Move Foundry Responses hosting into Microsoft.Agents.AI.Foundry package

Move source and test files from the standalone Hosting.AzureAIResponses project
into the Foundry package under a Hosting/ subfolder. This consolidates the
Foundry-specific hosting adapter into the main Foundry package.

- Source: Microsoft.Agents.AI.Foundry.Hosting namespace
- Tests: merged into Foundry.UnitTests/Hosting/
- Conditionally compiled for .NETCoreApp TFMs only (net8.0+)
- Deleted standalone Hosting.AzureAIResponses project and test project
- Updated sample and solution references

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

dotnet/agent-framework-dotnet.slnx

@@ -494,7 +494,6 @@
     <Project Path="src/Microsoft.Agents.AI.Hosting.A2A.AspNetCore/Microsoft.Agents.AI.Hosting.A2A.AspNetCore.csproj" />
     <Project Path="src/Microsoft.Agents.AI.Hosting.A2A/Microsoft.Agents.AI.Hosting.A2A.csproj" />
     <Project Path="src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.csproj" />
-    <Project Path="src/Microsoft.Agents.AI.Hosting.AzureAIResponses/Microsoft.Agents.AI.Hosting.AzureAIResponses.csproj" />
     <Project Path="src/Microsoft.Agents.AI.Hosting.AzureFunctions/Microsoft.Agents.AI.Hosting.AzureFunctions.csproj" />
     <Project Path="src/Microsoft.Agents.AI.Hosting.OpenAI/Microsoft.Agents.AI.Hosting.OpenAI.csproj" />
     <Project Path="src/Microsoft.Agents.AI.Hosting/Microsoft.Agents.AI.Hosting.csproj" />
@@ -541,7 +540,6 @@
     <Project Path="tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests.csproj" />
     <Project Path="tests/Microsoft.Agents.AI.Hosting.A2A.UnitTests/Microsoft.Agents.AI.Hosting.A2A.UnitTests.csproj" />
     <Project Path="tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.UnitTests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.UnitTests.csproj" />
-    <Project Path="tests/Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests/Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests.csproj" />
     <Project Path="tests/Microsoft.Agents.AI.Hosting.AzureFunctions.UnitTests/Microsoft.Agents.AI.Hosting.AzureFunctions.UnitTests.csproj" />
     <Project Path="tests/Microsoft.Agents.AI.Hosting.OpenAI.UnitTests/Microsoft.Agents.AI.Hosting.OpenAI.UnitTests.csproj" />
     <Project Path="tests/Microsoft.Agents.AI.Hosting.UnitTests/Microsoft.Agents.AI.Hosting.UnitTests.csproj" />

dotnet/samples/04-hosting/FoundryResponsesHosting/FoundryResponsesHosting.csproj

@@ -18,8 +18,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\..\src\Microsoft.Agents.AI.Foundry\Microsoft.Agents.AI.Foundry.csproj" />
     <ProjectReference Include="..\..\..\src\Microsoft.Agents.AI.Hosting\Microsoft.Agents.AI.Hosting.csproj" />
-    <ProjectReference Include="..\..\..\src\Microsoft.Agents.AI.Hosting.AzureAIResponses\Microsoft.Agents.AI.Hosting.AzureAIResponses.csproj" />
     <ProjectReference Include="..\..\..\src\Microsoft.Agents.AI.OpenAI\Microsoft.Agents.AI.OpenAI.csproj" />
     <ProjectReference Include="..\..\..\src\Microsoft.Agents.AI.Workflows\Microsoft.Agents.AI.Workflows.csproj" />
   </ItemGroup>

dotnet/samples/04-hosting/FoundryResponsesHosting/Program.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 // This sample demonstrates hosting agent-framework agents as Foundry Hosted Agents
 // using the Azure AI Responses Server SDK.
@@ -21,7 +21,7 @@ using Azure.AI.OpenAI;
 using Azure.Identity;
 using Microsoft.Agents.AI;
 using Microsoft.Agents.AI.Hosting;
-using Microsoft.Agents.AI.Hosting.AzureAIResponses;
+using Microsoft.Agents.AI.Foundry.Hosting;
 using Microsoft.Agents.AI.Workflows;
 using Microsoft.Extensions.AI;
 using ModelContextProtocol.Client;

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/AgentFrameworkResponseHandler.cs

@@ -1,13 +1,17 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
+using System;
+using System.Collections.Generic;
 using System.Runtime.CompilerServices;
+using System.Threading;
+using System.Threading.Tasks;
 using Azure.AI.AgentServer.Responses;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Extensions.AI;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses;
+namespace Microsoft.Agents.AI.Foundry.Hosting;
 
 /// <summary>
 /// A <see cref="ResponseHandler"/> implementation that bridges the Azure AI Responses Server SDK

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/InputConverter.cs

@@ -1,12 +1,15 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
+using System;
+using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
+using System.Linq;
 using System.Text.Json;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Extensions.AI;
 using MeaiTextContent = Microsoft.Extensions.AI.TextContent;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses;
+namespace Microsoft.Agents.AI.Foundry.Hosting;
 
 /// <summary>
 /// Converts Responses Server SDK input types to agent-framework <see cref="ChatMessage"/> types.

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/OutputConverter.cs

@@ -1,17 +1,21 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
+using System;
+using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
 using System.Security.Cryptography;
 using System.Text;
 using System.Text.Json;
+using System.Threading;
+using System.Threading.Tasks;
 using Azure.AI.AgentServer.Responses;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Agents.AI.Workflows;
 using Microsoft.Extensions.AI;
 using MeaiTextContent = Microsoft.Extensions.AI.TextContent;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses;
+namespace Microsoft.Agents.AI.Foundry.Hosting;
 
 /// <summary>
 /// Converts agent-framework <see cref="AgentResponseUpdate"/> streams into

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/ServiceCollectionExtensions.cs

@@ -1,10 +1,11 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
+using System;
 using Azure.AI.AgentServer.Responses;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses;
+namespace Microsoft.Agents.AI.Foundry.Hosting;
 
 /// <summary>
 /// Extension methods for <see cref="IServiceCollection"/> to register the agent-framework

dotnet/src/Microsoft.Agents.AI.Foundry/Microsoft.Agents.AI.Foundry.csproj

@@ -3,7 +3,8 @@
   <PropertyGroup>
     <IsReleased>true</IsReleased>
     <InjectSharedThrow>true</InjectSharedThrow>
-    <NoWarn>$(NoWarn);OPENAI001</NoWarn>
+    <NoWarn>$(NoWarn);OPENAI001;MEAI001;NU1903</NoWarn>
+    <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
@@ -20,18 +21,32 @@
     <InjectSharedRedaction>true</InjectSharedRedaction>
   </PropertyGroup>
 
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="Azure.AI.Projects" />
     <PackageReference Include="Microsoft.Extensions.AI" />
+    <PackageReference Include="Microsoft.Extensions.AI.Abstractions" />
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" />
     <PackageReference Include="Microsoft.Extensions.Compliance.Abstractions" />
     <PackageReference Include="OpenAI" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
+    <PackageReference Include="Azure.AI.AgentServer.Responses" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\Microsoft.Agents.AI\Microsoft.Agents.AI.csproj" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
+    <ProjectReference Include="..\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
+    <ProjectReference Include="..\Microsoft.Agents.AI.Workflows\Microsoft.Agents.AI.Workflows.csproj" />
+  </ItemGroup>
+
   <PropertyGroup>
     <!-- NuGet Package Settings -->
     <Title>Microsoft Agent Framework for Foundry Agents</Title>
@@ -43,4 +58,9 @@
     <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
   </ItemGroup>
 
+  <!-- Hosting code requires .NET Core (ASP.NET Core + Azure.AI.AgentServer.Responses) -->
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp'">
+    <Compile Remove="Hosting\**" />
+  </ItemGroup>
+
 </Project>

dotnet/src/Microsoft.Agents.AI.Hosting.AzureAIResponses/Microsoft.Agents.AI.Hosting.AzureAIResponses.csproj

@@ -1,40 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFrameworks>$(TargetFrameworksCore)</TargetFrameworks>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <RootNamespace>Microsoft.Agents.AI.Hosting.AzureAIResponses</RootNamespace>
-    <VersionSuffix>alpha</VersionSuffix>
-    <NoWarn>$(NoWarn);MEAI001;NU1903</NoWarn>
-    <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
-  </PropertyGroup>
-
-  <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
-
-  <PropertyGroup>
-    <InjectSharedThrow>true</InjectSharedThrow>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <FrameworkReference Include="Microsoft.AspNetCore.App" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.AI.Abstractions" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Azure.AI.AgentServer.Responses" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
-    <ProjectReference Include="..\Microsoft.Agents.AI\Microsoft.Agents.AI.csproj" />
-    <ProjectReference Include="..\Microsoft.Agents.AI.Workflows\Microsoft.Agents.AI.Workflows.csproj" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <InternalsVisibleTo Include="Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests" />
-  </ItemGroup>
-
-</Project>

dotnet/tests/Microsoft.Agents.AI.Foundry.UnitTests/Hosting/AgentFrameworkResponseHandlerTests.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;
@@ -7,6 +7,7 @@ using System.Runtime.CompilerServices;
 using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
+using Microsoft.Agents.AI.Foundry.Hosting;
 using Azure.AI.AgentServer.Responses;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Extensions.AI;
@@ -16,7 +17,7 @@ using Microsoft.Extensions.Logging.Abstractions;
 using Moq;
 using MeaiTextContent = Microsoft.Extensions.AI.TextContent;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests;
+namespace Microsoft.Agents.AI.Foundry.UnitTests.Hosting;
 
 public class AgentFrameworkResponseHandlerTests
 {

dotnet/tests/Microsoft.Agents.AI.Foundry.UnitTests/Hosting/InputConverterTests.cs

@@ -1,13 +1,14 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Linq;
+using Microsoft.Agents.AI.Foundry.Hosting;
 using Azure.AI.AgentServer.Responses;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Extensions.AI;
 using MeaiTextContent = Microsoft.Extensions.AI.TextContent;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests;
+namespace Microsoft.Agents.AI.Foundry.UnitTests.Hosting;
 
 public class InputConverterTests
 {

dotnet/tests/Microsoft.Agents.AI.Foundry.UnitTests/Hosting/OutputConverterTests.cs

@@ -1,10 +1,11 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Microsoft.Agents.AI.Foundry.Hosting;
 using Azure.AI.AgentServer.Responses;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Agents.AI.Workflows;
@@ -12,7 +13,7 @@ using Microsoft.Extensions.AI;
 using Moq;
 using MeaiTextContent = Microsoft.Extensions.AI.TextContent;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests;
+namespace Microsoft.Agents.AI.Foundry.UnitTests.Hosting;
 
 public class OutputConverterTests
 {

dotnet/tests/Microsoft.Agents.AI.Foundry.UnitTests/Hosting/ServiceCollectionExtensionsTests.cs

@@ -1,12 +1,13 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Linq;
+using Microsoft.Agents.AI.Foundry.Hosting;
 using Azure.AI.AgentServer.Responses;
 using Microsoft.Extensions.DependencyInjection;
 using Moq;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests;
+namespace Microsoft.Agents.AI.Foundry.UnitTests.Hosting;
 
 public class ServiceCollectionExtensionsTests
 {

dotnet/tests/Microsoft.Agents.AI.Foundry.UnitTests/Hosting/WorkflowIntegrationTests.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;
@@ -9,6 +9,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Azure.AI.AgentServer.Responses;
 using Azure.AI.AgentServer.Responses.Models;
+using Microsoft.Agents.AI.Foundry.Hosting;
 using Microsoft.Agents.AI.Workflows;
 using Microsoft.Extensions.AI;
 using Microsoft.Extensions.DependencyInjection;
@@ -17,7 +18,7 @@ using Microsoft.Extensions.Logging.Abstractions;
 using Moq;
 using MeaiTextContent = Microsoft.Extensions.AI.TextContent;
 
-namespace Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests;
+namespace Microsoft.Agents.AI.Foundry.UnitTests.Hosting;
 
 /// <summary>
 /// Integration tests that verify workflow execution through the

dotnet/tests/Microsoft.Agents.AI.Foundry.UnitTests/Microsoft.Agents.AI.Foundry.UnitTests.csproj

@@ -1,10 +1,24 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <PropertyGroup>
+    <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
+    <NoWarn>$(NoWarn);NU1903;NU1605</NoWarn>
+  </PropertyGroup>
+
   <ItemGroup>
     <PackageReference Include="Azure.AI.Projects" />
     <PackageReference Include="Microsoft.Extensions.Logging" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp'">
+    <PackageReference Include="Azure.AI.AgentServer.Responses" />
+  </ItemGroup>
+
+  <!-- Hosting tests only compile on .NET Core TFMs -->
+  <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp'">
+    <Compile Remove="Hosting\**" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\..\src\Microsoft.Agents.AI.Foundry\Microsoft.Agents.AI.Foundry.csproj" />
   </ItemGroup>

dotnet/tests/Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests/Microsoft.Agents.AI.Hosting.AzureAIResponses.UnitTests.csproj

@@ -1,17 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFrameworks>$(TargetFrameworksCore)</TargetFrameworks>
-    <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
-    <NoWarn>$(NoWarn);NU1903;NU1605</NoWarn>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Azure.AI.AgentServer.Responses" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\src\Microsoft.Agents.AI.Hosting.AzureAIResponses\Microsoft.Agents.AI.Hosting.AzureAIResponses.csproj" />
-  </ItemGroup>
-
-</Project>