From c742a30e1b85faac6141a5852c11365017d367be Mon Sep 17 00:00:00 2001
From: root <root@minecraft-server>
Date: Tue, 14 Apr 2026 11:49:39 +0800
Subject: [PATCH] =?UTF-8?q?refactor:=20=E7=BB=9F=E4=B8=80=20Packet=20?=
 =?UTF-8?q?=E9=80=9A=E4=BF=A1=E5=8D=8F=E8=AE=AE=20+=20=E5=90=8E=E7=AB=AF?=
 =?UTF-8?q?=E9=85=8D=E7=BD=AE=E7=AE=A1=E7=90=86=20+=20UI=20=E6=B8=85?=
 =?UTF-8?q?=E7=90=86?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- 合并 server.py 到 core/__init__.py，使用统一 Packet 协议
- 后端管理配置持久化 (~/.trulymem/config.json)
- 前端移除 ConfigService，通过 BackendClient 与后端通信
- 删除 UI 中冗余的 AI 推理逻辑 (chat_service, tool_service, message_handler)
- 删除 core/tools 重复文件 (tool_executor, tool_limiter)
- 提示词管理器支持用户自定义 (~/.trulyemem/system_prompt.md)
- 启动入口优化配置路径逻辑
- 更新测试覆盖 (42 tests)
- 更新文档
---
 core/__init__.py                   | 250 +-----------
 core/client.py                     | 100 ++---
 core/graph_client.py               |  10 +-
 core/prompts/prompt_manager.py     |  17 +
 core/server.py                     | 588 ++++++++++++++---------------
 core/tools/__init__.py             |   4 +-
 core/tools/tool_executor.py        | 307 ---------------
 core/tools/tool_limiter.py         | 164 --------
 docs/api.md                        | 152 ++++----
 docs/一键启动指南.md               |  42 ++-
 docs/架构.md                       | 206 ++++------
 tests/test_core/test_packet.py     | 488 ++++++++++++------------
 tests/test_integration/__init__.py | 233 ++++--------
 tests/test_ui/__init__.py          | 275 +++++---------
 trulymem_entry.py                  |  46 ++-
 ui/app.py                          |  75 ++--
 ui/handlers/message_handler.py     |  98 -----
 ui/services/chat_service.py        | 226 -----------
 ui/services/tool_service.py        |  88 -----
 19 files changed, 1020 insertions(+), 2349 deletions(-)
 delete mode 100644 core/tools/tool_executor.py
 delete mode 100644 core/tools/tool_limiter.py
 delete mode 100644 ui/handlers/message_handler.py
 delete mode 100644 ui/services/chat_service.py
 delete mode 100644 ui/services/tool_service.py

diff --git a/core/__init__.py b/core/__init__.py
index 9f6dee2..13ee61b 100644
--- a/core/__init__.py
+++ b/core/__init__.py
@@ -1,242 +1,12 @@
-import threading
-import queue
-import time
-from typing import Any, Dict
-from dataclasses import dataclass, field
-from enum import Enum
-
-
-class PacketType(Enum):
-    MESSAGE = "message"
-    CONFIG = "config"
-    TOOL = "tool"
-    STATUS = "status"
-    HISTORY = "history"
-
-
-@dataclass
-class Packet:
-    id: str
-    type: PacketType
-    body: Dict[str, Any]
-    created_at: float = field(default_factory=time.time)
-
-
+from .server import BackendServer, Packet, PacketType, PacketResponse
+from .client import BackendClient
 from .embedded_db import EmbeddedGraphDB
 
-
-class BackendServer:
-    def __init__(self, db_path: str = "graph_memory.db", use_embedded_db: bool = True):
-        self._db_path = db_path
-        self._use_embedded_db = use_embedded_db
-        self._graph = None
-        self._client = None
-        self._running = False
-        self._thread = None
-        self._input_queue: queue.Queue[Packet] = queue.Queue()
-        self._response_queues: Dict[str, queue.Queue] = {}
-        self._lock = threading.Lock()
-        self._config = {"api_key": "", "base_url": "https://api.deepseek.com"}
-
-    def start(self, api_key: str = "", base_url: str = "https://api.deepseek.com") -> None:
-        if self._running:
-            return
-        self._init_graph()
-        self._config = {"api_key": api_key, "base_url": base_url}
-        if api_key:
-            from .graph_client import GraphMemoryClient
-            self._client = GraphMemoryClient(api_key=api_key, base_url=base_url, graph=self._graph)
-        self._running = True
-        self._thread = threading.Thread(target=self._run_loop, daemon=True)
-        self._thread.start()
-
-    def _init_graph(self) -> None:
-        if self._use_embedded_db:
-            self._graph = EmbeddedGraphDB(db_path=self._db_path)
-        else:
-            from .graph_client import Neo4jGraph
-            self._graph = Neo4jGraph(uri="bolt://localhost:7687", user="neo4j", password="graphmemory123")
-
-    def _run_loop(self) -> None:
-        while self._running:
-            try:
-                packet = self._input_queue.get(timeout=0.1)
-            except queue.Empty:
-                continue
-            self._process_packet(packet)
-
-    def _process_packet(self, packet: Packet) -> None:
-        body = {"success": False, "error": "not implemented"}
-        try:
-            if packet.type == PacketType.MESSAGE:
-                body = self._handle_message(packet.body)
-            elif packet.type == PacketType.CONFIG:
-                body = self._handle_config(packet.body)
-            elif packet.type == PacketType.TOOL:
-                body = self._handle_tool(packet.body)
-            elif packet.type == PacketType.STATUS:
-                body = self._handle_status()
-            elif packet.type == PacketType.HISTORY:
-                body = self._handle_history(packet.body)
-            body["success"] = True
-        except Exception as e:
-            body["error"] = str(e)
-        finally:
-            self._send_response(packet.id, Packet(id=packet.id, type=packet.type, body=body))
-
-    def _handle_message(self, body: Dict) -> Dict:
-        from .tool_executor import execute_tool
-        from .tool_limiter import ToolLimiter
-        
-        limiter = ToolLimiter()
-        user_input = body.get("message", "")
-        if not self._client:
-            return {"error": "API Key not configured", "content": "请先配置 API Key"}
-        
-        messages = [{"role": "user", "content": user_input}]
-        response = self._client.send_message_with_history(messages)
-        message = response.choices[0].message
-        content = message.content or "(无回复)"
-        tool_calls = []
-        
-        while message.tool_calls:
-            # 处理所有工具调用
-            tool_results = []
-            
-            for tool_call in message.tool_calls:
-                args = {}
-                try:
-                    import json
-                    args = json.loads(tool_call.function.arguments)
-                except:
-                    pass
-                
-                allowed, reason = limiter.can_call(tool_call.function.name, args)
-                if not allowed:
-                    tool_calls.append({"name": tool_call.function.name, "result": f"工具调用被拒绝: {reason}"})
-                    tool_results.append({"role": "tool", "tool_call_id": tool_call.id, "content": f"工具调用被拒绝: {reason}"})
-                    continue
-                
-                limiter.record_call(tool_call.function.name, args)
-                result = execute_tool(self._graph, tool_call.function.name, args)
-                tool_calls.append({"name": tool_call.function.name, "result": result})
-                tool_results.append({"role": "tool", "tool_call_id": tool_call.id, "content": result})
-            
-            # 添加 assistant 消息（包含完整的 tool_calls，必须有 type 字段）
-            assistant_msg = {
-                "role": "assistant",
-                "content": message.content or "",
-                "tool_calls": [{
-                    "id": tc.id,
-                    "type": "function",
-                    "function": {
-                        "name": tc.function.name,
-                        "arguments": tc.function.arguments
-                    }
-                } for tc in message.tool_calls]
-            }
-            messages.append(assistant_msg)
-            
-            # 添加工具结果
-            messages.extend(tool_results)
-            
-            response = self._client.send_message_with_history(messages)
-            message = response.choices[0].message
-            content = message.content or content
-        
-        return {"content": content, "tool_calls": tool_calls}
-
-    def _handle_config(self, body: Dict) -> Dict:
-        api_key = body.get("api_key", "")
-        base_url = body.get("base_url", "https://api.deepseek.com")
-        self._config = {"api_key": api_key, "base_url": base_url}
-        if api_key and self._graph:
-            from .graph_client import GraphMemoryClient
-            self._client = GraphMemoryClient(api_key=api_key, base_url=base_url, graph=self._graph)
-        return {"status": "config_updated"}
-
-    def _handle_tool(self, body: Dict) -> Dict:
-        from .tool_executor import execute_tool
-        name = body.get("name", "")
-        args = body.get("arguments", {})
-        result = execute_tool(self._graph, name, args)
-        return {"result": result}
-
-    def _handle_status(self) -> Dict:
-        return {"running": self._running, "config": self._config, "client_ready": self._client is not None}
-
-    def _handle_history(self, body: Dict) -> Dict:
-        action = body.get("action", "get")
-        if action == "save":
-            self._message_history = body.get("messages", [])
-            return {"status": "saved"}
-        return {"history": getattr(self, "_message_history", [])}
-
-    def send(self, packet: Packet) -> Packet:
-        resp_q = queue.Queue()
-        with self._lock:
-            self._response_queues[packet.id] = resp_q
-        self._input_queue.put(packet)
-        try:
-            return resp_q.get(timeout=30.0)
-        except queue.Empty:
-            return Packet(id=packet.id, type=packet.type, body={"success": False, "error": "timeout"})
-        finally:
-            with self._lock:
-                self._response_queues.pop(packet.id, None)
-
-    def _send_response(self, request_id: str, packet: Packet) -> None:
-        with self._lock:
-            q = self._response_queues.pop(request_id, None)
-        if q:
-            q.put(packet)
-
-    def shutdown(self) -> None:
-        self._running = False
-        if self._thread:
-            self._thread.join(timeout=2.0)
-        if self._graph:
-            self._graph.close()
-            self._graph = None
-
-
-class BackendClient:
-    def __init__(self, server: BackendServer):
-        self._server = server
-        self._counter = 0
-        self._lock = threading.Lock()
-
-    def _next_id(self) -> str:
-        with self._lock:
-            self._counter += 1
-            return f"{time.time()}_{self._counter}"
-
-    def send_message(self, message: str) -> Dict:
-        packet = Packet(id=self._next_id(), type=PacketType.MESSAGE, body={"message": message})
-        return self._server.send(packet).body
-
-    def update_config(self, api_key: str, base_url: str = "https://api.deepseek.com") -> Dict:
-        packet = Packet(id=self._next_id(), type=PacketType.CONFIG, body={"api_key": api_key, "base_url": base_url})
-        return self._server.send(packet).body
-
-    def execute_tool(self, name: str, arguments: Dict) -> str:
-        packet = Packet(id=self._next_id(), type=PacketType.TOOL, body={"name": name, "arguments": arguments})
-        return self._server.send(packet).body.get("result", "")
-
-    def get_status(self) -> Dict:
-        packet = Packet(id=self._next_id(), type=PacketType.STATUS, body={})
-        return self._server.send(packet).body
-
-    def save_history(self, messages: list) -> None:
-        packet = Packet(id=self._next_id(), type=PacketType.HISTORY, body={"action": "save", "messages": messages})
-        self._server.send(packet)
-
-    def get_history(self) -> list:
-        packet = Packet(id=self._next_id(), type=PacketType.HISTORY, body={"action": "get"})
-        return self._server.send(packet).body.get("history", [])
-
-    def shutdown(self) -> None:
-        self._server.shutdown()
-
-
-__all__ = ["BackendServer", "BackendClient", "EmbeddedGraphDB", "Packet", "PacketType"]
\ No newline at end of file
+__all__ = [
+    "BackendServer",
+    "BackendClient",
+    "EmbeddedGraphDB",
+    "Packet",
+    "PacketType",
+    "PacketResponse"
+]
\ No newline at end of file
diff --git a/core/client.py b/core/client.py
index c94d002..592dc8a 100644
--- a/core/client.py
+++ b/core/client.py
@@ -1,61 +1,75 @@
 import threading
+import time
 from typing import Any, Dict
 
-from .server import BackendServer, MessageType
+from .server import BackendServer, Packet, PacketType
 
 
 class BackendClient:
+    
     def __init__(self, server: BackendServer):
         self._server = server
-        self._request_counter = 0
+        self._counter = 0
         self._lock = threading.Lock()
 
-    def process_message(self, user_input: str, timeout: float = 30.0) -> Dict[str, Any]:
+    def _next_id(self) -> str:
         with self._lock:
-            self._request_counter += 1
-        return self._server.process_message(user_input, timeout)
+            self._counter += 1
+            return f"{time.time()}_{self._counter}"
 
-    def execute_tool(self, tool_name: str, arguments: Dict[str, Any], timeout: float = 10.0) -> str:
-        with self._lock:
-            self._request_counter += 1
-        return self._server.execute_tool(tool_name, arguments, timeout)
+    def send(self, message: str) -> Dict:
+        return self.process_message(message)
 
-    def update_config(self, api_key: str, base_url: str = "https://api.deepseek.com") -> Dict[str, Any]:
-        return self._send_request(MessageType.SET_CONFIG, {"api_key": api_key, "base_url": base_url})
+    def process_message(self, user_input: str) -> Dict:
+        return self._server.process_message(user_input)
 
-    def get_config(self) -> Dict[str, str]:
-        result = self._send_request(MessageType.GET_CONFIG, {})
-        return result.get("data", {"api_key": "", "base_url": "https://api.deepseek.com"})
-
-    def get_message_history(self) -> list:
-        result = self._send_request(MessageType.GET_HISTORY, {})
-        return result.get("data", {}).get("history", [])
-
-    def save_message_history(self, messages: list) -> None:
-        self._send_request(MessageType.SAVE_HISTORY, {"messages": messages})
-
-    def _send_request(self, message_type: MessageType, payload: Dict[str, Any]) -> Dict[str, Any]:
-        import queue
-        request_id = f"{id(self)}"
-        response_queue = queue.Queue()
-        
-        from .server import BackendRequest
-        request = BackendRequest(
-            request_id=request_id,
-            message_type=message_type,
-            payload=payload,
-            response_queue=response_queue
+    def update_config(self, api_key: str, base_url: str = "https://api.deepseek.com", model: str = "deepseek-chat") -> Dict:
+        packet = Packet(
+            id=self._next_id(),
+            type=PacketType.SET_CONFIG,
+            body={"api_key": api_key, "base_url": base_url, "model": model}
         )
-        
-        self._server._request_queue.put(request)
-        
-        try:
-            response = response_queue.get(timeout=5.0)
-            if not response.success:
-                raise Exception(response.error)
-            return {"success": True, "data": response.data}
-        except queue.Empty:
-            return {"success": False, "error": "timeout"}
+        return self._server.send(packet).body
+
+    def execute_tool(self, name: str, arguments: Dict) -> Dict:
+        packet = Packet(
+            id=self._next_id(),
+            type=PacketType.EXECUTE_TOOL,
+            body={"tool_name": name, "arguments": arguments}
+        )
+        return self._server.send(packet).body
+
+    def get_status(self) -> Dict:
+        packet = Packet(
+            id=self._next_id(),
+            type=PacketType.GET_STATUS,
+            body={}
+        )
+        return self._server.send(packet).body
+
+    def get_config(self) -> Dict:
+        packet = Packet(
+            id=self._next_id(),
+            type=PacketType.GET_CONFIG,
+            body={}
+        )
+        return self._server.send(packet).body
+
+    def save_history(self, messages: list) -> None:
+        packet = Packet(
+            id=self._next_id(),
+            type=PacketType.SAVE_HISTORY,
+            body={"messages": messages}
+        )
+        self._server.send(packet)
+
+    def get_history(self) -> list:
+        packet = Packet(
+            id=self._next_id(),
+            type=PacketType.GET_HISTORY,
+            body={}
+        )
+        return self._server.send(packet).body.get("history", [])
 
     def shutdown(self) -> None:
         self._server.shutdown()
\ No newline at end of file
diff --git a/core/graph_client.py b/core/graph_client.py
index 76c5c1b..706ff75 100644
--- a/core/graph_client.py
+++ b/core/graph_client.py
@@ -303,12 +303,12 @@ class Neo4jGraph:
 class GraphMemoryClient:
     """图记忆客户端"""
     
-    def __init__(self, api_key: str, base_url: str, graph):
+    def __init__(self, api_key: str, base_url: str, graph, model: str = "deepseek-chat"):
         self.client = OpenAI(api_key=api_key, base_url=base_url)
         self.graph = graph
         self.tools = TOOLS
+        self.model = model
         
-        # 使用新的提示词管理器
         prompt_manager = PromptManager()
         self.system_prompt = prompt_manager.get_system_prompt()
     
@@ -330,7 +330,7 @@ class GraphMemoryClient:
             messages.extend(tool_results)
         
         response = self.client.chat.completions.create(
-            model=MODEL_NAME,
+            model=self.model,
             messages=messages,
             tools=self.tools,
             tool_choice="auto"
@@ -347,7 +347,7 @@ class GraphMemoryClient:
         messages.extend(messages_history)
         
         response = self.client.chat.completions.create(
-            model=MODEL_NAME,
+            model=self.model,
             messages=messages,
             tools=self.tools,
             tool_choice="auto"
@@ -373,7 +373,7 @@ class GraphMemoryClient:
             messages.extend(tool_results)
 
         stream = self.client.chat.completions.create(
-            model=MODEL_NAME,
+            model=self.model,
             messages=messages,
             tools=self.tools,
             tool_choice="auto",
diff --git a/core/prompts/prompt_manager.py b/core/prompts/prompt_manager.py
index fb19377..fd30db2 100644
--- a/core/prompts/prompt_manager.py
+++ b/core/prompts/prompt_manager.py
@@ -10,6 +10,9 @@ class PromptManager:
     _instance = None
     _cached_prompt = None
     
+    # 用户自定义提示词路径
+    USER_PROMPT_PATH = Path.home() / ".trulymem" / "system_prompt.md"
+    
     def __new__(cls):
         """单例模式，避免重复加载"""
         if cls._instance is None:
@@ -26,11 +29,19 @@ class PromptManager:
         if PromptManager._cached_prompt is not None:
             return PromptManager._cached_prompt
         
+        # 1. 优先使用用户自定义提示词
+        if self.USER_PROMPT_PATH.exists():
+            with open(self.USER_PROMPT_PATH, "r", encoding="utf-8") as f:
+                PromptManager._cached_prompt = f.read()
+            return PromptManager._cached_prompt
+        
+        # 2. 使用打包的提示词
         prompt_file = self.prompts_dir / "system_prompt.md"
         if prompt_file.exists():
             with open(prompt_file, "r", encoding="utf-8") as f:
                 PromptManager._cached_prompt = f.read()
         else:
+            # 3. 使用内置默认提示词
             PromptManager._cached_prompt = self._build_default_prompt()
         
         return PromptManager._cached_prompt
@@ -78,3 +89,9 @@ class PromptManager:
 - 如何使用工具
 
 记住：灵活应对，保持自然对话体验。"""
+
+    @staticmethod
+    def clear_cache():
+        """清除缓存，强制重新加载提示词"""
+        PromptManager._cached_prompt = None
+        PromptManager._instance = None
\ No newline at end of file
diff --git a/core/server.py b/core/server.py
index 5bd3d69..375746c 100644
--- a/core/server.py
+++ b/core/server.py
@@ -2,17 +2,16 @@ import threading
 import queue
 import time
 import json
+import os
+from pathlib import Path
 from typing import Any, Dict, Optional
 from dataclasses import dataclass, field
 from enum import Enum
 
 from .embedded_db import EmbeddedGraphDB
-from .graph_client import GraphMemoryClient
-from .tool_executor import execute_tool
-from .tool_limiter import ToolLimiter
 
 
-class MessageType(Enum):
+class PacketType(Enum):
     PROCESS_MESSAGE = "process_message"
     EXECUTE_TOOL = "execute_tool"
     GET_STATUS = "get_status"
@@ -24,46 +23,66 @@ class MessageType(Enum):
 
 
 @dataclass
-class BackendRequest:
-    request_id: str
-    message_type: MessageType
-    payload: Dict[str, Any]
-    response_queue: queue.Queue = field(default=None)
+class Packet:
+    id: str
+    type: PacketType
+    body: Dict[str, Any]
+    response_queue: Optional[queue.Queue] = field(default=None)
+    created_at: float = field(default_factory=time.time)
 
 
 @dataclass
-class BackendResponse:
-    request_id: str
+class PacketResponse:
+    id: str
     success: bool
     data: Any = None
     error: Optional[str] = None
 
 
 class BackendServer:
-    def __init__(self, db_path: str = "graph_memory.db", use_embedded_db: bool = True):
+    
+    DEFAULT_CONFIG_PATH = Path.home() / ".trulymem" / "config.json"
+    
+    def __init__(self, db_path: str = "graph_memory.db", use_embedded_db: bool = True, config_file: str = None):
         self._db_path = db_path
         self._use_embedded_db = use_embedded_db
+        self._config_file = Path(config_file) if config_file else self.DEFAULT_CONFIG_PATH
         
         self._graph = None
         self._client = None
-        self._tool_limiter = ToolLimiter()
+        self._tool_limiter = None
         
-        self._request_queue: queue.Queue[BackendRequest] = queue.Queue()
+        self._input_queue: queue.Queue[Packet] = queue.Queue()
+        self._response_queues: Dict[str, queue.Queue] = {}
         self._running = False
         self._thread: Optional[threading.Thread] = None
         
         self._lock = threading.Lock()
+        self._config = {"api_key": "", "base_url": "https://api.deepseek.com", "model": "deepseek-chat"}
+        self._message_history: list = []
 
-    def start(self, api_key: str = "", base_url: str = "https://api.deepseek.com") -> None:
+    def start(self, api_key: str = "", base_url: str = "https://api.deepseek.com", model: str = "deepseek-chat") -> None:
         if self._running:
             return
         
-        self._init_graph()
+        self._load_config()
         
         if api_key:
+            self._config["api_key"] = api_key
+        if base_url:
+            self._config["base_url"] = base_url
+        if model:
+            self._config["model"] = model
+        
+        self._init_graph()
+        self._tool_limiter = self._create_tool_limiter()
+        
+        if self._config["api_key"]:
+            from .graph_client import GraphMemoryClient
             self._client = GraphMemoryClient(
-                api_key=api_key,
-                base_url=base_url,
+                api_key=self._config["api_key"],
+                base_url=self._config["base_url"],
+                model=self._config.get("model", "deepseek-chat"),
                 graph=self._graph
             )
         
@@ -71,6 +90,24 @@ class BackendServer:
         self._thread = threading.Thread(target=self._run_loop, daemon=True)
         self._thread.start()
 
+    def _load_config(self) -> None:
+        if self._config_file.exists():
+            try:
+                with open(self._config_file, 'r') as f:
+                    saved = json.load(f)
+                    self._config.update(saved)
+            except Exception:
+                pass
+
+    def _save_config(self) -> None:
+        self._config_file.parent.mkdir(parents=True, exist_ok=True)
+        with open(self._config_file, 'w') as f:
+            json.dump(self._config, f, indent=2)
+
+    def _create_tool_limiter(self):
+        from .tool_limiter import ToolLimiter
+        return ToolLimiter()
+
     def _init_graph(self) -> None:
         if self._use_embedded_db:
             self._graph = EmbeddedGraphDB(db_path=self._db_path)
@@ -85,310 +122,276 @@ class BackendServer:
     def _run_loop(self) -> None:
         while self._running:
             try:
-                request = self._request_queue.get(timeout=0.1)
+                packet = self._input_queue.get(timeout=0.1)
             except queue.Empty:
                 continue
             
-            if request.message_type == MessageType.PROCESS_MESSAGE:
-                self._handle_process_message(request)
-            elif request.message_type == MessageType.EXECUTE_TOOL:
-                self._handle_execute_tool(request)
-            elif request.message_type == MessageType.GET_STATUS:
-                self._handle_get_status(request)
-            elif request.message_type == MessageType.GET_CONFIG:
-                self._handle_get_config(request)
-            elif request.message_type == MessageType.SET_CONFIG:
-                self._handle_set_config(request)
-            elif request.message_type == MessageType.GET_HISTORY:
-                self._handle_get_history(request)
-            elif request.message_type == MessageType.SAVE_HISTORY:
-                self._handle_save_history(request)
-            elif request.message_type == MessageType.SHUTDOWN:
-                self._running = False
-                self._send_response(request, BackendResponse(
-                    request_id=request.request_id,
-                    success=True,
-                    data={"status": "shutdown"}
-                ))
+            self._process_packet(packet)
 
-    def _handle_process_message(self, request: BackendRequest) -> None:
+    def _process_packet(self, packet: Packet) -> None:
+        response_body = {"error": "not implemented"}
+        
         try:
-            user_input = request.payload.get("user_input", "")
+            if packet.type == PacketType.PROCESS_MESSAGE:
+                response_body = self._handle_process_message(packet.body)
+            elif packet.type == PacketType.EXECUTE_TOOL:
+                response_body = self._handle_execute_tool(packet.body)
+            elif packet.type == PacketType.GET_STATUS:
+                response_body = self._handle_get_status()
+            elif packet.type == PacketType.GET_CONFIG:
+                response_body = self._handle_get_config()
+            elif packet.type == PacketType.SET_CONFIG:
+                response_body = self._handle_set_config(packet.body)
+            elif packet.type == PacketType.GET_HISTORY:
+                response_body = self._handle_get_history()
+            elif packet.type == PacketType.SAVE_HISTORY:
+                response_body = self._handle_save_history(packet.body)
+            elif packet.type == PacketType.SHUTDOWN:
+                self._running = False
+                response_body = {"success": True, "status": "shutdown"}
             
-            if not self._client:
-                self._send_response(request, BackendResponse(
-                    request_id=request.request_id,
-                    success=False,
-                    error="API Key 未配置"
-                ))
-                return
+            if "success" not in response_body:
+                response_body["success"] = True
+        except Exception as e:
+            response_body["success"] = False
+            response_body["error"] = str(e)
+        
+        self._send_response(packet.id, PacketResponse(
+            id=packet.id,
+            success=response_body.get("success", False),
+            data=response_body if response_body.get("success") else None,
+            error=response_body.get("error")
+        ))
+
+    def _handle_process_message(self, body: Dict) -> Dict:
+        from .tool_executor import execute_tool
+        
+        user_input = body.get("user_input", "")
+        
+        if not self._client:
+            return {"success": False, "error": "API Key 未配置", "content": "请先配置 API Key"}
+        
+        self._tool_limiter.reset()
+        
+        messages_history = [{"role": "user", "content": user_input}]
+        
+        response = self._client.send_message_with_history(messages_history)
+        message = response.choices[0].message
+        
+        tool_calls = []
+        accumulated_content = ""
+        rejected_tools = []
+        
+        while message.tool_calls:
+            if message.content:
+                accumulated_content += message.content + "\n\n"
             
-            self._tool_limiter.reset()
-            
-            messages_history = [{"role": "user", "content": user_input}]
-            
-            response = self._client.send_message_with_history(messages_history)
-            message = response.choices[0].message
-            
-            tool_calls = []
-            accumulated_content = ""
-            rejected_tools = []
-            
-            while message.tool_calls:
-                if message.content:
-                    accumulated_content += message.content + "\n\n"
-                
-                assistant_msg = {
-                    "role": "assistant",
-                    "content": message.content,
-                    "tool_calls": [
-                        {
-                            "id": tc.id,
-                            "type": "function",
-                            "function": {
-                                "name": tc.function.name,
-                                "arguments": tc.function.arguments
-                            }
-                        } for tc in message.tool_calls
-                    ]
-                }
-                messages_history.append(assistant_msg)
-                
-                current_tool_results = []
-                for tool_call in message.tool_calls:
-                    args = json.loads(tool_call.function.arguments)
-                    
-                    allowed, reason = self._tool_limiter.can_call(tool_call.function.name, args)
-                    
-                    if not allowed:
-                        rejected_tools.append((tool_call.function.name, reason))
-                        result = f"工具调用被拒绝: {reason}"
-                        tool_result_msg = {
-                            "role": "tool",
-                            "tool_call_id": tool_call.id,
-                            "content": result
+            assistant_msg = {
+                "role": "assistant",
+                "content": message.content,
+                "tool_calls": [
+                    {
+                        "id": tc.id,
+                        "type": "function",
+                        "function": {
+                            "name": tc.function.name,
+                            "arguments": tc.function.arguments
                         }
-                        current_tool_results.append(tool_result_msg)
-                        continue
-                    
-                    self._tool_limiter.record_call(tool_call.function.name, args)
-                    
-                    result = execute_tool(self._graph, tool_call.function.name, args)
-                    tool_calls.append({
-                        "name": tool_call.function.name,
-                        "arguments": args,
-                        "result": result
-                    })
-                    
+                    } for tc in message.tool_calls
+                ]
+            }
+            messages_history.append(assistant_msg)
+            
+            current_tool_results = []
+            for tool_call in message.tool_calls:
+                args = json.loads(tool_call.function.arguments)
+                
+                allowed, reason = self._tool_limiter.can_call(tool_call.function.name, args)
+                
+                if not allowed:
+                    rejected_tools.append((tool_call.function.name, reason))
+                    result = f"工具调用被拒绝: {reason}"
                     tool_result_msg = {
                         "role": "tool",
                         "tool_call_id": tool_call.id,
                         "content": result
                     }
                     current_tool_results.append(tool_result_msg)
+                    continue
                 
-                messages_history.extend(current_tool_results)
+                self._tool_limiter.record_call(tool_call.function.name, args)
                 
-                response = self._client.send_message_with_history(messages_history)
-                message = response.choices[0].message
-            
-            final_content = message.content or ""
-            content = accumulated_content + final_content if accumulated_content else final_content
-            
-            if not content:
-                content = "(无回复)"
-            
-            if tool_calls:
-                tool_names = [tc["name"] for tc in tool_calls]
-                content = f"已执行工具: {', '.join(tool_names)}\n\n{content}"
-            
-            if rejected_tools:
-                rejected_info = "\n".join([f"{name}: {reason}" for name, reason in rejected_tools])
-                content += f"\n\n部分工具调用被限制:\n{rejected_info}"
-                content += f"\n\n工具调用统计:\n{self._tool_limiter.get_summary()}"
-            
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=True,
-                data={
-                    "content": content,
-                    "tool_calls": tool_calls,
-                    "rejected_tools": rejected_tools
+                result = execute_tool(self._graph, tool_call.function.name, args)
+                tool_calls.append({
+                    "name": tool_call.function.name,
+                    "arguments": args,
+                    "result": result
+                })
+                
+                tool_result_msg = {
+                    "role": "tool",
+                    "tool_call_id": tool_call.id,
+                    "content": result
                 }
-            ))
+                current_tool_results.append(tool_result_msg)
             
-        except Exception as e:
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=False,
-                error=str(e)
-            ))
+            messages_history.extend(current_tool_results)
+            
+            response = self._client.send_message_with_history(messages_history)
+            message = response.choices[0].message
+        
+        final_content = message.content or ""
+        content = accumulated_content + final_content if accumulated_content else final_content
+        
+        if not content:
+            content = "(无回复)"
+        
+        if tool_calls:
+            tool_names = [tc["name"] for tc in tool_calls]
+            content = f"已执行工具: {', '.join(tool_names)}\n\n{content}"
+        
+        if rejected_tools:
+            rejected_info = "\n".join([f"{name}: {reason}" for name, reason in rejected_tools])
+            content += f"\n\n部分工具调用被限制:\n{rejected_info}"
+            content += f"\n\n工具调用统计:\n{self._tool_limiter.get_summary()}"
+        
+        return {
+            "success": True,
+            "content": content,
+            "tool_calls": tool_calls,
+            "rejected_tools": rejected_tools
+        }
 
-    def _handle_execute_tool(self, request: BackendRequest) -> None:
-        """处理直接工具调用请求（前端直接调用，不受次数限制）"""
+    def _handle_execute_tool(self, body: Dict) -> Dict:
+        from .tool_executor import execute_tool
+        
         try:
-            tool_name = request.payload.get("tool_name")
-            arguments = request.payload.get("arguments", {})
+            tool_name = body.get("tool_name")
+            arguments = body.get("arguments", {})
             
-            # 前端直接调用的工具不受次数限制，直接执行
             result = execute_tool(self._graph, tool_name, arguments)
             
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=True,
-                data={"result": result}
-            ))
-            
+            return {"success": True, "result": result}
         except Exception as e:
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=False,
-                error=str(e)
-            ))
+            return {"success": False, "error": str(e)}
 
-    def _handle_get_status(self, request: BackendRequest) -> None:
-        try:
-            status = {
-                "graph_initialized": self._graph is not None,
-                "client_initialized": self._client is not None,
-                "running": self._running
-            }
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=True,
-                data=status
-            ))
-        except Exception as e:
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=False,
-                error=str(e)
-            ))
+    def _handle_get_status(self) -> Dict:
+        return {
+            "running": self._running,
+            "config": self._config,
+            "graph_initialized": self._graph is not None,
+            "client_initialized": self._client is not None
+        }
 
-    def _handle_get_config(self, request: BackendRequest) -> None:
-        try:
-            config = self.get_config()
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=True,
-                data=config
-            ))
-        except Exception as e:
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=False,
-                error=str(e)
-            ))
+    def _handle_get_config(self) -> Dict:
+        return self._config.copy()
 
-    def _handle_set_config(self, request: BackendRequest) -> None:
-        try:
-            api_key = request.payload.get("api_key", "")
-            base_url = request.payload.get("base_url", "https://api.deepseek.com")
-            self.update_config(api_key, base_url)
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=True,
-                data={"status": "config_updated"}
-            ))
-        except Exception as e:
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=False,
-                error=str(e)
-            ))
-
-    def _handle_get_history(self, request: BackendRequest) -> None:
-        try:
-            history = self.get_message_history()
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=True,
-                data={"history": history}
-            ))
-        except Exception as e:
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=False,
-                error=str(e)
-            ))
-
-    def _handle_save_history(self, request: BackendRequest) -> None:
-        try:
-            messages = request.payload.get("messages", [])
-            self.save_message_history(messages)
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=True,
-                data={"status": "history_saved"}
-            ))
-        except Exception as e:
-            self._send_response(request, BackendResponse(
-                request_id=request.request_id,
-                success=False,
-                error=str(e)
-            ))
-
-    def _send_response(self, request: BackendRequest, response: BackendResponse) -> None:
-        if request.response_queue:
-            request.response_queue.put(response)
-
-    def process_message(self, user_input: str, timeout: float = 30.0) -> Dict[str, Any]:
-        request_id = f"{time.time()}"
-        response_queue = queue.Queue()
+    def _handle_set_config(self, body: Dict) -> Dict:
+        api_key = body.get("api_key", "")
+        base_url = body.get("base_url", "https://api.deepseek.com")
+        model = body.get("model", "deepseek-chat")
         
-        request = BackendRequest(
-            request_id=request_id,
-            message_type=MessageType.PROCESS_MESSAGE,
-            payload={"user_input": user_input},
-            response_queue=response_queue
+        self.update_config(api_key, base_url, model)
+        self._save_config()
+        return {"status": "config_updated"}
+
+    def _handle_get_history(self) -> Dict:
+        return {"history": self._message_history}
+
+    def _handle_save_history(self, body: Dict) -> Dict:
+        messages = body.get("messages", [])
+        self._message_history = messages
+        return {"status": "history_saved"}
+
+    def _send_response(self, request_id: str, response: PacketResponse) -> None:
+        with self._lock:
+            q = self._response_queues.pop(request_id, None)
+        if q:
+            q.put(response)
+
+    def send(self, packet: Packet) -> Packet:
+        resp_q = queue.Queue()
+        
+        with self._lock:
+            self._response_queues[packet.id] = resp_q
+        
+        self._input_queue.put(packet)
+        
+        try:
+            response = resp_q.get(timeout=30.0)
+            return Packet(
+                id=response.id,
+                type=packet.type,
+                body={
+                    "success": response.success,
+                    "data": response.data,
+                    "error": response.error
+                }
+            )
+        except queue.Empty:
+            return Packet(
+                id=packet.id,
+                type=packet.type,
+                body={"success": False, "error": "timeout"}
+            )
+        finally:
+            with self._lock:
+                self._response_queues.pop(packet.id, None)
+
+    def process_message(self, user_input: str) -> Dict[str, Any]:
+        packet = Packet(
+            id=f"{time.time()}",
+            type=PacketType.PROCESS_MESSAGE,
+            body={"user_input": user_input}
         )
         
-        self._request_queue.put(request)
-        
-        try:
-            response = response_queue.get(timeout=timeout)
-            if not response.success:
-                raise Exception(response.error)
-            return response.data
-        except queue.Empty:
-            raise TimeoutError("请求超时")
+        response = self.send(packet)
+        return response.body
 
-    def execute_tool(self, tool_name: str, arguments: Dict[str, Any], timeout: float = 10.0) -> str:
-        request_id = f"{time.time()}"
-        response_queue = queue.Queue()
-        
-        request = BackendRequest(
-            request_id=request_id,
-            message_type=MessageType.EXECUTE_TOOL,
-            payload={"tool_name": tool_name, "arguments": arguments},
-            response_queue=response_queue
+    def execute_tool(self, tool_name: str, arguments: Dict[str, Any]) -> Dict[str, Any]:
+        packet = Packet(
+            id=f"{time.time()}",
+            type=PacketType.EXECUTE_TOOL,
+            body={"tool_name": tool_name, "arguments": arguments}
         )
         
-        self._request_queue.put(request)
+        response = self.send(packet)
+        return response.body
+
+    def update_config(self, api_key: str, base_url: str = "https://api.deepseek.com", model: str = "deepseek-chat") -> None:
+        with self._lock:
+            self._config["api_key"] = api_key
+            self._config["base_url"] = base_url
+            self._config["model"] = model
         
-        try:
-            response = response_queue.get(timeout=timeout)
-            if not response.success:
-                raise Exception(response.error)
-            return response.data["result"]
-        except queue.Empty:
-            raise TimeoutError("工具执行超时")
+        if api_key and self._graph:
+            from .graph_client import GraphMemoryClient
+            self._client = GraphMemoryClient(
+                api_key=api_key,
+                base_url=base_url,
+                model=model,
+                graph=self._graph
+            )
+
+    def get_config(self) -> Dict[str, str]:
+        return self._config.copy()
+
+    def save_message_history(self, messages: list) -> None:
+        self._message_history = messages
+
+    def get_message_history(self) -> list:
+        return self._message_history.copy()
 
     def shutdown(self) -> None:
         if not self._running:
             return
         
-        request_id = f"{time.time()}"
-        response_queue = queue.Queue()
-        
-        request = BackendRequest(
-            request_id=request_id,
-            message_type=MessageType.SHUTDOWN,
-            payload={},
-            response_queue=response_queue
+        packet = Packet(
+            id=f"{time.time()}",
+            type=PacketType.SHUTDOWN,
+            body={}
         )
-        
-        self._request_queue.put(request)
+        self.send(packet)
         
         if self._thread:
             self._thread.join(timeout=2.0)
@@ -396,22 +399,5 @@ class BackendServer:
         if self._graph:
             self._graph.close()
             self._graph = None
-
-    def update_config(self, api_key: str, base_url: str = "https://api.deepseek.com") -> None:
-        with self._lock:
-            self._config = {"api_key": api_key, "base_url": base_url}
-            if api_key and self._graph:
-                self._client = GraphMemoryClient(
-                    api_key=api_key,
-                    base_url=base_url,
-                    graph=self._graph
-                )
-
-    def get_config(self) -> Dict[str, str]:
-        return getattr(self, "_config", {"api_key": "", "base_url": "https://api.deepseek.com"})
-
-    def save_message_history(self, messages: list) -> None:
-        self._message_history = messages
-
-    def get_message_history(self) -> list:
-        return getattr(self, "_message_history", [])
\ No newline at end of file
+        
+        self._running = False
\ No newline at end of file
diff --git a/core/tools/__init__.py b/core/tools/__init__.py
index 0a0ad7d..b562edc 100644
--- a/core/tools/__init__.py
+++ b/core/tools/__init__.py
@@ -2,7 +2,7 @@
 工具定义模块
 """
 from .memory_tools import TOOLS
-from .tool_executor import execute_tool
-from .tool_limiter import ToolLimiter, ToolLimits, ToolCallCount
+from ..tool_executor import execute_tool
+from ..tool_limiter import ToolLimiter, ToolLimits, ToolCallCount
 
 __all__ = ["TOOLS", "execute_tool", "ToolLimiter", "ToolLimits", "ToolCallCount"]
diff --git a/core/tools/tool_executor.py b/core/tools/tool_executor.py
deleted file mode 100644
index 28f70d6..0000000
--- a/core/tools/tool_executor.py
+++ /dev/null
@@ -1,307 +0,0 @@
-"""
-工具执行器
-"""
-import json
-from typing import Any, Dict
-
-
-def execute_tool(graph: Any, tool_name: str, arguments: dict) -> str:
-    """执行工具调用"""
-    print(f"\n[工具调用] {tool_name}")
-    print(f"[参数] {json.dumps(arguments, ensure_ascii=False, indent=2)}")
-    
-    try:
-        # 基础记忆工具
-        if tool_name == "memory_recall":
-            result = graph.recall(
-                query_intent=arguments.get("query_intent", ""),
-                seed_entities=arguments.get("seed_entities"),
-                depth=arguments.get("depth", 2),
-                time_range=arguments.get("time_range"),
-                session_filter=arguments.get("session_filter")
-            )
-            return format_recall_result(result)
-        
-        elif tool_name == "memory_commit":
-            result = graph.commit(
-                triplets=arguments.get("triplets", []),
-                entity_types=arguments.get("entity_types"),
-                temporal_tag=arguments.get("temporal_tag")
-            )
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "memory_purge":
-            result = graph.purge(
-                criteria=arguments.get("criteria", {}),
-                mode=arguments.get("mode", "soft"),
-                new_relation=arguments.get("new_relation")
-            )
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "memory_introspect":
-            result = graph.introspect(session_id=arguments.get("session_id"))
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "memory_archive":
-            result = graph.archive(days=arguments.get("days", 30))
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "memory_cleanup":
-            result = graph.cleanup(dry_run=arguments.get("dry_run", True))
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        # 人设图管理工具
-        elif tool_name == "persona_update":
-            result = execute_persona_update(graph, arguments)
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "persona_clear":
-            result = execute_persona_clear(graph, arguments)
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        # 工作记忆链管理工具
-        elif tool_name == "task_create":
-            result = execute_task_create(graph, arguments)
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "task_set_state":
-            result = execute_task_set_state(graph, arguments)
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "task_delete":
-            result = execute_task_delete(graph, arguments)
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        elif tool_name == "task_link_info":
-            result = execute_task_link_info(graph, arguments)
-            return json.dumps(result, ensure_ascii=False, default=str)
-        
-        return f"未知工具: {tool_name}"
-    
-    except Exception as e:
-        return f"工具执行错误: {str(e)}"
-
-
-def format_recall_result(result: dict) -> str:
-    """格式化检索结果"""
-    lines = ["===== 记忆检索结果 ====="]
-    
-    if result.get("entities"):
-        lines.append(f"\n实体 ({len(result['entities'])} 个):")
-        for e in result["entities"]:
-            if e and isinstance(e, dict):
-                lines.append(f"  - {e.get('name', 'N/A')} (类型: {e.get('type', 'unknown')}, 提及: {e.get('mention_count', 1)}次)")
-    
-    if result.get("relations"):
-        lines.append(f"\n关系 ({len(result['relations'])} 条):")
-        for r in result["relations"]:
-            if r and isinstance(r, dict):
-                lines.append(f"  - {r.get('source', 'N/A')} --[{r.get('type', 'N/A')}]--> {r.get('target', 'N/A')}")
-                created = r.get("created_at", "N/A")
-                if created and created != "N/A":
-                    created = created[:19] if "T" in str(created) else str(created)
-                session_id = r.get('session_id', 'N/A')
-                session_display = session_id[:20] if session_id and session_id != 'N/A' else 'N/A'
-                lines.append(f"    时间: {created}, 会话: {session_display}, 轮次: {r.get('turn_id', 0)}, 置信度: {r.get('confidence', 1.0)}")
-    
-    if not result.get("entities") and not result.get("relations"):
-        lines.append("\n(未找到相关记忆)")
-    
-    lines.append("=" * 30)
-    return "\n".join(lines)
-
-
-# 人设图管理工具实现
-def execute_persona_update(graph: Any, arguments: dict) -> dict:
-    """更新人设"""
-    attributes = arguments.get("attributes", [])
-    mode = arguments.get("mode", "merge")
-    
-    if mode == "replace":
-        # 先清除旧人设
-        graph.purge(
-            criteria={"subject_contains": "AI", "relation_type": "扮演角色"},
-            mode="soft"
-        )
-        graph.purge(
-            criteria={"subject_contains": "AI", "relation_type": "说话风格"},
-            mode="soft"
-        )
-        graph.purge(
-            criteria={"subject_contains": "AI", "relation_type": "性格特点"},
-            mode="soft"
-        )
-    
-    # 写入新人设
-    triplets = []
-    for attr in attributes:
-        triplets.append({
-            "subject": "AI",
-            "relation": attr["attribute"],
-            "object": attr["value"],
-            "confidence": 1.0
-        })
-    
-    result = graph.commit(triplets=triplets)
-    return {
-        "status": "success",
-        "mode": mode,
-        "updated_attributes": len(attributes),
-        "details": result
-    }
-
-
-def execute_persona_clear(graph: Any, arguments: dict) -> dict:
-    """清除人设"""
-    if not arguments.get("confirm", True):
-        return {"status": "cancelled", "message": "需要确认才能清除人设"}
-    
-    # 删除所有人设相关关系
-    result1 = graph.purge(
-        criteria={"subject_contains": "AI", "relation_type": "扮演角色"},
-        mode="soft"
-    )
-    result2 = graph.purge(
-        criteria={"subject_contains": "AI", "relation_type": "说话风格"},
-        mode="soft"
-    )
-    result3 = graph.purge(
-        criteria={"subject_contains": "AI", "relation_type": "性格特点"},
-        mode="soft"
-    )
-    result4 = graph.purge(
-        criteria={"subject_contains": "AI", "relation_type": "语气特征"},
-        mode="soft"
-    )
-    
-    total_deleted = (
-        result1.get("deleted_count", 0) +
-        result2.get("deleted_count", 0) +
-        result3.get("deleted_count", 0) +
-        result4.get("deleted_count", 0)
-    )
-    
-    return {
-        "status": "success",
-        "deleted_count": total_deleted,
-        "message": "人设已清除，恢复默认身份"
-    }
-
-
-# 工作记忆链管理工具实现
-def execute_task_create(graph: Any, arguments: dict) -> dict:
-    """创建任务节点"""
-    task_id = arguments.get("task_id")
-    description = arguments.get("description")
-    info_nodes = arguments.get("info_nodes", [])
-    
-    # 创建任务节点
-    triplets = [
-        {"subject": task_id, "relation": "is_type", "object": "TaskNode"},
-        {"subject": task_id, "relation": "has_description", "object": description},
-        {"subject": task_id, "relation": "HAS_STATE", "object": "State_进行中"}
-    ]
-    
-    result = graph.commit(triplets=triplets)
-    
-    # 关联信息节点
-    if info_nodes:
-        link_triplets = []
-        for node_name in info_nodes:
-            link_triplets.append({
-                "subject": task_id,
-                "relation": "CONTAINS_INFO",
-                "object": node_name
-            })
-        graph.commit(triplets=link_triplets)
-    
-    return {
-        "status": "success",
-        "task_id": task_id,
-        "description": description,
-        "info_nodes": info_nodes,
-        "details": result
-    }
-
-
-def execute_task_set_state(graph: Any, arguments: dict) -> dict:
-    """设置任务状态"""
-    task_id = arguments.get("task_id")
-    state = arguments.get("state")
-    
-    # 删除旧状态
-    graph.purge(
-        criteria={"subject_contains": task_id, "relation_type": "HAS_STATE"},
-        mode="soft"
-    )
-    
-    # 设置新状态
-    state_node = f"State_{state}"
-    result = graph.commit(
-        triplets=[{"subject": task_id, "relation": "HAS_STATE", "object": state_node}]
-    )
-    
-    return {
-        "status": "success",
-        "task_id": task_id,
-        "new_state": state,
-        "details": result
-    }
-
-
-def execute_task_delete(graph: Any, arguments: dict) -> dict:
-    """删除任务节点"""
-    task_id = arguments.get("task_id")
-    delete_info_nodes = arguments.get("delete_info_nodes", True)
-    
-    # 查询关联的信息节点
-    if delete_info_nodes:
-        recall_result = graph.recall(
-            query_intent=f"{task_id},CONTAINS_INFO",
-            depth=1
-        )
-        
-        # 删除信息节点
-        for relation in recall_result.get("relations", []):
-            if relation.get("type") == "CONTAINS_INFO" and relation.get("source") == task_id:
-                info_node = relation.get("target")
-                graph.purge(
-                    criteria={"subject_contains": info_node},
-                    mode="soft"
-                )
-    
-    # 删除任务节点
-    result = graph.purge(
-        criteria={"subject_contains": task_id},
-        mode="soft"
-    )
-    
-    return {
-        "status": "success",
-        "task_id": task_id,
-        "deleted_info_nodes": delete_info_nodes,
-        "details": result
-    }
-
-
-def execute_task_link_info(graph: Any, arguments: dict) -> dict:
-    """关联信息节点"""
-    task_id = arguments.get("task_id")
-    info_node_names = arguments.get("info_node_names", [])
-    
-    triplets = []
-    for node_name in info_node_names:
-        triplets.append({
-            "subject": task_id,
-            "relation": "CONTAINS_INFO",
-            "object": node_name
-        })
-    
-    result = graph.commit(triplets=triplets)
-    
-    return {
-        "status": "success",
-        "task_id": task_id,
-        "linked_nodes": info_node_names,
-        "details": result
-    }
diff --git a/core/tools/tool_limiter.py b/core/tools/tool_limiter.py
deleted file mode 100644
index 9f0f614..0000000
--- a/core/tools/tool_limiter.py
+++ /dev/null
@@ -1,164 +0,0 @@
-"""
-工具调用限制器 - 限制每轮对话中各类工具的调用次数
-"""
-from typing import Dict, List, Optional
-from dataclasses import dataclass, field
-
-
-@dataclass
-class ToolLimits:
-    """工具调用限制配置"""
-    # 人设图限制
-    persona_query_max: int = 1      # 每轮最多查询1次人设图
-    persona_update_max: int = 1      # 每轮最多修改1次人设图
-    
-    # 工作记忆链限制
-    task_query_max: int = 4          # 每轮最多查询4次工作记忆链
-    task_update_max: int = 2          # 每轮最多修改2次工作记忆链
-    
-    # 一般记忆限制
-    memory_query_max: int = 20        # 每轮最多查询20次一般记忆
-    memory_update_max: int = 10        # 每轮最多修改10次一般记忆
-
-
-@dataclass
-class ToolCallCount:
-    """工具调用计数"""
-    # 人设图
-    persona_query: int = 0
-    persona_update: int = 0
-    
-    # 工作记忆链
-    task_query: int = 0
-    task_update: int = 0
-    
-    # 一般记忆
-    memory_query: int = 0
-    memory_update: int = 0
-
-
-class ToolLimiter:
-    """工具调用限制器"""
-    
-    def __init__(self, limits: Optional[ToolLimits] = None):
-        self.limits = limits or ToolLimits()
-        self.counts = ToolCallCount()
-    
-    def _classify_tool(self, tool_name: str, arguments: dict) -> tuple:
-        """
-        分类工具调用
-        返回: (category, operation)
-        category: 'persona', 'task', 'memory'
-        operation: 'query', 'update'
-        """
-        # 人设图工具
-        if tool_name in ('persona_update', 'persona_clear'):
-            return ('persona', 'update')
-        
-        # 工作记忆链工具
-        if tool_name in ('task_create', 'task_set_state', 'task_delete', 'task_link_info'):
-            # task_link_info 是关联操作，算作更新
-            return ('task', 'update')
-        
-        # 一般记忆工具
-        if tool_name == 'memory_recall':
-            # 判断是查询人设图、工作记忆链还是一般记忆
-            query_intent = arguments.get('query_intent', '').lower()
-            
-            # 检查是否查询人设图
-            if any(kw in query_intent for kw in ['人设', '角色', '性格', '语气', '说话风格', '扮演']):
-                return ('persona', 'query')
-            
-            # 检查是否查询工作记忆链
-            if any(kw in query_intent for kw in ['tasknode', '工作记忆', '任务链', '任务', 'task']):
-                return ('task', 'query')
-            
-            # 一般记忆查询
-            return ('memory', 'query')
-        
-        if tool_name == 'memory_commit':
-            return ('memory', 'update')
-        
-        if tool_name == 'memory_purge':
-            return ('memory', 'update')
-        
-        if tool_name == 'memory_introspect':
-            return ('memory', 'query')
-        
-        if tool_name in ('memory_archive', 'memory_cleanup'):
-            return ('memory', 'update')
-        
-        # 未知工具，归类为一般记忆更新
-        return ('memory', 'update')
-    
-    def can_call(self, tool_name: str, arguments: dict) -> tuple:
-        """
-        检查是否允许调用工具
-        返回: (allowed, reason)
-        """
-        category, operation = self._classify_tool(tool_name, arguments)
-        
-        # 获取当前计数和限制
-        if category == 'persona':
-            if operation == 'query':
-                if self.counts.persona_query >= self.limits.persona_query_max:
-                    return (False, f"人设图查询次数已达上限({self.limits.persona_query_max}次)")
-            else:  # update
-                if self.counts.persona_update >= self.limits.persona_update_max:
-                    return (False, f"人设图修改次数已达上限({self.limits.persona_update_max}次)")
-        
-        elif category == 'task':
-            if operation == 'query':
-                if self.counts.task_query >= self.limits.task_query_max:
-                    return (False, f"工作记忆链查询次数已达上限({self.limits.task_query_max}次)")
-            else:  # update
-                if self.counts.task_update >= self.limits.task_update_max:
-                    return (False, f"工作记忆链修改次数已达上限({self.limits.task_update_max}次)")
-        
-        elif category == 'memory':
-            if operation == 'query':
-                if self.counts.memory_query >= self.limits.memory_query_max:
-                    return (False, f"一般记忆查询次数已达上限({self.limits.memory_query_max}次)")
-            else:  # update
-                if self.counts.memory_update >= self.limits.memory_update_max:
-                    return (False, f"一般记忆修改次数已达上限({self.limits.memory_update_max}次)")
-        
-        return (True, "允许调用")
-    
-    def record_call(self, tool_name: str, arguments: dict) -> None:
-        """记录工具调用"""
-        category, operation = self._classify_tool(tool_name, arguments)
-        
-        if category == 'persona':
-            if operation == 'query':
-                self.counts.persona_query += 1
-            else:
-                self.counts.persona_update += 1
-        
-        elif category == 'task':
-            if operation == 'query':
-                self.counts.task_query += 1
-            else:
-                self.counts.task_update += 1
-        
-        elif category == 'memory':
-            if operation == 'query':
-                self.counts.memory_query += 1
-            else:
-                self.counts.memory_update += 1
-    
-    def get_summary(self) -> str:
-        """获取调用统计摘要"""
-        lines = [
-            f"人设图: 查询{self.counts.persona_query}/{self.limits.persona_query_max}次, "
-            f"修改{self.counts.persona_update}/{self.limits.persona_update_max}次",
-            f"工作记忆链: 查询{self.counts.task_query}/{self.limits.task_query_max}次, "
-            f"修改{self.counts.task_update}/{self.limits.task_update_max}次",
-            f"一般记忆: 查询{self.counts.memory_query}/{self.limits.memory_query_max}次, "
-            f"修改{self.counts.memory_update}/{self.limits.memory_update_max}次"
-        ]
-        return "\n".join(lines)
-    
-    def reset(self) -> None:
-        """重置计数（新的一轮对话开始时调用）"""
-        self.counts = ToolCallCount()
diff --git a/docs/api.md b/docs/api.md
index d7cd31e..5967144 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -4,7 +4,7 @@
 
 ## 概述
 
-TrulyMEM 后端采用**请求-响应队列模式**，通过 `queue.Queue` 实现线程安全通信。后端在独立线程中运行，处理来自客户端的请求。
+TrulyMEM 后端采用 **Packet 通信协议**，通过 `queue.Queue` 实现线程安全通信。后端在独立线程中运行，处理来自客户端的请求。
 
 ### 核心组件
 
@@ -12,50 +12,51 @@ TrulyMEM 后端采用**请求-响应队列模式**，通过 `queue.Queue` 实现
 |------|------|
 | `BackendServer` | 后端服务器，独立线程运行 |
 | `BackendClient` | 客户端封装，提供便捷方法 |
-| `MessageType` | 请求类型枚举 |
-| `BackendRequest` | 请求数据包 |
-| `BackendResponse` | 响应数据包 |
+| `PacketType` | 请求类型枚举 |
+| `Packet` | 数据包（请求） |
+| `PacketResponse` | 数据包响应 |
 
 ---
 
-## 请求类型 (MessageType)
+## 请求类型 (PacketType)
 
 ```python
-class MessageType(Enum):
+class PacketType(Enum):
     PROCESS_MESSAGE = "process_message"  # 处理消息
     EXECUTE_TOOL = "execute_tool"        # 执行工具
     GET_STATUS = "get_status"            # 获取状态
     GET_CONFIG = "get_config"            # 获取配置
     SET_CONFIG = "set_config"            # 设置配置
-    GET_HISTORY = "get_history"          # 获取历史
-    SAVE_HISTORY = "save_history"        # 保存历史
-    SHUTDOWN = "shutdown"                # 关闭服务
+    GET_HISTORY = "get_history"           # 获取历史
+    SAVE_HISTORY = "save_history"         # 保存历史
+    SHUTDOWN = "shutdown"                 # 关闭服务
 ```
 
 ---
 
 ## 数据包格式
 
-### BackendRequest
+### Packet
 
 ```python
 @dataclass
-class BackendRequest:
-    request_id: str                    # 请求唯一标识
-    message_type: MessageType          # 请求类型
-    payload: Dict[str, Any]            # 请求参数
-    response_queue: queue.Queue        # 响应队列（用于返回结果）
+class Packet:
+    id: str                      # 唯一标识
+    type: PacketType             # 请求类型
+    body: Dict[str, Any]        # 请求参数
+    response_queue: queue.Queue # 响应队列（可选）
+    created_at: float           # 创建时间
 ```
 
-### BackendResponse
+### PacketResponse
 
 ```python
 @dataclass
-class BackendResponse:
-    request_id: str                    # 对应的请求ID
-    success: bool                      # 是否成功
-    data: Any = None                   # 返回数据
-    error: Optional[str] = None        # 错误信息
+class PacketResponse:
+    id: str                      # 对应的请求ID
+    success: bool                # 是否成功
+    data: Any = None             # 返回数据
+    error: Optional[str] = None  # 错误信息
 ```
 
 ---
@@ -68,14 +69,15 @@ class BackendResponse:
 
 **请求参数：**
 ```python
-payload = {
+body = {
     "user_input": str  # 用户输入的消息
 }
 ```
 
 **响应数据：**
 ```python
-data = {
+{
+    "success": True,
     "content": str,           # AI 回复内容
     "tool_calls": [           # 工具调用记录
         {
@@ -92,11 +94,16 @@ data = {
 
 **示例：**
 ```python
-from core import BackendClient
+from core import BackendServer, BackendClient
+
+server = BackendServer(db_path="graph_memory.db", use_embedded_db=True)
+server.start(api_key="your-api-key")
 
 client = BackendClient(server)
 result = client.process_message("你好，请记住我的名字是小明")
-# result = {"success": True, "data": {"content": "...", "tool_calls": [...]}}
+
+if result.get("success"):
+    print(result["content"])
 ```
 
 ---
@@ -109,15 +116,16 @@ result = client.process_message("你好，请记住我的名字是小明")
 
 **请求参数：**
 ```python
-payload = {
+body = {
     "tool_name": str,     # 工具名称
-    "arguments": dict     # 工具参数
+    "arguments": dict    # 工具参数
 }
 ```
 
 **响应数据：**
 ```python
-data = {
+{
+    "success": True,
     "result": str  # 工具执行结果
 }
 ```
@@ -135,22 +143,23 @@ result = client.execute_tool("memory_recall", {"query_intent": "用户信息"})
 
 **请求参数：**
 ```python
-payload = {}  # 无参数
+body = {}  # 无参数
 ```
 
 **响应数据：**
 ```python
-data = {
-    "graph_initialized": bool,  # 图数据库是否初始化
-    "client_initialized": bool, # API 客户端是否初始化
-    "running": bool             # 后端是否运行中
+{
+    "running": bool,              # 后端是否运行中
+    "config": dict,              # 当前配置
+    "graph_initialized": bool,   # 图数据库是否初始化
+    "client_initialized": bool   # API 客户端是否初始化
 }
 ```
 
 **示例：**
 ```python
 status = client.get_status()
-# status = {"success": True, "data": {"running": True, ...}}
+print(status["data"]["running"])  # True
 ```
 
 ---
@@ -161,12 +170,12 @@ status = client.get_status()
 
 **请求参数：**
 ```python
-payload = {}  # 无参数
+body = {}  # 无参数
 ```
 
 **响应数据：**
 ```python
-data = {
+{
     "api_key": str,   # API Key
     "base_url": str   # API Base URL
 }
@@ -180,7 +189,7 @@ data = {
 
 **请求参数：**
 ```python
-payload = {
+body = {
     "api_key": str,    # API Key
     "base_url": str    # API Base URL (默认: https://api.deepseek.com)
 }
@@ -188,7 +197,7 @@ payload = {
 
 **响应数据：**
 ```python
-data = {
+{
     "status": "config_updated"
 }
 ```
@@ -209,12 +218,12 @@ result = client.update_config(
 
 **请求参数：**
 ```python
-payload = {}  # 无参数
+body = {}  # 无参数
 ```
 
 **响应数据：**
 ```python
-data = {
+{
     "history": list  # 消息历史列表
 }
 ```
@@ -227,14 +236,14 @@ data = {
 
 **请求参数：**
 ```python
-payload = {
+body = {
     "messages": list  # 消息列表
 }
 ```
 
 **响应数据：**
 ```python
-data = {
+{
     "status": "history_saved"
 }
 ```
@@ -247,12 +256,12 @@ data = {
 
 **请求参数：**
 ```python
-payload = {}  # 无参数
+body = {}  # 无参数
 ```
 
 **响应数据：**
 ```python
-data = {
+{
     "status": "shutdown"
 }
 ```
@@ -275,36 +284,36 @@ client = BackendClient(server)
 
 # 3. 发送消息
 result = client.process_message("你好")
-print(result["data"]["content"])
+print(result["content"])
 
 # 4. 关闭
 client.shutdown()
 ```
 
-### 直接使用请求队列
+### 使用 Packet 协议
 
 ```python
 import queue
-from core import BackendServer, MessageType, BackendRequest, BackendResponse
+from core import BackendServer, Packet, PacketType
 
 server = BackendServer()
 server.start(api_key="your-key")
 
-# 创建请求
+# 创建请求包
 response_queue = queue.Queue()
-request = BackendRequest(
-    request_id="req-001",
-    message_type=MessageType.PROCESS_MESSAGE,
-    payload={"user_input": "你好"},
+packet = Packet(
+    id="req-001",
+    type=PacketType.PROCESS_MESSAGE,
+    body={"user_input": "你好"},
     response_queue=response_queue
 )
 
 # 发送请求
-server._request_queue.put(request)
+result = server.send(packet)
+print(result.body)
 
-# 等待响应
-response = response_queue.get(timeout=30.0)
-print(response.data)
+# 关闭
+server.shutdown()
 ```
 
 ---
@@ -357,7 +366,7 @@ client = BackendClient(server)
 async def handler(websocket):
     async for message in websocket:
         data = json.loads(message)
-        msg_type = data["type"]
+        msg_type = data.get("type")
         
         if msg_type == "message":
             result = client.process_message(data["content"])
@@ -373,41 +382,18 @@ async def handler(websocket):
 async def main():
     server.start()
     async with websockets.serve(handler, "localhost", 8765):
-        await asyncio.Future()  # run forever
+        await asyncio.Future()
 
 asyncio.run(main())
 ```
 
-### 扩展为 gRPC
-
-```protobuf
-// truly_mem.proto
-syntax = "proto3";
-
-service TrulyMEM {
-    rpc ProcessMessage(MessageRequest) returns (MessageResponse);
-    rpc UpdateConfig(ConfigRequest) returns (ConfigResponse);
-    rpc GetStatus(Empty) returns (StatusResponse);
-}
-
-message MessageRequest {
-    string message = 1;
-}
-
-message MessageResponse {
-    bool success = 1;
-    string content = 2;
-    string error = 3;
-}
-```
-
 ---
 
 ## 线程安全说明
 
 - `BackendServer` 使用 `threading.Lock` 保护共享资源
 - 所有请求通过 `queue.Queue` 传递，线程安全
-- 响应通过每个请求独立的 `response_queue` 返回
+- 响应通过每个请求独立的响应队列返回
 - 默认超时时间：30 秒
 
 ---
@@ -463,4 +449,4 @@ message MessageResponse {
 |---------|------|
 | `API Key 未配置` | 未设置 API Key |
 | `timeout` | 请求超时 |
-| `工具调用被拒绝: ...` | 工具调用频率超限 |
+| `工具调用被拒绝: ...` | 工具调用频率超限 |
\ No newline at end of file
diff --git a/docs/一键启动指南.md b/docs/一键启动指南.md
index ae34979..37fa885 100644
--- a/docs/一键启动指南.md
+++ b/docs/一键启动指南.md
@@ -5,20 +5,17 @@
 ### 从源码运行
 
 ```bash
-# 克隆仓库
 git clone <repo-url>
 cd TrulyMEM-TrueHumanMEM
 
-# 安装依赖
 pip install -r requirements.txt
 
-# 运行
 python trulymem_entry.py
 ```
 
 ### 打包后运行
 
-打包后会生成可执行文件（Windows: TrulyMEM.exe, Linux/macOS: TrulyMEM）：
+打包后会生成可执行文件：
 
 ```bash
 # Linux/macOS
@@ -38,9 +35,11 @@ TrulyMEM.exe
 
 1. 运行应用
 2. 按 **F2** 展开侧边栏
-3. 输入 **API Key**
+3. 输入 **API Key**、**模型**、**Base URL**
 4. 按 **Enter** 保存
 
+配置会自动保存到 `~/.trulymem/config.json`，下次启动自动加载。
+
 ## 快捷键
 
 | 按键 | 功能 |
@@ -53,9 +52,32 @@ TrulyMEM.exe
 
 ## 数据存储
 
-- **数据库**: `graph_memory.db`（应用目录）
-- **配置**: `config.json`（应用目录）
-- **格式**: SQLite
+| 数据 | 位置 |
+|------|------|
+| 图数据库 | `graph_memory.db`（应用目录） |
+| 配置文件 | `~/.trulymem/config.json` |
+| 数据库格式 | SQLite |
+
+## 架构说明
+
+### 通信协议
+
+UI 与后端通过 **Packet 协议** 通信：
+
+```
+UI (Textual TUI)
+    ↓ BackendClient
+Packet → queue.Queue → BackendServer (独立线程)
+    ↓
+处理请求 → 返回响应
+```
+
+### 配置管理
+
+- **存储位置**: `~/.trulymem/config.json`
+- **自动加载**: 启动时从文件读取配置
+- **动态更新**: 运行时修改配置立即生效
+- **持久化**: 修改后自动保存到文件
 
 ## 常见问题
 
@@ -85,7 +107,7 @@ pip install -r requirements.txt
 # 运行测试
 pytest tests/
 
-# 打包（需 PyInstaller）
+# 打包
 bash build/build_windows.bat   # Windows
 bash build/build_linux.sh       # Linux
-```
+```
\ No newline at end of file
diff --git a/docs/架构.md b/docs/架构.md
index a6f3a4a..0304c66 100644
--- a/docs/架构.md
+++ b/docs/架构.md
@@ -6,6 +6,7 @@
 - 极简视觉，信息密度优先
 - 工具痕迹默认隐藏，需要时可展开
 - TUI 与后端分离，多线程通信
+- **一切皆图**，AI 推理全部在后端
 
 ## 项目结构
 
@@ -14,53 +15,25 @@ TrulyMEM-TrueHumanMEM/
 ├── trulymem_entry.py    # 入口：先启动 core → 再启动 ui
 ├── core/               # 后端/业务逻辑
 │   ├── __init__.py     # 导出 BackendServer, BackendClient, EmbeddedGraphDB
-│   ├── server.py       # BackendServer (多线程队列通信)
-│   ├── client.py      # BackendClient
+│   ├── server.py       # BackendServer (Packet 通信协议)
+│   ├── client.py       # BackendClient (Packet 协议客户端)
 │   ├── embedded_db.py # SQLite 图数据库实现
-│   ├── graph_client.py
-│   ├── tool_executor.py  # 工具执行器
+│   ├── graph_client.py # OpenAI/DeepSeek API 客户端
+│   ├── tool_executor.py # 工具执行器
 │   ├── tool_limiter.py  # 工具调用限制器
-│   ├── memory_tools.py  # 工具定义
-│   ├── prompts/       # 提示词管理
+│   ├── tools/          # 工具定义
 │   │   ├── __init__.py
-│   │   ├── prompt_manager.py
-│   │   └── templates/
-│   │       └── system_prompt.md
-│   └── tools/         # 工具模块
-│       ├── __init__.py
-│       ├── memory_tools.py
-│       ├── tool_executor.py
-│       └── tool_limiter.py
-├── ui/               # TUI 显示层
-│   ├── __init__.py    # 导出 GraphMemoryApp, AppConfig
-│   ├── app.py         # GraphMemoryApp (纯显示)
-│   ├── widgets/      # TUI 组件
-│   │   ├── left_panel.py
-│   │   ├── right_panel.py
-│   │   ├── message_history.py
-│   │   ├── message_widget.py
-│   │   ├── input_box.py
-│   │   ├── config_section.py
-│   │   ├── operation_log.py
-│   │   ├── cypher_query_box.py
-│   │   └── status_bar.py
-│   ├── handlers/     # 事件处理
-│   │   ├── focus_handler.py
-│   │   ├── key_handler.py
-│   │   └── message_handler.py
-│   ├── models/       # 数据模型
-│   │   ├── message.py
-│   │   ├── config.py
-│   │   └── log_entry.py
-│   ├── services/     # 服务层
-│   │   ├── config_manager.py
-│   │   ├── config_service.py
-│   │   └── chat_service.py
-│   └── styles/      # 样式文件
-│       ├── app.css
-│       ├── components.css
-│       └── messages.css
-└── tests/            # 测试 (38 tests)
+│   │   └── memory_tools.py
+│   └── prompts/        # 提示词管理
+├── ui/                 # TUI 显示层（仅显示，无 AI 逻辑）
+│   ├── __init__.py     # 导出 GraphMemoryApp, AppConfig
+│   ├── app.py          # GraphMemoryApp (通过 BackendClient 通信)
+│   ├── widgets/        # TUI 组件
+│   ├── handlers/       # 事件处理
+│   ├── models/         # 数据模型
+│   ├── services/       # 服务层（仅配置管理）
+│   └── styles/         # 样式文件
+└── tests/              # 测试 (42 tests)
 ```
 
 ## 架构图
@@ -69,13 +42,14 @@ TrulyMEM-TrueHumanMEM/
 trulymem_entry.py
     │
     ├─ BackendServer.start() → 独立线程运行
-    │   ├─ 处理 PROCESS_MESSAGE 请求
-    │   ├─ 处理 EXECUTE_TOOL 请求
+    │   ├─ 处理 PROCESS_MESSAGE 请求 → AI 推理 + 工具调用
+    │   ├─ 处理 EXECUTE_TOOL 请求 → 外部工具调用（不限次数）
+    │   ├─ 处理 GET/SET_CONFIG 请求
     │   └─ 管理 GraphMemoryClient, EmbeddedGraphDB
     │
     └─ GraphMemoryApp(backend_server=server)
             │
-            └─ BackendClient ← queue.Queue → BackendServer
+            └─ BackendClient ← Packet 通信 → BackendServer
 ```
 
 ## 组件职责
@@ -84,22 +58,38 @@ trulymem_entry.py
 
 | 组件 | 职责 |
 |------|------|
-| `server.py` | 多线程队列通信，处理消息和工具调用 |
-| `client.py` | TUI 端的通信客户端 |
+| `server.py` | Packet 协议处理，多线程队列通信，AI 推理，工具限制 |
+| `client.py` | 客户端封装，UI 与后端通信桥梁 |
 | `embedded_db.py` | SQLite 图数据库 CRUD |
 | `graph_client.py` | OpenAI/DeepSeek API 客户端 |
 | `tool_executor.py` | 工具执行逻辑 |
-| `tool_limiter.py` | 工具调用频率限制 |
+| `tool_limiter.py` | 工具调用频率限制（仅限 AI 推理） |
 
 ### ui/ (显示层)
 
 | 组件 | 职责 |
 |------|------|
-| `app.py` | Textual 应用主类 |
-| `widgets/` | TUI 组件（面板、输入框等） |
-| `handlers/` | 事件处理（键盘、焦点） |
-| `models/` | 数据模型（消息、配置） |
-| `services/` | 配置管理、服务层 |
+| `app.py` | Textual 应用主类，仅通过 BackendClient 通信 |
+| `services/` | 仅配置管理，无 AI 逻辑 |
+
+### 通信协议
+
+UI 与后端通过 **Packet 通信协议** 交互：
+
+```python
+from core import BackendServer, BackendClient, Packet, PacketType
+
+# 后端启动
+server = BackendServer(db_path="graph_memory.db", use_embedded_db=True)
+server.start(api_key="your-key")
+
+# 客户端通信
+client = BackendClient(server)
+result = client.process_message("你好")  # AI 推理
+result = client.execute_tool("memory_introspect", {})  # 外部工具调用
+```
+
+---
 
 ## 数据流
 
@@ -108,21 +98,27 @@ trulymem_entry.py
     ↓
 BackendClient.process_message(user_input)
     ↓
-queue.Queue → BackendServer (独立线程)
+Packet (type=PROCESS_MESSAGE) → queue.Queue
+    ↓
+BackendServer (独立线程)
     ↓
 GraphMemoryClient.send_message_with_history()
     ↓
 OpenAI API / DeepSeek API
     ↓
-execute_tool() → EmbeddedGraphDB
+execute_tool() + ToolLimiter (AI 推理时受限)
+    ↓
+EmbeddedGraphDB (图数据库)
     ↓
 循环调用 API 直到无 tool_calls
     ↓
-queue.Queue → 返回结果
+Packet 响应返回
     ↓
 MessageHistory 显示
 ```
 
+---
+
 ## 启动流程
 
 ```python
@@ -146,82 +142,7 @@ def main():
     backend_server.shutdown()
 ```
 
-## 布局结构
-
-### 默认视图（右侧展开）
-
-```
-┌─────────────────────────────────────┬─────────────────────┐
-│                                     │ F2:隐藏侧边栏        │
-│  🟠 14:30:25                       │ ────────────────────│
-│  用户: 量子力学是什么？              │ API Key: ***       │
-│                                     │ 模型: deepseek-chat │
-│  🔵 14:30:26                       │ Base URL: ...       │
-│  是的！根据记忆...                   │ ────────────────────│
-│  [工具:2次] (F3展开)               │ [操作日志]          │
-│                                     │ 14:30:26 recall    │
-│  ┌─────────────────────────────┐   │ 实体: 量子力学      │
-│  │ 🟠 [输入框...]               │   │ ───────────────────│
-│  └─────────────────────────────┘   │ >[查询...]         │
-└─────────────────────────────────────┴─────────────────────┘
-```
-
-### F2后（右侧折叠）
-
-```
-┌─────────────────────────────────────┐
-│  🟠 14:30:25                       │
-│  用户: 量子力学是什么？              │
-│                                     │
-│  🔵 14:30:26                       │
-│  是的！根据记忆...                   │
-│  [工具:2次] (F3展开)               │
-│                                     │
-│  ┌─────────────────────────────┐   │
-│  │ 🟠 [输入框...]               │   │
-│  └─────────────────────────────┘   │
-│  F1:帮助 F2:展开 F5:清屏 F6:退出   │
-└─────────────────────────────────────┘
-```
-
-## 快捷键
-
-| 按键 | 功能 |
-|------|------|
-| F1 | 显示帮助 |
-| F2 | 切换侧边栏 |
-| F3 | 工具详情 |
-| F5 | 清屏 |
-| F6 | 退出 |
-
-## 技术栈
-
-| 技术 | 用途 |
-|------|------|
-| Python 3.8+ | 编程语言 |
-| Textual 0.47+ | TUI 框架 |
-| SQLite | 图数据库（默认内嵌） |
-| OpenAI SDK | API 调用（兼容 DeepSeek） |
-| threading.Queue | 多线程通信 |
-| PyInstaller | 打包 |
-
-## 数据库模式
-
-### SQLite 内嵌（默认）
-
-```python
-# core/embedded_db.py
-class EmbeddedGraphDB:
-    def __init__(self, db_path="graph_memory.db"):
-        self.conn = sqlite3.connect(db_path, check_same_thread=False)
-```
-
-### 可选：Neo4j
-
-```bash
-export USE_EMBEDDED_DB=false
-docker run -d --name neo4j -p 7474:7474 -p 7687:7687 neo4j:latest
-```
+---
 
 ## 工具系统
 
@@ -241,4 +162,19 @@ docker run -d --name neo4j -p 7474:7474 -p 7687:7687 neo4j:latest
 - `task_create` - 创建任务
 - `task_set_state` - 设置状态
 - `task_delete` - 删除任务
-- `task_link_info` - 关联信息
\ No newline at end of file
+- `task_link_info` - 关联信息
+
+---
+
+## 错误处理原则
+
+所有 API **不抛出异常**，错误通过返回字典传递：
+
+```python
+result = client.process_message("hello")
+
+if result.get("success"):
+    print(result["content"])
+else:
+    print(result["error"])  # 错误描述
+```
\ No newline at end of file
diff --git a/tests/test_core/test_packet.py b/tests/test_core/test_packet.py
index ad9d0c1..bccd9f2 100644
--- a/tests/test_core/test_packet.py
+++ b/tests/test_core/test_packet.py
@@ -9,304 +9,300 @@ os.environ["DEEPSEEK_API_KEY"] = "fake-test-key"
 
 
 class TestPacketTypeEnum:
-    def test_packet_type_message_exists(self):
+    """测试 PacketType 枚举"""
+    
+    def test_packet_type_process_message_exists(self):
         from core import PacketType
-        assert PacketType.MESSAGE is not None
-        assert PacketType.MESSAGE.value == "message"
+        assert PacketType.PROCESS_MESSAGE is not None
+        assert PacketType.PROCESS_MESSAGE.value == "process_message"
 
-    def test_packet_type_config_exists(self):
+    def test_packet_type_execute_tool_exists(self):
         from core import PacketType
-        assert PacketType.CONFIG is not None
-        assert PacketType.CONFIG.value == "config"
+        assert PacketType.EXECUTE_TOOL is not None
+        assert PacketType.EXECUTE_TOOL.value == "execute_tool"
 
-    def test_packet_type_tool_exists(self):
+    def test_packet_type_get_status_exists(self):
         from core import PacketType
-        assert PacketType.TOOL is not None
-        assert PacketType.TOOL.value == "tool"
+        assert PacketType.GET_STATUS is not None
+        assert PacketType.GET_STATUS.value == "get_status"
 
-    def test_packet_type_status_exists(self):
+    def test_packet_type_get_config_exists(self):
         from core import PacketType
-        assert PacketType.STATUS is not None
-        assert PacketType.STATUS.value == "status"
+        assert PacketType.GET_CONFIG is not None
+        assert PacketType.GET_CONFIG.value == "get_config"
 
-    def test_packet_type_history_exists(self):
+    def test_packet_type_set_config_exists(self):
         from core import PacketType
-        assert PacketType.HISTORY is not None
-        assert PacketType.HISTORY.value == "history"
+        assert PacketType.SET_CONFIG is not None
+        assert PacketType.SET_CONFIG.value == "set_config"
+
+    def test_packet_type_get_history_exists(self):
+        from core import PacketType
+        assert PacketType.GET_HISTORY is not None
+        assert PacketType.GET_HISTORY.value == "get_history"
+
+    def test_packet_type_save_history_exists(self):
+        from core import PacketType
+        assert PacketType.SAVE_HISTORY is not None
+        assert PacketType.SAVE_HISTORY.value == "save_history"
+
+    def test_packet_type_shutdown_exists(self):
+        from core import PacketType
+        assert PacketType.SHUTDOWN is not None
+        assert PacketType.SHUTDOWN.value == "shutdown"
 
     def test_packet_type_all_values(self):
         from core import PacketType
         values = [pt.value for pt in PacketType]
-        assert "message" in values
-        assert "config" in values
-        assert "tool" in values
-        assert "status" in values
-        assert "history" in values
-        assert len(values) == 5
+        assert "process_message" in values
+        assert "execute_tool" in values
+        assert "get_status" in values
+        assert "get_config" in values
+        assert "set_config" in values
+        assert "get_history" in values
+        assert "save_history" in values
+        assert "shutdown" in values
+        assert len(values) == 8
 
 
 class TestPacketCreation:
+    """测试 Packet 创建"""
+    
     def test_packet_with_id_and_type(self):
         from core import Packet, PacketType
-        packet = Packet(id="test-1", type=PacketType.MESSAGE, body={"message": "hello"})
+        packet = Packet(id="test-1", type=PacketType.PROCESS_MESSAGE, body={"user_input": "hello"})
         assert packet.id == "test-1"
-        assert packet.type == PacketType.MESSAGE
+        assert packet.type == PacketType.PROCESS_MESSAGE
 
     def test_packet_body(self):
         from core import Packet, PacketType
-        body = {"message": "test", "extra": "data"}
-        packet = Packet(id="test-2", type=PacketType.CONFIG, body=body)
+        body = {"user_input": "test", "extra": "data"}
+        packet = Packet(id="test-2", type=PacketType.EXECUTE_TOOL, body=body)
         assert packet.body == body
 
+    def test_packet_with_empty_body(self):
+        from core import Packet, PacketType
+        packet = Packet(id="test-3", type=PacketType.GET_STATUS, body={})
+        assert packet.body == {}
+
     def test_packet_created_at_default(self):
         from core import Packet, PacketType
         before = time.time()
-        packet = Packet(id="test-3", type=PacketType.STATUS, body={})
+        packet = Packet(id="test-4", type=PacketType.GET_CONFIG, body={})
         after = time.time()
         assert before <= packet.created_at <= after
 
-    def test_packet_with_custom_created_at(self):
-        from core import Packet, PacketType
-        custom_time = 1234567890.0
-        packet = Packet(id="test-4", type=PacketType.HISTORY, body={}, created_at=custom_time)
-        assert packet.created_at == custom_time
+
+class TestPacketResponse:
+    """测试 PacketResponse"""
+    
+    def test_packet_response_success(self):
+        from core import PacketResponse
+        response = PacketResponse(id="resp-1", success=True, data={"result": "ok"})
+        assert response.id == "resp-1"
+        assert response.success is True
+        assert response.data == {"result": "ok"}
+
+    def test_packet_response_error(self):
+        from core import PacketResponse
+        response = PacketResponse(id="resp-2", success=False, error="error msg")
+        assert response.id == "resp-2"
+        assert response.success is False
+        assert response.error == "error msg"
 
 
-class TestBackendServerInit:
-    def test_create_server_defaults(self):
+class TestBackendServerCreation:
+    """测试 BackendServer 创建"""
+    
+    def test_backend_server_init(self):
+        from core import BackendServer
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        assert server._db_path == ":memory:"
+        assert server._use_embedded_db is True
+        assert server._graph is None
+        assert server._client is None
+        assert server._tool_limiter is None
+
+    def test_backend_server_default_params(self):
         from core import BackendServer
         server = BackendServer()
         assert server._db_path == "graph_memory.db"
         assert server._use_embedded_db is True
-        assert server._graph is None
-        assert server._client is None
+
+
+class TestBackendServerLifecycle:
+    """测试 BackendServer 生命周期"""
+    
+    def test_backend_server_start_stop(self):
+        from core import BackendServer
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        server.start(api_key="")
+        
+        assert server._running is True
+        assert server._graph is not None
+        assert server._tool_limiter is not None
+        
+        server.shutdown()
         assert server._running is False
 
-    def test_create_server_custom_db(self):
+    def test_backend_server_start_with_api_key(self):
         from core import BackendServer
-        server = BackendServer(db_path="custom.db")
-        assert server._db_path == "custom.db"
-
-    def test_create_server_no_embedded(self):
-        from core import BackendServer
-        server = BackendServer(use_embedded_db=False)
-        assert server._use_embedded_db is False
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        server.start(api_key="test-key", base_url="https://api.deepseek.com")
+        
+        assert server._client is not None
+        assert server._config["api_key"] == "test-key"
+        
+        server.shutdown()
 
 
-class TestBackendServerStart:
-    def test_start_without_api_key(self):
-        from core import BackendServer
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            assert server._running is True
-            assert server._graph is not None
-            assert server._client is None
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-    def test_start_with_api_key(self):
-        from core import BackendServer
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="test-key", base_url="https://api.test.com")
-            assert server._running is True
-            assert server._config["api_key"] == "test-key"
-            assert server._config["base_url"] == "https://api.test.com"
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-    def test_start_twice_returns_early(self):
-        from core import BackendServer
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path)
-            server.start(api_key="")
-            running_before = server._running
-            server.start(api_key="")
-            running_after = server._running
-            assert running_before is True
-            assert running_after is True
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-
-class TestBackendServerShutdown:
-    def test_shutdown_stops_server(self):
-        from core import BackendServer
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path)
-            server.start(api_key="")
-            assert server._running is True
-            server.shutdown()
-            assert server._running is False
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-    def test_shutdown_closes_graph(self):
-        from core import BackendServer
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path)
-            server.start(api_key="")
-            server.shutdown()
-            assert server._graph is None
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-
-class TestBackendServerPacketHandling:
-    def test_send_message_without_client(self):
-        from core import BackendServer, Packet, PacketType
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path)
-            server.start(api_key="")
-            packet = Packet(id="1", type=PacketType.MESSAGE, body={"message": "hello"})
-            response = server.send(packet)
-            assert response.body["success"] is True
-            assert "API Key not configured" in response.body["error"]
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-    def test_send_status_packet(self):
-        from core import BackendServer, Packet, PacketType
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path)
-            server.start(api_key="")
-            packet = Packet(id="2", type=PacketType.STATUS, body={})
-            response = server.send(packet)
-            assert response.body["success"] is True
-            assert response.body["running"] is True
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-
-class TestBackendClientInit:
-    def test_create_client_with_server(self):
+class TestBackendClientCreation:
+    """测试 BackendClient 创建"""
+    
+    def test_backend_client_init(self):
         from core import BackendServer, BackendClient
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            client = BackendClient(server)
-            assert client._server is server
-            assert client._counter == 0
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        client = BackendClient(server)
+        
+        assert client._server is server
+        assert client._counter == 0
 
 
-class TestBackendClientMethods:
+class TestBackendClientAPI:
+    """测试 BackendClient API"""
+    
     def test_get_status(self):
         from core import BackendServer, BackendClient
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            client = BackendClient(server)
-            status = client.get_status()
-            assert status["success"] is True
-            assert status["running"] is True
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        server.start(api_key="")
+        client = BackendClient(server)
+        
+        result = client.get_status()
+        assert result.get("success") is True
+        data = result.get("data", {})
+        assert data.get("running") is True
+        
+        server.shutdown()
 
     def test_update_config(self):
         from core import BackendServer, BackendClient
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            client = BackendClient(server)
-            result = client.update_config(api_key="new-key", base_url="https://new-api.test.com")
-            assert result["success"] is True
-            assert result["status"] == "config_updated"
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        server.start(api_key="")
+        client = BackendClient(server)
+        
+        result = client.update_config(api_key="new-key", base_url="https://api.deepseek.com")
+        assert result.get("success") is True
+        
+        server.shutdown()
 
-    def test_save_and_get_history(self):
+    def test_get_config(self):
         from core import BackendServer, BackendClient
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            client = BackendClient(server)
-            
-            test_messages = [{"role": "user", "content": "hello"}]
-            client.save_history(test_messages)
-            
-            history = client.get_history()
-            assert history == test_messages
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        server.start(api_key="test-key")
+        client = BackendClient(server)
+        
+        result = client.get_config()
+        assert result.get("success") is True
+        assert result.get("data", {}).get("api_key") == "test-key"
+        
+        server.shutdown()
 
-
-class TestMultipleClients:
-    def test_multiple_clients_thread_safety(self):
+    def test_process_message_no_api_key(self):
         from core import BackendServer, BackendClient
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            client = BackendClient(server)
-            
-            status1 = client.get_status()
-            status2 = client.get_status()
-            
-            assert status1["success"] is True
-            assert status2["success"] is True
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        server.start(api_key="")
+        client = BackendClient(server)
+        
+        # 无 API key 应该返回错误（success 为 False）
+        result = client.process_message("hello")
+        # 由于 API 调用失败，success 应该是 False
+        assert result.get("success") is False
+        
+        server.shutdown()
+
+    def test_execute_tool(self):
+        from core import BackendServer, BackendClient
+        server = BackendServer(db_path=":memory:", use_embedded_db=True)
+        server.start(api_key="")
+        client = BackendClient(server)
+        
+        result = client.execute_tool("memory_introspect", {})
+        assert result.get("success") is True
+        
+        server.shutdown()
 
 
-class TestServerStateAfterShutdown:
-    def test_server_state_not_running(self):
-        from core import BackendServer
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path)
-            server.start(api_key="")
-            assert server._running is True
-            server.shutdown()
-            assert server._running is False
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
\ No newline at end of file
+class TestToolLimiter:
+    """测试工具限制器"""
+    
+    def test_tool_limiter_init(self):
+        from core.tool_limiter import ToolLimiter
+        limiter = ToolLimiter()
+        assert limiter.counts.persona_query == 0
+        assert limiter.counts.persona_update == 0
+
+    def test_tool_limiter_classify(self):
+        from core.tool_limiter import ToolLimiter
+        limiter = ToolLimiter()
+        
+        category, operation = limiter._classify_tool("memory_recall", {"query_intent": "test"})
+        assert category == "memory"
+        assert operation == "query"
+        
+        category, operation = limiter._classify_tool("persona_update", {})
+        assert category == "persona"
+        assert operation == "update"
+        
+        category, operation = limiter._classify_tool("task_create", {})
+        assert category == "task"
+        assert operation == "update"
+
+    def test_tool_limiter_can_call(self):
+        from core.tool_limiter import ToolLimiter
+        limiter = ToolLimiter()
+        
+        allowed, reason = limiter.can_call("persona_update", {})
+        assert allowed is True
+        
+        limiter.record_call("persona_update", {})
+        allowed, reason = limiter.can_call("persona_update", {})
+        assert allowed is False
+        assert "已达上限" in reason
+
+    def test_tool_limiter_reset(self):
+        from core.tool_limiter import ToolLimiter
+        limiter = ToolLimiter()
+        
+        limiter.record_call("persona_update", {})
+        assert limiter.counts.persona_update == 1
+        
+        limiter.reset()
+        assert limiter.counts.persona_update == 0
+
+
+class TestEmbeddedGraphDB:
+    """测试图数据库"""
+    
+    def test_embedded_db_init(self):
+        from core.embedded_db import EmbeddedGraphDB
+        db = EmbeddedGraphDB(db_path=":memory:")
+        assert db.conn is not None
+        db.close()
+
+    def test_embedded_db_commit_and_recall(self):
+        from core.embedded_db import EmbeddedGraphDB
+        db = EmbeddedGraphDB(db_path=":memory:")
+        
+        # 写入记忆 (使用 triplets 参数)
+        result = db.commit(
+            triplets=[
+                {"subject": "测试", "relation": "是", "object": "test"}
+            ],
+            session_id="test-session"
+        )
+        
+        # 读取记忆
+        results = db.recall("测试")
+        assert len(results.get("entities", [])) > 0
+        
+        db.close()
\ No newline at end of file
diff --git a/tests/test_integration/__init__.py b/tests/test_integration/__init__.py
index e817fd1..e70b2ef 100644
--- a/tests/test_integration/__init__.py
+++ b/tests/test_integration/__init__.py
@@ -6,8 +6,10 @@ os.environ["DEEPSEEK_API_KEY"] = "fake-test-key"
 
 
 class TestIntegrationPacketFlow:
-    def test_packet_round_trip_message(self):
-        from core import BackendServer, BackendClient, Packet, PacketType
+    """测试 Packet 通信流程"""
+    
+    def test_packet_round_trip_process_message(self):
+        from core import BackendServer, BackendClient
         with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
             db_path = f.name
         try:
@@ -15,9 +17,10 @@ class TestIntegrationPacketFlow:
             server.start(api_key="")
             client = BackendClient(server)
             
-            result = client.send_message("test message")
-            assert result["success"] is True
-            assert "API Key not configured" in result.get("error", "")
+            # 无 API key 时应该返回错误而非抛异常
+            result = client.process_message("test message")
+            assert result.get("success") is False
+            assert "error" in result
             
             server.shutdown()
         finally:
@@ -34,12 +37,12 @@ class TestIntegrationPacketFlow:
             client = BackendClient(server)
             
             result = client.update_config(api_key="test-api", base_url="https://test.com")
-            assert result["success"] is True
-            assert result["status"] == "config_updated"
+            assert result.get("success") is True
             
             status = client.get_status()
-            assert status["config"]["api_key"] == "test-api"
-            assert status["config"]["base_url"] == "https://test.com"
+            data = status.get("data", {})
+            assert data.get("config", {}).get("api_key") == "test-api"
+            assert data.get("config", {}).get("base_url") == "https://test.com"
             
             server.shutdown()
         finally:
@@ -55,17 +58,18 @@ class TestIntegrationPacketFlow:
             server.start(api_key="")
             client = BackendClient(server)
             
-            status = client.get_status()
-            assert status["success"] is True
-            assert status["running"] is True
-            assert status["client_ready"] is False
+            result = client.get_status()
+            assert result.get("success") is True
+            data = result.get("data", {})
+            assert data.get("running") is True
+            assert data.get("graph_initialized") is True
             
             server.shutdown()
         finally:
             if os.path.exists(db_path):
                 os.unlink(db_path)
 
-    def test_packet_round_trip_history(self):
+    def test_packet_round_trip_execute_tool(self):
         from core import BackendServer, BackendClient
         with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
             db_path = f.name
@@ -74,14 +78,8 @@ class TestIntegrationPacketFlow:
             server.start(api_key="")
             client = BackendClient(server)
             
-            messages = [
-                {"role": "user", "content": "hello"},
-                {"role": "assistant", "content": "hi there"}
-            ]
-            client.save_history(messages)
-            
-            retrieved = client.get_history()
-            assert retrieved == messages
+            result = client.execute_tool("memory_introspect", {})
+            assert result.get("success") is True
             
             server.shutdown()
         finally:
@@ -89,8 +87,10 @@ class TestIntegrationPacketFlow:
                 os.unlink(db_path)
 
 
-class TestIntegrationSequentialOperations:
-    def test_sequential_config_updates(self):
+class TestIntegrationToolLimiter:
+    """测试工具限制器集成"""
+    
+    def test_external_tool_call_not_limited(self):
         from core import BackendServer, BackendClient
         with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
             db_path = f.name
@@ -99,36 +99,38 @@ class TestIntegrationSequentialOperations:
             server.start(api_key="")
             client = BackendClient(server)
             
-            client.update_config(api_key="key1", base_url="https://api1.com")
-            status1 = client.get_status()
-            assert status1["config"]["api_key"] == "key1"
-            
-            client.update_config(api_key="key2", base_url="https://api2.com")
-            status2 = client.get_status()
-            assert status2["config"]["api_key"] == "key2"
+            # 外部调用多次应该成功
+            for i in range(5):
+                result = client.execute_tool("memory_introspect", {})
+                assert result.get("success") is True
             
             server.shutdown()
         finally:
             if os.path.exists(db_path):
                 os.unlink(db_path)
 
-    def test_save_history_override(self):
+    def test_internal_tool_call_limited(self):
         from core import BackendServer, BackendClient
         with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
             db_path = f.name
         try:
             server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
+            server.start(api_key="fake-key")  # 假 key 会失败但不影响测试
             client = BackendClient(server)
             
-            client.save_history([{"role": "user", "content": "first"}])
-            history1 = client.get_history()
-            assert len(history1) == 1
+            # 内部调用受限，tool_limiter 存在
+            assert server._tool_limiter is not None
             
-            client.save_history([{"role": "user", "content": "second"}])
-            history2 = client.get_history()
-            assert len(history2) == 1
-            assert history2[0]["content"] == "second"
+            # 初始状态
+            assert server._tool_limiter.counts.persona_update == 0
+            
+            # 记录一次调用
+            server._tool_limiter.record_call("persona_update", {})
+            assert server._tool_limiter.counts.persona_update == 1
+            
+            # 再次调用应该被拒绝
+            allowed, reason = server._tool_limiter.can_call("persona_update", {})
+            assert allowed is False
             
             server.shutdown()
         finally:
@@ -136,117 +138,10 @@ class TestIntegrationSequentialOperations:
                 os.unlink(db_path)
 
 
-class TestIntegrationMultipleClients:
-    def test_two_clients_same_server(self):
-        from core import BackendServer, BackendClient
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            
-            client1 = BackendClient(server)
-            client2 = BackendClient(server)
-            
-            status1 = client1.get_status()
-            status2 = client2.get_status()
-            
-            assert status1["success"] is True
-            assert status2["success"] is True
-            
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-
-class TestIntegrationDatabase:
-    def test_server_creates_database(self):
-        from core import BackendServer
-        with tempfile.TemporaryDirectory() as tmpdir:
-            db_path = os.path.join(tmpdir, "test.db")
-            server = BackendServer(db_path=db_path, use_embedded_db=True)
-            server.start(api_key="")
-            
-            assert os.path.exists(db_path)
-            
-            server.shutdown()
-            assert os.path.exists(db_path)
-
-    def test_server_persists_across_restart(self):
-        from core import BackendServer, BackendClient
-        with tempfile.TemporaryDirectory() as tmpdir:
-            db_path = os.path.join(tmpdir, "persist.db")
-            
-            server1 = BackendServer(db_path=db_path, use_embedded_db=True)
-            server1.start(api_key="")
-            server1.shutdown()
-            
-            server2 = BackendServer(db_path=db_path, use_embedded_db=True)
-            server2.start(api_key="")
-            assert os.path.exists(db_path)
-            server2.shutdown()
-
-
-class TestIntegrationEntryPoint:
-    def test_entry_import(self):
-        import trulymem_entry
-        assert trulymem_entry is not None
-
-    def test_entry_has_main(self):
-        import trulymem_entry
-        assert hasattr(trulymem_entry, 'main')
-        assert callable(trulymem_entry.main)
-
-
-class TestIntegrationAllPacketTypes:
-    def test_message_type_string(self):
-        from core import PacketType
-        assert PacketType.MESSAGE.value == "message"
-
-    def test_config_type_string(self):
-        from core import PacketType
-        assert PacketType.CONFIG.value == "config"
-
-    def test_tool_type_string(self):
-        from core import PacketType
-        assert PacketType.TOOL.value == "tool"
-
-    def test_status_type_string(self):
-        from core import PacketType
-        assert PacketType.STATUS.value == "status"
-
-    def test_history_type_string(self):
-        from core import PacketType
-        assert PacketType.HISTORY.value == "history"
-
-
 class TestIntegrationErrorHandling:
-    def test_timeout_on_slow_response(self):
-        from core import BackendServer, Packet, PacketType
-        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
-            db_path = f.name
-        try:
-            server = BackendServer(db_path=db_path)
-            server.start(api_key="")
-            server._running = False
-            
-            packet = Packet(id="timeout-test", type=PacketType.MESSAGE, body={"message": "test"})
-            
-            original_timeout = 30.0
-            server.send = lambda p, timeout=original_timeout: (
-                setattr(server, '_running', True),
-                server.send(p)
-            )[1]
-            
-            server.shutdown()
-        finally:
-            if os.path.exists(db_path):
-                os.unlink(db_path)
-
-
-class TestIntegrationFullWorkflow:
-    def test_complete_workflow(self):
+    """测试错误处理"""
+    
+    def test_process_message_returns_error_not_raise(self):
         from core import BackendServer, BackendClient
         with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
             db_path = f.name
@@ -255,24 +150,30 @@ class TestIntegrationFullWorkflow:
             server.start(api_key="")
             client = BackendClient(server)
             
-            status_before = client.get_status()
-            assert status_before["success"] is True
-            
-            client.update_config(api_key="workflow-key", base_url="https://workflow.com")
-            status_after_config = client.get_status()
-            assert status_after_config["config"]["api_key"] == "workflow-key"
-            
-            history = [{"role": "user", "content": "test workflow"}]
-            client.save_history(history)
-            retrieved_history = client.get_history()
-            assert retrieved_history == history
-            
-            message_result = client.send_message("test")
-            assert message_result["success"] is True
+            # 应该返回错误，而不是抛出异常
+            result = client.process_message("hello")
+            assert result.get("success") is False
+            assert "error" in result
+            
+            server.shutdown()
+        finally:
+            if os.path.exists(db_path):
+                os.unlink(db_path)
+
+    def test_execute_tool_error_handling(self):
+        from core import BackendServer, BackendClient
+        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
+            db_path = f.name
+        try:
+            server = BackendServer(db_path=db_path, use_embedded_db=True)
+            server.start(api_key="")
+            client = BackendClient(server)
+            
+            # 不存在的工具应该返回错误
+            result = client.execute_tool("nonexistent_tool", {})
+            assert result.get("success") is False
             
             server.shutdown()
-            status_after_shutdown = client.get_status()
-            assert status_after_shutdown["running"] is False
         finally:
             if os.path.exists(db_path):
                 os.unlink(db_path)
\ No newline at end of file
diff --git a/tests/test_ui/__init__.py b/tests/test_ui/__init__.py
index 2097c4d..6497e77 100644
--- a/tests/test_ui/__init__.py
+++ b/tests/test_ui/__init__.py
@@ -6,7 +6,9 @@ from pathlib import Path
 os.environ["DEEPSEEK_API_KEY"] = "fake-test-key"
 
 
-class TestUIImportFull:
+class TestUIImport:
+    """测试 UI 模块导入"""
+    
     def test_import_graphmemoryapp(self):
         from ui import GraphMemoryApp
         assert GraphMemoryApp is not None
@@ -15,52 +17,24 @@ class TestUIImportFull:
         from ui import AppConfig
         assert AppConfig is not None
 
-    def test_import_from_models(self):
+    def test_import_message(self):
         from ui.models.message import Message, ToolCall, ToolResult
         assert Message is not None
         assert ToolCall is not None
         assert ToolResult is not None
 
-    def test_import_from_models_config(self):
+    def test_import_config(self):
         from ui.models.config import AppConfig
         assert AppConfig is not None
 
-    def test_import_from_models_log_entry(self):
+    def test_import_log_entry(self):
         from ui.models.log_entry import LogEntry
         assert LogEntry is not None
 
-    def test_import_from_widgets(self):
-        from ui.widgets.left_panel import LeftPanel
-        from ui.widgets.right_panel import RightPanel
-        from ui.widgets.input_box import InputBox
-        from ui.widgets.message_history import MessageHistory
-        from ui.widgets.status_bar import StatusBar
-        assert LeftPanel is not None
-        assert RightPanel is not None
-        assert InputBox is not None
-        assert MessageHistory is not None
-        assert StatusBar is not None
 
-    def test_import_from_handlers(self):
-        from ui.handlers.focus_handler import FocusHandler
-        from ui.handlers.key_handler import KeyHandler
-        from ui.handlers.message_handler import MessageHandler
-        assert FocusHandler is not None
-        assert KeyHandler is not None
-        assert MessageHandler is not None
-
-    def test_import_from_services(self):
-        from ui.services.config_manager import ConfigManager
-        from ui.services.config_service import ConfigService
-        from ui.services.chat_service import ChatService
-        from ui.services.tool_service import ToolService
-        assert ConfigManager is not None
-        assert ConfigService is not None
-        assert ChatService is not None
-        assert ToolService is not None
-
-
-class TestAppConfigFull:
+class TestAppConfig:
+    """测试配置模型"""
+    
     def test_config_default_values(self):
         from ui.models.config import AppConfig
         config = AppConfig()
@@ -68,25 +42,15 @@ class TestAppConfigFull:
         assert config.model == "deepseek-chat"
         assert config.base_url == "https://api.deepseek.com"
 
-    def test_config_from_env_with_key(self):
+    def test_config_from_env(self):
         from ui.models.config import AppConfig
         config = AppConfig.from_env()
         assert "fake-test-key" in config.api_key
 
-    def test_config_from_env_custom(self):
-        os.environ["DEEPSEEK_API_KEY"] = "my-key"
-        os.environ["MODEL_NAME"] = "my-model"
-        os.environ["DEEPSEEK_BASE_URL"] = "https://my-api.com"
-        
-        from ui.models.config import AppConfig
-        config = AppConfig.from_env()
-        
-        assert config.api_key == "my-key"
-        assert config.model == "my-model"
-        assert config.base_url == "https://my-api.com"
 
-
-class TestMessageModelFull:
+class TestMessageModel:
+    """测试消息模型"""
+    
     def test_message_creation_user(self):
         from ui.models.message import Message
         from datetime import datetime
@@ -99,119 +63,36 @@ class TestMessageModelFull:
         from ui.models.message import Message
         msg = Message(role="assistant", content="assistant response")
         assert msg.role == "assistant"
-        assert msg.content == "assistant response"
 
     def test_message_with_tool_calls(self):
         from ui.models.message import Message, ToolCall
         tc = ToolCall(id="call-1", name="memory_recall", arguments={"query": "test"})
         msg = Message(role="assistant", content="response", tool_calls=[tc])
-        assert msg.role == "assistant"
         assert msg.tool_calls is not None
         assert len(msg.tool_calls) == 1
-        assert msg.tool_calls[0].name == "memory_recall"
-
-    def test_message_with_tool_results(self):
-        from ui.models.message import Message, ToolResult
-        tr = ToolResult(tool_call_id="call-1", name="memory_recall", arguments={}, result="result", success=True)
-        msg = Message(role="assistant", content="response", tool_results=[tr])
-        assert msg.tool_results is not None
-        assert len(msg.tool_results) == 1
-        assert msg.tool_results[0].success is True
 
 
-class TestToolCallModelFull:
-    def test_toolcall_creation(self):
-        from ui.models.message import ToolCall
-        tc = ToolCall(id="call-1", name="memory_recall", arguments={"query": "test"})
-        assert tc.id == "call-1"
-        assert tc.name == "memory_recall"
-        assert tc.arguments["query"] == "test"
-
-
-class TestToolResultModelFull:
-    def test_toolresult_creation_success(self):
-        from ui.models.message import ToolResult
-        tr = ToolResult(tool_call_id="call-1", name="memory_recall", arguments={}, result="success result", success=True)
-        assert tr.tool_call_id == "call-1"
-        assert tr.name == "memory_recall"
-        assert tr.success is True
-        assert tr.result == "success result"
-
-    def test_toolresult_creation_failure(self):
-        from ui.models.message import ToolResult
-        tr = ToolResult(tool_call_id="call-1", name="memory_recall", arguments={}, result="error", success=False)
-        assert tr.success is False
-        assert tr.result == "error"
-
-
-class TestLogEntryModelFull:
-    def test_logentry_creation(self):
-        from ui.models.log_entry import LogEntry
-        from datetime import datetime
-        entry = LogEntry(
-            timestamp=datetime.now(),
-            tool_name="memory_recall",
-            arguments={"query": "test"},
-            result="result",
-            duration=0.5
-        )
-        assert entry.tool_name == "memory_recall"
-        assert entry.duration == 0.5
-
-    def test_logentry_args_summary(self):
-        from ui.models.log_entry import LogEntry
-        from datetime import datetime
-        entry = LogEntry(
-            timestamp=datetime.now(),
-            tool_name="memory_recall",
-            arguments={"query": "test query with many characters"},
-            result="result",
-            duration=0.5
-        )
-        summary = entry.args_summary
-        assert isinstance(summary, str)
-        assert "query" in summary
-
-    def test_logentry_result_summary(self):
-        from ui.models.log_entry import LogEntry
-        from datetime import datetime
-        entry = LogEntry(
-            timestamp=datetime.now(),
-            tool_name="memory_recall",
-            arguments={},
-            result="a" * 200,
-            duration=0.5
-        )
-        summary = entry.result_summary
-        assert len(summary) <= 103
-
-
-class TestAppCSSPathFull:
+class TestAppCSSPath:
+    """测试 App CSS 配置"""
+    
     def test_app_has_css_path(self):
         from ui import GraphMemoryApp
         assert hasattr(GraphMemoryApp, 'CSS_PATH')
         assert len(GraphMemoryApp.CSS_PATH) > 0
 
-    def test_css_path_are_paths(self):
-        from ui import GraphMemoryApp
-        for path in GraphMemoryApp.CSS_PATH:
-            assert isinstance(path, Path)
 
-
-class TestAppBindingsFull:
+class TestAppBindings:
+    """测试 App 快捷键"""
+    
     def test_app_has_bindings(self):
         from ui import GraphMemoryApp
         assert hasattr(GraphMemoryApp, 'BINDINGS')
         assert len(GraphMemoryApp.BINDINGS) > 0
 
-    def test_bindings_have_required_keys(self):
-        from ui import GraphMemoryApp
-        for binding in GraphMemoryApp.BINDINGS:
-            assert hasattr(binding, 'key')
-            assert hasattr(binding, 'action')
 
-
-class TestWidgetImportsFull:
+class TestWidgetImports:
+    """测试组件导入"""
+    
     def test_import_left_panel(self):
         from ui.widgets.left_panel import LeftPanel
         assert LeftPanel is not None
@@ -228,28 +109,14 @@ class TestWidgetImportsFull:
         from ui.widgets.message_history import MessageHistory
         assert MessageHistory is not None
 
-    def test_import_message_widget(self):
-        from ui.widgets.message_widget import MessageWidget
-        assert MessageWidget is not None
-
     def test_import_status_bar(self):
         from ui.widgets.status_bar import StatusBar
         assert StatusBar is not None
 
-    def test_import_config_section(self):
-        from ui.widgets.config_section import ConfigSection
-        assert ConfigSection is not None
 
-    def test_import_operation_log(self):
-        from ui.widgets.operation_log import OperationLog
-        assert OperationLog is not None
-
-    def test_import_cypher_query_box(self):
-        from ui.widgets.cypher_query_box import CypherQueryBox
-        assert CypherQueryBox is not None
-
-
-class TestHandlerImportsFull:
+class TestHandlerImports:
+    """测试处理器导入"""
+    
     def test_import_focus_handler(self):
         from ui.handlers.focus_handler import FocusHandler
         assert FocusHandler is not None
@@ -258,30 +125,22 @@ class TestHandlerImportsFull:
         from ui.handlers.key_handler import KeyHandler
         assert KeyHandler is not None
 
-    def test_import_message_handler(self):
-        from ui.handlers.message_handler import MessageHandler
-        assert MessageHandler is not None
-
-
-class TestServiceImportsFull:
-    def test_import_config_manager(self):
-        from ui.services.config_manager import ConfigManager
-        assert ConfigManager is not None
 
+class TestServiceImports:
+    """测试服务导入"""
+    
     def test_import_config_service(self):
         from ui.services.config_service import ConfigService
         assert ConfigService is not None
 
-    def test_import_chat_service(self):
-        from ui.services.chat_service import ChatService
-        assert ChatService is not None
-
-    def test_import_tool_service(self):
-        from ui.services.tool_service import ToolService
-        assert ToolService is not None
+    def test_import_config_manager(self):
+        from ui.services.config_manager import ConfigManager
+        assert ConfigManager is not None
 
 
-class TestAppInitializationFull:
+class TestAppInitialization:
+    """测试 App 初始化"""
+    
     def test_app_without_backend(self):
         from ui import GraphMemoryApp
         app = GraphMemoryApp()
@@ -305,18 +164,56 @@ class TestAppInitializationFull:
                 os.unlink(db_path)
 
 
-class TestConfigManagerFull:
-    def test_config_manager_creation(self):
-        from ui.services.config_manager import ConfigManager
-        cm = ConfigManager()
-        assert cm is not None
+class TestUIWithBackendClient:
+    """测试 UI 与后端通信"""
+    
+    def test_app_sends_message_via_backend_client(self):
+        from ui import GraphMemoryApp
+        from core import BackendServer, BackendClient
+        
+        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
+            db_path = f.name
+        try:
+            server = BackendServer(db_path=db_path)
+            server.start(api_key="")
+            
+            app = GraphMemoryApp(backend_server=server)
+            client = app._backend_client
+            
+            # 测试 get_status
+            status = client.get_status()
+            assert status.get("success") is True
+            
+            # 测试 update_config
+            result = client.update_config(api_key="sk-test", base_url="https://api.deepseek.com")
+            assert result.get("success") is True
+            
+            server.shutdown()
+        finally:
+            if os.path.exists(db_path):
+                os.unlink(db_path)
 
-    def test_config_manager_config_path(self):
-        from ui.services.config_manager import ConfigManager
-        cm = ConfigManager()
-        assert cm._config_path is not None
-
-    def test_config_manager_exists_false(self):
-        from ui.services.config_manager import ConfigManager
-        cm = ConfigManager()
-        assert cm.exists() is False
\ No newline at end of file
+    def test_ui_only_uses_backend_client(self):
+        from ui import GraphMemoryApp
+        from core import BackendServer
+        
+        with tempfile.NamedTemporaryFile(suffix=".db", delete=False) as f:
+            db_path = f.name
+        try:
+            server = BackendServer(db_path=db_path)
+            server.start(api_key="")
+            
+            app = GraphMemoryApp(backend_server=server)
+            
+            # UI 不应该直接访问后端内部
+            assert hasattr(app, '_backend_client')
+            assert app._backend_client is not None
+            
+            # 不应该有 _graph, _client 等直接访问
+            assert not hasattr(app, '_graph')
+            assert not hasattr(app, '_client')
+            
+            server.shutdown()
+        finally:
+            if os.path.exists(db_path):
+                os.unlink(db_path)
\ No newline at end of file
diff --git a/trulymem_entry.py b/trulymem_entry.py
index c121eba..d856a07 100644
--- a/trulymem_entry.py
+++ b/trulymem_entry.py
@@ -1,33 +1,43 @@
 #!/usr/bin/env python3
 import sys
+import os
 from pathlib import Path
 
-if getattr(sys, 'frozen', False):
-    application_path = Path(sys.executable).parent
-else:
-    application_path = Path(__file__).parent
+# 用户配置文件始终放在用户目录
+CONFIG_PATH = Path.home() / ".trulymem" / "config.json"
+DB_PATH = Path.home() / ".trulymem" / "graph_memory.db"
 
-sys.path.insert(0, str(application_path))
-import os
-os.chdir(application_path)
+# 源码运行时使用项目目录，打包后使用用户目录
+if getattr(sys, 'frozen', False):
+    # 打包版本：创建用户目录
+    CONFIG_PATH.parent.mkdir(parents=True, exist_ok=True)
+else:
+    # 源码版本：检查项目目录是否有配置（向后兼容）
+    project_dir = Path(__file__).parent
+    project_config = project_dir / "config.json"
+    project_db = project_dir / "graph_memory.db"
+    
+    if project_config.exists():
+        CONFIG_PATH = project_config
+    if project_db.exists():
+        DB_PATH = project_db
+
+sys.path.insert(0, str(Path(__file__).parent))
+os.chdir(Path(__file__).parent)
 
 from core import BackendServer
 from ui import GraphMemoryApp
-from ui.services.config_service import ConfigService
 
 
 def main():
-    # 配置文件保存在应用根目录（exe同级目录或源码根目录）
-    config_file = application_path / "config.json"
+    backend_server = BackendServer(
+        db_path=str(DB_PATH),
+        use_embedded_db=True,
+        config_file=str(CONFIG_PATH)
+    )
+    backend_server.start()
     
-    # 加载配置
-    config_service = ConfigService(config_file=config_file)
-    config = config_service.get_config()
-    
-    backend_server = BackendServer(db_path="graph_memory.db", use_embedded_db=True)
-    backend_server.start(api_key=config.api_key, base_url=config.base_url)
-    
-    app = GraphMemoryApp(backend_server=backend_server, config_service=config_service)
+    app = GraphMemoryApp(backend_server=backend_server, config_file=str(CONFIG_PATH))
     
     try:
         app.run()
diff --git a/ui/app.py b/ui/app.py
index 2cd4a0f..2dbfc9f 100644
--- a/ui/app.py
+++ b/ui/app.py
@@ -5,7 +5,6 @@ from textual.binding import Binding
 
 from core import BackendServer, BackendClient
 from .models.message import Message
-from .services.config_service import ConfigService
 
 
 class GraphMemoryApp(App):
@@ -23,11 +22,10 @@ class GraphMemoryApp(App):
         Binding("f6", "quit", "退出"),
     ]
 
-    def __init__(self, backend_server: BackendServer = None, config_service: ConfigService = None, **kwargs):
+    def __init__(self, backend_server: BackendServer = None, config_file: str = None, **kwargs):
         super().__init__(**kwargs)
         self._backend_server = backend_server
         self._backend_client = BackendClient(backend_server) if backend_server else None
-        self._config_service = config_service
         self._api_configured = False
 
     def compose(self) -> ComposeResult:
@@ -36,8 +34,16 @@ class GraphMemoryApp(App):
         from .widgets.status_bar import StatusBar
         from .models.config import AppConfig
         
-        # 获取初始配置
-        initial_config = self._config_service.get_config() if self._config_service else AppConfig()
+        if self._backend_client:
+            result = self._backend_client.get_config()
+            config_data = result.get("data", {})
+            initial_config = AppConfig(
+                api_key=config_data.get("api_key", ""),
+                base_url=config_data.get("base_url", "https://api.deepseek.com"),
+                model=config_data.get("model", "deepseek-chat")
+            )
+        else:
+            initial_config = AppConfig()
         
         yield LeftPanel()
         yield RightPanel(config=initial_config)
@@ -56,7 +62,8 @@ class GraphMemoryApp(App):
             return
         
         status = self._backend_client.get_status()
-        self._api_configured = status.get("config", {}).get("api_key", "") != ""
+        data = status.get("data", {})
+        self._api_configured = data.get("config", {}).get("api_key", "") != ""
         status_bar.set_api_status(self._api_configured)
         
         from .widgets.message_history import MessageHistory
@@ -118,24 +125,19 @@ class GraphMemoryApp(App):
         history = self.query_one(MessageHistory)
         status_bar = self.query_one(StatusBar)
         
-        try:
-            result = await asyncio.get_event_loop().run_in_executor(
-                None,
-                lambda: self._backend_client.send_message(user_input)
-            )
-            
-            # 更新"处理中"消息为实际回复
-            if result.get("success"):
-                content = result.get("content", "(无回复)")
-                history.update_latest_message(content)
-            else:
-                error = result.get("error", "未知错误")
-                history.update_latest_message(f"❌ 错误: {error}")
-                
-        except Exception as e:
-            history.update_latest_message(f"❌ 异常: {str(e)}")
-        finally:
-            status_bar.set_processing(False)
+        result = await asyncio.get_event_loop().run_in_executor(
+            None,
+            lambda: self._backend_client.process_message(user_input)
+        )
+        
+        if result.get("success"):
+            content = result.get("content", "(无回复)")
+            history.update_latest_message(content)
+        else:
+            error = result.get("error", "未知错误")
+            history.update_latest_message(f"❌ 错误: {error}")
+        
+        status_bar.set_processing(False)
 
     def on_config_section_config_changed(self, event) -> None:
         """处理配置变更事件"""
@@ -151,24 +153,41 @@ class GraphMemoryApp(App):
     async def _update_config_async(self, config) -> None:
         """异步更新配置"""
         from .widgets.status_bar import StatusBar
+        from .widgets.config_section import ConfigSection
+        
         status_bar = self.query_one(StatusBar)
         
         api_key = config.api_key
         base_url = config.base_url
+        model = getattr(config, 'model', 'deepseek-chat')
         
         try:
             result = await asyncio.get_event_loop().run_in_executor(
                 None,
-                lambda: self._backend_client.update_config(api_key=api_key, base_url=base_url)
+                lambda: self._backend_client.update_config(api_key=api_key, base_url=base_url, model=model)
             )
             
             if result.get("success"):
                 self._api_configured = bool(api_key)
                 status_bar.set_api_status(self._api_configured)
                 
-                # 保存配置到文件（使用完整的config对象，保留model字段）
-                if self._config_service:
-                    self._config_service.set_config(config)
+                # 从后端重新获取配置并刷新 UI
+                config_result = await asyncio.get_event_loop().run_in_executor(
+                    None,
+                    lambda: self._backend_client.get_config()
+                )
+                config_data = config_result.get("data", {})
+                
+                # 刷新输入框
+                try:
+                    config_section = self.query_one(ConfigSection)
+                    config_section.set_config(AppConfig(
+                        api_key=config_data.get("api_key", ""),
+                        base_url=config_data.get("base_url", "https://api.deepseek.com"),
+                        model=config_data.get("model", "deepseek-chat")
+                    ))
+                except Exception:
+                    pass
                 
                 self.notify("✅ 配置已保存并生效", title="配置成功", severity="information")
             else:
diff --git a/ui/handlers/message_handler.py b/ui/handlers/message_handler.py
deleted file mode 100644
index eeec026..0000000
--- a/ui/handlers/message_handler.py
+++ /dev/null
@@ -1,98 +0,0 @@
-"""消息处理器"""
-
-from datetime import datetime
-from typing import TYPE_CHECKING
-from ..models.message import Message, ToolCall, ToolResult
-
-if TYPE_CHECKING:
-    from ..services.chat_service import ChatService
-    from ..widgets.message_history import MessageHistory
-    from ..widgets.operation_log import OperationLog
-
-
-class MessageHandler:
-    """消息处理器"""
-
-    def __init__(
-        self,
-        chat_service: "ChatService",
-        message_history: "MessageHistory",
-        operation_log: "OperationLog"
-    ):
-        self._chat_service = chat_service
-        self._message_history = message_history
-        self._operation_log = operation_log
-
-    async def handle_user_message(self, content: str) -> None:
-        """处理用户消息"""
-        # 创建用户消息
-        user_message = Message(
-            role="user",
-            content=content,
-            timestamp=datetime.now()
-        )
-
-        # 添加到历史
-        self._message_history.add_message(user_message)
-
-        # 发送到聊天服务
-        await self._process_response(content)
-
-    async def _process_response(self, user_input: str) -> None:
-        """处理响应"""
-        streaming_message = None
-        
-        async for event in self._chat_service.send_message(user_input):
-            if event["type"] == "user_message":
-                # 用户消息已处理
-                pass
-
-            elif event["type"] == "content_delta":
-                # 流式内容更新
-                if streaming_message is None:
-                    # 创建流式消息
-                    streaming_message = Message(
-                        role="assistant",
-                        content="",
-                        timestamp=datetime.now()
-                    )
-                    self._message_history.add_message(streaming_message)
-                
-                # 更新消息内容
-                self._message_history.update_latest_message(event["content"])
-
-            elif event["type"] == "assistant_message":
-                # 模型消息完成
-                if streaming_message:
-                    # 更新最终消息（包含工具调用信息）
-                    streaming_message.content = event["content"]
-                    streaming_message.tool_calls = event.get("tool_calls")
-                    streaming_message.tool_results = event.get("tool_results")
-                else:
-                    # 如果没有流式消息，直接添加
-                    message = Message(
-                        role="assistant",
-                        content=event["content"],
-                        timestamp=datetime.now(),
-                        tool_calls=event.get("tool_calls"),
-                        tool_results=event.get("tool_results")
-                    )
-                    self._message_history.add_message(message)
-
-            elif event["type"] == "tool_call":
-                # 工具调用开始
-                pass
-
-            elif event["type"] == "tool_result":
-                # 工具执行结果
-                log_entry = event["log_entry"]
-                self._operation_log.add_log(log_entry)
-
-            elif event["type"] == "error":
-                # 错误处理
-                error_message = Message(
-                    role="assistant",
-                    content=f"错误: {event['error']}",
-                    timestamp=datetime.now()
-                )
-                self._message_history.add_message(error_message)
diff --git a/ui/services/chat_service.py b/ui/services/chat_service.py
deleted file mode 100644
index fc96f43..0000000
--- a/ui/services/chat_service.py
+++ /dev/null
@@ -1,226 +0,0 @@
-"""聊天服务"""
-
-import asyncio
-import json
-from datetime import datetime
-from typing import AsyncIterator, TYPE_CHECKING, List, Dict, Any
-from ..core.imports import GraphMemoryClient
-from ..models.message import ToolCall, ToolResult
-from .tool_service import ToolService
-
-if TYPE_CHECKING:
-    from ..core.imports import Neo4jGraph
-
-
-class ChatService:
-    """聊天业务服务"""
-
-    def __init__(
-        self,
-        graph: "Neo4jGraph",
-        client: GraphMemoryClient,
-        tool_service: ToolService
-    ):
-        self._graph = graph
-        self._client = client
-        self._tool_service = tool_service
-        self._messages: List[Dict[str, Any]] = []
-
-    async def send_message(self, user_input: str) -> AsyncIterator[dict]:
-        """发送消息并流式返回事件"""
-        # 1. 发送用户消息事件
-        yield {
-            "type": "user_message",
-            "content": user_input
-        }
-
-        try:
-            # 2. 第一次API调用
-            accumulated_content = ""
-            tool_calls_data = []
-            
-            # 流式处理响应
-            async for chunk in self._call_api_stream_async(user_input):
-                if chunk.get("content_delta"):
-                    accumulated_content += chunk["content_delta"]
-                    yield {
-                        "type": "content_delta",
-                        "content": accumulated_content
-                    }
-                
-                if chunk.get("tool_calls"):
-                    tool_calls_data = chunk["tool_calls"]
-            
-            # 3. 如果有工具调用，执行并继续调用API
-            tool_calls = None
-            tool_results = None
-
-            if tool_calls_data:
-                tool_calls = []
-                tool_results = []
-
-                # 执行所有工具
-                for tool_call_data in tool_calls_data:
-                    tool_call = ToolCall(
-                        id=tool_call_data["id"],
-                        name=tool_call_data["function"]["name"],
-                        arguments=tool_call_data["function"]["arguments"]
-                    )
-                    tool_calls.append(tool_call)
-
-                    yield {
-                        "type": "tool_call",
-                        "tool_call": tool_call
-                    }
-
-                    result = await self._tool_service.execute(tool_call)
-                    tool_results.append(result)
-
-                    log_entry = ToolService._create_log_entry(tool_call, result)
-                    yield {
-                        "type": "tool_result",
-                        "tool_result": result,
-                        "log_entry": log_entry
-                    }
-
-                # 构建工具结果消息
-                tool_messages = []
-                for tc, tr in zip(tool_calls, tool_results):
-                    tool_messages.append({
-                        "role": "tool",
-                        "tool_call_id": tc.id,
-                        "content": tr.content
-                    })
-
-                # 构建assistant消息（包含tool_calls）
-                assistant_message = {
-                    "role": "assistant",
-                    "content": accumulated_content,
-                    "tool_calls": [
-                        {
-                            "id": tc.id,
-                            "type": "function",
-                            "function": {
-                                "name": tc.name,
-                                "arguments": tc.arguments
-                            }
-                        } for tc in tool_calls
-                    ]
-                }
-
-                # 第二次API调用，传入工具结果
-                final_content = ""
-                async for chunk in self._call_api_stream_with_tools(
-                    user_input, 
-                    assistant_message, 
-                    tool_messages
-                ):
-                    if chunk.get("content_delta"):
-                        final_content += chunk["content_delta"]
-                        yield {
-                            "type": "content_delta",
-                            "content": final_content
-                        }
-                
-                accumulated_content = final_content
-
-            # 4. 返回最终回复
-            yield {
-                "type": "assistant_message",
-                "content": accumulated_content,
-                "tool_calls": tool_calls,
-                "tool_results": tool_results
-            }
-
-        except Exception as e:
-            yield {
-                "type": "error",
-                "error": str(e)
-            }
-
-    async def _call_api_stream_async(self, message: str) -> AsyncIterator[dict]:
-        """异步流式调用 API"""
-        loop = asyncio.get_event_loop()
-        
-        def process_stream():
-            stream = self._client.send_message_stream(message)
-            tool_calls_accumulated = []
-            
-            for chunk in stream:
-                delta = chunk.choices[0].delta
-                
-                if delta.content:
-                    yield {"content_delta": delta.content}
-                
-                if delta.tool_calls:
-                    for tc in delta.tool_calls:
-                        if tc.index >= len(tool_calls_accumulated):
-                            tool_calls_accumulated.append({
-                                "id": tc.id,
-                                "type": "function",
-                                "function": {
-                                    "name": "",
-                                    "arguments": ""
-                                }
-                            })
-                        
-                        if tc.function:
-                            if tc.function.name:
-                                tool_calls_accumulated[tc.index]["function"]["name"] = tc.function.name
-                            if tc.function.arguments:
-                                tool_calls_accumulated[tc.index]["function"]["arguments"] += tc.function.arguments
-            
-            if tool_calls_accumulated:
-                yield {"tool_calls": tool_calls_accumulated}
-        
-        for result in await loop.run_in_executor(None, lambda: list(process_stream())):
-            yield result
-
-    async def _call_api_stream_with_tools(
-        self, 
-        user_input: str,
-        assistant_message: dict,
-        tool_messages: list
-    ) -> AsyncIterator[dict]:
-        """带工具结果的流式调用"""
-        loop = asyncio.get_event_loop()
-        
-        def process_stream():
-            # 构建完整的消息列表
-            messages = [
-                {"role": "system", "content": self._client.system_prompt},
-                {"role": "user", "content": user_input},
-                assistant_message
-            ]
-            messages.extend(tool_messages)
-            
-            # 调用API
-            response = self._client.client.chat.completions.create(
-                model="deepseek-chat",
-                messages=messages,
-                tools=self._client.tools,
-                tool_choice="auto",
-                stream=True
-            )
-            
-            for chunk in response:
-                delta = chunk.choices[0].delta
-                if delta.content:
-                    yield {"content_delta": delta.content}
-                
-                # 处理可能的工具调用
-                if delta.tool_calls:
-                    # 如果还有工具调用，说明AI想继续调用工具
-                    # 但我们限制只调用一次，所以忽略
-                    pass
-        
-        for result in await loop.run_in_executor(None, lambda: list(process_stream())):
-            yield result
-
-    def clear_history(self) -> None:
-        """清空消息历史"""
-        self._messages.clear()
-
-    def get_history(self) -> list[dict]:
-        """获取消息历史"""
-        return self._messages.copy()
diff --git a/ui/services/tool_service.py b/ui/services/tool_service.py
deleted file mode 100644
index fb37659..0000000
--- a/ui/services/tool_service.py
+++ /dev/null
@@ -1,88 +0,0 @@
-"""工具服务"""
-
-import asyncio
-import time
-from datetime import datetime
-from typing import Callable, TYPE_CHECKING
-from ..core.imports import execute_tool
-from ..models.log_entry import LogEntry
-from ..models.message import ToolCall, ToolResult
-
-if TYPE_CHECKING:
-    from ..core.imports import Neo4jGraph
-
-
-class ToolService:
-    """工具执行服务"""
-
-    def __init__(
-        self,
-        graph: "Neo4jGraph",
-        log_callback: Callable[[LogEntry], None] | None = None
-    ):
-        self._graph = graph
-        self._log_callback = log_callback
-
-    async def execute(self, tool_call: ToolCall) -> ToolResult:
-        """异步执行工具"""
-        start_time = time.time()
-
-        try:
-            # 在线程池中执行同步工具
-            loop = asyncio.get_event_loop()
-            result = await loop.run_in_executor(
-                None,
-                lambda: execute_tool(self._graph, tool_call.name, tool_call.arguments)
-            )
-
-            duration = time.time() - start_time
-
-            # 创建日志条目
-            log_entry = LogEntry(
-                timestamp=datetime.now(),
-                tool_name=tool_call.name,
-                arguments=tool_call.arguments,
-                result=result,
-                duration=duration
-            )
-
-            # 回调日志
-            if self._log_callback:
-                self._log_callback(log_entry)
-
-            # 返回结果
-            return ToolResult(
-                tool_call_id=tool_call.id,
-                name=tool_call.name,
-                arguments=tool_call.arguments,
-                result=result,
-                success=not result.startswith("工具执行错误")
-            )
-
-        except Exception as e:
-            duration = time.time() - start_time
-            error_msg = f"工具执行异常: {str(e)}"
-
-            # 创建错误日志
-            log_entry = LogEntry(
-                timestamp=datetime.now(),
-                tool_name=tool_call.name,
-                arguments=tool_call.arguments,
-                result=error_msg,
-                duration=duration
-            )
-
-            if self._log_callback:
-                self._log_callback(log_entry)
-
-            return ToolResult(
-                tool_call_id=tool_call.id,
-                name=tool_call.name,
-                arguments=tool_call.arguments,
-                result=error_msg,
-                success=False
-            )
-
-    def set_log_callback(self, callback: Callable[[LogEntry], None]) -> None:
-        """设置日志回调"""
-        self._log_callback = callback