diff --git a/VolcanicAgenticCore.slnx b/VolcanicAgenticCore.slnx
index 0a30abf..7231bbf 100644
--- a/VolcanicAgenticCore.slnx
+++ b/VolcanicAgenticCore.slnx
@@ -12,6 +12,7 @@
     <Project Path="hosts/Volcanic.AgenticCore.Telegram/Volcanic.AgenticCore.Telegram.csproj" />
   </Folder>
   <Folder Name="/samples/">
+    <Project Path="samples/Volcanic.AgenticCore.Sample.A2A/Volcanic.AgenticCore.Sample.A2A.csproj" />
     <Project Path="samples/Volcanic.AgenticCore.Sample.Headless/Volcanic.AgenticCore.Sample.Headless.csproj" />
   </Folder>
   <Folder Name="/src/">
diff --git a/samples/Volcanic.AgenticCore.Sample.A2A/Program.cs b/samples/Volcanic.AgenticCore.Sample.A2A/Program.cs
new file mode 100644
index 0000000..d6365c4
--- /dev/null
+++ b/samples/Volcanic.AgenticCore.Sample.A2A/Program.cs
@@ -0,0 +1,50 @@
+// Minimal standalone A2A server over one workspace.
+//
+//   dotnet run --project samples/Volcanic.AgenticCore.Sample.A2A -- --faux --workspace /tmp/ws
+//   (callers in /tmp/ws/.volcanic/a2a/callers.json; card at http://localhost:5000/.well-known/agent-card.json)
+
+using Microsoft.Extensions.Logging;
+using Volcanic.AgenticCore.A2A.Server.Callers;
+using Volcanic.AgenticCore.A2A.Server.Hosting;
+using Volcanic.AgenticCore.Extensions.ClaudeCode;
+using Volcanic.AgenticCore.Features.Extensions;
+using Volcanic.AgenticCore.Hosting;
+using Volcanic.AgenticCore.Testing;
+
+var faux = args.Contains("--faux");
+var workspaceIndex = Array.IndexOf(args, "--workspace");
+var workspace = Path.GetFullPath(workspaceIndex >= 0 && workspaceIndex + 1 < args.Length ? args[workspaceIndex + 1] : Directory.GetCurrentDirectory());
+
+var builder = WebApplication.CreateBuilder(args);
+builder.Services.AddAgenticCore(o =>
+{
+    if (faux)
+    {
+        var provider = new FauxProvider();
+        o.Extensions.Add(ExtensionRegistration.FromInstance(provider.Extension));
+        o.DefaultModel = FauxProvider.ModelKey;
+    }
+    else
+    {
+        o.AddExtension<ClaudeCodeProviderExtension>();
+        o.DefaultModel ??= "claude-code/sonnet";
+    }
+});
+builder.Services.AddSingleton<IA2ACallerDirectory>(sp => new WorkspaceCallerDirectory(
+    () => [new A2AWorkspace(workspace, "sample", "sample")], sp.GetRequiredService<ILogger<WorkspaceCallerDirectory>>()));
+builder.Services.AddSingleton<IA2AOwnerNotifier, LogNotifier>();
+builder.Services.AddA2AServer(o => builder.Configuration.GetSection(Volcanic.AgenticCore.A2A.Server.A2AHostOptions.SectionName).Bind(o));
+
+var app = builder.Build();
+app.MapA2AServer();
+app.Logger.LogInformation("A2A sample serving workspace {Workspace}; callers in {File}", workspace, CallersFile.PathFor(workspace));
+app.Run();
+
+internal sealed class LogNotifier(ILogger<LogNotifier> logger) : IA2AOwnerNotifier
+{
+    public Task NotifyAsync(A2ACaller caller, string text, CancellationToken cancellationToken)
+    {
+        logger.LogInformation("notify_owner from {Caller}: {Text}", caller.Name, text);
+        return Task.CompletedTask;
+    }
+}
diff --git a/samples/Volcanic.AgenticCore.Sample.A2A/Volcanic.AgenticCore.Sample.A2A.csproj b/samples/Volcanic.AgenticCore.Sample.A2A/Volcanic.AgenticCore.Sample.A2A.csproj
new file mode 100644
index 0000000..3eb1964
--- /dev/null
+++ b/samples/Volcanic.AgenticCore.Sample.A2A/Volcanic.AgenticCore.Sample.A2A.csproj
@@ -0,0 +1,6 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+  <ItemGroup>
+    <ProjectReference Include="../../src/Volcanic.AgenticCore.A2A.Server/Volcanic.AgenticCore.A2A.Server.csproj" />
+    <ProjectReference Include="../../extensions/Volcanic.AgenticCore.Extensions.ClaudeCode/Volcanic.AgenticCore.Extensions.ClaudeCode.csproj" />
+  </ItemGroup>
+</Project>