diff --git a/api/app/controllers/app_controller.py b/api/app/controllers/app_controller.py
index 2300f148..f55ea5b5 100644
--- a/api/app/controllers/app_controller.py
+++ b/api/app/controllers/app_controller.py
@@ -60,14 +60,14 @@ def list_apps(
     """
     workspace_id = current_user.current_workspace_id
     service = app_service.AppService(db)
-    
+
     # 当 ids 存在且不为 None 时，根据 ids 获取应用
     if ids is not None:
         app_ids = [id.strip() for id in ids.split(',') if id.strip()]
         items_orm = app_service.get_apps_by_ids(db, app_ids, workspace_id)
         items = [service._convert_to_schema(app, workspace_id) for app in items_orm]
         return success(data=items)
-    
+
     # 正常分页查询
     items_orm, total = app_service.list_apps(
         db,
diff --git a/api/app/core/memory/storage_services/forgetting_engine/access_history_manager.py b/api/app/core/memory/storage_services/forgetting_engine/access_history_manager.py
index 913874f1..1a2e3cbc 100644
--- a/api/app/core/memory/storage_services/forgetting_engine/access_history_manager.py
+++ b/api/app/core/memory/storage_services/forgetting_engine/access_history_manager.py
@@ -620,34 +620,52 @@ class AccessHistoryManager:
             new_version = current_version + 1
             
             # 步骤2：使用乐观锁更新节点
-            # 只有当版本号匹配时才更新
-            update_query = f"""
-            MATCH (n:{node_label} {{id: $node_id}})
-            """
+            # 根据节点类型构建完整的查询语句
+            content_field_map = {
+                'Statement': 'n.statement as statement',
+                'MemorySummary': 'n.content as content',
+                'ExtractedEntity': 'null as content_placeholder'  # 占位符，后续会被过滤
+            }
+            
+            # 显式检查节点类型，不支持的类型抛出错误
+            if node_label not in content_field_map:
+                raise ValueError(
+                    f"Unsupported node_label: {node_label}. "
+                    f"Supported labels are: {list(content_field_map.keys())}"
+                )
+            
+            content_field = content_field_map[node_label]
+            
+            # 构建 WHERE 子句
+            where_conditions = []
             if group_id:
-                update_query += " WHERE n.group_id = $group_id"
+                where_conditions.append("n.group_id = $group_id")
             
             # 添加版本检查
             if current_version > 0:
-                update_query += " AND n.version = $current_version"
+                where_conditions.append("n.version = $current_version")
             else:
-                # 如果节点没有版本号，检查是否为首次更新
-                update_query += " AND (n.version IS NULL OR n.version = 0)"
+                where_conditions.append("(n.version IS NULL OR n.version = 0)")
             
-            update_query += """
+            where_clause = " AND ".join(where_conditions) if where_conditions else "true"
+            
+            # 构建完整的更新查询
+            update_query = f"""
+            MATCH (n:{node_label} {{id: $node_id}})
+            WHERE {where_clause}
             SET n.activation_value = $activation_value,
                 n.access_history = $access_history,
                 n.last_access_time = $last_access_time,
                 n.access_count = $access_count,
                 n.version = $new_version
             RETURN n.id as id,
-                   n.statement as statement,
                    n.activation_value as activation_value,
                    n.access_history as access_history,
                    n.last_access_time as last_access_time,
                    n.access_count as access_count,
                    n.importance_score as importance_score,
-                   n.version as version
+                   n.version as version,
+                   {content_field}
             """
             
             update_params = {
@@ -671,7 +689,11 @@ class AccessHistoryManager:
                     f"Expected version {current_version}, but node was modified by another transaction."
                 )
             
-            return dict(updated_node)
+            # 转换为字典并移除占位符字段
+            result_dict = dict(updated_node)
+            result_dict.pop('content_placeholder', None)
+            
+            return result_dict
         
         # 执行事务
         try:
diff --git a/api/app/core/workflow/executor.py b/api/app/core/workflow/executor.py
index e3d634d8..67689935 100644
--- a/api/app/core/workflow/executor.py
+++ b/api/app/core/workflow/executor.py
@@ -3,13 +3,11 @@
 
 基于 LangGraph 的工作流执行引擎。
 """
-
-# import uuid
 import datetime
 import logging
+import uuid
 from typing import Any
 
-from langchain_core.messages import HumanMessage
 from langgraph.graph.state import CompiledStateGraph
 
 from app.core.workflow.graph_builder import GraphBuilder
@@ -55,6 +53,12 @@ class WorkflowExecutor:
         self.edges = workflow_config.get("edges", [])
         self.execution_config = workflow_config.get("execution_config", {})
 
+        self.checkpoint_config = {
+            "configurable": {
+                "thread_id": uuid.uuid4(),
+            }
+        }
+
     def _prepare_initial_state(self, input_data: dict[str, Any]) -> WorkflowState:
         """准备初始状态（注入系统变量和会话变量）
 
@@ -95,7 +99,7 @@ class WorkflowExecutor:
                             case VariableType.ARRAY_NUMBER | VariableType.ARRAY_OBJECT | VariableType.ARRAY_BOOLEAN | VariableType.ARRAY_STRING:
                                 conversation_vars[var_name] = []
         input_variables = input_data.get("variables") or {}  # Start 节点的自定义变量
-
+        conversation_vars = conversation_vars | input_data.get("conv", {})
         # 构建分层的变量结构
         variables = {
             "sys": {
@@ -110,7 +114,7 @@ class WorkflowExecutor:
         }
 
         return {
-            "messages": [HumanMessage(content=user_message)],
+            "messages": [('user', user_message)],
             "variables": variables,
             "node_outputs": {},
             "runtime_vars": {},  # 运行时节点变量（简化版，供快速访问）
@@ -196,6 +200,28 @@ class WorkflowExecutor:
         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_final_output(self, result, elapsed_time):
+        node_outputs = result.get("node_outputs", {})
+        final_output = self._extract_final_output(node_outputs)
+        token_usage = self._aggregate_token_usage(node_outputs)
+        conversation_id = None
+        for node_id, node_output in node_outputs.items():
+            if node_output.get("node_type") == "start":
+                conversation_id = node_output.get("output", {}).get("conversation_id")
+                break
+
+        return {
+            "status": "completed",
+            "output": final_output,
+            "node_outputs": node_outputs,
+            "messages": result.get("messages", []),
+            "conversation_id": conversation_id,
+            "elapsed_time": elapsed_time,
+            "token_usage": token_usage,
+            "error": result.get("error"),
+            "variables": result.get("variables", {}),
+        }
+
     def build_graph(self, stream=False) -> CompiledStateGraph:
         """构建 LangGraph
 
@@ -236,40 +262,16 @@ class WorkflowExecutor:
 
         # 3. 执行工作流
         try:
-            result = await graph.ainvoke(initial_state)
+
+            result = await graph.ainvoke(initial_state, config=self.checkpoint_config)
 
             # 计算耗时
             end_time = datetime.datetime.now()
             elapsed_time = (end_time - start_time).total_seconds()
 
-            # 提取节点输出（现在包含 start 和 end 节点）
-            node_outputs = result.get("node_outputs", {})
-
-            # 提取最终输出（从最后一个非 start/end 节点）
-            final_output = self._extract_final_output(node_outputs)
-
-            # 聚合 token 使用情况
-            token_usage = self._aggregate_token_usage(node_outputs)
-
-            # 提取 conversation_id（从 start 节点输出）
-            conversation_id = None
-            for node_id, node_output in node_outputs.items():
-                if node_output.get("node_type") == "start":
-                    conversation_id = node_output.get("output", {}).get("conversation_id")
-                    break
-
             logger.info(f"工作流执行完成: execution_id={self.execution_id}, elapsed_time={elapsed_time:.2f}s")
 
-            return {
-                "status": "completed",
-                "output": final_output,
-                "node_outputs": node_outputs,
-                "messages": result.get("messages", []),
-                "conversation_id": conversation_id,
-                "elapsed_time": elapsed_time,
-                "token_usage": token_usage,
-                "error": result.get("error")
-            }
+            return self._build_final_output(result, elapsed_time)
 
         except Exception as e:
             # 计算耗时（即使失败也记录）
@@ -331,11 +333,11 @@ class WorkflowExecutor:
         # 3. Execute workflow
         try:
             chunk_count = 0
-            final_state = None
 
             async for event in graph.astream(
                     initial_state,
                     stream_mode=["updates", "debug", "custom"],  # Use updates + debug + custom mode
+                    config=self.checkpoint_config
             ):
                 # event should be a tuple: (mode, data)
                 # But let's handle both cases
@@ -411,12 +413,11 @@ class WorkflowExecutor:
                 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()
-
+            result = graph.get_state(self.checkpoint_config).values
             logger.info(
                 f"Workflow execution completed (streaming), "
                 f"total chunks: {chunk_count}, elapsed: {elapsed_time:.2f}s"
@@ -425,12 +426,7 @@ class WorkflowExecutor:
             # 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()
-                }
+                "data": self._build_final_output(result, elapsed_time)
             }
 
         except Exception as e:
diff --git a/api/app/core/workflow/graph_builder.py b/api/app/core/workflow/graph_builder.py
index 69ed3b6a..b75b867e 100644
--- a/api/app/core/workflow/graph_builder.py
+++ b/api/app/core/workflow/graph_builder.py
@@ -4,6 +4,7 @@ from typing import Any
 
 from langgraph.graph.state import CompiledStateGraph, StateGraph
 from langgraph.graph import START, END
+from langgraph.checkpoint.memory import InMemorySaver
 
 from app.core.workflow.expression_evaluator import evaluate_condition
 from app.core.workflow.nodes import WorkflowState, NodeFactory
@@ -249,4 +250,5 @@ class GraphBuilder:
         self.graph = StateGraph(WorkflowState)
         self.add_nodes()
         self.add_edges()  # 添加边必须在添加节点之后
-        return self.graph.compile()
+        checkpointer = InMemorySaver()
+        return self.graph.compile(checkpointer=checkpointer)
diff --git a/api/app/core/workflow/nodes/assigner/node.py b/api/app/core/workflow/nodes/assigner/node.py
index 7b9d645b..96f68ce8 100644
--- a/api/app/core/workflow/nodes/assigner/node.py
+++ b/api/app/core/workflow/nodes/assigner/node.py
@@ -14,7 +14,7 @@ logger = logging.getLogger(__name__)
 class AssignerNode(BaseNode):
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = AssignerNodeConfig(**self.config)
+        self.typed_config: AssignerNodeConfig | None = None
 
     async def execute(self, state: WorkflowState) -> Any:
         """
@@ -28,6 +28,7 @@ class AssignerNode(BaseNode):
             None or the result of the assignment operation.
         """
         # Initialize a variable pool for accessing conversation, node, and system variables
+        self.typed_config = AssignerNodeConfig(**self.config)
         logger.info(f"节点 {self.node_id} 开始执行")
         pool = VariablePool(state)
         for assignment in self.typed_config.assignments:
diff --git a/api/app/core/workflow/nodes/base_node.py b/api/app/core/workflow/nodes/base_node.py
index 727f7391..e3bf36c9 100644
--- a/api/app/core/workflow/nodes/base_node.py
+++ b/api/app/core/workflow/nodes/base_node.py
@@ -25,7 +25,7 @@ class WorkflowState(TypedDict):
     The state object passed between nodes in a workflow, containing messages, variables, node outputs, etc.
     """
     # List of messages (append mode)
-    messages: Annotated[list[AnyMessage], add]
+    messages: Annotated[list[tuple[str, str]], add]
 
     # Set of loop node IDs, used for assigning values in loop nodes
     cycle_nodes: list
@@ -203,6 +203,7 @@ class BaseNode(ABC):
             # 返回包装后的输出和运行时变量
             return {
                 **wrapped_output,
+                "variables": state["variables"],
                 "runtime_vars": {
                     self.node_id: runtime_var
                 },
@@ -355,6 +356,7 @@ class BaseNode(ABC):
             # Build complete state update (including node_outputs, runtime_vars, and final streaming buffer)
             state_update = {
                 **final_output,
+                "variables": state["variables"],
                 "runtime_vars": {
                     self.node_id: runtime_var
                 },
diff --git a/api/app/core/workflow/nodes/cycle_graph/node.py b/api/app/core/workflow/nodes/cycle_graph/node.py
index fb062f39..1659395e 100644
--- a/api/app/core/workflow/nodes/cycle_graph/node.py
+++ b/api/app/core/workflow/nodes/cycle_graph/node.py
@@ -30,7 +30,6 @@ class CycleGraphNode(BaseNode):
 
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config: LoopNodeConfig | IterationNodeConfig | None = None
 
         self.cycle_nodes = list()  # Nodes belonging to this cycle
         self.cycle_edges = list()  # Edges connecting nodes within the cycle
diff --git a/api/app/core/workflow/nodes/http_request/node.py b/api/app/core/workflow/nodes/http_request/node.py
index 2e5de796..141cba79 100644
--- a/api/app/core/workflow/nodes/http_request/node.py
+++ b/api/app/core/workflow/nodes/http_request/node.py
@@ -32,7 +32,7 @@ class HttpRequestNode(BaseNode):
 
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = HttpRequestNodeConfig(**self.config)
+        self.typed_config: HttpRequestNodeConfig | None = None
 
     def _build_timeout(self) -> Timeout:
         """
@@ -181,6 +181,7 @@ class HttpRequestNode(BaseNode):
             - dict: Serialized HttpRequestNodeOutput on success
             - str: Branch identifier (e.g. "ERROR") when branching is enabled
         """
+        self.typed_config = HttpRequestNodeConfig(**self.config)
         async with httpx.AsyncClient(
                 verify=self.typed_config.verify_ssl,
                 timeout=self._build_timeout(),
diff --git a/api/app/core/workflow/nodes/if_else/node.py b/api/app/core/workflow/nodes/if_else/node.py
index 8c6d222f..41f1138b 100644
--- a/api/app/core/workflow/nodes/if_else/node.py
+++ b/api/app/core/workflow/nodes/if_else/node.py
@@ -13,7 +13,7 @@ logger = logging.getLogger(__name__)
 class IfElseNode(BaseNode):
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = IfElseNodeConfig(**self.config)
+        self.typed_config: IfElseNodeConfig | None= None
 
     @staticmethod
     def _evaluate(operator, instance: CompareOperatorInstance) -> Any:
@@ -109,6 +109,7 @@ class IfElseNode(BaseNode):
         Returns:
             str: The matched branch identifier, e.g., 'CASE1', 'CASE2', ..., used for node transitions.
         """
+        self.typed_config = IfElseNodeConfig(**self.config)
         expressions = self.evaluate_conditional_edge_expressions(state)
         # TODO: 变量类型及文本类型解析
         for i in range(len(expressions)):
diff --git a/api/app/core/workflow/nodes/jinja_render/node.py b/api/app/core/workflow/nodes/jinja_render/node.py
index 70993573..822f1918 100644
--- a/api/app/core/workflow/nodes/jinja_render/node.py
+++ b/api/app/core/workflow/nodes/jinja_render/node.py
@@ -12,7 +12,7 @@ logger = logging.getLogger(__name__)
 class JinjaRenderNode(BaseNode):
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = JinjaRenderNodeConfig(**self.config)
+        self.typed_config: JinjaRenderNodeConfig | None = None
 
     async def execute(self, state: WorkflowState) -> Any:
         """
@@ -34,6 +34,7 @@ class JinjaRenderNode(BaseNode):
             RuntimeError: If Jinja2 template rendering fails due to invalid template
                 syntax or missing variables.
         """
+        self.typed_config = JinjaRenderNodeConfig(**self.config)
         render = TemplateRenderer(strict=False)
 
         context = {}
diff --git a/api/app/core/workflow/nodes/knowledge/config.py b/api/app/core/workflow/nodes/knowledge/config.py
index 9d307216..5475636e 100644
--- a/api/app/core/workflow/nodes/knowledge/config.py
+++ b/api/app/core/workflow/nodes/knowledge/config.py
@@ -44,8 +44,8 @@ class KnowledgeRetrievalNodeConfig(BaseNodeConfig):
         description="Knowledge base config"
     )
 
-    reranker_id: UUID = Field(
-        default="",
+    reranker_id: UUID | None = Field(
+        default=None,
         description="Reranker top k"
     )
 
diff --git a/api/app/core/workflow/nodes/knowledge/node.py b/api/app/core/workflow/nodes/knowledge/node.py
index 061328e1..221ca079 100644
--- a/api/app/core/workflow/nodes/knowledge/node.py
+++ b/api/app/core/workflow/nodes/knowledge/node.py
@@ -21,7 +21,7 @@ logger = logging.getLogger(__name__)
 class KnowledgeRetrievalNode(BaseNode):
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = KnowledgeRetrievalNodeConfig(**self.config)
+        self.typed_config: KnowledgeRetrievalNodeConfig | None = None
 
     @staticmethod
     def _build_kb_filter(kb_ids: list[uuid.UUID], permission: knowledge_model.PermissionType):
@@ -171,6 +171,7 @@ class KnowledgeRetrievalNode(BaseNode):
         Raises:
             RuntimeError: If no valid knowledge base is found or access is denied.
         """
+        self.typed_config = KnowledgeRetrievalNodeConfig(**self.config)
         query = self._render_template(self.typed_config.query, state)
         with get_db_read() as db:
             knowledge_bases = self.typed_config.knowledge_bases
diff --git a/api/app/core/workflow/nodes/llm/node.py b/api/app/core/workflow/nodes/llm/node.py
index 5fb86ae2..6395d3b8 100644
--- a/api/app/core/workflow/nodes/llm/node.py
+++ b/api/app/core/workflow/nodes/llm/node.py
@@ -68,7 +68,7 @@ class LLMNode(BaseNode):
 
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = LLMNodeConfig(**self.config)
+        self.typed_config: LLMNodeConfig | None = None
 
     def _render_context(self, message, state):
         context = f"<context>{self._render_template(self.typed_config.context, state)}</context>"
@@ -164,6 +164,7 @@ class LLMNode(BaseNode):
         Returns:
             LLM 响应消息
         """
+        self.typed_config = LLMNodeConfig(**self.config)
         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）")
diff --git a/api/app/core/workflow/nodes/memory/node.py b/api/app/core/workflow/nodes/memory/node.py
index 0d1b1fb4..f1c99ddb 100644
--- a/api/app/core/workflow/nodes/memory/node.py
+++ b/api/app/core/workflow/nodes/memory/node.py
@@ -10,9 +10,10 @@ from app.services.memory_agent_service import MemoryAgentService
 class MemoryReadNode(BaseNode):
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = MemoryReadNodeConfig(**self.config)
+        self.typed_config: MemoryReadNodeConfig | None = None
 
     async def execute(self, state: WorkflowState) -> Any:
+        self.typed_config = MemoryReadNodeConfig(**self.config)
         with get_db_read() as db:
             workspace_id = self.get_variable('sys.workspace_id', state)
             end_user_id = self.get_variable("sys.user_id", state)
diff --git a/api/app/core/workflow/nodes/parameter_extractor/node.py b/api/app/core/workflow/nodes/parameter_extractor/node.py
index 84d61aa9..ec58d96c 100644
--- a/api/app/core/workflow/nodes/parameter_extractor/node.py
+++ b/api/app/core/workflow/nodes/parameter_extractor/node.py
@@ -22,7 +22,7 @@ logger = logging.getLogger(__name__)
 class ParameterExtractorNode(BaseNode):
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = ParameterExtractorNodeConfig(**self.config)
+        self.typed_config: ParameterExtractorNodeConfig | None = None
 
     @staticmethod
     def _get_prompt():
@@ -145,6 +145,7 @@ class ParameterExtractorNode(BaseNode):
         Raises:
             BusinessException: If LLM output cannot be parsed as valid JSON.
         """
+        self.typed_config = ParameterExtractorNodeConfig(**self.config)
         llm = self._get_llm_instance()
         system_prompt, user_prompt = self._get_prompt()
 
diff --git a/api/app/core/workflow/nodes/question_classifier/node.py b/api/app/core/workflow/nodes/question_classifier/node.py
index b0f2c28d..aee72eda 100644
--- a/api/app/core/workflow/nodes/question_classifier/node.py
+++ b/api/app/core/workflow/nodes/question_classifier/node.py
@@ -21,8 +21,8 @@ class QuestionClassifierNode(BaseNode):
     
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = QuestionClassifierNodeConfig(**self.config)
-        self.category_to_case_map = self._build_category_case_map()
+        self.typed_config: QuestionClassifierNodeConfig | None = None
+        self.category_to_case_map = {}
     
     def _get_llm_instance(self) -> RedBearLLM:
         """获取LLM实例"""
@@ -67,6 +67,8 @@ class QuestionClassifierNode(BaseNode):
     
     async def execute(self, state: WorkflowState) -> dict:
         """执行问题分类"""
+        self.typed_config = QuestionClassifierNodeConfig(**self.config)
+        self.category_to_case_map = self._build_category_case_map()
         question = self.typed_config.input_variable
         supplement_prompt = self.typed_config.user_supplement_prompt or ""
         categories = self.typed_config.categories or []
diff --git a/api/app/core/workflow/nodes/start/node.py b/api/app/core/workflow/nodes/start/node.py
index 7c3a2fca..69560422 100644
--- a/api/app/core/workflow/nodes/start/node.py
+++ b/api/app/core/workflow/nodes/start/node.py
@@ -7,6 +7,7 @@ Start 节点实现
 import logging
 from typing import Any
 
+from app.core.workflow.nodes.base_config import VariableType
 from app.core.workflow.nodes.base_node import BaseNode, WorkflowState
 from app.core.workflow.nodes.start.config import StartNodeConfig
 
@@ -34,7 +35,7 @@ class StartNode(BaseNode):
         super().__init__(node_config, workflow_config)
 
         # 解析并验证配置
-        self.typed_config = StartNodeConfig(**self.config)
+        self.typed_config: StartNodeConfig | None = None
 
     async def execute(self, state: WorkflowState) -> dict[str, Any]:
         """执行 start 节点业务逻辑
@@ -47,6 +48,7 @@ class StartNode(BaseNode):
         Returns:
             包含系统参数、会话变量和自定义变量的字典
         """
+        self.typed_config = StartNodeConfig(**self.config)
         logger.info(f"节点 {self.node_id} (Start) 开始执行")
 
         # 创建变量池实例（在方法内复用）
@@ -113,6 +115,18 @@ class StartNode(BaseNode):
                 logger.debug(
                     f"变量 '{var_name}' 使用默认值: {var_def.default}"
                 )
+            else:
+                match var_def.type:
+                    case VariableType.STRING:
+                        processed[var_name] = ""
+                    case VariableType.NUMBER:
+                        processed[var_name] = 0
+                    case VariableType.OBJECT:
+                        processed[var_name] = {}
+                    case VariableType.BOOLEAN:
+                        processed[var_name] = False
+                    case VariableType.ARRAY_NUMBER | VariableType.ARRAY_OBJECT | VariableType.ARRAY_BOOLEAN | VariableType.ARRAY_STRING:
+                        processed[var_name] = []
 
         return processed
 
diff --git a/api/app/core/workflow/nodes/tool/node.py b/api/app/core/workflow/nodes/tool/node.py
index 496812a6..3e79b075 100644
--- a/api/app/core/workflow/nodes/tool/node.py
+++ b/api/app/core/workflow/nodes/tool/node.py
@@ -19,10 +19,11 @@ class ToolNode(BaseNode):
     
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = ToolNodeConfig(**self.config)
+        self.typed_config: ToolNodeConfig | None = None
     
     async def execute(self, state: WorkflowState) -> dict[str, Any]:
         """执行工具"""
+        self.typed_config = ToolNodeConfig(**self.config)
         # 获取租户ID和用户ID
         tenant_id = self.get_variable("sys.tenant_id", state)
         user_id = self.get_variable("sys.user_id", state)
diff --git a/api/app/core/workflow/nodes/variable_aggregator/node.py b/api/app/core/workflow/nodes/variable_aggregator/node.py
index e6cbf75b..5bff8e33 100644
--- a/api/app/core/workflow/nodes/variable_aggregator/node.py
+++ b/api/app/core/workflow/nodes/variable_aggregator/node.py
@@ -12,7 +12,7 @@ logger = logging.getLogger(__name__)
 class VariableAggregatorNode(BaseNode):
     def __init__(self, node_config: dict[str, Any], workflow_config: dict[str, Any]):
         super().__init__(node_config, workflow_config)
-        self.typed_config = VariableAggregatorNodeConfig(**self.config)
+        self.typed_config: VariableAggregatorNodeConfig | None = None
 
     @staticmethod
     def _get_express(variable_string: str) -> Any:
@@ -37,6 +37,7 @@ class VariableAggregatorNode(BaseNode):
             - str: In non-group mode, returns the first non-None variable value.
             - dict: In group mode, returns a mapping of group_name -> first non-None variable value.
         """
+        self.typed_config = VariableAggregatorNodeConfig(**self.config)
         if not self.typed_config.group:
             # --------------------------
             # Non-group mode
diff --git a/api/app/repositories/neo4j/graph_search.py b/api/app/repositories/neo4j/graph_search.py
index 1549ef86..80756793 100644
--- a/api/app/repositories/neo4j/graph_search.py
+++ b/api/app/repositories/neo4j/graph_search.py
@@ -66,24 +66,38 @@ async def _update_activation_values_batch(
         max_retries=max_retries
     )
     
-    # 提取节点ID列表
-    node_ids = [node.get('id') for node in nodes if node.get('id')]
+    # 提取节点ID列表并去重（保持原始顺序）
+    seen_ids = set()
+    unique_node_ids = []
+    for node in nodes:
+        node_id = node.get('id')
+        if node_id and node_id not in seen_ids:
+            seen_ids.add(node_id)
+            unique_node_ids.append(node_id)
     
-    if not node_ids:
+    if not unique_node_ids:
         logger.warning(f"批量更新激活值：没有有效的节点ID")
         return nodes
+
+    # 记录去重信息（仅针对具有有效 ID 的节点）
+    id_nodes_count = sum(1 for n in nodes if n.get("id"))
+    if len(unique_node_ids) < id_nodes_count:
+        logger.info(
+            f"批量更新激活值：检测到重复节点，具有有效ID的节点数量={id_nodes_count}, "
+            f"去重后唯一ID数量={len(unique_node_ids)}"
+        )
     
     # 批量记录访问
     try:
         updated_nodes = await access_manager.record_batch_access(
-            node_ids=node_ids,
+            node_ids=unique_node_ids,
             node_label=node_label,
             group_id=group_id
         )
         
         logger.info(
             f"批量更新激活值成功: {node_label}, "
-            f"更新数量={len(updated_nodes)}/{len(node_ids)}"
+            f"更新数量={len(updated_nodes)}/{len(unique_node_ids)}"
         )
         
         return updated_nodes
@@ -153,19 +167,38 @@ async def _update_search_results_activation(
             original_nodes = results[key]
             updated_nodes = update_result
             
-            # 创建 ID 到原始节点的映射（用于快速查找 score）
-            original_map = {node.get('id'): node for node in original_nodes if node.get('id')}
+            # 创建 ID 到更新节点的映射（用于快速查找激活值数据）
+            updated_map = {node.get('id'): node for node in updated_nodes if node.get('id')}
             
-            # 合并数据：激活值来自更新结果，score 来自原始结果
+            # 合并数据：保留所有原始节点（包括重复的），用更新后的激活值数据填充
             merged_nodes = []
-            for updated_node in updated_nodes:
-                node_id = updated_node.get('id')
-                if node_id and node_id in original_map:
-                    # 保留原始的 score 字段
-                    original_score = original_map[node_id].get('score')
-                    if original_score is not None:
-                        updated_node['score'] = original_score
-                merged_nodes.append(updated_node)
+            for original_node in original_nodes:
+                node_id = original_node.get('id')
+                if node_id and node_id in updated_map:
+                    # 从原始节点开始，用更新后的激活值数据覆盖
+                    merged_node = original_node.copy()
+                    
+                    # 更新激活值相关字段
+                    activation_fields = {
+                        'activation_value',
+                        'access_history',
+                        'last_access_time',
+                        'access_count',
+                        'importance_score',
+                        'version',
+                        'statement',  # Statement 节点的内容字段
+                        'content'     # MemorySummary 节点的内容字段
+                    }
+                    
+                    # 只更新激活值相关字段，保留原始节点的其他字段
+                    for field in activation_fields:
+                        if field in updated_map[node_id]:
+                            merged_node[field] = updated_map[node_id][field]
+                    
+                    merged_nodes.append(merged_node)
+                else:
+                    # 如果没有更新数据，保留原始节点
+                    merged_nodes.append(original_node)
             
             updated_results[key] = merged_nodes
         else:
diff --git a/api/app/services/draft_run_service.py b/api/app/services/draft_run_service.py
index acea60b7..569684d5 100644
--- a/api/app/services/draft_run_service.py
+++ b/api/app/services/draft_run_service.py
@@ -15,6 +15,7 @@ from pydantic import BaseModel, Field
 from sqlalchemy import select
 from sqlalchemy.orm import Session
 
+from app.celery_app import celery_app
 from app.core.error_codes import BizCode
 from app.core.exceptions import BusinessException
 from app.core.logging_config import get_business_logger
@@ -22,6 +23,7 @@ from app.core.rag.nlp.search import knowledge_retrieval
 from app.models import AgentConfig, ModelApiKey, ModelConfig
 from app.repositories.tool_repository import ToolRepository
 from app.schemas.prompt_schema import PromptMessageRole, render_prompt_message
+from app.services import task_service
 from app.services.langchain_tool_server import Search
 from app.services.memory_agent_service import MemoryAgentService
 from app.services.model_parameter_merger import ModelParameterMerger
@@ -101,6 +103,14 @@ def create_long_term_memory_tool(memory_config: Dict[str, Any], end_user_id: str
                         user_rag_memory_id=user_rag_memory_id
                     )
                 )
+                task = celery_app.send_task(
+                    "app.core.memory.agent.read_message",
+                    args=[end_user_id, question, [], "1", config_id, storage_type, user_rag_memory_id]
+                )
+                result = task_service.get_task_memory_read_result(task.id)
+                status = result.get("status")
+                logger.info(f"读取任务状态：{status}")
+
             finally:
                 db.close()
             logger.info(f'用户ID：Agent:{end_user_id}')
diff --git a/api/app/services/workflow_service.py b/api/app/services/workflow_service.py
index 68d6279b..7d3c784f 100644
--- a/api/app/services/workflow_service.py
+++ b/api/app/services/workflow_service.py
@@ -491,6 +491,17 @@ class WorkflowService:
                 )
                 end_user_id = str(new_end_user.id)
 
+            executions = self.execution_repo.get_by_conversation_id(conversation_id=conversation_id_uuid)
+
+            for exec_res in executions:
+                if exec_res.status == "completed":
+                    last_state = exec_res.output_data
+                    if isinstance(last_state, dict):
+                        variables = last_state.get("variables", {})
+                        conv_vars = variables.get("conv", {})
+                        input_data["conv"] = conv_vars
+                        break
+
             result = await execute_workflow(
                 workflow_config=workflow_config_dict,
                 input_data=input_data,
@@ -504,7 +515,7 @@ class WorkflowService:
                 self.update_execution_status(
                     execution.execution_id,
                     "completed",
-                    output_data=result.get("node_outputs", {})
+                    output_data=result
                 )
             else:
                 self.update_execution_status(
@@ -517,6 +528,7 @@ class WorkflowService:
             return {
                 "execution_id": execution.execution_id,
                 "status": result.get("status"),
+                "variables": result.get("variables"),
                 "output": result.get("output"),  # 最终输出（字符串）
                 "output_data": result.get("node_outputs", {}),  # 所有节点输出（详细数据）
                 "conversation_id": result.get("conversation_id"),  # 所有节点输出（详细数据）payload.,  # 会话 ID
@@ -617,6 +629,16 @@ class WorkflowService:
                     original_user_id=payload.user_id  # Save original user_id to other_id
                 )
                 end_user_id = str(new_end_user.id)
+            executions = self.execution_repo.get_by_conversation_id(conversation_id=conversation_id_uuid)
+
+            for exec_res in executions:
+                if exec_res.status == "completed":
+                    last_state = exec_res.output_data
+                    if isinstance(last_state, dict):
+                        variables = last_state.get("variables", {})
+                        conv_vars = variables.get("conv", {})
+                        input_data["conv"] = conv_vars
+                        break
 
             # 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(
@@ -827,6 +849,23 @@ class WorkflowService:
                     user_id=user_id
             ):
                 # 直接转发事件（executor 已经返回正确格式）
+                if event.get("event") == "workflow_end":
+
+                    status = event.get("data", {}).get("status")
+                    if status == "completed":
+                        self.update_execution_status(
+                            execution_id,
+                            "completed",
+                            output_data=event.get("data")
+                        )
+                    elif status == "failed":
+                        self.update_execution_status(
+                            execution_id,
+                            "failed",
+                            output_data=event.get("data")
+                        )
+                    else:
+                        logger.error(f"unexpect workflow run status, status: {status}")
                 yield event
 
         except Exception as e: