diff --git a/samples/DistributedWorkers/Trax.Samples.EnergyHub.Hub/Program.cs b/samples/DistributedWorkers/Trax.Samples.EnergyHub.Hub/Program.cs
index 680c67a..3336d94 100644
--- a/samples/DistributedWorkers/Trax.Samples.EnergyHub.Hub/Program.cs
+++ b/samples/DistributedWorkers/Trax.Samples.EnergyHub.Hub/Program.cs
@@ -185,7 +185,15 @@
 // Depth 6 accommodates the dispatch → mutation → output → nested type →
 // field → scalar query chain. The Trax default of 4 is the conservative
 // production choice; raise it deliberately when your schema needs it.
-builder.Services.AddTraxGraphQL(graphql => graphql.MaxExecutionDepth(6));
+builder.Services.AddTraxGraphQL(graphql =>
+    graphql
+        .MaxExecutionDepth(6)
+        // The hub exposes operational queries and scheduler-control mutations
+        // so the EnergyHub web UI can render the manifest dashboard and
+        // trigger jobs. Both surfaces are off by default; opt in here.
+        .ExposeOperationQueries()
+        .ExposeOperationMutations()
+);
 builder.Services.AddHealthChecks().AddTraxHealthCheck();
 
 var app = builder.Build();
diff --git a/samples/JobHunt/Trax.Samples.JobHunt.Hub/Program.cs b/samples/JobHunt/Trax.Samples.JobHunt.Hub/Program.cs
index e522e42..5f1f86b 100644
--- a/samples/JobHunt/Trax.Samples.JobHunt.Hub/Program.cs
+++ b/samples/JobHunt/Trax.Samples.JobHunt.Hub/Program.cs
@@ -112,7 +112,15 @@
 builder.Services.AddSingleton<IEmailSender, StubEmailSender>();
 
 // ── GraphQL API + subscriptions ─────────────────────────────────────────────
-builder.Services.AddTraxGraphQL(graphql => graphql.AddTypeExtension<JobHuntSubscriptions>());
+// Phase 0 has no [TraxQuery]/[TraxMutation] trains yet, so without the
+// operations namespace RootQuery would be empty. Expose ops so the schema
+// has at least the framework-level query and mutation fields.
+builder.Services.AddTraxGraphQL(graphql =>
+    graphql
+        .AddTypeExtension<JobHuntSubscriptions>()
+        .ExposeOperationQueries()
+        .ExposeOperationMutations()
+);
 
 builder.Services.AddHealthChecks().AddTraxHealthCheck();
 
diff --git a/samples/LocalWorkers/Trax.Samples.GameServer.Api/Program.cs b/samples/LocalWorkers/Trax.Samples.GameServer.Api/Program.cs
index 71c3c9b..d61b9aa 100644
--- a/samples/LocalWorkers/Trax.Samples.GameServer.Api/Program.cs
+++ b/samples/LocalWorkers/Trax.Samples.GameServer.Api/Program.cs
@@ -185,6 +185,11 @@
         .MaxExecutionDepth(6)
         .AddDbContext<GameDbContext>()
         .AddTypeExtensions(typeof(Program).Assembly)
+        // The web UI surfaces health, manifests, executions, and dead letters
+        // for the in-browser ops dashboard, and lets operators trigger /
+        // cancel jobs. Both surfaces are off by default; opt in here.
+        .ExposeOperationQueries()
+        .ExposeOperationMutations()
 );
 builder.Services.AddHealthChecks().AddTraxHealthCheck();