Update GitHub.Copilot.SDK to 0.1.25 and use Clone() to replace custom SessionConfig copying

Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>

dotnet/Directory.Packages.props

@@ -92,7 +92,7 @@
     <PackageVersion Include="Microsoft.SemanticKernel.Agents.AzureAI" Version="1.67.0-preview" />
     <PackageVersion Include="Microsoft.SemanticKernel.Plugins.OpenApi" Version="1.67.0" />
     <!-- Agent SDKs -->
-    <PackageVersion Include="GitHub.Copilot.SDK" Version="0.1.23" />
+    <PackageVersion Include="GitHub.Copilot.SDK" Version="0.1.25" />
     <PackageVersion Include="Microsoft.Agents.CopilotStudio.Client" Version="1.3.171-beta" />
     <!-- M365 Agents SDK -->
     <PackageVersion Include="AdaptiveCards" Version="3.1.0" />

dotnet/src/Microsoft.Agents.AI.GitHub.Copilot/GitHubCopilotAgent.cs

@@ -274,32 +274,13 @@ public sealed class GitHubCopilotAgent : AIAgent, IAsyncDisposable
     }
 
     /// <summary>
-    /// Copies all supported properties from a source <see cref="SessionConfig"/> into a new instance
+    /// Clones the given <see cref="SessionConfig"/> and sets <see cref="SessionConfig.Streaming"/> to <c>true</c>.
-    /// with <see cref="SessionConfig.Streaming"/> set to <c>true</c>.
     /// </summary>
     internal static SessionConfig CopySessionConfig(SessionConfig source)
     {
-        return new SessionConfig
+        SessionConfig copy = source.Clone();
-        {
+        copy.Streaming = true;
-            Model = source.Model,
+        return copy;
-            ReasoningEffort = source.ReasoningEffort,
-            Tools = source.Tools,
-            SystemMessage = source.SystemMessage,
-            AvailableTools = source.AvailableTools,
-            ExcludedTools = source.ExcludedTools,
-            Provider = source.Provider,
-            OnPermissionRequest = source.OnPermissionRequest,
-            OnUserInputRequest = source.OnUserInputRequest,
-            Hooks = source.Hooks,
-            WorkingDirectory = source.WorkingDirectory,
-            ConfigDir = source.ConfigDir,
-            McpServers = source.McpServers,
-            CustomAgents = source.CustomAgents,
-            SkillDirectories = source.SkillDirectories,
-            DisabledSkills = source.DisabledSkills,
-            InfiniteSessions = source.InfiniteSessions,
-            Streaming = true
-        };
     }
 
     /// <summary>

dotnet/tests/Microsoft.Agents.AI.GitHub.Copilot.UnitTests/GitHubCopilotAgentTests.cs

@@ -137,7 +137,7 @@ public sealed class GitHubCopilotAgentTests
         // Assert
         Assert.Equal("gpt-4o", result.Model);
         Assert.Equal("high", result.ReasoningEffort);
-        Assert.Same(tools, result.Tools);
+        Assert.Equal(tools, result.Tools);
         Assert.Same(systemMessage, result.SystemMessage);
         Assert.Equal(new List<string> { "tool1", "tool2" }, result.AvailableTools);
         Assert.Equal(new List<string> { "tool3" }, result.ExcludedTools);
@@ -147,7 +147,7 @@ public sealed class GitHubCopilotAgentTests
         Assert.Same(infiniteSessions, result.InfiniteSessions);
         Assert.Same(permissionHandler, result.OnPermissionRequest);
         Assert.Same(userInputHandler, result.OnUserInputRequest);
-        Assert.Same(mcpServers, result.McpServers);
+        Assert.Equal(mcpServers, result.McpServers);
         Assert.Equal(new List<string> { "skill1" }, result.DisabledSkills);
         Assert.True(result.Streaming);
     }