.Net: Fix: Surface Ollama reasoning ("thinking") content in ChatMessageContent

dotnet/src/Connectors/Connectors.Ollama.UnitTests/Services/OllamaChatCompletionTests.cs

@@ -767,6 +767,28 @@ static Task MutateChatHistory(AutoFunctionInvocationContext context, Func<AutoFu
         Assert.Contains("\"result\":\"rainy\"", functionResult.GetProperty("content").GetString());
     }
 
+    [Fact]
+    public async Task GetChatMessageContentShouldIncludeThinkingWhenPresentInResponseAsync()
+    {
+        using var response = new HttpResponseMessage(System.Net.HttpStatusCode.OK)
+        {
+            Content = new StreamContent(File.OpenRead("TestData/chat_completion_with_thinking_response.txt"))
+        };
+
+        this._multiMessageHandlerStub.ResponsesToReturn = [response];
+
+        var sut = Kernel.CreateBuilder()
+            .AddOllamaChatCompletion("test-model", this._httpClient)
+            .Build()
+            .GetRequiredService<IChatCompletionService>();
+
+        // Act
+        var result = await sut.GetChatMessageContentAsync("test prompt");
+
+        // Assert
+        Assert.Contains("This is reasoning content", result.Content);
+    }
+
     private sealed class AutoFunctionInvocationFilter : IAutoFunctionInvocationFilter
     {
         private readonly Func<AutoFunctionInvocationContext, Func<AutoFunctionInvocationContext, Task>, Task> _callback;

dotnet/src/Connectors/Connectors.Ollama.UnitTests/TestData/chat_completion_with_thinking_response.txt

@@ -0,0 +1,2 @@
+{"model":"qwen3:0.6b","message":{"role":"assistant","content":"Final answer","thinking":"This is reasoning content"},"done":false}
+{"model":"qwen3:0.6b","message":{"role":"assistant","content":"","thinking":""},"done":true}

dotnet/src/InternalUtilities/meai/Extensions/ChatMessageExtensions.cs

@@ -23,6 +23,24 @@ internal static ChatMessageContent ToChatMessageContent(this ChatMessage message
             Role = new AuthorRole(message.Role.Value),
         };
 
+        if (response?.RawRepresentation is not null)
+        {
+            var raw = response.RawRepresentation;
+            var messageProp = raw.GetType().GetProperty("Message");
+            var messageObj = messageProp?.GetValue(raw);
+            var thinkingProp = messageObj?.GetType().GetProperty("Thinking");
+            var thinking = thinkingProp?.GetValue(messageObj) as string;
+
+            if (!string.IsNullOrWhiteSpace(thinking))
+            {
+                result.Items.Add(new Microsoft.SemanticKernel.TextContent($"[THINKING]\n{thinking}")
+                {
+                    ModelId = response?.ModelId,
+                    InnerContent = raw
+                });
+            }
+        }
+
         foreach (AIContent content in message.Contents)
         {
 #pragma warning disable SKEXP0001 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.