactsExitCodeTests
+{
+    private const string AllSucceeded =
+        "{\"deploymentId\":\"d1\",\"siteResults\":[{\"siteId\":\"site-a\",\"siteName\":\"A\",\"success\":true}]," +
+        "\"successCount\":1,\"failureCount\":0}";
+
+    private const string OneFailed =
+        "{\"deploymentId\":\"d1\",\"siteResults\":[{\"siteId\":\"site-a\",\"siteName\":\"A\",\"success\":true}," +
+        "{\"siteId\":\"site-b\",\"siteName\":\"B\",\"success\":false,\"errorMessage\":\"Secret 'k' ... missing\"}]," +
+        "\"successCount\":1,\"failureCount\":1}";
+
+    [Theory]
+    [InlineData("site", AllSucceeded, 0)]
+    [InlineData("site", OneFailed, 1)]
+    [InlineData("site", "{\"unexpected\":true}", 1)]
+    [InlineData("deploy", AllSucceeded, 0)]
+    [InlineData("deploy", OneFailed, 1)]
+    [InlineData("deploy", "{\"unexpected\":true}", 1)]
+    public async Task ArtifactDeployExitCodeFollowsFailureCount(string group, string response, int expected)
+    {
+        var listener = new TcpListener(IPAddress.Loopback, 0);
+        listener.Start();
+        try
+        {
+            var port = ((IPEndPoint)listener.LocalEndpoint).Port;
+            var server = Task.Run(async () =>
+            {
+                using var client = await listener.AcceptTcpClientAsync();
+                await using var stream = client.GetStream();
+                using var reader = new StreamReader(stream, Encoding.ASCII, leaveOpen: true);
+                while (await reader.ReadLineAsync() is { Length: > 0 }) { }
+                var body = Encoding.UTF8.GetBytes(response);
+                var headers = Encoding.ASCII.GetBytes($"HTTP/1.1 200 OK\r\nContent-Type: application/json\r\nContent-Length: {body.Length}\r\nConnection: close\r\n\r\n");
+                await stream.WriteAsync(headers);
+                await stream.WriteAsync(body);
+            });
+            var root = new RootCommand();
+            var url = new Option<string>("--url") { Recursive = true };
+            var format = new Option<string>("--format") { Recursive = true };
+            var user = new Option<string>("--username") { Recursive = true };
+            var password = new Option<string>("--password") { Recursive = true };
+            root.Add(url); root.Add(format); root.Add(user); root.Add(password);
+            root.Add(SiteCommands.Build(url, format, user, password));
+            root.Add(DeployCommands.Build(url, format, user, password));
+            string[] verb = group == "site" ? ["site", "deploy-artifacts"] : ["deploy", "artifacts"];
+            var exit = await root.Parse([.. verb, "--url", $"http://127.0.0.1:{port}",
+                "--username", "test", "--password", "test", "--format", "json"]).InvokeAsync();
+            await server.WaitAsync(TimeSpan.FromSeconds(5));
+            Assert.Equal(expected, exit);
+        }
+        finally { listener.Stop(); }
+    }
+}