diff --git a/api/app/controllers/app_controller.py b/api/app/controllers/app_controller.py
index a92cfab2..29656608 100644
--- a/api/app/controllers/app_controller.py
+++ b/api/app/controllers/app_controller.py
@@ -583,15 +583,27 @@ async def draft_run(
             )
 
             async def event_generator():
-                """工作流事件生成器"""
-
-                # 调用多智能体服务的流式方法
+                """工作流事件生成器
+                
+                将事件转换为标准 SSE 格式：
+                event: <event_type>
+                data: <json_data>
+                """
+                import json
+                
+                # 调用工作流服务的流式方法
                 async for event in workflow_service.run_stream(
                         app_id=app_id,
                         payload=payload,
                         config=config
                 ):
-                    yield event
+                    # 提取事件类型和数据
+                    event_type = event.get("event", "message")
+                    event_data = event.get("data", {})
+                    
+                    # 转换为标准 SSE 格式（字符串）
+                    sse_message = f"event: {event_type}\ndata: {json.dumps(event_data)}\n\n"
+                    yield sse_message
 
             return StreamingResponse(
                 event_generator(),
diff --git a/api/app/controllers/workflow_controller.py b/api/app/controllers/workflow_controller.py
index 091846f6..429aa67e 100644
--- a/api/app/controllers/workflow_controller.py
+++ b/api/app/controllers/workflow_controller.py
@@ -471,7 +471,20 @@ async def run_workflow(
             import json
 
             async def event_generator():
-                """生成 SSE 事件"""
+                """生成 SSE 事件
+                
+                SSE 格式：
+                event: <event_type>
+                data: <json_data>
+                
+                支持的事件类型：
+                - workflow_start: 工作流开始
+                - workflow_end: 工作流结束
+                - node_start: 节点开始执行
+                - node_end: 节点执行完成
+                - node_chunk: 中间节点的流式输出
+                - message: 最终消息的流式输出（End 节点及其相邻节点）
+                """
                 try:
                     async for event in await service.run_workflow(
                         app_id=app_id,
@@ -480,19 +493,30 @@ async def run_workflow(
                         conversation_id=uuid.UUID(request.conversation_id) if request.conversation_id else None,
                         stream=True
                     ):
-                        # 转换为 SSE 格式
-                        yield f"data: {json.dumps(event)}\n\n"
+                        # 提取事件类型和数据
+                        event_type = event.get("event", "message")
+                        event_data = event.get("data", {})
+                        
+                        # 转换为标准 SSE 格式（字符串）
+                        # event: <type>
+                        # data: <json>
+                        sse_message = f"event: {event_type}\ndata: {json.dumps(event_data)}\n\n"
+                        yield sse_message
+                        
                 except Exception as e:
                     logger.error(f"流式执行异常: {e}", exc_info=True)
-                    error_event = {
-                        "type": "error",
-                        "error": str(e)
-                    }
-                    yield f"data: {json.dumps(error_event)}\n\n"
+                    # 发送错误事件
+                    sse_error = f"event: error\ndata: {json.dumps({'error': str(e)})}\n\n"
+                    yield sse_error
 
             return StreamingResponse(
                 event_generator(),
-                media_type="text/event-stream"
+                media_type="text/event-stream",
+                headers={
+                    "Cache-Control": "no-cache",
+                    "Connection": "keep-alive",
+                    "X-Accel-Buffering": "no"  # 禁用 nginx 缓冲
+                }
             )
         else:
             # 非流式执行
diff --git a/api/app/core/agent/langchain_agent.py b/api/app/core/agent/langchain_agent.py
index dc0d6922..3c33ad6e 100644
--- a/api/app/core/agent/langchain_agent.py
+++ b/api/app/core/agent/langchain_agent.py
@@ -9,18 +9,15 @@ LangChain Agent 封装
 """
 import os
 import time
-import asyncio
 from typing import Dict, Any, List, Optional, AsyncGenerator, Sequence
 from langchain_core.messages import SystemMessage, HumanMessage, AIMessage, BaseMessage
 from langchain_core.tools import BaseTool
 from langchain.agents import create_agent
 
-from app.core.memory.agent.mcp_server.services import session_service
 from app.core.memory.agent.utils.redis_tool import store
 from app.core.models import RedBearLLM, RedBearModelConfig
 from app.models.models_model import ModelType
 from app.core.logging_config import get_business_logger
-from app.services.memory_agent_service import MemoryAgentService
 from app.services.memory_konwledges_server import write_rag
 from app.services.task_service import get_task_memory_write_result
 from app.tasks import write_message_task
diff --git a/api/app/core/models/llm.py b/api/app/core/models/llm.py
index 5808d31a..7cd12faa 100644
--- a/api/app/core/models/llm.py
+++ b/api/app/core/models/llm.py
@@ -1,8 +1,8 @@
 from __future__ import annotations
-from typing import Any, Dict, List, Optional
+from typing import Any, Iterator, AsyncIterator, List, Optional
 from langchain_core.callbacks import CallbackManagerForLLMRun, AsyncCallbackManagerForLLMRun
 from langchain_core.language_models import BaseLLM
-from langchain_core.outputs import LLMResult
+from langchain_core.outputs import LLMResult, GenerationChunk
 
 from app.core.models import RedBearModelConfig, RedBearModelFactory, get_provider_llm_class
 from app.models.models_model import ModelType
@@ -10,21 +10,36 @@ from app.models.models_model import ModelType
 
 class RedBearLLM(BaseLLM):
     """
-    RedBear LLM 模型包装器 - 完全动态代理实现
+    RedBear LLM Model Wrapper
     
-    这个包装器自动将所有方法调用委托给内部模型，
-    同时提供优雅的回退机制和错误处理。
+    This wrapper provides a unified interface to access different LLM providers,
+    while maintaining all LangChain functionality, including streaming output.
+    
+    Features:
+    - Support for multiple LLM providers (OpenAI, Qwen, Ollama, etc.)
+    - Full streaming output support
+    - Elegant error handling and fallback mechanism
+    - Automatic proxying of all underlying model methods and attributes
     """
 
-    def __init__(self, config: RedBearModelConfig, type: ModelType=ModelType.LLM):
-        self._model = self._create_model(config, type)
+    def __init__(self, config: RedBearModelConfig, type: ModelType = ModelType.LLM):
+        """Initialize RedBear LLM wrapper
+        
+        Args:
+            config: Model configuration
+            type: Model type (LLM or CHAT)
+        """
+        super().__init__()
         self._config = config
+        self._model = self._create_model(config, type)
 
     @property
     def _llm_type(self) -> str:
-        """返回LLM类型标识符"""
-        return self._model._llm_type
+        """Return LLM type identifier"""
+        return getattr(self._model, '_llm_type', 'redbear_llm')
 
+    # ==================== Core Methods (Required by BaseLLM) ====================
+    
     def _generate(
         self,
         prompts: List[str],
@@ -32,7 +47,7 @@ class RedBearLLM(BaseLLM):
         run_manager: Optional[CallbackManagerForLLMRun] = None,
         **kwargs: Any
     ) -> LLMResult:
-        """同步生成文本"""
+        """Synchronous text generation (required by BaseLLM)"""
         return self._model._generate(prompts, stop=stop, run_manager=run_manager, **kwargs)
 
     async def _agenerate(
@@ -42,92 +57,233 @@ class RedBearLLM(BaseLLM):
         run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
         **kwargs: Any
     ) -> LLMResult:
-        """异步生成文本"""
+        """Asynchronous text generation (required by BaseLLM)"""
         return await self._model._agenerate(prompts, stop=stop, run_manager=run_manager, **kwargs)
 
-    # 关键：覆盖 invoke/ainvoke，直接委托到底层模型，避免 BaseLLM 的字符串化行为
+    # ==================== Advanced Methods (Support Message Lists) ====================
+    
     def invoke(self, input: Any, config: Optional[dict] = None, **kwargs: Any) -> Any:
-        """直接调用底层模型以支持 ChatPrompt 和消息列表。"""
+        """Synchronous model invocation
+        
+        Supports various input formats including strings and message lists.
+        Directly delegates to the underlying model to avoid BaseLLM's string conversion.
+        
+        Args:
+            input: Input (string, message list, etc.)
+            config: Runtime configuration
+            **kwargs: Additional arguments
+            
+        Returns:
+            Model response
+        """
         try:
             return self._model.invoke(input, config=config, **kwargs)
         except AttributeError as e:
-            # 只在属性错误时回退（说明底层模型不支持该方法）
             if 'invoke' in str(e):
+                # Underlying model doesn't support invoke, fallback to parent implementation
                 return super().invoke(input, config=config, **kwargs)
-            # 其他 AttributeError 直接抛出
             raise
         except Exception:
-            # 其他所有异常（包括 ValidationException）直接抛出，不回退
+            # Other exceptions are raised directly
             raise
 
     async def ainvoke(self, input: Any, config: Optional[dict] = None, **kwargs: Any) -> Any:
-        """异步直接调用底层模型以支持 ChatPrompt 和消息列表。"""
+        """Asynchronous model invocation
+        
+        Supports various input formats including strings and message lists.
+        Directly delegates to the underlying model to avoid BaseLLM's string conversion.
+        
+        Args:
+            input: Input (string, message list, etc.)
+            config: Runtime configuration
+            **kwargs: Additional arguments
+            
+        Returns:
+            Model response
+        """
         try:
             return await self._model.ainvoke(input, config=config, **kwargs)
         except AttributeError as e:
-            # 只在属性错误时回退（说明底层模型不支持该方法）
             if 'ainvoke' in str(e):
+                # Underlying model doesn't support ainvoke, fallback to parent implementation
                 return await super().ainvoke(input, config=config, **kwargs)
-            # 其他 AttributeError 直接抛出
             raise
         except Exception:
-            # 其他所有异常（包括 ValidationException）直接抛出，不回退
+            # Other exceptions are raised directly
             raise
 
-    def __getattr__(self, name):
-        """
-        动态代理：将所有未定义的属性和方法调用委托给内部模型
+    # ==================== Streaming Methods (Critical) ====================
+    
+    def stream(
+        self,
+        input: Any,
+        config: Optional[dict] = None,
+        *,
+        stop: Optional[List[str]] = None,
+        **kwargs: Any
+    ) -> Iterator[GenerationChunk]:
+        """Synchronous streaming model invocation
         
-        这是最优雅的包装器实现方式，完全避免了方法重复定义
-        """
-        # 处理特殊属性以避免递归
-        if name in ('__isabstractmethod__', '__dict__', '__class__'):
-            raise AttributeError(f"'{type(self).__name__}' object has no attribute '{name}'")
+        Args:
+            input: Input (string, message list, etc.)
+            config: Runtime configuration
+            stop: List of stop words
+            **kwargs: Additional arguments
             
-        # 检查内部模型是否有该属性（使用安全的方式避免递归）
+        Yields:
+            GenerationChunk: Generated text chunks
+        """
+        try:
+            yield from self._model.stream(input, config=config, stop=stop, **kwargs)
+        except AttributeError as e:
+            if 'stream' in str(e):
+                # Underlying model doesn't support stream, fallback to parent implementation
+                yield from super().stream(input, config=config, stop=stop, **kwargs)
+            else:
+                raise
+        except Exception:
+            raise
+    
+    async def astream(
+        self,
+        input: Any,
+        config: Optional[dict] = None,
+        *,
+        stop: Optional[List[str]] = None,
+        **kwargs: Any
+    ) -> AsyncIterator[GenerationChunk]:
+        """Asynchronous streaming model invocation
+        
+        This is the core method for streaming output. It directly proxies to the
+        underlying model's astream method, maintaining generator characteristics
+        to ensure each chunk is delivered in real-time.
+        
+        Args:
+            input: Input (string, message list, etc.)
+            config: Runtime configuration
+            stop: List of stop words
+            **kwargs: Additional arguments
+            
+        Yields:
+            GenerationChunk: Generated text chunks
+        """
+        try:
+            async for chunk in self._model.astream(input, config=config, stop=stop, **kwargs):
+                yield chunk
+        except AttributeError as e:
+            if 'astream' in str(e):
+                # Underlying model doesn't support astream, fallback to parent implementation
+                async for chunk in super().astream(input, config=config, stop=stop, **kwargs):
+                    yield chunk
+            else:
+                raise
+        except Exception:
+            raise
+
+    # ==================== Dynamic Proxy ====================
+    
+    def __getattr__(self, name: str) -> Any:
+        """Dynamic proxy: delegate undefined attributes and method calls to internal model
+        
+        This method allows RedBearLLM to transparently access all attributes and methods
+        of the underlying model without explicitly defining each one.
+        
+        Args:
+            name: Attribute or method name
+            
+        Returns:
+            Attribute value or method
+            
+        Raises:
+            AttributeError: If attribute doesn't exist
+        """
+        # Avoid recursion: raise error directly for special attributes
+        if name in ('__isabstractmethod__', '__dict__', '__class__', '_model', '_config'):
+            raise AttributeError(f"'{type(self).__name__}' object has no attribute '{name}'")
+        
+        # Try to get attribute from internal model
         try:
-            # 使用 object.__getattribute__ 来安全地检查内部模型的属性
             attr = object.__getattribute__(self._model, name)
             
-            # 如果是方法，返回一个包装器来处理调用
+            # If it's callable (a method)
             if callable(attr):
-                # 流式方法直接返回，不包装（保持生成器特性）
-                if name in ('_stream', '_astream', 'stream', 'astream'):
+                # Streaming methods are returned directly to maintain generator characteristics
+                # Note: Although we've explicitly implemented stream/astream,
+                # this is kept to handle internal methods like _stream/_astream
+                if name in ('_stream', '_astream'):
                     return attr
                 
-                # 非流式方法使用包装器处理异常
+                # Wrap other methods for easier debugging and error handling
                 def method_wrapper(*args, **kwargs):
-                    return attr(*args, **kwargs)
+                    try:
+                        return attr(*args, **kwargs)
+                    except Exception:
+                        # Can add logging or error handling here
+                        raise
                 
-                # 保持方法的元信息
+                # Preserve method metadata
                 method_wrapper.__name__ = name
                 method_wrapper.__doc__ = getattr(attr, '__doc__', f"Delegated method: {name}")
                 return method_wrapper
             
-            # 如果是普通属性，直接返回
+            # If it's a regular attribute, return directly
             return attr
             
         except AttributeError:
-            # 内部模型没有该属性，尝试回退实现
+            # Internal model doesn't have this attribute either
             pass
         
-        # 检查是否有回退方法（使用安全的方式避免递归）
+        # Check if there's a fallback method
         fallback_name = f'_fallback_{name}'
         try:
-            fallback_method = object.__getattribute__(self, fallback_name)
-            return fallback_method
+            return object.__getattribute__(self, fallback_name)
         except AttributeError:
-            # 没有回退方法，抛出适当的错误
             pass
         
-        # 如果都没有，抛出适当的错误
-        raise AttributeError(f"'{type(self).__name__}' object has no attribute '{name}'")
+        # Nothing found, raise error
+        raise AttributeError(
+            f"'{type(self).__name__}' object has no attribute '{name}'. "
+            f"The underlying model '{type(self._model).__name__}' also doesn't have this attribute."
+        )
 
+    # ==================== Helper Methods ====================
+    
     def _create_model(self, config: RedBearModelConfig, type: ModelType) -> BaseLLM:
-        """创建内部模型实例"""
+        """Create internal model instance
+        
+        Args:
+            config: Model configuration
+            type: Model type
+            
+        Returns:
+            Created model instance
+        """
         llm_class = get_provider_llm_class(config, type)
         model_params = RedBearModelFactory.get_model_params(config)
         return llm_class(**model_params)
-
-
-   
\ No newline at end of file
+    
+    def get_config(self) -> RedBearModelConfig:
+        """Get model configuration
+        
+        Returns:
+            Model configuration object
+        """
+        return self._config
+    
+    def get_underlying_model(self) -> BaseLLM:
+        """Get underlying model instance
+        
+        Returns:
+            Underlying model instance
+        """
+        return self._model
+    
+    def __repr__(self) -> str:
+        """Return string representation of the object"""
+        return (
+            f"RedBearLLM("
+            f"provider={self._config.provider}, "
+            f"model={self._config.model_name}, "
+            f"type={type(self._model).__name__}"
+            f")"
+        )
\ No newline at end of file
diff --git a/api/app/core/workflow/executor.py b/api/app/core/workflow/executor.py
index 46f8cf08..3555d179 100644
--- a/api/app/core/workflow/executor.py
+++ b/api/app/core/workflow/executor.py
@@ -94,16 +94,90 @@ class WorkflowExecutor:
             "workspace_id": self.workspace_id,
             "user_id": self.user_id,
             "error": None,
-            "error_node": None
+            "error_node": None,
+            "streaming_buffer": {}  # 流式缓冲区
         }
 
-    def build_graph(self) -> CompiledStateGraph:
+
+
+    def _analyze_end_node_prefixes(self) -> tuple[dict[str, str], set[str]]:
+        """分析 End 节点的前缀配置
+        
+        检查每个 End 节点的模板，找到直接上游节点的引用，
+        提取该引用之前的前缀部分。
+        
+        Returns:
+            元组：({上游节点ID: End节点前缀}, {与End相邻且被引用的节点ID集合})
+        """
+        import re
+        
+        prefixes = {}
+        adjacent_and_referenced = set()  # 记录与 End 节点相邻且被引用的节点
+        
+        # 找到所有 End 节点
+        end_nodes = [node for node in self.nodes if node.get("type") == "end"]
+        logger.info(f"[前缀分析] 找到 {len(end_nodes)} 个 End 节点")
+        
+        for end_node in end_nodes:
+            end_node_id = end_node.get("id")
+            output_template = end_node.get("config", {}).get("output")
+            
+            logger.info(f"[前缀分析] End 节点 {end_node_id} 模板: {output_template}")
+            
+            if not output_template:
+                continue
+            
+            # 找到所有直接连接到 End 节点的上游节点
+            direct_upstream_nodes = []
+            for edge in self.edges:
+                if edge.get("target") == end_node_id:
+                    source_node_id = edge.get("source")
+                    direct_upstream_nodes.append(source_node_id)
+            
+            logger.info(f"[前缀分析] End 节点的直接上游节点: {direct_upstream_nodes}")
+            
+            # 查找模板中引用了哪些节点
+            # 匹配 {{node_id.xxx}} 或 {{ node_id.xxx }} 格式（支持空格）
+            pattern = r'\{\{\s*([a-zA-Z0-9_]+)\.[a-zA-Z0-9_]+\s*\}\}'
+            matches = list(re.finditer(pattern, output_template))
+            
+            logger.info(f"[前缀分析] 模板中找到 {len(matches)} 个节点引用")
+            
+            # 找到第一个直接上游节点的引用
+            for match in matches:
+                referenced_node_id = match.group(1)
+                logger.info(f"[前缀分析] 检查引用: {referenced_node_id}")
+                
+                if referenced_node_id in direct_upstream_nodes:
+                    # 这是直接上游节点的引用，提取前缀
+                    prefix = output_template[:match.start()]
+                    
+                    logger.info(f"[前缀分析] ✅ 找到直接上游节点 {referenced_node_id} 的引用，前缀: '{prefix}'")
+                    
+                    # 标记这个节点为"相邻且被引用"
+                    adjacent_and_referenced.add(referenced_node_id)
+                    
+                    if prefix:
+                        prefixes[referenced_node_id] = prefix
+                        logger.info(f"✅ [前缀分析] 为节点 {referenced_node_id} 配置前缀: '{prefix[:50]}...'")
+                    
+                    # 只处理第一个直接上游节点的引用
+                    break
+        
+        logger.info(f"[前缀分析] 最终配置: {prefixes}")
+        logger.info(f"[前缀分析] 与 End 相邻且被引用的节点: {adjacent_and_referenced}")
+        return prefixes, adjacent_and_referenced
+
+    def build_graph(self,stream=False) -> CompiledStateGraph:
         """构建 LangGraph
 
         Returns:
             编译后的状态图
         """
         logger.info(f"开始构建工作流图: execution_id={self.execution_id}")
+        
+        # 分析 End 节点的前缀配置和相邻且被引用的节点
+        end_prefixes, adjacent_and_referenced = self._analyze_end_node_prefixes() if stream else ({}, set())
 
         # 1. 创建状态图
         workflow = StateGraph(WorkflowState)
@@ -143,16 +217,39 @@ class WorkflowExecutor:
                     related_edge[idx]['condition'] = f"node.{node_id}.output == '{related_edge[idx]['label']}'"
 
             if node_instance:
+                # 如果是流式模式，且节点有 End 前缀配置，注入配置
+                if stream and node_id in end_prefixes:
+                    # 将 End 前缀配置注入到节点实例
+                    node_instance._end_node_prefix = end_prefixes[node_id]
+                    logger.info(f"为节点 {node_id} 注入 End 前缀配置")
+                
+                # 如果是流式模式，标记节点是否与 End 相邻且被引用
+                if stream:
+                    node_instance._is_adjacent_to_end = node_id in adjacent_and_referenced
+                    if node_id in adjacent_and_referenced:
+                        logger.info(f"节点 {node_id} 标记为与 End 相邻且被引用")
+                
                 # 包装节点的 run 方法
                 # 使用函数工厂避免闭包问题
-                def make_node_func(inst):
-                    async def node_func(state: WorkflowState):
-                        return await inst.run(state)
+                if stream:
+                    # 流式模式：创建 async generator 函数
+                    # LangGraph 会收集所有 yield 的值，最后一个 yield 的字典会被合并到 state
+                    def make_stream_func(inst):
+                        async def node_func(state: WorkflowState):
+                            # logger.debug(f"流式执行节点: {inst.node_id}, 支持流式: {inst.supports_streaming()}")
+                            async for item in inst.run_stream(state):
+                                yield item
+                        return node_func
+                    workflow.add_node(node_id, make_stream_func(node_instance))
+                else:
+                    # 非流式模式：创建 async function
+                    def make_func(inst):
+                        async def node_func(state: WorkflowState):
+                            return await inst.run(state)
+                        return node_func
+                    workflow.add_node(node_id, make_func(node_instance))
 
-                    return node_func
-
-                workflow.add_node(node_id, make_node_func(node_instance))
-                logger.debug(f"添加节点: {node_id} (type={node_type})")
+                logger.debug(f"添加节点: {node_id} (type={node_type}, stream={stream})")
 
         # 3. 添加边
         # 从 START 连接到 start 节点
@@ -300,40 +397,143 @@ class WorkflowExecutor:
     ):
         """执行工作流（流式）
 
-        手动执行节点以支持细粒度的流式输出：
-        - workflow_start: 工作流开始
-        - node_start: 节点开始执行
-        - node_chunk: LLM 节点的流式输出片段（逐 token）
-        - node_complete: 节点执行完成
-        - workflow_complete: 工作流完成
+        使用多个 stream_mode 来获取：
+        1. "updates" - 节点的 state 更新和流式 chunk
+        2. "debug" - 节点执行的详细信息（开始/完成时间）
+        3. "custom" - 自定义流式数据（chunks）
 
         Args:
             input_data: 输入数据
 
         Yields:
-            流式事件
+            流式事件，格式：
+            {
+                "event": "workflow_start" | "workflow_end" | "node_start" | "node_end" | "node_chunk" | "message",
+                "data": {...}
+            }
         """
-        #
-        logger.info(f"开始执行工作流: execution_id={self.execution_id}")
+        logger.info(f"开始执行工作流（流式）: execution_id={self.execution_id}")
 
         # 记录开始时间
         start_time = datetime.datetime.now()
+        
+        # 发送 workflow_start 事件
+        yield {
+            "event": "workflow_start",
+            "data": {
+                "execution_id": self.execution_id,
+                "workspace_id": self.workspace_id,
+                "timestamp": start_time.isoformat()
+            }
+        }
 
         # 1. 构建图
-        graph = self.build_graph()
+        graph = self.build_graph(True)
 
         # 2. 初始化状态（自动注入系统变量）
         initial_state = self._prepare_initial_state(input_data)
 
-        # 3. 执行工作流
+        # 3. Execute workflow
         try:
-            async for chunk in graph.astream(
+            chunk_count = 0
+            final_state = None
+            
+            async for event in graph.astream(
                     initial_state,
-                    # subgraphs=True,
-                    stream_mode="updates",
+                    stream_mode=["updates", "debug", "custom"],  # Use updates + debug + custom mode
             ):
-                # print(chunk)
-                yield chunk
+                # event should be a tuple: (mode, data)
+                # But let's handle both cases
+                if isinstance(event, tuple) and len(event) == 2:
+                    mode, data = event
+                else:
+                    # Unexpected format, log and skip
+                    logger.warning(f"[STREAM] Unexpected event format: {type(event)}, value: {event}")
+                    continue
+
+                if mode == "custom":
+                    # Handle custom streaming events (chunks from nodes via stream writer)
+                    chunk_count += 1
+                    event_type = data.get("type", "node_chunk")  # "message" or "node_chunk"
+                    logger.info(f"[CUSTOM] ✅ 收到 {event_type} #{chunk_count} from {data.get('node_id')}")
+                    
+                    yield {
+                        "event": event_type,  # "message" or "node_chunk"
+                        "data": {
+                            "node_id": data.get("node_id"),
+                            "chunk": data.get("chunk"),
+                            "full_content": data.get("full_content"),
+                            "chunk_index": data.get("chunk_index"),
+                            "is_prefix": data.get("is_prefix"),
+                            "is_suffix": data.get("is_suffix")
+                        }
+                    }
+                
+                elif mode == "debug":
+                    # Handle debug information (node execution status)
+                    event_type = data.get("type")
+                    payload = data.get("payload", {})
+                    node_name = payload.get("name")
+
+                    if event_type == "task":
+                        # Node starts execution
+                        inputv = payload.get("input", {})
+                        variables = inputv.get("variables", {})
+                        variables_sys = variables.get("sys", {})
+                        conversation_id = variables_sys.get("conversation_id")
+                        execution_id = variables_sys.get("execution_id")
+                        logger.info(f"[DEBUG] Node starts execution: {node_name}")
+                        
+                        yield {
+                            "event": "node_start",
+                            "data": {
+                                "node_id": node_name,
+                                "conversation_id": conversation_id,
+                                "execution_id": execution_id,
+                                "timestamp": data.get("timestamp")
+                            }
+                        }
+                    elif event_type == "task_result":
+                        # Node execution completed
+                        result = payload.get("result", {})
+                        inputv = result.get("input", {})
+                        variables = inputv.get("variables", {})
+                        variables_sys = variables.get("sys", {})
+                        conversation_id = variables_sys.get("conversation_id")
+                        execution_id = variables_sys.get("execution_id")
+                        logger.info(f"[DEBUG] Node execution completed: {node_name}")
+                        
+                        yield {
+                            "event": "node_end",
+                            "data": {
+                                "node_id": node_name,
+                                "conversation_id": conversation_id,
+                                "execution_id": execution_id,
+                                "timestamp": data.get("timestamp")
+                            }
+                        }
+
+                elif mode == "updates":
+                    # Handle state updates - store final state
+                    logger.debug(f"[UPDATES] 收到 state 更新 from {list(data.keys())}")
+                    final_state = data
+            
+            # 计算耗时
+            end_time = datetime.datetime.now()
+            elapsed_time = (end_time - start_time).total_seconds()
+            
+            logger.info(f"Workflow execution completed (streaming), total chunks: {chunk_count}, elapsed: {elapsed_time:.2f}s")
+            
+            # 发送 workflow_end 事件
+            yield {
+                "event": "workflow_end",
+                "data": {
+                    "execution_id": self.execution_id,
+                    "status": "completed",
+                    "elapsed_time": elapsed_time,
+                    "timestamp": end_time.isoformat()
+                }
+            }
 
         except Exception as e:
             # 计算耗时（即使失败也记录）
@@ -341,13 +541,17 @@ class WorkflowExecutor:
             elapsed_time = (end_time - start_time).total_seconds()
 
             logger.error(f"工作流执行失败: execution_id={self.execution_id}, error={e}", exc_info=True)
+            
+            # 发送 workflow_end 事件（失败）
             yield {
-                "status": "failed",
-                "error": str(e),
-                "output": None,
-                "node_outputs": {},
-                "elapsed_time": elapsed_time,
-                "token_usage": None
+                "event": "workflow_end",
+                "data": {
+                    "execution_id": self.execution_id,
+                    "status": "failed",
+                    "error": str(e),
+                    "elapsed_time": elapsed_time,
+                    "timestamp": end_time.isoformat()
+                }
             }
 
     def _extract_final_output(self, node_outputs: dict[str, Any]) -> str | None:
diff --git a/api/app/core/workflow/nodes/base_node.py b/api/app/core/workflow/nodes/base_node.py
index d17cc1fd..25fdd29e 100644
--- a/api/app/core/workflow/nodes/base_node.py
+++ b/api/app/core/workflow/nodes/base_node.py
@@ -10,6 +10,7 @@ from abc import ABC, abstractmethod
 from typing import Any, TypedDict, Annotated
 from operator import add
 from langchain_core.messages import AnyMessage, HumanMessage, AIMessage
+from langgraph.config import get_stream_writer
 
 from app.core.workflow.variable_pool import VariablePool
 
@@ -43,6 +44,10 @@ class WorkflowState(TypedDict):
     # 错误信息（用于错误边）
     error: str | None
     error_node: str | None
+    
+    # 流式缓冲区（存储节点的实时流式输出）
+    # 格式：{node_id: {"chunks": [...], "full_content": "..."}}
+    streaming_buffer: Annotated[dict[str, Any], lambda x, y: {**x, **y}]
 
 
 class BaseNode(ABC):
@@ -201,19 +206,25 @@ class BaseNode(ABC):
             return self._wrap_error(str(e), elapsed_time, state)
     
     async def run_stream(self, state: WorkflowState):
-        """执行节点（带错误处理和输出包装，流式）
+        """Execute node with error handling and output wrapping (streaming)
         
-        这个方法由 Executor 调用，负责：
-        1. 时间统计
-        2. 调用节点的 execute_stream() 方法
-        3. 将业务数据包装成标准输出格式
-        4. 错误处理
+        This method is called by the Executor and is responsible for:
+        1. Time tracking
+        2. Calling the node's execute_stream() method
+        3. Using LangGraph's stream writer to send chunks
+        4. Updating streaming buffer in state for downstream nodes
+        5. Wrapping business data into standard output format
+        6. Error handling
+        
+        Special handling for End nodes:
+        - End nodes don't send chunks via writer (prefix and LLM content already sent)
+        - End nodes only yield suffix for final result assembly
         
         Args:
-            state: 工作流状态
+            state: Workflow state
         
         Yields:
-            标准化的流式事件
+            State updates with streaming buffer and final result
         """
         import time
         
@@ -222,68 +233,143 @@ class BaseNode(ABC):
         try:
             timeout = self.get_timeout()
             
-            # 累积完整结果（用于最后的包装）
+            # Get LangGraph's stream writer for sending custom data
+            writer = get_stream_writer()
+            
+            # Check if this is an End node
+            # End nodes CAN send chunks (for suffix), but only after LLM content
+            is_end_node = self.node_type == "end"
+            
+            # Check if this node is adjacent to End node (for message type)
+            is_adjacent_to_end = getattr(self, '_is_adjacent_to_end', False)
+            
+            # Determine chunk type: "message" for End and adjacent nodes, "node_chunk" for others
+            chunk_type = "message" if (is_end_node or is_adjacent_to_end) else "node_chunk"
+            
+            logger.debug(f"节点 {self.node_id} chunk 类型: {chunk_type} (is_end={is_end_node}, adjacent={is_adjacent_to_end})")
+            
+            # Accumulate complete result (for final wrapping)
             chunks = []
             final_result = None
+            chunk_count = 0
             
-            # 使用异步生成器包装，支持超时
-            async def stream_with_timeout():
-                nonlocal final_result
-                loop_start = asyncio.get_event_loop().time()
+            # Stream chunks in real-time
+            loop_start = asyncio.get_event_loop().time()
+            
+            async for item in self.execute_stream(state):
+                # Check timeout
+                if asyncio.get_event_loop().time() - loop_start > timeout:
+                    raise TimeoutError()
                 
-                async for item in self.execute_stream(state):
-                    # 检查超时
-                    if asyncio.get_event_loop().time() - loop_start > timeout:
-                        raise TimeoutError()
+                # Check if it's a completion marker
+                if isinstance(item, dict) and item.get("__final__"):
+                    final_result = item["result"]
+                elif isinstance(item, str):
+                    # String is a chunk
+                    chunk_count += 1
+                    chunks.append(item)
+                    full_content = "".join(chunks)
                     
-                    # 检查是否是完成标记
-                    if isinstance(item, dict) and item.get("__final__"):
-                        final_result = item["result"]
-                    elif isinstance(item, str):
-                        # 字符串是 chunk
-                        chunks.append(item)
+                    # Send chunks for all nodes (including End nodes for suffix)
+                    logger.debug(f"节点 {self.node_id} 发送 chunk #{chunk_count}: {item[:50]}...")
+                    
+                    # 1. Send via stream writer (for real-time client updates)
+                    writer({
+                        "type": chunk_type,  # "message" or "node_chunk"
+                        "node_id": self.node_id,
+                        "chunk": item,
+                        "full_content": full_content,
+                        "chunk_index": chunk_count
+                    })
+                    
+                    # 2. Update streaming buffer in state (for downstream nodes)
+                    # Only non-End nodes need streaming buffer
+                    if not is_end_node:
                         yield {
-                            "type": "chunk",
-                            "node_id": self.node_id,
-                            "content": item,
-                            "full_content": "".join(chunks)
+                            "streaming_buffer": {
+                                self.node_id: {
+                                    "full_content": full_content,
+                                    "chunk_count": chunk_count,
+                                    "is_complete": False
+                                }
+                            }
                         }
-                    else:
-                        # 其他类型也当作 chunk 处理
-                        chunks.append(str(item))
+                else:
+                    # Other types are also treated as chunks
+                    chunk_count += 1
+                    chunk_str = str(item)
+                    chunks.append(chunk_str)
+                    full_content = "".join(chunks)
+                    
+                    # Send chunks for all nodes
+                    writer({
+                        "type": chunk_type,  # "message" or "node_chunk"
+                        "node_id": self.node_id,
+                        "chunk": chunk_str,
+                        "full_content": full_content,
+                        "chunk_index": chunk_count
+                    })
+                    
+                    # Only non-End nodes need streaming buffer
+                    if not is_end_node:
                         yield {
-                            "type": "chunk",
-                            "node_id": self.node_id,
-                            "content": str(item),
-                            "full_content": "".join(chunks)
+                            "streaming_buffer": {
+                                self.node_id: {
+                                    "full_content": full_content,
+                                    "chunk_count": chunk_count,
+                                    "is_complete": False
+                                }
+                            }
                         }
             
-            async for chunk_event in stream_with_timeout():
-                yield chunk_event
-            
             elapsed_time = time.time() - start_time
             
-            # 包装最终结果
+            logger.info(f"节点 {self.node_id} 流式执行完成，耗时: {elapsed_time:.2f}s, chunks: {chunk_count}")
+            
+            # Extract processed output (call subclass's _extract_output)
+            extracted_output = self._extract_output(final_result)
+            
+            # Wrap final result
             final_output = self._wrap_output(final_result, elapsed_time, state)
-            yield {
-                "type": "complete",
-                **final_output
+            
+            # Store extracted output in runtime variables (for quick access by subsequent nodes)
+            if isinstance(extracted_output, dict):
+                runtime_var = extracted_output
+            else:
+                runtime_var = {"output": extracted_output}
+            
+            # Build complete state update (including node_outputs, runtime_vars, and final streaming buffer)
+            state_update = {
+                **final_output,
+                "runtime_vars": {
+                    self.node_id: runtime_var
+                }
             }
+            
+            # Add streaming buffer for non-End nodes
+            if not is_end_node:
+                state_update["streaming_buffer"] = {
+                    self.node_id: {
+                        "full_content": "".join(chunks),
+                        "chunk_count": chunk_count,
+                        "is_complete": True  # Mark as complete
+                    }
+                }
+            
+            # Finally yield state update
+            # LangGraph will merge this into state
+            yield state_update
                 
         except TimeoutError:
             elapsed_time = time.time() - start_time
-            logger.error(f"节点 {self.node_id} 执行超时（{timeout}秒）")
-            yield {
-                "type": "error",
-                **self._wrap_error(f"节点执行超时（{timeout}秒）", elapsed_time, state)
-            }
+            logger.error(f"节点 {self.node_id} 执行超时 ({timeout}s)")
+            error_output = self._wrap_error(f"节点执行超时 ({timeout}s)", elapsed_time, state)
+            yield error_output
         except Exception as e:
             elapsed_time = time.time() - start_time
             logger.error(f"节点 {self.node_id} 执行失败: {e}", exc_info=True)
-            yield {
-                "type": "error",
-                **self._wrap_error(str(e), elapsed_time, state)
-            }
+            error_output = self._wrap_error(str(e), elapsed_time, state)
+            yield error_output
     
     def _wrap_output(
         self, 
diff --git a/api/app/core/workflow/nodes/end/node.py b/api/app/core/workflow/nodes/end/node.py
index ad028f31..8540cf9d 100644
--- a/api/app/core/workflow/nodes/end/node.py
+++ b/api/app/core/workflow/nodes/end/node.py
@@ -5,6 +5,8 @@ End 节点实现
 """
 
 import logging
+import re
+import asyncio
 
 from app.core.workflow.nodes.base_node import BaseNode, WorkflowState
 
@@ -15,6 +17,7 @@ class EndNode(BaseNode):
     """End 节点
     
     工作流的结束节点，根据配置的模板输出最终结果。
+    支持实时流式输出：如果模板引用了上游节点的输出，会实时监听其流式缓冲区。
     """
     
     async def execute(self, state: WorkflowState) -> str:
@@ -30,11 +33,7 @@ class EndNode(BaseNode):
         
         # 获取配置的输出模板
         output_template = self.config.get("output")
-        pool = self.get_variable_pool(state)
-       
-        print("="*20)
-        print( pool.get("start.test"))
-        print("="*20)
+        
         # 如果配置了输出模板，使用模板渲染；否则使用默认输出
         if output_template:
             output = self._render_template(output_template, state)
@@ -46,7 +45,213 @@ class EndNode(BaseNode):
         total_nodes = len(node_outputs)
         
         logger.info(f"节点 {self.node_id} (End) 执行完成，共执行 {total_nodes} 个节点")
-        print("="*20)
-        print(output)
-        print("="*20)
+        
         return output
+    
+    def _extract_referenced_nodes(self, template: str) -> list[str]:
+        """从模板中提取引用的节点 ID
+        
+        例如：'结果：{{llm_qa.output}}' -> ['llm_qa']
+        
+        Args:
+            template: 模板字符串
+        
+        Returns:
+            引用的节点 ID 列表
+        """
+        # 匹配 {{node_id.xxx}} 格式
+        pattern = r'\{\{([a-zA-Z0-9_]+)\.[a-zA-Z0-9_]+\}\}'
+        matches = re.findall(pattern, template)
+        return list(set(matches))  # 去重
+    
+    def _parse_template_parts(self, template: str, state: WorkflowState) -> list[dict]:
+        """解析模板，分离静态文本和动态引用
+        
+        例如：'你好 {{llm.output}}, 这是后缀'
+        返回：[
+            {"type": "static", "content": "你好 "},
+            {"type": "dynamic", "node_id": "llm", "field": "output"},
+            {"type": "static", "content": ", 这是后缀"}
+        ]
+        
+        Args:
+            template: 模板字符串
+            state: 工作流状态
+        
+        Returns:
+            模板部分列表
+        """
+        import re
+        
+        parts = []
+        last_end = 0
+        
+        # 匹配 {{xxx}} 或 {{ xxx }} 格式（支持空格）
+        pattern = r'\{\{\s*([^}]+?)\s*\}\}'
+        
+        for match in re.finditer(pattern, template):
+            start, end = match.span()
+            
+            # 添加前面的静态文本
+            if start > last_end:
+                static_text = template[last_end:start]
+                if static_text:
+                    parts.append({"type": "static", "content": static_text})
+            
+            # 解析动态引用
+            ref = match.group(1).strip()
+            
+            # 检查是否是节点引用（如 llm.output 或 llm_qa.output）
+            if '.' in ref:
+                node_id, field = ref.split('.', 1)
+                parts.append({
+                    "type": "dynamic",
+                    "node_id": node_id,
+                    "field": field,
+                    "raw": ref
+                })
+            else:
+                # 其他引用（如 {{var.xxx}}），当作静态处理
+                # 直接渲染这部分
+                rendered = self._render_template(f"{{{{{ref}}}}}", state)
+                parts.append({"type": "static", "content": rendered})
+            
+            last_end = end
+        
+        # 添加最后的静态文本
+        if last_end < len(template):
+            static_text = template[last_end:]
+            if static_text:
+                parts.append({"type": "static", "content": static_text})
+        
+        return parts
+    
+    async def execute_stream(self, state: WorkflowState):
+        """流式执行 end 节点业务逻辑
+        
+        智能输出策略：
+        1. 检测模板中是否引用了直接上游节点
+        2. 如果引用了，只输出该引用**之后**的部分（后缀）
+        3. 前缀和引用内容已经在上游节点流式输出时发送了
+        
+        示例：'{{start.test}}hahaha {{ llm_qa.output }} lalalalala a'
+        - 直接上游节点是 llm_qa
+        - 前缀 '{{start.test}}hahaha ' 已在 LLM 节点流式输出前发送
+        - LLM 内容在 LLM 节点流式输出
+        - End 节点只输出 ' lalalalala a'（后缀，一次性输出）
+        
+        Args:
+            state: 工作流状态
+        
+        Yields:
+            完成标记
+        """
+        logger.info(f"节点 {self.node_id} (End) 开始执行（流式）")
+        
+        # 获取配置的输出模板
+        output_template = self.config.get("output")
+        
+        if not output_template:
+            output = "工作流已完成"
+            yield {"__final__": True, "result": output}
+            return
+        
+        # 找到直接上游节点
+        direct_upstream_nodes = []
+        for edge in self.workflow_config.get("edges", []):
+            if edge.get("target") == self.node_id:
+                source_node_id = edge.get("source")
+                direct_upstream_nodes.append(source_node_id)
+        
+        logger.info(f"节点 {self.node_id} 的直接上游节点: {direct_upstream_nodes}")
+        
+        # 解析模板部分
+        parts = self._parse_template_parts(output_template, state)
+        logger.info(f"节点 {self.node_id} 解析模板，共 {len(parts)} 个部分")
+        
+        # 找到第一个引用直接上游节点的动态引用
+        upstream_ref_index = None
+        for i, part in enumerate(parts):
+            if part["type"] == "dynamic" and part["node_id"] in direct_upstream_nodes:
+                upstream_ref_index = i
+                logger.info(f"节点 {self.node_id} 找到直接上游节点 {part['node_id']} 的引用，索引: {i}")
+                break
+        
+        if upstream_ref_index is None:
+            # 没有引用直接上游节点，正常输出（渲染完整模板）
+            output = self._render_template(output_template, state)
+            logger.info(f"节点 {self.node_id} 没有引用直接上游节点，输出完整内容")
+            yield {"__final__": True, "result": output}
+            return
+        
+        # 有引用直接上游节点，只输出该引用之后的部分（后缀）
+        logger.info(f"节点 {self.node_id} 检测到直接上游节点引用，只输出后缀部分（从索引 {upstream_ref_index + 1} 开始）")
+        
+        # 收集后缀部分
+        suffix_parts = []
+        for i in range(upstream_ref_index + 1, len(parts)):
+            part = parts[i]
+            
+            if part["type"] == "static":
+                # 静态文本
+                suffix_parts.append(part["content"])
+                
+            elif part["type"] == "dynamic":
+                # 其他动态引用（如果有多个引用）
+                node_id = part["node_id"]
+                field = part["field"]
+                
+                # 从 streaming_buffer 或 node_outputs 读取
+                streaming_buffer = state.get("streaming_buffer", {})
+                if node_id in streaming_buffer:
+                    buffer_data = streaming_buffer[node_id]
+                    content = buffer_data.get("full_content", "")
+                else:
+                    node_outputs = state.get("node_outputs", {})
+                    runtime_vars = state.get("runtime_vars", {})
+                    
+                    content = ""
+                    if node_id in node_outputs:
+                        node_output = node_outputs[node_id]
+                        if isinstance(node_output, dict):
+                            content = str(node_output.get(field, ""))
+                    elif node_id in runtime_vars:
+                        runtime_var = runtime_vars[node_id]
+                        if isinstance(runtime_var, dict):
+                            content = str(runtime_var.get(field, ""))
+                
+                suffix_parts.append(content)
+        
+        # 拼接后缀
+        suffix = "".join(suffix_parts)
+        
+        # 构建完整输出（用于返回，包含前缀 + 动态内容 + 后缀）
+        full_output = self._render_template(output_template, state)
+        
+        if suffix:
+            logger.info(f"节点 {self.node_id} 输出后缀: '{suffix[:50]}...' (长度: {len(suffix)})")
+            # 一次性输出后缀（作为单个 chunk）
+            # 注意：不要直接 yield 字符串，因为 base_node 会逐字符处理
+            # 而是通过 writer 直接发送
+            from langgraph.config import get_stream_writer
+            writer = get_stream_writer()
+            writer({
+                "type": "message",  # End 节点的输出使用 message 类型
+                "node_id": self.node_id,
+                "chunk": suffix,
+                "full_content": full_output,  # full_content 是完整的渲染结果（前缀+LLM+后缀）
+                "chunk_index": 1,
+                "is_suffix": True
+            })
+            logger.info(f"节点 {self.node_id} 已通过 writer 发送后缀，full_content 长度: {len(full_output)}")
+        else:
+            logger.info(f"节点 {self.node_id} 没有后缀需要输出")
+        
+        # 统计信息
+        node_outputs = state.get("node_outputs", {})
+        total_nodes = len(node_outputs)
+        
+        logger.info(f"节点 {self.node_id} (End) 执行完成（流式），共执行了 {total_nodes} 个节点")
+        
+        # yield 完成标记（包含完整输出）
+        yield {"__final__": True, "result": full_output}
diff --git a/api/app/core/workflow/nodes/llm/node.py b/api/app/core/workflow/nodes/llm/node.py
index cf665ff1..8f809923 100644
--- a/api/app/core/workflow/nodes/llm/node.py
+++ b/api/app/core/workflow/nodes/llm/node.py
@@ -63,7 +63,7 @@ class LLMNode(BaseNode):
     - ai/assistant: AI 消息（AIMessage）
     """
     
-    def _prepare_llm(self, state: WorkflowState) -> tuple[RedBearLLM, list | str]:
+    def _prepare_llm(self, state: WorkflowState,stream:bool = False) -> tuple[RedBearLLM, list | str]:
         """准备 LLM 实例（公共逻辑）
         
         Args:
@@ -125,16 +125,22 @@ class LLMNode(BaseNode):
             model_type = config.type
         
         # 4. 创建 LLM 实例（使用已提取的数据）
+        # 注意：对于流式输出，需要在模型初始化时设置 streaming=True
+        extra_params = {"streaming": stream} if stream else {}
+        
         llm = RedBearLLM(
             RedBearModelConfig(
                 model_name=model_name,
                 provider=provider,            
                 api_key=api_key,
-                base_url=api_base
+                base_url=api_base,
+                extra_params=extra_params
             ), 
             type=model_type
         )
         
+        logger.debug(f"创建 LLM 实例: provider={provider}, model={model_name}, streaming={stream}")
+        
         return llm, prompt_or_messages
     
     async def execute(self, state: WorkflowState) -> AIMessage:
@@ -146,13 +152,12 @@ class LLMNode(BaseNode):
         Returns:
             LLM 响应消息
         """
-        llm, prompt_or_messages = self._prepare_llm(state)
+        llm, prompt_or_messages = self._prepare_llm(state,True)
         
         logger.info(f"节点 {self.node_id} 开始执行 LLM 调用（非流式）")
         
         # 调用 LLM（支持字符串或消息列表）
         response = await llm.ainvoke(prompt_or_messages)
-        
         # 提取内容
         if hasattr(response, 'content'):
             content = response.content
@@ -208,13 +213,43 @@ class LLMNode(BaseNode):
         Yields:
             文本片段（chunk）或完成标记
         """
-        llm, prompt_or_messages = self._prepare_llm(state)
+        from langgraph.config import get_stream_writer
+        
+        llm, prompt_or_messages = self._prepare_llm(state, True)
         
         logger.info(f"节点 {self.node_id} 开始执行 LLM 调用（流式）")
+        logger.debug(f"LLM 配置: streaming={getattr(llm._model, 'streaming', 'unknown')}")
+        
+        # 检查是否有注入的 End 节点前缀配置
+        writer = get_stream_writer()
+        end_prefix = getattr(self, '_end_node_prefix', None)
+        
+        logger.info(f"[LLM前缀] 节点 {self.node_id} 检查前缀配置: {end_prefix is not None}")
+        if end_prefix:
+            logger.info(f"[LLM前缀] 前缀内容: '{end_prefix}'")
+        
+        if end_prefix:
+            # 渲染前缀（可能包含其他变量）
+            try:
+                rendered_prefix = self._render_template(end_prefix, state)
+                logger.info(f"节点 {self.node_id} 提前发送 End 节点前缀: '{rendered_prefix[:50]}...'")
+                
+                # 提前发送 End 节点的前缀（使用 "message" 类型）
+                writer({
+                    "type": "message",  # End 相关的内容都是 message 类型
+                    "node_id": "end",  # 标记为 end 节点的输出
+                    "chunk": rendered_prefix,
+                    "full_content": rendered_prefix,
+                    "chunk_index": 0,
+                    "is_prefix": True  # 标记这是前缀
+                })
+            except Exception as e:
+                logger.warning(f"渲染/发送 End 节点前缀失败: {e}")
         
         # 累积完整响应
         full_response = ""
         last_chunk = None
+        chunk_count = 0
         
         # 调用 LLM（流式，支持字符串或消息列表）
         async for chunk in llm.astream(prompt_or_messages):
@@ -224,13 +259,16 @@ class LLMNode(BaseNode):
             else:
                 content = str(chunk)
             
-            full_response += content
-            last_chunk = chunk
-            
-            # 流式返回每个文本片段
-            yield content
+            # 只有当内容不为空时才处理
+            if content:
+                full_response += content
+                last_chunk = chunk
+                chunk_count += 1
+                
+                # 流式返回每个文本片段
+                yield content
         
-        logger.info(f"节点 {self.node_id} LLM 调用完成，输出长度: {len(full_response)}")
+        logger.info(f"节点 {self.node_id} LLM 调用完成，输出长度: {len(full_response)}, 总 chunks: {chunk_count}")
         
         # 构建完整的 AIMessage（包含元数据）
         if isinstance(last_chunk, AIMessage):
diff --git a/api/app/services/llm_router.py b/api/app/services/llm_router.py
index 089f2c07..9ef9dbb1 100644
--- a/api/app/services/llm_router.py
+++ b/api/app/services/llm_router.py
@@ -385,7 +385,7 @@ class LLMRouter:
             # 获取 API Key 配置
             api_key_config = self.db.query(ModelApiKey).filter(
                 ModelApiKey.model_config_id == self.routing_model_config.id,
-                ModelApiKey.is_active == True
+                ModelApiKey.is_active
             ).first()
             
             if not api_key_config:
diff --git a/api/app/services/workflow_service.py b/api/app/services/workflow_service.py
index fbf09505..ccf0442f 100644
--- a/api/app/services/workflow_service.py
+++ b/api/app/services/workflow_service.py
@@ -1,29 +1,28 @@
 """
 工作流服务层
 """
+import datetime
 import json
 import logging
 import uuid
 import datetime
 from typing import Any, Annotated, AsyncGenerator
 
-from sqlalchemy.orm import Session
 from fastapi import Depends
+from sqlalchemy.orm import Session
 
+from app.core.error_codes import BizCode
+from app.core.exceptions import BusinessException
+from app.core.workflow.validator import validate_workflow_config
+from app.db import get_db
 from app.models.workflow_model import WorkflowConfig, WorkflowExecution
 from app.repositories.workflow_repository import (
     WorkflowConfigRepository,
     WorkflowExecutionRepository,
-    WorkflowNodeExecutionRepository,
-    get_workflow_config_repository,
-    get_workflow_execution_repository,
-    get_workflow_node_execution_repository
+    WorkflowNodeExecutionRepository
 )
-from app.core.workflow.validator import validate_workflow_config
-from app.core.exceptions import BusinessException
-from app.core.error_codes import BizCode
-from app.db import get_db
 from app.schemas import DraftRunRequest
+from app.utils.sse_utils import format_sse_message
 
 logger = logging.getLogger(__name__)
 
@@ -195,8 +194,7 @@ class WorkflowService:
         config = self.get_workflow_config(app_id)
         if not config:
             return False
-
-        self.config_repo.delete(config.id)
+        config.is_active = False
         logger.info(f"删除工作流配置成功: app_id={app_id}, config_id={config.id}")
         return True
 
@@ -474,11 +472,9 @@ class WorkflowService:
         }
 
         # 4. 获取工作空间 ID（从 app 获取）
-        from app.models import App
-
 
         # 5. 执行工作流
-        from app.core.workflow.executor import execute_workflow, execute_workflow_stream
+        from app.core.workflow.executor import execute_workflow
 
         try:
             # 更新状态为运行中
@@ -595,19 +591,14 @@ class WorkflowService:
         }
 
         # 4. 获取工作空间 ID（从 app 获取）
-        from app.models import App
 
         # 5. 流式执行工作流
-        from app.core.workflow.executor import execute_workflow, execute_workflow_stream
 
         try:
             # 更新状态为运行中
             self.update_execution_status(execution.execution_id, "running")
 
-            # 发送开始事件
-            yield f"data: {json.dumps({'type': 'workflow_start', 'execution_id': execution.execution_id})}\n\n"
-
-            # 调用流式执行
+            # 调用流式执行（executor 会发送 workflow_start 和 workflow_end 事件）
             async for event in self._run_workflow_stream(
                 workflow_config=workflow_config_dict,
                 input_data=input_data,
@@ -615,13 +606,8 @@ class WorkflowService:
                 workspace_id="",
                 user_id=payload.user_id
             ):
-                # 清理事件数据，移除不可序列化的对象
-                cleaned_event = self._clean_event_for_json(event)
-                # 转换为 SSE 格式
-                yield f"data: {json.dumps(cleaned_event)}\n\n"
-
-            # 发送完成事件
-            yield f"data: {json.dumps({'type': 'workflow_end', 'execution_id': execution.execution_id})}\n\n"
+                # 直接转发 executor 的事件（已经是正确的格式）
+                yield event
 
         except Exception as e:
             logger.error(f"工作流流式执行失败: execution_id={execution.execution_id}, error={e}", exc_info=True)
@@ -631,7 +617,13 @@ class WorkflowService:
                 error_message=str(e)
             )
             # 发送错误事件
-            yield f"data: {json.dumps({'type': 'error', 'execution_id': execution.execution_id, 'error': str(e)})}\n\n"
+            yield {
+                "event": "error",
+                "data": {
+                    "execution_id": execution.execution_id,
+                    "error": str(e)
+                }
+            }
 
     async def run_workflow(
         self,
@@ -692,7 +684,7 @@ class WorkflowService:
             )
 
         # 5. 执行工作流
-        from app.core.workflow.executor import execute_workflow, execute_workflow_stream
+        from app.core.workflow.executor import execute_workflow
 
         try:
             # 更新状态为运行中
@@ -802,13 +794,11 @@ class WorkflowService:
             user_id: 用户 ID
 
         Yields:
-            流式事件
+            流式事件（格式：{"event": "<type>", "data": {...}}）
         """
         from app.core.workflow.executor import execute_workflow_stream
 
         try:
-            output_data = {}
-
             async for event in execute_workflow_stream(
                 workflow_config=workflow_config,
                 input_data=input_data,
@@ -816,31 +806,9 @@ class WorkflowService:
                 workspace_id=workspace_id,
                 user_id=user_id
             ):
-                # 转发事件
+                # 直接转发事件（executor 已经返回正确格式）
                 yield event
 
-                # 收集输出数据
-                if event.get("type") == "node_complete":
-                    node_data = event.get("data", {})
-                    node_outputs = node_data.get("node_outputs", {})
-                    output_data.update(node_outputs)
-
-                # 处理完成事件
-                if event.get("type") == "workflow_complete":
-                    self.update_execution_status(
-                        execution_id,
-                        "completed",
-                        output_data=output_data
-                    )
-
-                # 处理错误事件
-                if event.get("type") == "workflow_error":
-                    self.update_execution_status(
-                        execution_id,
-                        "failed",
-                        error_message=event.get("error")
-                    )
-
         except Exception as e:
             logger.error(f"工作流流式执行失败: execution_id={execution_id}, error={e}", exc_info=True)
             self.update_execution_status(
@@ -849,9 +817,11 @@ class WorkflowService:
                 error_message=str(e)
             )
             yield {
-                "type": "workflow_error",
-                "execution_id": execution_id,
-                "error": str(e)
+                "event": "error",
+                "data": {
+                    "execution_id": execution_id,
+                    "error": str(e)
+                }
             }