diff --git a/.claude/commands b/.claude/commands
index a3970d47..c506bb75 160000
--- a/.claude/commands
+++ b/.claude/commands
@@ -1 +1 @@
-Subproject commit a3970d474c65afd4d2709a88704e6cc14f84f3d7
+Subproject commit c506bb75e02f076aad45deca3c9d9e45c36b51c9
diff --git a/.github/workflows/deploy-backend.yml b/.github/workflows/deploy-backend.yml
index 61f941eb..8669e353 100644
--- a/.github/workflows/deploy-backend.yml
+++ b/.github/workflows/deploy-backend.yml
@@ -25,10 +25,10 @@ jobs:
         run: dotnet restore src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj
 
       - name: Build
-        run: dotnet build src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj --configuration Release --no-restore
+        run: dotnet build src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj --configuration Release --no-restore -p:SourceRevisionId=${{ github.sha }}
 
       - name: Publish
-        run: dotnet publish src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj --configuration Release --output ./publish --no-build
+        run: dotnet publish src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj --configuration Release --output ./publish --no-build -p:SourceRevisionId=${{ github.sha }}
 
       - name: Deploy to Azure Functions
         uses: Azure/functions-action@v1
diff --git a/src/Agent/AutopilotMonitor.Agent.V2/buildcounter.txt b/src/Agent/AutopilotMonitor.Agent.V2/buildcounter.txt
index 58c9bdf9..9b252fd0 100644
--- a/src/Agent/AutopilotMonitor.Agent.V2/buildcounter.txt
+++ b/src/Agent/AutopilotMonitor.Agent.V2/buildcounter.txt
@@ -1 +1 @@
-111
+113
diff --git a/src/Agent/AutopilotMonitor.Agent/buildcounter.txt b/src/Agent/AutopilotMonitor.Agent/buildcounter.txt
index 19d50492..41495a48 100644
--- a/src/Agent/AutopilotMonitor.Agent/buildcounter.txt
+++ b/src/Agent/AutopilotMonitor.Agent/buildcounter.txt
@@ -1 +1 @@
-1078
+1079
diff --git a/src/Backend/AutopilotMonitor.Functions.Tests/BackendBuildInfoTests.cs b/src/Backend/AutopilotMonitor.Functions.Tests/BackendBuildInfoTests.cs
new file mode 100644
index 00000000..3f5c408d
--- /dev/null
+++ b/src/Backend/AutopilotMonitor.Functions.Tests/BackendBuildInfoTests.cs
@@ -0,0 +1,64 @@
+using AutopilotMonitor.Functions.Services;
+
+namespace AutopilotMonitor.Functions.Tests;
+
+public class BackendBuildInfoTests
+{
+    [Fact]
+    public void Parse_VersionWithLongSha_TrimsTo7Chars()
+    {
+        var (version, commit) = BackendBuildInfo.ParseInformationalVersion(
+            "1.0.0+2e82dd2bdeadbeefcafe1234567890abcdef1234");
+
+        Assert.Equal("1.0.0", version);
+        Assert.Equal("2e82dd2", commit);
+    }
+
+    [Fact]
+    public void Parse_VersionWithoutSha_ReturnsEmptyCommit()
+    {
+        var (version, commit) = BackendBuildInfo.ParseInformationalVersion("1.0.0");
+
+        Assert.Equal("1.0.0", version);
+        Assert.Equal(string.Empty, commit);
+    }
+
+    [Fact]
+    public void Parse_ShortShaBelowSeven_PreservedAsIs()
+    {
+        var (version, commit) = BackendBuildInfo.ParseInformationalVersion("1.0.0+abc12");
+
+        Assert.Equal("1.0.0", version);
+        Assert.Equal("abc12", commit);
+    }
+
+    [Fact]
+    public void Parse_Empty_ReturnsFallback()
+    {
+        var (version, commit) = BackendBuildInfo.ParseInformationalVersion("");
+
+        Assert.Equal("0.0.0", version);
+        Assert.Equal(string.Empty, commit);
+    }
+
+    [Fact]
+    public void Parse_NullSafe()
+    {
+        var (version, commit) = BackendBuildInfo.ParseInformationalVersion(null!);
+
+        Assert.Equal("0.0.0", version);
+        Assert.Equal(string.Empty, commit);
+    }
+
+    [Fact]
+    public void Constructor_ReadsCurrentAssembly_ProducesNonEmptyVersion()
+    {
+        var info = new BackendBuildInfo();
+
+        // Version comes from <Version> in .csproj via generated AssemblyInformationalVersion.
+        // Test asserts only that the parser wired to the assembly produces something — we
+        // don't hardcode the version string here to avoid coupling tests to every bump.
+        Assert.False(string.IsNullOrWhiteSpace(info.Version));
+        Assert.NotEqual(default, info.BuildUtc);
+    }
+}
diff --git a/src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj b/src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj
index 6da0673c..74efbf9d 100644
--- a/src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj
+++ b/src/Backend/AutopilotMonitor.Functions/AutopilotMonitor.Functions.csproj
@@ -6,6 +6,12 @@
     <OutputType>Exe</OutputType>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+
+    <!-- Backend version surfaced via /api/health. CommitHash is injected at CI time
+         through -p:SourceRevisionId=<github.sha> and appended to InformationalVersion. -->
+    <Version>1.0.0</Version>
+    <GenerateAssemblyInfo>true</GenerateAssemblyInfo>
+    <IncludeSourceRevisionInInformationalVersion>true</IncludeSourceRevisionInInformationalVersion>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Backend/AutopilotMonitor.Functions/Functions/Infrastructure/HealthCheckFunction.cs b/src/Backend/AutopilotMonitor.Functions/Functions/Infrastructure/HealthCheckFunction.cs
index 8f393753..85199df1 100644
--- a/src/Backend/AutopilotMonitor.Functions/Functions/Infrastructure/HealthCheckFunction.cs
+++ b/src/Backend/AutopilotMonitor.Functions/Functions/Infrastructure/HealthCheckFunction.cs
@@ -12,6 +12,7 @@ namespace AutopilotMonitor.Functions.Functions.Infrastructure
         private readonly ILogger<HealthCheckFunction> _logger;
         private readonly HealthCheckService _healthCheckService;
         private readonly IMemoryCache _cache;
+        private readonly BackendBuildInfo _buildInfo;
 
         private const int MaxRequestsPerMinute = 30;
         private static readonly TimeSpan RateWindow = TimeSpan.FromMinutes(1);
@@ -19,11 +20,13 @@ namespace AutopilotMonitor.Functions.Functions.Infrastructure
         public HealthCheckFunction(
             ILogger<HealthCheckFunction> logger,
             HealthCheckService healthCheckService,
-            IMemoryCache cache)
+            IMemoryCache cache,
+            BackendBuildInfo buildInfo)
         {
             _logger = logger;
             _healthCheckService = healthCheckService;
             _cache = cache;
+            _buildInfo = buildInfo;
         }
 
         /// <summary>
@@ -71,7 +74,10 @@ namespace AutopilotMonitor.Functions.Functions.Infrastructure
             {
                 status = "healthy",
                 service = "Autopilot Monitor API",
-                timestamp = DateTime.UtcNow
+                timestamp = DateTime.UtcNow,
+                version = _buildInfo.Version,
+                commitHash = _buildInfo.CommitHash,
+                buildUtc = _buildInfo.BuildUtc
             });
 
             return response;
@@ -101,7 +107,10 @@ namespace AutopilotMonitor.Functions.Functions.Infrastructure
                 service = "Autopilot Monitor API",
                 timestamp = healthCheckResult.Timestamp,
                 overallStatus = healthCheckResult.OverallStatus,
-                checks = healthCheckResult.Checks
+                checks = healthCheckResult.Checks,
+                version = _buildInfo.Version,
+                commitHash = _buildInfo.CommitHash,
+                buildUtc = _buildInfo.BuildUtc
             });
 
             return response;
diff --git a/src/Backend/AutopilotMonitor.Functions/Program.cs b/src/Backend/AutopilotMonitor.Functions/Program.cs
index e4066287..4f1f886b 100644
--- a/src/Backend/AutopilotMonitor.Functions/Program.cs
+++ b/src/Backend/AutopilotMonitor.Functions/Program.cs
@@ -146,6 +146,7 @@ builder.Services.AddSingleton<McpUserService>();
 builder.Services.AddSingleton<PreviewWhitelistService>();
 builder.Services.AddSingleton<TenantAdminsService>();
 builder.Services.AddSingleton<HealthCheckService>();
+builder.Services.AddSingleton<BackendBuildInfo>();
 builder.Services.AddSingleton<GatherRuleService>();
 builder.Services.AddSingleton<AnalyzeRuleService>();
 builder.Services.AddSingleton<ImeLogPatternService>();
diff --git a/src/Backend/AutopilotMonitor.Functions/Services/BackendBuildInfo.cs b/src/Backend/AutopilotMonitor.Functions/Services/BackendBuildInfo.cs
new file mode 100644
index 00000000..af39a7c5
--- /dev/null
+++ b/src/Backend/AutopilotMonitor.Functions/Services/BackendBuildInfo.cs
@@ -0,0 +1,61 @@
+using System.Reflection;
+
+namespace AutopilotMonitor.Functions.Services
+{
+    /// <summary>
+    /// Exposes the backend build identity (version, commit hash, build time) surfaced
+    /// via /api/health and /api/health/detailed. Values come from the assembly's
+    /// InformationalVersion attribute which MSBuild populates from &lt;Version&gt; and
+    /// -p:SourceRevisionId (the latter is set by the deploy workflow to github.sha).
+    /// </summary>
+    public sealed class BackendBuildInfo
+    {
+        public string Version { get; }
+        public string CommitHash { get; }
+        public DateTime BuildUtc { get; }
+
+        public BackendBuildInfo()
+        {
+            var asm = typeof(BackendBuildInfo).Assembly;
+            var info = asm.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion
+                ?? "0.0.0";
+
+            (Version, CommitHash) = ParseInformationalVersion(info);
+
+            try
+            {
+                var path = asm.Location;
+                BuildUtc = !string.IsNullOrEmpty(path) && File.Exists(path)
+                    ? File.GetLastWriteTimeUtc(path)
+                    : DateTime.UtcNow;
+            }
+            catch
+            {
+                BuildUtc = DateTime.UtcNow;
+            }
+        }
+
+        /// <summary>
+        /// Splits an InformationalVersion ("1.0.0+abc1234567...") into a semver part
+        /// and a 7-char short commit hash. No '+' → empty commit hash.
+        /// </summary>
+        internal static (string Version, string CommitHash) ParseInformationalVersion(string informationalVersion)
+        {
+            if (string.IsNullOrWhiteSpace(informationalVersion))
+            {
+                return ("0.0.0", string.Empty);
+            }
+
+            var plus = informationalVersion.IndexOf('+');
+            if (plus < 0)
+            {
+                return (informationalVersion, string.Empty);
+            }
+
+            var version = informationalVersion.Substring(0, plus);
+            var sha = informationalVersion.Substring(plus + 1);
+            var shortSha = sha.Length > 7 ? sha.Substring(0, 7) : sha;
+            return (version, shortSha);
+        }
+    }
+}
diff --git a/src/Web/autopilot-monitor-web/app/health-check/page.tsx b/src/Web/autopilot-monitor-web/app/health-check/page.tsx
index 39a2a9fb..1fcfd1a3 100644
--- a/src/Web/autopilot-monitor-web/app/health-check/page.tsx
+++ b/src/Web/autopilot-monitor-web/app/health-check/page.tsx
@@ -22,6 +22,9 @@ interface HealthCheckResult {
   timestamp: string;
   overallStatus: string;
   checks: HealthCheck[];
+  version?: string;
+  commitHash?: string;
+  buildUtc?: string;
 }
 
 export default function HealthCheckPage() {
@@ -182,6 +185,44 @@ export default function HealthCheckPage() {
           </div>
         )}
 
+        {/* Backend Build (Global Admin only) */}
+        {user?.isGlobalAdmin && healthResult?.version && (
+          <div className="mb-6">
+            <h2 className="text-sm font-semibold text-gray-500 dark:text-gray-400 uppercase tracking-wider mb-3">Backend Build</h2>
+            <div className="bg-white dark:bg-gray-800 rounded-lg shadow border-l-4 border-indigo-500">
+              <div className="p-4 grid grid-cols-1 sm:grid-cols-3 gap-4 text-sm">
+                <div>
+                  <dt className="text-xs font-semibold text-gray-500 dark:text-gray-400 uppercase">Version</dt>
+                  <dd className="mt-1 font-mono text-gray-900 dark:text-gray-100">{healthResult.version}</dd>
+                </div>
+                <div>
+                  <dt className="text-xs font-semibold text-gray-500 dark:text-gray-400 uppercase">Commit</dt>
+                  <dd className="mt-1 font-mono text-gray-900 dark:text-gray-100">
+                    {healthResult.commitHash ? (
+                      <a
+                        href={`https://github.com/okieselbach/Autopilot-Monitor/commit/${healthResult.commitHash}`}
+                        target="_blank"
+                        rel="noopener noreferrer"
+                        className="text-indigo-600 dark:text-indigo-400 hover:underline"
+                      >
+                        {healthResult.commitHash}
+                      </a>
+                    ) : (
+                      <span className="text-gray-400">unknown</span>
+                    )}
+                  </dd>
+                </div>
+                <div>
+                  <dt className="text-xs font-semibold text-gray-500 dark:text-gray-400 uppercase">Built</dt>
+                  <dd className="mt-1 text-gray-900 dark:text-gray-100">
+                    {healthResult.buildUtc ? new Date(healthResult.buildUtc).toLocaleString() : '—'}
+                  </dd>
+                </div>
+              </div>
+            </div>
+          </div>
+        )}
+
         {/* Real-Time Connection Status */}
         <div className="mb-6">
           <h2 className="text-sm font-semibold text-gray-500 dark:text-gray-400 uppercase tracking-wider mb-3">Real-Time Connection</h2>