README.md

@@ -123,7 +123,6 @@ _✨ 支持多API预设、MCP协议、内置工具、联网搜索、视觉模型
 | LLMCHAT__DEFAULT_PRESET | 否 | off | 默认使用的预设名称，配置为off则为关闭 |
 | LLMCHAT__RANDOM_TRIGGER_PROB | 否 | 0.05 | 默认随机触发概率 [0, 1] |
 | LLMCHAT__DEFAULT_PROMPT | 否 | 你的回答应该尽量简洁、幽默、可以使用一些语气词、颜文字。你应该拒绝回答任何政治相关的问题。 | 默认提示词 |
-| LLMCHAT__MCP_SERVER_CWD | 否 | 无 | command类型MCP服务器全局工作目录（cwd） |
 | LLMCHAT__BLACKLIST_USER_IDS | 否 | [] | 黑名单用户ID列表，机器人将不会处理黑名单用户的消息 |
 | LLMCHAT__IGNORE_PREFIXES | 否 | [] | 需要忽略的消息前缀列表，匹配到这些前缀的消息不会处理 |
 | LLMCHAT__MCP_SERVERS | 否 | {} | MCP服务器配置，具体见下表 |
@@ -166,11 +165,10 @@ LLMCHAT__MCP_SERVERS同样为一个dict，key为服务器名称，value配置的
 | 配置项 | 必填 | 默认值 | 说明 |
 |:-----:|:----:|:----:|:----:|
 | command | stdio服务器必填 | 无 | stdio服务器MCP命令 |
-| args | 否 | [] | stdio服务器MCP命令参数 |
+| arg | 否 | [] | stdio服务器MCP命令参数 |
 | env | 否 | {} | stdio服务器环境变量 |
-| url | 远程服务器必填 | 无 | 远程MCP服务器地址 |
+| url | sse服务器必填 | 无 | sse服务器地址 |
-| headers | 否 | {} | 远程服务器http请求头，用于认证或其他设置 |
+| headers | 否 | {} | sse模式下http请求头，用于认证或其他设置 |
-| transport | 否 | 自动 | 远程MCP传输协议类型，可选 `sse` 或 `streamable_http` ，不填则自动探测 |
 
 以下为在 Claude.app 的MCP服务器配置基础上增加的字段
 | 配置项 | 必填 | 默认值 | 说明 |
@@ -256,12 +254,6 @@ LLMCHAT__MCP_SERVERS同样为一个dict，key为服务器名称，value配置的
                 "formulahendry/mcp-server-code-runner"
             ]
         },
-        "tavily": {
-            "friendly_name": "Tavily搜索",
-            "additional_prompt": "当你需要搜索最新的互联网信息时，请使用 tavily 工具。",
-            "url": "https://mcp.tavily.com/mcp/?tavilyApiKey=<your-api-key>",
-            "transport": "streamable_http"
-        }
     }
     '
     

nonebot_plugin_llmchat/__init__.py

@@ -349,7 +349,6 @@ async def process_messages(context_id: int, is_group: bool = True):
     logger.info(
         f"开始处理{chat_type}消息 {context_type}：{context_id} 当前队列长度：{state.queue.qsize()}"
     )
-    try:
     while not state.queue.empty():
         event = await state.queue.get()
         if is_group:
@@ -359,10 +358,7 @@ async def process_messages(context_id: int, is_group: bool = True):
             logger.debug(f"从队列获取消息 用户：{context_id} 消息ID：{event.message_id}")
             group_id = None
         past_events_snapshot = []
-            mcp_client = MCPClient.get_instance(
+        mcp_client = MCPClient.get_instance(plugin_config.mcp_servers)
-                plugin_config.mcp_servers,
-                plugin_config.mcp_server_cwd,
-            )
         try:
             # 构建系统提示，分成多行以满足行长限制
             chat_type = "群聊" if is_group else "私聊"
@@ -604,11 +600,10 @@ async def process_messages(context_id: int, is_group: bool = True):
             state.past_events.extendleft(reversed(past_events_snapshot))
             await handler.send(Message(f"服务暂时不可用，请稍后再试\n{e!s}"))
         finally:
+            state.processing = False
             state.queue.task_done()
             # 不再需要每次都清理MCPClient，因为它现在是单例
             # await mcp_client.cleanup()
-    finally:
-        state.processing = False
 
 
 # 预设切换命令

nonebot_plugin_llmchat/config.py

@@ -24,9 +24,8 @@ class MCPServerConfig(BaseModel):
     command: str | None = Field(None, description="stdio模式下MCP命令")
     args: list[str] | None = Field([], description="stdio模式下MCP命令参数")
     env: dict[str, str] | None = Field({}, description="stdio模式下MCP命令环境变量")
-    url: str | None = Field(None, description="远程MCP服务器地址")
+    url: str | None = Field(None, description="sse模式下MCP服务器地址")
-    headers: dict[str, str] | None = Field({}, description="远程MCP服务器http请求头，用于认证或其他设置")
+    headers: dict[str, str] | None = Field({}, description="sse模式下http请求头，用于认证或其他设置")
-    transport: str | None = Field(None, description="远程MCP传输协议类型，可选 'sse' 或 'streamable_http'，默认自动检测")
 
     # 额外字段
     friendly_name: str | None = Field(None, description="MCP服务器友好名称")
@@ -49,10 +48,6 @@ class ScopedConfig(BaseModel):
         "你的回答应该尽量简洁、幽默、可以使用一些语气词、颜文字。你应该拒绝回答任何政治相关的问题。",
         description="默认提示词",
     )
-    mcp_server_cwd: str | None = Field(
-        None,
-        description="command类型MCP服务器的全局工作目录（cwd）"
-    )
     mcp_servers: dict[str, MCPServerConfig] = Field({}, description="MCP服务器配置")
     blacklist_user_ids: set[int] = Field(set(), description="黑名单用户ID列表")
     ignore_prefixes: list[str] = Field(

nonebot_plugin_llmchat/mcpclient.py

@@ -3,11 +3,9 @@ from contextlib import AsyncExitStack
 from time import monotonic
 from typing import Any, cast
 
-import httpx
 from mcp import ClientSession, StdioServerParameters
 from mcp.client.sse import sse_client
 from mcp.client.stdio import stdio_client
-from mcp.client.streamable_http import streamable_http_client
 from nonebot import logger
 
 from .config import MCPServerConfig
@@ -20,20 +18,12 @@ class MCPClient:
     _SESSION_TTL_SECONDS = 600
     _SESSION_CLEANUP_INTERVAL_SECONDS = 60
 
-    def __new__(
+    def __new__(cls, server_config: dict[str, MCPServerConfig] | None = None):
-        cls,
-        server_config: dict[str, MCPServerConfig] | None = None,
-        default_command_cwd: str | None = None,
-    ):
         if cls._instance is None:
             cls._instance = super().__new__(cls)
         return cls._instance
 
-    def __init__(
+    def __init__(self, server_config: dict[str, MCPServerConfig] | None = None):
-        self,
-        server_config: dict[str, MCPServerConfig] | None = None,
-        default_command_cwd: str | None = None,
-    ):
         if self._initialized:
             return
 
@@ -42,7 +32,6 @@ class MCPClient:
 
         logger.info(f"正在初始化MCPClient单例，共有{len(server_config)}个服务器配置")
         self.server_config = server_config
-        self.default_command_cwd = default_command_cwd
         self.sessions = {}
         self.exit_stack = AsyncExitStack()
         self._session_exit_stacks: dict[str, AsyncExitStack] = {}
@@ -58,16 +47,12 @@ class MCPClient:
         logger.debug("MCPClient单例初始化成功")
 
     @classmethod
-    def get_instance(
+    def get_instance(cls, server_config: dict[str, MCPServerConfig] | None = None):
-        cls,
-        server_config: dict[str, MCPServerConfig] | None = None,
-        default_command_cwd: str | None = None,
-    ):
         """获取MCPClient实例"""
         if cls._instance is None:
             if server_config is None:
                 raise ValueError("server_config must be provided for first initialization")
-            cls._instance = cls(server_config, default_command_cwd)
+            cls._instance = cls(server_config)
         return cls._instance
 
     @classmethod
@@ -90,45 +75,13 @@ class MCPClient:
         config = self.server_config[server_name]
         session_stack = AsyncExitStack()
         if config.url:
-            transport_type = config.transport
+            transport = await session_stack.enter_async_context(
-            if transport_type == "streamable_http":
+                sse_client(url=config.url, headers=config.headers)
-                logger.debug(f"服务器[{server_name}]使用 streamable_http 传输协议")
-                http_client = await session_stack.enter_async_context(httpx.AsyncClient(headers=config.headers or {}))
-                read, write, _ = await session_stack.enter_async_context(
-                    streamable_http_client(url=config.url, http_client=http_client)
             )
-                transport = (read, write)
-            elif transport_type == "sse":
-                logger.debug(f"服务器[{server_name}]使用 sse 传输协议")
-                transport = await session_stack.enter_async_context(sse_client(url=config.url, headers=config.headers))
-            else:
-                # 未指定协议，自动探测：先尝试 sse，失败则回退到 streamable_http
-                # （sse 服务器对 streamable_http 的 POST 请求会卡住，反之 sse 连 streamable_http 服务器会快速返回 405）
-                logger.debug(f"服务器[{server_name}]未指定传输协议，开始自动探测")
-                probe_stack = AsyncExitStack()
-                try:
-                    read, write = await probe_stack.enter_async_context(sse_client(url=config.url, headers=config.headers))
-                    await session_stack.enter_async_context(probe_stack)
-                    transport = (read, write)
-                    logger.debug(f"服务器[{server_name}]自动探测成功: 使用 sse 传输协议")
-                except Exception as e:
-                    await probe_stack.aclose()
-                    logger.debug(f"服务器[{server_name}]sse 探测失败({e})，回退到 streamable_http")
-                    http_client = await session_stack.enter_async_context(httpx.AsyncClient(headers=config.headers or {}))
-                    read, write, _ = await session_stack.enter_async_context(
-                        streamable_http_client(url=config.url, http_client=http_client)
-                    )
-                    transport = (read, write)
-                    logger.debug(f"服务器[{server_name}]自动探测成功: 使用 streamable_http 传输协议")
         elif config.command:
-            stdio_params: dict[str, Any] = {
+            transport = await session_stack.enter_async_context(
-                "command": config.command,
+                cast(Any, stdio_client(StdioServerParameters(**config.model_dump())))
-                "args": config.args or [],
+            )
-                "env": config.env or {},
-            }
-            if self.default_command_cwd:
-                stdio_params["cwd"] = self.default_command_cwd
-            transport = await session_stack.enter_async_context(cast(Any, stdio_client(StdioServerParameters(**stdio_params))))
         else:
             raise ValueError("Server config must have either url or command")
 
@@ -226,6 +179,8 @@ class MCPClient:
 
             logger.info(f"工具列表缓存完成，共缓存{len(available_tools)}个工具")
 
+
+
     async def get_available_tools(self, is_group: bool):
         """获取可用工具列表，使用缓存机制"""
         await self.init_tools_cache()

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "nonebot-plugin-llmchat"
-version = "0.5.4"
+version = "0.5.2"
 description = "Nonebot AI group chat plugin supporting multiple API preset configurations"
 license = "GPL"
 authors = ["FuQuan i@fuquan.moe"]
@@ -18,7 +18,7 @@ aiofiles = ">=24.0.0"
 nonebot-plugin-apscheduler = "^0.5.0"
 nonebot-adapter-onebot = "^2.0.0"
 nonebot-plugin-localstore = "^0.7.3"
-mcp = ">=1.24.0"
+mcp = "^1.6.0"
 
 [tool.poetry.group.dev.dependencies]
 ruff = "^0.8.0"