Feat use native anthropic format api

README.md

@@ -15,6 +15,42 @@
 - **GitHub Actions Integration**: Trigger Claude Code tasks in your GitHub workflows.
 - **Plugin System**: Extend functionality with custom transformers.
 
+## ✨ Anthropic Passthrough Support
+
+The router now supports two backend formats:
+- **OpenAI Format**: Converts Anthropic requests to OpenAI-compatible format (default)
+- **Anthropic Format**: Directly passes through original Anthropic requests (new feature)
+
+### Configuration
+
+Use `anthropicPassthrough` transformer to enable Anthropic passthrough mode:
+
+```json
+{
+  "Providers": [
+    {
+      "name": "openai",
+      "api_base_url": "https://api.openai.com/v1",
+      "api_key": "your-openai-api-key",
+      "models": ["gpt-4o", "gpt-4o-mini"]
+    },
+    {
+      "name": "anthropic-official",
+      "api_base_url": "https://api.anthropic.com",
+      "api_key": "your-anthropic-api-key",
+      "models": ["claude-3-5-sonnet-20241022", "claude-3-5-haiku-20241022"],
+      "transformer": {
+        "use": ["anthropicPassthrough"]
+      }
+    }
+  ]
+}
+```
+
+**API URL Configuration:**
+- **Basic URL (recommended)**: `"https://api.anthropic.com"` → auto-adds `/v1/messages`
+- **Full URL**: `"https://api.example.com/v1/messages"` → uses as-is
+
 ## 🚀 Getting Started
 
 ### 1. Installation
@@ -233,6 +269,7 @@ Transformers allow you to modify the request and response payloads to ensure com
 
 **Available Built-in Transformers:**
 
+- `anthropicpassthrough`: Enables direct passthrough to Anthropic API without format conversion.
 - `deepseek`: Adapts requests/responses for DeepSeek API.
 - `gemini`: Adapts requests/responses for Gemini API.
 - `openrouter`: Adapts requests/responses for OpenRouter API.

README_zh.md

@@ -12,6 +12,43 @@
 -   **动态模型切换**: 在 Claude Code 中使用 `/model` 命令动态切换模型。
 -   **GitHub Actions 集成**: 在您的 GitHub 工作流程中触发 Claude Code 任务。
 -   **插件系统**: 使用自定义转换器扩展功能。
+-   **Anthropic 直通**: 支持原始 Anthropic API 格式的直接透传，提供完整的流式体验。
+
+## ✨ Anthropic 直通支持
+
+路由器现在支持两种后端格式：
+- **OpenAI 格式**: 将 Anthropic 请求转换为 OpenAI 兼容格式（默认）
+- **Anthropic 格式**: 直接透传原始 Anthropic 请求到后端（新功能）
+
+### 配置方法
+
+使用 `anthropicPassthrough` transformer 来启用 Anthropic 直通模式：
+
+```json
+{
+  "Providers": [
+    {
+      "name": "openai",
+      "api_base_url": "https://api.openai.com/v1",
+      "api_key": "your-openai-api-key",
+      "models": ["gpt-4o", "gpt-4o-mini"]
+    },
+    {
+      "name": "anthropic-official",
+      "api_base_url": "https://api.anthropic.com",
+      "api_key": "your-anthropic-api-key",
+      "models": ["claude-3-5-sonnet-20241022", "claude-3-5-haiku-20241022"],
+      "transformer": {
+        "use": ["anthropicPassthrough"]
+      }
+    }
+  ]
+}
+```
+
+**API URL 配置：**
+- **基础 URL（推荐）**: `"https://api.anthropic.com"` → 自动添加 `/v1/messages`
+- **完整 URL**: `"https://api.example.com/v1/messages"` → 直接使用
 
 ## 🚀 快速入门
 
@@ -228,6 +265,7 @@ Transformers 允许您修改请求和响应负载，以确保与不同提供商
 
 **可用的内置 Transformer：**
 
+-   `anthropicpassthrough`: 启用 Anthropic API 直通模式，不进行格式转换。
 -   `deepseek`: 适配 DeepSeek API 的请求/响应。
 -   `gemini`: 适配 Gemini API 的请求/响应。
 -   `openrouter`: 适配 OpenRouter API 的请求/响应。

src/constants.ts

@@ -17,4 +17,8 @@ export const DEFAULT_CONFIG = {
   OPENAI_API_KEY: "",
   OPENAI_BASE_URL: "",
   OPENAI_MODEL: "",
+  Providers: [],
+  Router: {
+    default: ""
+  }
 };

src/index.ts

@@ -97,6 +97,7 @@ async function run(options: RunOptions = {}) {
   server.addHook("preHandler", async (req, reply) =>
     router(req, reply, config)
   );
+
   server.start();
 }
 

src/utils/index.ts

@@ -62,6 +62,7 @@ export const readConfigFile = async () => {
       const APIKEY = await question("Enter Provider API KEY: ");
       const baseUrl = await question("Enter Provider URL: ");
       const model = await question("Enter MODEL Name: ");
+
       const config = Object.assign({}, DEFAULT_CONFIG, {
         Providers: [
           {

src/utils/router.ts

@@ -97,6 +97,7 @@ const getUseModel = async (req: any, tokenCount: number, config: any) => {
   return config.Router!.default;
 };
 
+
 export const router = async (req: any, _res: any, config: any) => {
   const { messages, system = [], tools }: MessageCreateParamsBase = req.body;
   try {
@@ -118,6 +119,7 @@ export const router = async (req: any, _res: any, config: any) => {
     if (!model) {
       model = await getUseModel(req, tokenCount, config);
     }
+
     req.body.model = model;
   } catch (error: any) {
     log("Error in router middleware:", error.message);