feat: support code interpreter (#157)

* chore: code clean up

* feat: support code interpreter

Author: ikesnowy

README.md

@@ -175,6 +175,7 @@ Console.WriteLine($"Image token usage: {raw?.Usage?.ImageTokens}");
   - [Tool Calling](#tool-calling)
   - [Prefix Completion](#prefix-completion)
   - [Long Context (Qwen-Long)](#long-context-qwen-long)
+  - [Code Interpreter](#code-interpreter)
 - [Multimodal](#multimodal) - QWen-VL, QVQ, etc. Supports reasoning/visual understanding/OCR/audio understanding
   - [Upload file for multimodal usage](#upload-file-for-multimodal-usage)
   - [Image Recognition/Thinking](#image-recognition/thinking)
@@ -595,7 +596,118 @@ Console.WriteLine(completion.Output.Choices[0].Message.Content);
 await dashScopeClient.OpenAiCompatibleDeleteFileAsync(uploadedFile.Id);
 ```
 
+### Code Interpreter
+
+**This capability is mutually exclusive with Function Call and cannot be used simultaneously.**
+
+Use the `EnableCodeInterpreter` parameter in `Parameters` to allow the model to write code and call an internal code interpreter for calculations.
+
+Example Request:
+
+```csharp
+var completion = client.GetTextCompletionStreamAsync(
+    new ModelRequest<TextGenerationInput, ITextGenerationParameters>()
+    {
+        Model = "qwen3-max-preview",
+        Input = new TextGenerationInput() { Messages = messages },
+        Parameters = new TextGenerationParameters()
+        {
+            ResultFormat = "message",
+            EnableThinking = true,
+            EnableCodeInterpreter = true,
+            IncrementalOutput = true
+        }
+    });
+```
+
+The code that model generated will be included in `chunk.Output.ToolInfo.CodeInterpreter`. The invocation process can be considered part of the reasoning process.
+
+Full example, 
+
+```csharp
+var messages = new List<TextChatMessage>();
+const string input = "123的21次方是多少？";
+Console.Write($"User > {input}");
+messages.Add(TextChatMessage.User(input));
+var completion = client.GetTextCompletionStreamAsync(
+    new ModelRequest<TextGenerationInput, ITextGenerationParameters>
+    {
+        Model = "qwen3-max-preview",
+        Input = new TextGenerationInput { Messages = messages },
+        Parameters = new TextGenerationParameters
+        {
+            ResultFormat = "message",
+            EnableThinking = true,
+            EnableCodeInterpreter = true,
+            IncrementalOutput = true
+        }
+    });
+var reply = new StringBuilder();
+var codeGenerated = false;
+var reasoning = false;
+TextGenerationTokenUsage? usage = null;
+await foreach (var chunk in completion)
+{
+    var choice = chunk.Output.Choices![0];
+    var tool = chunk.Output.ToolInfo?.FirstOrDefault();
+    if (codeGenerated == false && tool?.CodeInterpreter != null)
+    {
+        Console.WriteLine($"Code > {tool.CodeInterpreter.Code}");
+        codeGenerated = true;
+    }
+
+    if (string.IsNullOrEmpty(choice.Message.ReasoningContent) == false)
+    {
+        // reasoning
+        if (reasoning == false)
+        {
+            Console.WriteLine();
+            Console.Write("Reasoning > ");
+            reasoning = true;
+        }
+
+        Console.Write(choice.Message.ReasoningContent);
+        continue;
+    }
+
+    if (reasoning && string.IsNullOrEmpty(choice.Message.Content.Text) == false)
+    {
+        reasoning = false;
+        Console.WriteLine();
+        Console.Write("Assistant > ");
+    }
+
+    Console.Write(choice.Message.Content);
+    reply.Append(choice.Message.Content);
+    usage = chunk.Usage;
+}
+
+Console.WriteLine();
+messages.Add(TextChatMessage.Assistant(reply.ToString()));
+if (usage != null)
+{
+    Console.WriteLine(
+        $"Usage: in({usage.InputTokens})/out({usage.OutputTokens})/reasoning({usage.OutputTokensDetails?.ReasoningTokens})/plugins({usage.Plugins?.CodeInterpreter?.Count})/total({usage.TotalTokens})");
+}
+
+/*
+User > 123的21次方是多少？
+Reasoning > 用户问的是123的21次方是多少。这是一个大数计算问题，我需要使用代码计算器来计算这个值。
+
+我需要调用code_interpreter函数，传入计算123**21的Python代码。
+123**21
+用户询问123的21次方是多少，我使用代码计算器计算出了结果。结果是一个非常大的数字：77269364466549865653073473388030061522211723
+
+我应该直接给出这个结果，因为这是一个精确的数学计算问题，不需要额外的解释或
+Assistant > 123的21次方是：77269364466549865653073473388030061522211723
+Usage: in(704)/out(234)/reasoning(142)/plugins(1)/total(938)
+*/
+```
+
+
+
 ## Multimodal
+
 Use `GetMultimodalGenerationAsync`/`GetMultimodalGenerationStreamAsync`
 [Official Documentation](https://help.aliyun.com/zh/model-studio/multimodal)