diff --git a/docs/wechat_ipad多版本Server适配路线图.md b/docs/wechat_ipad多版本Server适配路线图.md
index a623b61..3931013 100644
--- a/docs/wechat_ipad多版本Server适配路线图.md
+++ b/docs/wechat_ipad多版本Server适配路线图.md
@@ -20,33 +20,37 @@
 - 已新增 [wechat_ipad/provider_base.py](/d:/learn/abot/wechat_ipad/provider_base.py:1)
 - 已新增 `providers/legacy_855/` 独立目录，并迁入当前 855/859 协议实现
 - 已将 [robot.py](/d:/learn/abot/robot.py:1) 的接入实例化入口切换为 `WechatGateway`
+- 已新增 [wechat_ipad/providers/legacy_855/runtime.py](/d:/learn/abot/wechat_ipad/providers/legacy_855/runtime.py:1)
+- 已将 855 的登录、历史消息拉取、心跳、长心跳、消息轮询、掉线二次登录恢复迁入 `legacy_855` provider
+- 已将 [robot.py](/d:/learn/abot/robot.py:1) 精简为“注册回调 + 业务处理”，不再直接维护 855 的运行时主循环
+- 已补上 `Legacy855WechatClient` 的显式初始化入口，避免 provider 多继承构造链不稳定
 
 当前尚未完成的关键项：
 
-- `Robot` 中的登录、心跳、长心跳、消息轮询、掉线恢复逻辑仍未完全迁入 855 provider
-- `legacy_855` 目录内尚未补充独立的 `runtime.py` 收口运行时模型
 - 855 provider 仍需完成一轮“当前项目实际依赖接口”的可上线回归验证
+- 855 provider 仍需继续梳理“项目真实使用到的接口覆盖面”，确认是否还有遗漏的旧能力残留在历史目录
+- 864 provider 尚未开始接入，当前统一接口仍主要围绕 855 第一阶段目标进行验证
 
 因此，当前状态可以定义为：
 
 - “接入入口已收口”
-- “运行时主链路迁移进行中”
+- “855 运行时主链路已迁入 provider”
 - “尚未达到 855 可直接替换现网上线的最终状态”
 
 ## 2. 当前问题概览
 
 ### 2.1 当前耦合点
 
-当前微信接入实现存在以下特点：
+当前微信接入实现仍需关注以下历史耦合点与残留影响：
 
 - [robot.py](/d:/learn/abot/robot.py:221) 直接读取 `wechat_ipad/config.toml`
-- [robot.py](/d:/learn/abot/robot.py:263) 直接实例化 `wechat_ipad.WechatAPIClient`
-- `Robot` 自己承担了登录、心跳、长心跳、消息轮询、掉线恢复等运行时职责
-- `wechat_ipad/client/*.py` 直接面向当前 server 协议编写，接口路径、请求体、返回结构都写死
+- `Robot` 的实例化入口虽然已切到 `WechatGateway`，但配置读取与业务初始化仍在主程序中
+- 855 的运行时职责已经迁入 provider，但 864 尚未接入验证，统一抽象仍需继续收敛
+- `wechat_ipad/client/*.py` 仍作为历史目录存在，接口路径、请求体、返回结构都面向旧 server 编写
 
 这导致一个结果：
 
-- 一旦 server 版本变化，不只是 `client` 要改，`Robot` 主链路也要跟着改
+- 如果继续在历史目录或 `Robot` 主链路里堆版本判断，后续 server 版本变化时改动面仍会再次放大
 
 ### 2.2 855 / 864 的核心差异
 
diff --git a/robot.py b/robot.py
index 426e3ff..6611007 100644
--- a/robot.py
+++ b/robot.py
@@ -6,8 +6,6 @@ import tomllib
 import traceback
 import uuid
 from collections import deque
-
-import toml
 from loguru import logger
 
 import wechat_ipad
@@ -271,145 +269,119 @@ class Robot:
             server_type = str(self.ipad_config.get("server_type", "legacy_855") or "legacy_855").strip()
             self.ipad_bot = WechatGateway(server_ip, server_port, server_type=server_type)
             self.message_auto_revoke = MessageAutoRevoke(self.ipad_bot)
-            wxid = self.ipad_config.get("wxid", "")
-            device_name = self.ipad_config.get("device_name", "")
-            device_id = self.ipad_config.get("device_id", "")
-
-            if device_name == "":
-                device_name = self.ipad_bot.create_device_name()
-            if device_id == "":
-                device_id = self.ipad_bot.create_device_id()
-
-            # 登录逻辑
-            if not await self.ipad_bot.is_logged_in(wxid):
-                await self._handle_ipad_login(wxid, device_name, device_id)
-            else:  # 已登录
-                self.ipad_bot.wxid = wxid
-                profile = await self.ipad_bot.get_profile()
-                self.ipad_bot.nickname = profile.get("NickName").get("string")
-                self.ipad_bot.alias = profile.get("Alias")
-                self.ipad_bot.phone = profile.get("BindMobile").get("string")
-                self.ipad_bot.signature = profile.get("Signature", "")
-                # 更新Robot类的属性
-                self.wxid = self.ipad_bot.wxid
-                self.nickname = self.ipad_bot.nickname
-                self.alias = self.ipad_bot.alias
-                self.phone = self.ipad_bot.phone
-                self.signature = self.ipad_bot.signature
-
-                self.LOG.info(
-                    f"wechat_ipad登录账号信息: wxid: {self.wxid}  昵称: {self.nickname}  微信号: {self.alias}  手机号: {self.phone}")
-
-            # 注入加载完成的bot
-            self.plugin_manager.inject_bot(self.ipad_bot)
-            self.LOG.info(f"wechat_ipad登录设备信息: device_name: {device_name}  device_id: {device_id}")
-            self.LOG.info("wechat_ipad登录成功")
-
-            # 登录成功后加载联系人信息
-            self.allContacts = self.get_all_contacts()
-            friends = await self.ipad_bot.get_contract_list()
-            self.head_images = self.get_all_head_images()
-            self.all_chatroom_members = self.contacts_db.get_chatroom_member_list_name_all()
-            # self.LOG.debug(f"all_chatroom_members:{self.all_chatroom_members}")
-            self.contact_manager.set_contacts(self.allContacts, friends, self.head_images, self.all_chatroom_members)
-
-            self.message_storage = MessageStorage(self.ipad_bot)
-            self.member_monitor = ChatroomMemberMonitor(self.ipad_bot)
-            # # 获取扩展信息，显示相关内容
-            ext_profile = await self.ipad_bot.get_profile_info_ext()
-            self.ipad_bot.profile_ext = ext_profile
-            self.head_image = ext_profile.get("SmallHeadImgUrl")
-
-            # 先接受堆积消息
-            self.LOG.info("处理堆积消息中")
-
-            # await self.ipad_bot.send_text_message("filehelper", "ipad客户端启动成功")
-            count = 0
-            while True:
-                data = await self.ipad_bot.sync_message()
-                data = data.get("AddMsgs")
-                if not data:
-                    if count > 2:
-                        break
-                    else:
-                        count += 1
-                        continue
-
-                self.LOG.debug(f"接受到 {len(data)} 条历史消息，开始仅落库归档")
-                for raw_message in data:
-                    await self._archive_startup_history_message(raw_message)
-                await asyncio.sleep(1)
-            self.LOG.info("处理堆积消息完毕")
-
-            # 标记为运行中
-            self.ipad_running = True
-            # 开启自动心跳（作为后台任务）
-            heartbeat_task = asyncio.create_task(self._heartbeat_task())
-            heartbeat_task_long = asyncio.create_task(self._heartbeat_task_long())
-            # 开始处理消息
-            self.LOG.info("开始处理wechat_ipad消息")
-            while self.ipad_running:
-                try:
-                    data_temp = await self.ipad_bot.sync_message()
-                except Exception as e:
-                    self.LOG.error(f"获取新消息失败 {e}")
-                    if "用户可能退出" in str(e):
-                        self.LOG.error(f"用户可能退出: {e}")
-                        self.email_sender.send_wechat_alert(self.config.email.get("alert_recipient"),
-                                                            f"用户可能退出: {e}", self.wxid,
-                                                            self.nickname)
-                        await self.login_twice_auto_auth()
-                    await asyncio.sleep(5)
-                    continue
-
-                data = data_temp.get("AddMsgs")
-                if data:
-                    for message in data:
-                        # self.LOG.debug(f"sync_message.处理消息消息内容: {message}")
-                        # 处理消息
-                        try:
-                            wxmsg: WxMessage = WxMessage.from_json(message)
-                            self._attach_trace_id(wxmsg)
-                            # 判断是否已经收到过。处理。存储最近20个msg_id，处理之前判断是否在清单里面，如果在，这不重新处理了。
-                            msg_id = wxmsg.msg_id
-                            if msg_id in self.recent_msg_ids:
-                                self.LOG.info(self._trace_message(wxmsg, f"出现重复ID消息: {msg_id}"))
-                                continue  # 已处理，跳过
-                            self.recent_msg_ids.append(msg_id)
-                            self.LOG.debug(
-                                self._trace_message(
-                                    wxmsg,
-                                    f"收到消息 type={getattr(wxmsg.msg_type, 'name', wxmsg.msg_type)} "
-                                    f"sender={wxmsg.sender} room={wxmsg.roomid or '-'}"
-                                )
-                            )
-                        except Exception as e:
-                            self.LOG.error(f"WxMessage.from_json 解析失败，消息内容: {message}，错误: {e}")
-                            continue  # 跳过本条消息，继续处理下一条
-                        # 创建独立任务，不阻塞下一条消息
-                        # 并发执行，限制最大并发数
-                        xx = asyncio.create_task(self._process_with_semaphore(wxmsg))
-                else:
-                    # 只有当 Ret 不等于 0 或者 不包含 KeyBuf 时才打印
-                    if not (isinstance(data_temp, dict) and data_temp.get("Ret") == 0 and "KeyBuf" in data_temp):
-                        self.LOG.debug(f"MESSAGE：{data_temp}")
-
-                        changed_groups = self.member_monitor.parse_mod_contacts_msg(data_temp)
-                        if changed_groups:
-                            self.LOG.info(f"监测到群成员变动消息，涉及群: {changed_groups}")
-                            for group_id in changed_groups:
-                                if self.gbm.get_group_permission(group_id,
-                                                                 Feature.GROUP_MEMBER_CHANGE) == PermissionStatus.ENABLED:
-                                    xx = asyncio.create_task(self.member_monitor.check_and_handle_changes(group_id))
-
-                # 使用异步睡眠替代忙等待循环
-                await asyncio.sleep(2)
+            # 855 provider 现在自行承接运行时模型：
+            # 1. provider 内部负责登录、历史消息拉取、心跳、长心跳、掉线恢复与实时轮询；
+            # 2. Robot 只注册业务回调，继续处理联系人初始化、消息归档、插件调度等项目内逻辑；
+            # 3. 这样未来切到 864 时，主链路只需要替换 provider，而不是继续改这里的大循环。
+            await self.ipad_bot.run_runtime(
+                ipad_config=self.ipad_config,
+                config_path="wechat_ipad/config.toml",
+                logger=self.LOG,
+                on_login_ready=self._on_ipad_login_ready,
+                on_history_message=self._archive_startup_history_message,
+                on_message=self._handle_runtime_message,
+                on_idle_payload=self._handle_runtime_idle_payload,
+                on_logout=self._handle_ipad_logout,
+                on_runtime_state_change=self._handle_runtime_state_change,
+            )
 
         except Exception as e:
             self.LOG.exception(f"wechat_ipad客户端运行出错: {e}")
             self.ipad_running = False
 
-    # 在类里直接写一个内联 async 方法（不额外抽取新的对外方法）
+    async def _on_ipad_login_ready(self, login_identity: dict) -> None:
+        """处理 provider 登录成功后的项目侧初始化动作。
+
+        这里保留在 Robot 的原因很明确：
+        1. 联系人缓存、插件注入、消息归档器、成员监控器都属于项目业务层能力；
+        2. provider 不应该知道本项目有哪些数据库表、后台缓存或插件系统；
+        3. 因此登录“流程”放到 provider，登录后的“业务初始化”继续留在 Robot。
+        """
+        self.wxid = login_identity.get("wxid", "")
+        self.nickname = login_identity.get("nickname", "")
+        self.alias = login_identity.get("alias", "")
+        self.phone = login_identity.get("phone", "")
+        self.signature = login_identity.get("signature", "")
+
+        # 这里同时把 Robot 侧的身份信息镜像回 bot，保证旧代码仍可从 `self.ipad_bot.xxx` 读取。
+        self.ipad_bot.wxid = self.wxid
+        self.ipad_bot.nickname = self.nickname
+        self.ipad_bot.alias = self.alias
+        self.ipad_bot.phone = self.phone
+        self.ipad_bot.signature = self.signature
+        self.LOG.info(
+            f"wechat_ipad登录账号信息: wxid: {self.wxid}  昵称: {self.nickname}  微信号: {self.alias}  手机号: {self.phone}"
+        )
+
+        self.plugin_manager.inject_bot(self.ipad_bot)
+        self.allContacts = self.get_all_contacts()
+        friends = await self.ipad_bot.get_contract_list()
+        self.head_images = self.get_all_head_images()
+        self.all_chatroom_members = self.contacts_db.get_chatroom_member_list_name_all()
+        self.contact_manager.set_contacts(self.allContacts, friends, self.head_images, self.all_chatroom_members)
+
+        self.message_storage = MessageStorage(self.ipad_bot)
+        self.member_monitor = ChatroomMemberMonitor(self.ipad_bot)
+        ext_profile = await self.ipad_bot.get_profile_info_ext()
+        self.ipad_bot.profile_ext = ext_profile
+        self.head_image = ext_profile.get("SmallHeadImgUrl")
+
+    async def _handle_runtime_message(self, raw_message: dict) -> None:
+        """处理 provider 交付的单条实时原始消息。"""
+        try:
+            wxmsg: WxMessage = WxMessage.from_json(raw_message)
+            self._attach_trace_id(wxmsg)
+            msg_id = wxmsg.msg_id
+            if msg_id in self.recent_msg_ids:
+                self.LOG.info(self._trace_message(wxmsg, f"出现重复ID消息: {msg_id}"))
+                return
+            self.recent_msg_ids.append(msg_id)
+            self.LOG.debug(
+                self._trace_message(
+                    wxmsg,
+                    f"收到消息 type={getattr(wxmsg.msg_type, 'name', wxmsg.msg_type)} "
+                    f"sender={wxmsg.sender} room={wxmsg.roomid or '-'}"
+                )
+            )
+        except Exception as e:
+            self.LOG.error(f"WxMessage.from_json 解析失败，消息内容: {raw_message}，错误: {e}")
+            return
+
+        # 这里继续沿用“单条消息单独起任务 + 信号量限流”的项目策略：
+        # 1. 保持与现网处理吞吐一致；
+        # 2. 避免 provider 轮询被某条耗时消息阻塞；
+        # 3. 也不把并发控制职责再塞回 provider，边界更清楚。
+        asyncio.create_task(self._process_with_semaphore(wxmsg))
+
+    async def _handle_runtime_idle_payload(self, data_temp: dict) -> None:
+        """处理 855 空轮询之外的补充同步负载，例如群成员变更通知。"""
+        if isinstance(data_temp, dict) and data_temp.get("Ret") == 0 and "KeyBuf" in data_temp:
+            return
+
+        self.LOG.debug(f"MESSAGE：{data_temp}")
+        changed_groups = self.member_monitor.parse_mod_contacts_msg(data_temp)
+        if changed_groups:
+            self.LOG.info(f"监测到群成员变动消息，涉及群: {changed_groups}")
+            for group_id in changed_groups:
+                if self.gbm.get_group_permission(
+                    group_id,
+                    Feature.GROUP_MEMBER_CHANGE,
+                ) == PermissionStatus.ENABLED:
+                    asyncio.create_task(self.member_monitor.check_and_handle_changes(group_id))
+
+    async def _handle_ipad_logout(self, reason: str) -> None:
+        """处理 provider 识别到的掉线事件，仅负责业务侧告警。"""
+        self.LOG.error(f"用户可能退出: {reason}")
+        self.email_sender.send_wechat_alert(
+            self.config.email.get("alert_recipient"),
+            f"用户可能退出: {reason}",
+            self.wxid,
+            self.nickname,
+        )
+
+    async def _handle_runtime_state_change(self, running: bool) -> None:
+        """镜像 provider 运行态到 Robot，供后台与运维逻辑读取。"""
+        self.ipad_running = running
 
     async def _archive_startup_history_message(self, raw_message: dict) -> None:
         """启动阶段只归档历史消息，不触发实时业务处理。
@@ -471,109 +443,6 @@ class Robot:
             finally:
                 reset_current_trace_id(trace_token)
 
-    async def _handle_ipad_login(self, wxid, device_name, device_id):
-        """处理wechat_ipad登录"""
-        while not await self.ipad_bot.is_logged_in(wxid):
-            # 需要登录
-            try:
-                if await self.ipad_bot.get_cached_info(wxid):
-                    # 尝试唤醒登录
-                    uuid = await self.ipad_bot.awaken_login(wxid)
-                    self.LOG.info(f"获取到登录uuid: {uuid}")
-                else:
-                    # 二维码登录
-                    if not device_name:
-                        device_name = self.ipad_bot.create_device_name()
-                    if not device_id:
-                        device_id = self.ipad_bot.create_device_id()
-                    uuid, url = await self.ipad_bot.get_qr_code(device_id=device_id, device_name=device_name,
-                                                                print_qr=True)
-                    self.LOG.info(f"获取到登录uuid: {uuid}")
-                    self.LOG.info(f"获取到登录二维码: {url}")
-            except Exception as e:
-                self.LOG.error(f"登录过程出错: {e}")
-                # 二维码登录
-                if not device_name:
-                    device_name = self.ipad_bot.create_device_name()
-                if not device_id:
-                    device_id = self.ipad_bot.create_device_id()
-                uuid, url = await self.ipad_bot.get_qr_code(device_id=device_id, device_name=device_name, print_qr=True)
-                self.LOG.info(f"获取到登录uuid: {uuid}")
-                self.LOG.info(f"获取到登录二维码: {url}")
-
-            while True:
-                self.LOG.info(f"uuid: {uuid}, url: {url}")
-                stat, data = await self.ipad_bot.check_login_uuid(uuid, device_id=device_id)
-                if stat:
-                    break
-                self.LOG.info(f"等待登录中，过期倒计时：{data}")
-                await asyncio.sleep(5)
-
-            # 保存登录信息
-            self.ipad_config["wxid"] = self.ipad_bot.wxid
-            self.ipad_config["device_name"] = device_name
-            self.ipad_config["device_id"] = device_id
-            self.ipad_config["login_time"] = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
-            with open("wechat_ipad/config.toml", "w", encoding="utf-8") as f:
-                toml.dump(self.ipad_config, f)
-
-            # 获取登录账号信息
-            self.ipad_bot.wxid = data.get("acctSectResp").get("userName")
-            self.ipad_bot.nickname = data.get("acctSectResp").get("nickName")
-            self.ipad_bot.alias = data.get("acctSectResp").get("alias")
-            self.ipad_bot.phone = data.get("acctSectResp").get("bindMobile")
-            self.ipad_bot.signature = data.get("Signature", "")
-
-            # 更新Robot类的属性
-            self.wxid = self.ipad_bot.wxid
-            self.nickname = self.ipad_bot.nickname
-            self.alias = self.ipad_bot.alias
-            self.phone = self.ipad_bot.phone
-            self.signature = self.ipad_bot.signature
-            self.LOG.info(
-                f"wechat_ipad登录账号信息: wxid: {self.wxid}  昵称: {self.nickname}  微信号: {self.alias}  手机号: {self.phone}")
-            break
-
-    async def _heartbeat_task(self):
-        """wechat_ipad心跳任务"""
-        self.LOG.info("开启wechat_ipad心跳！")
-        while self.ipad_running:
-            try:
-                success = await self.ipad_bot.heartbeat()
-                if success:
-                    self.LOG.debug("心跳进行中")
-                else:
-                    self.LOG.warning("心跳失败")
-            except Exception as e:
-                self.LOG.error(f"wechat_ipad heartbeat: {e}")
-                if "用户可能退出" in str(e):
-                    self.LOG.error(f"用户可能退出: {e}")
-                    self.email_sender.send_wechat_alert(self.config.email.get("alert_recipient"), f"用户可能退出: {e}",
-                                                        self.wxid,
-                                                        self.nickname)
-                    await self.login_twice_auto_auth()
-            await asyncio.sleep(60)
-
-    async def _heartbeat_task_long(self):
-        """wechat_ipad心跳任务"""
-        self.LOG.info("开启wechat_ipad长连接心跳！")
-        while self.ipad_running:
-            try:
-                success = await self.ipad_bot.heartbeat_long()
-                if success:
-                    self.LOG.debug("长连接心跳进行中")
-                else:
-                    self.LOG.warning("长连接心跳失败")
-            except Exception as e:
-                self.LOG.error(f"wechat_ipad heartbeat long: {e}")
-                if "用户可能退出" in str(e):
-                    self.LOG.error(f"用户可能退出: {e}")
-                    self.email_sender.send_wechat_alert(self.config.email.get("alert_recipient"), f"用户可能退出: {e}",
-                                                        self.wxid,
-                                                        self.nickname)
-                    await self.login_twice_auto_auth()
-            await asyncio.sleep(120)
-
     async def _process_ipad_message(self, message: WxMessage):
         """处理wechat_ipad消息"""
         try:
@@ -658,6 +527,8 @@ class Robot:
     def stop_wechat_ipad(self):
         """停止wechat_ipad客户端"""
         self.ipad_running = False
+        if hasattr(self, "ipad_bot") and self.ipad_bot and hasattr(self.ipad_bot, "stop_runtime"):
+            self.ipad_bot.stop_runtime()
         if self.ipad_loop:
             self.ipad_loop.stop()
         self.LOG.info("wechat_ipad客户端已停止")
@@ -999,24 +870,6 @@ class Robot:
                                           self.all_chatroom_members)
         self.LOG.info("联系人信息刷新完成")
 
-    async def login_twice_auto_auth(self) -> None:
-        try:
-            self.LOG.info(f"定时进行二次登录动作")
-            resp = await self.ipad_bot.twice_auto_auth()
-            if resp:
-                self.LOG.info(f"定时二次登录成功！")
-                if self.ipad_running:
-                    self.LOG.info(f"ipad_wechat  running:{self.ipad_running}")
-                else:
-                    self.ipad_running = True
-                    self.LOG.info(f"ipad_wechat  stopped change running:{self.ipad_running}")
-            else:
-                self.LOG.error(f"定时二次登录失败！")
-                self.ipad_running = False
-
-        except Exception as e:
-            self.LOG.error(f"login_twice_auto_auth error: {e}")
-
     # ============================================== 系统级任务（刚需）==========================================================
 
     async def message_count_to_db(self):
diff --git a/wechat_ipad/providers/legacy_855/provider.py b/wechat_ipad/providers/legacy_855/provider.py
index 92d53a6..baa3b0e 100644
--- a/wechat_ipad/providers/legacy_855/provider.py
+++ b/wechat_ipad/providers/legacy_855/provider.py
@@ -5,8 +5,10 @@ from wechat_ipad.providers.legacy_855.friends import FriendMixin
 from wechat_ipad.providers.legacy_855.group import ChatroomMixin
 from wechat_ipad.providers.legacy_855.login import LoginMixin
 from wechat_ipad.providers.legacy_855.message import MessageMixin
+from wechat_ipad.providers.legacy_855.runtime import Legacy855RuntimeMixin
 from wechat_ipad.providers.legacy_855.tools import ToolMixin
 from wechat_ipad.providers.legacy_855.user import UserMixin
+from wechat_ipad.providers.legacy_855.base import WechatAPIClientBase
 
 
 class Legacy855WechatClient(
@@ -17,6 +19,7 @@ class Legacy855WechatClient(
     ChatroomMixin,
     UserMixin,
     ToolMixin,
+    Legacy855RuntimeMixin,
     WechatProviderBase,
 ):
     """855/859 风格 server 的独立 Provider。
@@ -30,6 +33,19 @@ class Legacy855WechatClient(
     provider_name = "legacy_855"
     server_type = "legacy_855"
 
+    def __init__(self, ip: str, port: int, **kwargs):
+        """初始化 855 provider。
+
+        说明：
+        1. 旧 `wechat_ipad/client` 的多继承结构没有显式构造入口，迁移后这里补一个稳定初始化点；
+        2. 基础连接信息仍写入 `WechatAPIClientBase`，消息发送队列继续沿用 `MessageMixin` 的实现；
+        3. 运行时状态由 `Legacy855RuntimeMixin` 单独初始化，便于后续 864 provider 走自己的模型。
+        """
+        del kwargs
+        WechatAPIClientBase.__init__(self, ip, port)
+        MessageMixin.__init__(self)
+        self._init_runtime_state()
+
     async def send_at_message(self, wxid: str, content: str, at: list[str]) -> tuple[int, int, int]:
         """发送 @ 消息，兼容现有插件调用方式。"""
         if not self.wxid:
@@ -47,4 +63,3 @@ class Legacy855WechatClient(
             output = content
 
         return await self.send_text_message(wxid, output, at)
-
diff --git a/wechat_ipad/providers/legacy_855/runtime.py b/wechat_ipad/providers/legacy_855/runtime.py
new file mode 100644
index 0000000..b01e21b
--- /dev/null
+++ b/wechat_ipad/providers/legacy_855/runtime.py
@@ -0,0 +1,386 @@
+import asyncio
+import time
+from typing import Any, Awaitable, Callable
+
+import toml
+
+
+AsyncCallback = Callable[..., Awaitable[None]]
+
+
+class Legacy855RuntimeMixin:
+    """855/859 风格 server 的运行时编排实现。
+
+    设计说明：
+    1. 855 的差异不只是接口路径，而是“客户端自己负责保活和拉消息”的运行模型；
+    2. 这里把登录、心跳、历史消息消化、实时轮询、掉线恢复集中收口到 provider 内部；
+    3. `Robot` 只再关心“登录成功后做什么”“收到消息后怎么处理”，避免后续接 864 时继续改主链路。
+    """
+
+    def _init_runtime_state(self) -> None:
+        """初始化运行时状态字段。
+
+        这里不用 `__init__` 参与多继承链，而是由 provider 显式调用：
+        1. 现有 mixin 组合里已经有消息队列初始化逻辑；
+        2. 显式初始化更容易看清哪些状态只属于 855 runtime；
+        3. 也能避免后续再因为 MRO 调用顺序引入隐蔽问题。
+        """
+        self._runtime_running = False
+        self._runtime_recovery_lock = asyncio.Lock()
+
+    def stop_runtime(self) -> None:
+        """请求停止当前 provider 的运行时主循环。"""
+        self._runtime_running = False
+
+    def is_runtime_running(self) -> bool:
+        """返回当前 provider 运行时是否处于运行态。"""
+        return bool(getattr(self, "_runtime_running", False))
+
+    async def run_runtime(
+        self,
+        *,
+        ipad_config: dict,
+        config_path: str,
+        logger,
+        on_login_ready: AsyncCallback,
+        on_history_message: AsyncCallback,
+        on_message: AsyncCallback,
+        on_idle_payload: AsyncCallback | None = None,
+        on_logout: AsyncCallback | None = None,
+        on_runtime_state_change: AsyncCallback | None = None,
+    ) -> None:
+        """启动 855 provider 的完整运行时。
+
+        参数说明：
+        1. `ipad_config` 与 `config_path` 由上层传入，provider 只负责更新和落盘登录态；
+        2. `on_*` 回调保持尽量少，只暴露业务层真正需要接手的几个时机；
+        3. 这样既避免 `Robot` 再写协议细节，也不额外引入复杂的事件总线或状态机层。
+        """
+        wxid = str(ipad_config.get("wxid", "") or "").strip()
+        device_name = str(ipad_config.get("device_name", "") or "").strip()
+        device_id = str(ipad_config.get("device_id", "") or "").strip()
+
+        if not device_name:
+            device_name = self.create_device_name()
+        if not device_id:
+            device_id = self.create_device_id()
+
+        await self._ensure_login(
+            wxid=wxid,
+            device_name=device_name,
+            device_id=device_id,
+            ipad_config=ipad_config,
+            config_path=config_path,
+            logger=logger,
+        )
+
+        # 登录后的项目初始化若失败，应直接中断启动：
+        # 1. 这里会初始化联系人缓存、插件注入、消息存储等关键依赖；
+        # 2. 如果仅记录异常继续运行，后续消息循环只会在半初始化状态下引发更多连锁问题；
+        # 3. 因此这里刻意不吞异常，让启动期问题尽早暴露。
+        await on_login_ready(self.get_login_identity(device_name=device_name, device_id=device_id))
+        logger.info(f"wechat_ipad登录设备信息: device_name: {device_name}  device_id: {device_id}")
+        logger.info("wechat_ipad登录成功")
+
+        logger.info("处理堆积消息中")
+        await self._drain_startup_history(on_history_message=on_history_message, logger=logger)
+        logger.info("处理堆积消息完毕")
+
+        await self._set_runtime_running(True, on_runtime_state_change=on_runtime_state_change, logger=logger)
+        heartbeat_task = asyncio.create_task(
+            self._heartbeat_loop(
+                heartbeat_func=self.heartbeat,
+                interval_seconds=60,
+                logger=logger,
+                loop_name="wechat_ipad心跳",
+                on_logout=on_logout,
+                on_runtime_state_change=on_runtime_state_change,
+            )
+        )
+        heartbeat_long_task = asyncio.create_task(
+            self._heartbeat_loop(
+                heartbeat_func=self.heartbeat_long,
+                interval_seconds=120,
+                logger=logger,
+                loop_name="wechat_ipad长连接心跳",
+                on_logout=on_logout,
+                on_runtime_state_change=on_runtime_state_change,
+            )
+        )
+
+        try:
+            logger.info("开始处理wechat_ipad消息")
+            while self.is_runtime_running():
+                try:
+                    data_temp = await self.sync_message()
+                except Exception as e:
+                    logger.error(f"获取新消息失败 {e}")
+                    recovered = await self._try_recover_from_logout(
+                        reason=e,
+                        logger=logger,
+                        on_logout=on_logout,
+                        on_runtime_state_change=on_runtime_state_change,
+                    )
+                    if not recovered:
+                        if not self.is_runtime_running():
+                            break
+                        await asyncio.sleep(5)
+                    continue
+
+                data = data_temp.get("AddMsgs")
+                if data:
+                    for message in data:
+                        await self._safe_callback(
+                            on_message,
+                            message,
+                            logger=logger,
+                            callback_name="on_message",
+                        )
+                else:
+                    # 对于 855 而言，`Ret=0 + KeyBuf` 只是正常空轮询返回，不需要额外刷屏日志。
+                    if on_idle_payload:
+                        await self._safe_callback(
+                            on_idle_payload,
+                            data_temp,
+                            logger=logger,
+                            callback_name="on_idle_payload",
+                        )
+
+                await asyncio.sleep(2)
+        finally:
+            heartbeat_task.cancel()
+            heartbeat_long_task.cancel()
+            await asyncio.gather(heartbeat_task, heartbeat_long_task, return_exceptions=True)
+            await self._set_runtime_running(False, on_runtime_state_change=on_runtime_state_change, logger=logger)
+
+    async def _ensure_login(
+        self,
+        *,
+        wxid: str,
+        device_name: str,
+        device_id: str,
+        ipad_config: dict,
+        config_path: str,
+        logger,
+    ) -> None:
+        """保证当前 provider 已完成登录，并把登录结果写回配置。
+
+        这里沿用现有 855 的行为：
+        1. 优先复用缓存唤醒；
+        2. 唤醒失败或无缓存时回退到二维码登录；
+        3. 登录成功后继续把 wxid / device 信息写回 `config.toml`，保持现有部署习惯不变。
+        """
+        if await self.is_logged_in(wxid):
+            self.wxid = wxid
+            profile = await self.get_profile()
+            self.nickname = profile.get("NickName", {}).get("string", "")
+            self.alias = profile.get("Alias", "")
+            self.phone = profile.get("BindMobile", {}).get("string", "")
+            self.signature = profile.get("Signature", "")
+            logger.info(
+                f"wechat_ipad登录账号信息: wxid: {self.wxid}  昵称: {self.nickname}  微信号: {self.alias}  手机号: {self.phone}"
+            )
+            return
+
+        while not await self.is_logged_in(wxid):
+            uuid = ""
+            url = ""
+            try:
+                if await self.get_cached_info(wxid):
+                    uuid = await self.awaken_login(wxid)
+                    logger.info(f"获取到登录uuid: {uuid}")
+                else:
+                    uuid, url = await self.get_qr_code(device_id=device_id, device_name=device_name, print_qr=True)
+                    logger.info(f"获取到登录uuid: {uuid}")
+                    logger.info(f"获取到登录二维码: {url}")
+            except Exception as e:
+                logger.error(f"登录过程出错: {e}")
+                uuid, url = await self.get_qr_code(device_id=device_id, device_name=device_name, print_qr=True)
+                logger.info(f"获取到登录uuid: {uuid}")
+                logger.info(f"获取到登录二维码: {url}")
+
+            while True:
+                logger.info(f"uuid: {uuid}, url: {url}")
+                stat, data = await self.check_login_uuid(uuid, device_id=device_id)
+                if stat:
+                    break
+                logger.info(f"等待登录中，过期倒计时：{data}")
+                await asyncio.sleep(5)
+
+            self._apply_login_result(data=data, logger=logger)
+            ipad_config["wxid"] = self.wxid
+            ipad_config["device_name"] = device_name
+            ipad_config["device_id"] = device_id
+            ipad_config["login_time"] = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
+            with open(config_path, "w", encoding="utf-8") as f:
+                toml.dump(ipad_config, f)
+            break
+
+    def _apply_login_result(self, *, data: dict, logger) -> None:
+        """把登录接口返回的用户信息统一写回当前 provider。"""
+        acct_section = data.get("acctSectResp", {}) or {}
+        self.wxid = acct_section.get("userName", "")
+        self.nickname = acct_section.get("nickName", "")
+        self.alias = acct_section.get("alias", "")
+        self.phone = acct_section.get("bindMobile", "")
+        self.signature = data.get("Signature", "")
+        logger.info(
+            f"wechat_ipad登录账号信息: wxid: {self.wxid}  昵称: {self.nickname}  微信号: {self.alias}  手机号: {self.phone}"
+        )
+
+    async def _drain_startup_history(self, *, on_history_message: AsyncCallback, logger) -> None:
+        """在实时主循环前先消化堆积消息。
+
+        这里保持旧逻辑的退出条件：
+        1. 连续多次轮询不到 `AddMsgs` 才认为历史堆积已经处理完；
+        2. 每批历史消息仍交给上层回调决定如何归档；
+        3. provider 只负责拉取与调度，不把历史消息也混入实时业务处理。
+        """
+        empty_rounds = 0
+        while True:
+            data = await self.sync_message()
+            add_msgs = data.get("AddMsgs")
+            if not add_msgs:
+                if empty_rounds > 2:
+                    break
+                empty_rounds += 1
+                continue
+
+            logger.debug(f"接受到 {len(add_msgs)} 条历史消息，开始仅落库归档")
+            for raw_message in add_msgs:
+                await self._safe_callback(
+                    on_history_message,
+                    raw_message,
+                    logger=logger,
+                    callback_name="on_history_message",
+                )
+            await asyncio.sleep(1)
+
+    async def _heartbeat_loop(
+        self,
+        *,
+        heartbeat_func: Callable[[], Awaitable[bool]],
+        interval_seconds: int,
+        logger,
+        loop_name: str,
+        on_logout: AsyncCallback | None,
+        on_runtime_state_change: AsyncCallback | None,
+    ) -> None:
+        """统一承接心跳与长心跳循环，减少 855 provider 内部重复代码。"""
+        logger.info(f"开启{loop_name}！")
+        while self.is_runtime_running():
+            try:
+                success = await heartbeat_func()
+                if success:
+                    logger.debug(f"{loop_name}进行中")
+                else:
+                    logger.warning(f"{loop_name}失败")
+            except Exception as e:
+                logger.error(f"{loop_name}: {e}")
+                recovered = await self._try_recover_from_logout(
+                    reason=e,
+                    logger=logger,
+                    on_logout=on_logout,
+                    on_runtime_state_change=on_runtime_state_change,
+                )
+                if not recovered and not self.is_runtime_running():
+                    break
+            await asyncio.sleep(interval_seconds)
+
+    async def _try_recover_from_logout(
+        self,
+        *,
+        reason: Exception | str,
+        logger,
+        on_logout: AsyncCallback | None,
+        on_runtime_state_change: AsyncCallback | None,
+    ) -> bool:
+        """处理 855 provider 的掉线恢复逻辑。
+
+        关键点：
+        1. 855 的掉线恢复是 provider 运行模型的一部分，因此也应该收口在 provider 内部；
+        2. 这里用锁把恢复流程串行化，避免心跳线程与消息轮询线程同时触发二次登录；
+        3. 上层只接收一个“检测到掉线”的通知，用于发告警或记录运维日志。
+        """
+        if not self._is_logout_reason(reason):
+            return False
+
+        async with self._runtime_recovery_lock:
+            # 进入锁后再判断一次，避免并发恢复时第二个协程重复执行二次登录。
+            if not self.is_runtime_running():
+                return False
+
+            await self._safe_callback(
+                on_logout,
+                str(reason),
+                logger=logger,
+                callback_name="on_logout",
+            )
+
+            try:
+                logger.info("定时进行二次登录动作")
+                resp = await self.twice_auto_auth()
+                if resp:
+                    logger.info("定时二次登录成功！")
+                    return True
+                logger.error("定时二次登录失败！")
+            except Exception as e:
+                logger.error(f"login_twice_auto_auth error: {e}")
+
+            await self._set_runtime_running(False, on_runtime_state_change=on_runtime_state_change, logger=logger)
+            return False
+
+    async def _set_runtime_running(
+        self,
+        running: bool,
+        *,
+        on_runtime_state_change: AsyncCallback | None,
+        logger,
+    ) -> None:
+        """同步 provider 运行态，并通知上层镜像状态。"""
+        self._runtime_running = running
+        if on_runtime_state_change:
+            await self._safe_callback(
+                on_runtime_state_change,
+                running,
+                logger=logger,
+                callback_name="on_runtime_state_change",
+            )
+
+    async def _safe_callback(
+        self,
+        callback: AsyncCallback | None,
+        *args: Any,
+        logger,
+        callback_name: str,
+    ) -> None:
+        """统一保护上层回调，避免单个业务异常直接打断 provider 主循环。"""
+        if callback is None:
+            return
+        try:
+            await callback(*args)
+        except Exception as e:
+            logger.exception(f"执行回调失败: {callback_name}, error: {e}")
+
+    @staticmethod
+    def _is_logout_reason(reason: Exception | str) -> bool:
+        """判断当前异常是否属于 855 provider 约定的掉线场景。"""
+        return "用户可能退出" in str(reason)
+
+    def get_login_identity(self, *, device_name: str = "", device_id: str = "") -> dict[str, Any]:
+        """返回当前登录身份的轻量归一化结构。
+
+        第一阶段先继续使用 dict：
+        1. 便于 `Robot` 直接消费，不额外引入 dataclass；
+        2. 后续如果 864 也需要对齐结构，可以在 provider 内继续增量补字段；
+        3. 这里同时把 device 信息带上，方便上层统一打印和展示。
+        """
+        return {
+            "wxid": self.wxid,
+            "nickname": self.nickname,
+            "alias": self.alias,
+            "phone": self.phone,
+            "signature": getattr(self, "signature", ""),
+            "device_name": device_name,
+            "device_id": device_id,
+        }