Add XML documentation across gateway, worker, and .NET client

src/MxGateway.Tests/Gateway/Dashboard/DashboardAuthenticatorTests.cs

@@ -7,8 +7,14 @@ using MxGateway.Server.Security.Authorization;
 
 namespace MxGateway.Tests.Gateway.Dashboard;
 
+/// <summary>
+/// Tests for dashboard authentication using API keys.
+/// </summary>
 public sealed class DashboardAuthenticatorTests
 {
+    /// <summary>
+    /// Verifies an admin-scoped key produces a valid cookie principal.
+    /// </summary>
     [Fact]
     public async Task AuthenticateAsync_AdminKey_ReturnsCookiePrincipal()
     {
@@ -29,6 +35,9 @@ public sealed class DashboardAuthenticatorTests
         Assert.Equal("Bearer mxgw_operator01_super-secret", verifier.LastAuthorizationHeader);
     }
 
+    /// <summary>
+    /// Verifies a non-admin key fails authentication without exposing the API key.
+    /// </summary>
     [Fact]
     public async Task AuthenticateAsync_NonAdminKey_ReturnsFailureWithoutRawApiKey()
     {
@@ -44,6 +53,9 @@ public sealed class DashboardAuthenticatorTests
         Assert.DoesNotContain("super-secret", result.FailureMessage, StringComparison.Ordinal);
     }
 
+    /// <summary>
+    /// Verifies that when admin scope is not required, any authenticated key is accepted.
+    /// </summary>
     [Fact]
     public async Task AuthenticateAsync_RequireAdminScopeFalse_AllowsAuthenticatedKey()
     {
@@ -59,6 +71,9 @@ public sealed class DashboardAuthenticatorTests
         Assert.NotNull(result.Principal);
     }
 
+    /// <summary>
+    /// Verifies an invalid key returns a generic failure message.
+    /// </summary>
     [Fact]
     public async Task AuthenticateAsync_InvalidKey_ReturnsGenericFailure()
     {
@@ -97,10 +112,17 @@ public sealed class DashboardAuthenticatorTests
             Scopes: new HashSet<string>(scopes, StringComparer.Ordinal)));
     }
 
+    /// <summary>
+    /// Test implementation that records the authorization header for verification.
+    /// </summary>
     private sealed class FakeApiKeyVerifier(ApiKeyVerificationResult result) : IApiKeyVerifier
     {
+        /// <summary>
+        /// The authorization header that was last verified.
+        /// </summary>
         public string? LastAuthorizationHeader { get; private set; }
 
+        /// <inheritdoc />
         public Task<ApiKeyVerificationResult> VerifyAsync(
             string? authorizationHeader,
             CancellationToken cancellationToken)

src/MxGateway.Tests/Gateway/Dashboard/DashboardAuthorizationHandlerTests.cs

@@ -11,6 +11,7 @@ namespace MxGateway.Tests.Gateway.Dashboard;
 
 public sealed class DashboardAuthorizationHandlerTests
 {
+    /// <summary>Verifies that unauthenticated remote requests fail authorization.</summary>
     [Fact]
     public async Task HandleAsync_UnauthenticatedRemoteRequest_DoesNotSucceed()
     {
@@ -22,6 +23,7 @@ public sealed class DashboardAuthorizationHandlerTests
         Assert.False(context.HasSucceeded);
     }
 
+    /// <summary>Verifies that anonymous localhost access succeeds when allowed.</summary>
     [Fact]
     public async Task HandleAsync_AnonymousLocalhostAllowed_Succeeds()
     {
@@ -33,6 +35,7 @@ public sealed class DashboardAuthorizationHandlerTests
         Assert.True(context.HasSucceeded);
     }
 
+    /// <summary>Verifies that authenticated users without admin scope fail authorization.</summary>
     [Fact]
     public async Task HandleAsync_AuthenticatedWithoutAdminScope_DoesNotSucceed()
     {
@@ -44,6 +47,7 @@ public sealed class DashboardAuthorizationHandlerTests
         Assert.False(context.HasSucceeded);
     }
 
+    /// <summary>Verifies that authenticated users with admin scope succeed.</summary>
     [Fact]
     public async Task HandleAsync_AuthenticatedWithAdminScope_Succeeds()
     {

src/MxGateway.Tests/Gateway/Dashboard/DashboardCookieOptionsTests.cs

@@ -10,6 +10,7 @@ namespace MxGateway.Tests.Gateway.Dashboard;
 
 public sealed class DashboardCookieOptionsTests
 {
+    /// <summary>Verifies that the application configures secure dashboard authentication cookies.</summary>
     [Fact]
     public void Build_ConfiguresSecureDashboardCookie()
     {

src/MxGateway.Tests/Gateway/Dashboard/DashboardSnapshotServiceTests.cs

@@ -11,6 +11,9 @@ namespace MxGateway.Tests.Gateway.Dashboard;
 
 public sealed class DashboardSnapshotServiceTests
 {
+    /// <summary>
+    /// Verifies snapshot returns empty collections and healthy status when registry is empty.
+    /// </summary>
     [Fact]
     public void GetSnapshot_WhenRegistryEmpty_ReturnsEmptyOperationalState()
     {
@@ -27,6 +30,9 @@ public sealed class DashboardSnapshotServiceTests
         Assert.NotNull(snapshot.Configuration);
     }
 
+    /// <summary>
+    /// Verifies snapshot projects active, faulted, and closed session states with worker and metrics data.
+    /// </summary>
     [Fact]
     public void GetSnapshot_ProjectsActiveAndFaultedSessionsWorkersMetricsAndFaults()
     {
@@ -84,6 +90,9 @@ public sealed class DashboardSnapshotServiceTests
         Assert.Equal("worker pipe disconnected", fault.Message);
     }
 
+    /// <summary>
+    /// Verifies snapshot redacts sensitive values from client identity, session name, and fault messages.
+    /// </summary>
     [Fact]
     public void GetSnapshot_RedactsSecretsFromSessionAndFaultFields()
     {
@@ -110,6 +119,9 @@ public sealed class DashboardSnapshotServiceTests
         Assert.Equal("[redacted]", snapshot.Configuration.Authentication.PepperSecretName);
     }
 
+    /// <summary>
+    /// Verifies snapshot generation does not mutate session or worker client state.
+    /// </summary>
     [Fact]
     public void GetSnapshot_DoesNotMutateSessionOrWorkerState()
     {
@@ -136,6 +148,9 @@ public sealed class DashboardSnapshotServiceTests
         Assert.Equal(0, workerClient.KillCount);
     }
 
+    /// <summary>
+    /// Verifies snapshot respects configured limits for recent sessions and faults.
+    /// </summary>
     [Fact]
     public void GetSnapshot_AppliesRecentSessionAndFaultLimits()
     {
@@ -172,6 +187,9 @@ public sealed class DashboardSnapshotServiceTests
         Assert.Equal("session-newer", Assert.Single(snapshot.Faults).SessionId);
     }
 
+    /// <summary>
+    /// Verifies snapshot projects Galaxy hierarchy cache data including templates and categories.
+    /// </summary>
     [Fact]
     public void GetSnapshot_ProjectsGalaxySummaryFromHierarchyCache()
     {
@@ -217,6 +235,9 @@ public sealed class DashboardSnapshotServiceTests
         Assert.Contains(snapshot.Galaxy.ObjectCategories, c => c.CategoryName == "Area" && c.ObjectCount == 1);
     }
 
+    /// <summary>
+    /// Verifies snapshot watcher cancels cleanly when subscriber cancels.
+    /// </summary>
     [Fact]
     public async Task WatchSnapshotsAsync_WhenSubscriberCancels_DisposesCleanly()
     {
@@ -268,10 +289,23 @@ public sealed class DashboardSnapshotServiceTests
 
     private sealed class StubGalaxyHierarchyCache(GalaxyHierarchyCacheEntry current) : IGalaxyHierarchyCache
     {
+        /// <summary>
+        /// Gets the current Galaxy hierarchy cache entry.
+        /// </summary>
         public GalaxyHierarchyCacheEntry Current { get; } = current;
 
+        /// <summary>
+        /// Refreshes the cache asynchronously.
+        /// </summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>Completed task.</returns>
         public Task RefreshAsync(CancellationToken cancellationToken) => Task.CompletedTask;
 
+        /// <summary>
+        /// Waits for the first cache load asynchronously.
+        /// </summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>Completed task.</returns>
         public Task WaitForFirstLoadAsync(CancellationToken cancellationToken) => Task.CompletedTask;
     }
 
@@ -301,26 +335,59 @@ public sealed class DashboardSnapshotServiceTests
         int? processId,
         WorkerClientState state) : IWorkerClient
     {
+        /// <summary>
+        /// Gets the session identifier.
+        /// </summary>
         public string SessionId { get; } = sessionId;
 
+        /// <summary>
+        /// Gets the process identifier.
+        /// </summary>
         public int? ProcessId { get; } = processId;
 
+        /// <summary>
+        /// Gets the current worker client state.
+        /// </summary>
         public WorkerClientState State { get; private set; } = state;
 
+        /// <summary>
+        /// Gets the timestamp of the last heartbeat.
+        /// </summary>
         public DateTimeOffset LastHeartbeatAt { get; } = DateTimeOffset.Parse("2026-04-26T10:02:00Z");
 
+        /// <summary>
+        /// Gets the count of start invocations.
+        /// </summary>
         public int StartCount { get; private set; }
 
+        /// <summary>
+        /// Gets the count of shutdown invocations.
+        /// </summary>
         public int ShutdownCount { get; private set; }
 
+        /// <summary>
+        /// Gets the count of kill invocations.
+        /// </summary>
         public int KillCount { get; private set; }
 
+        /// <summary>
+        /// Starts the worker client asynchronously.
+        /// </summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>Completed task.</returns>
         public Task StartAsync(CancellationToken cancellationToken)
         {
             StartCount++;
             return Task.CompletedTask;
         }
 
+        /// <summary>
+        /// Invokes a worker command asynchronously.
+        /// </summary>
+        /// <param name="command">The command to invoke.</param>
+        /// <param name="timeout">Command timeout.</param>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>Command reply.</returns>
         public Task<WorkerCommandReply> InvokeAsync(
             WorkerCommand command,
             TimeSpan timeout,
@@ -329,6 +396,11 @@ public sealed class DashboardSnapshotServiceTests
             return Task.FromResult(new WorkerCommandReply());
         }
 
+        /// <summary>
+        /// Reads events from the worker asynchronously.
+        /// </summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>Async enumerable of worker events.</returns>
         public async IAsyncEnumerable<WorkerEvent> ReadEventsAsync(
             [System.Runtime.CompilerServices.EnumeratorCancellation] CancellationToken cancellationToken)
         {
@@ -336,6 +408,12 @@ public sealed class DashboardSnapshotServiceTests
             yield break;
         }
 
+        /// <summary>
+        /// Shuts down the worker client asynchronously.
+        /// </summary>
+        /// <param name="timeout">Shutdown timeout.</param>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>Completed task.</returns>
         public Task ShutdownAsync(
             TimeSpan timeout,
             CancellationToken cancellationToken)
@@ -345,12 +423,20 @@ public sealed class DashboardSnapshotServiceTests
             return Task.CompletedTask;
         }
 
+        /// <summary>
+        /// Terminates the worker client.
+        /// </summary>
+        /// <param name="reason">Reason for termination.</param>
         public void Kill(string reason)
         {
             KillCount++;
             State = WorkerClientState.Faulted;
         }
 
+        /// <summary>
+        /// Releases resources used by this worker client.
+        /// </summary>
+        /// <returns>Completed value task.</returns>
         public ValueTask DisposeAsync()
         {
             return ValueTask.CompletedTask;