diff --git a/metagpt/roles/engineer.py b/metagpt/roles/engineer.py
index 78a7f3ba2..2bb1f3ea2 100644
--- a/metagpt/roles/engineer.py
+++ b/metagpt/roles/engineer.py
@@ -70,96 +70,6 @@ class Engineer(Role):
         m = json.loads(task_msg.content)
         return m.get("Task list")
 
-    # @classmethod
-    # def parse_tasks(cls, task_msg: Message) -> list[str]:
-    #     if task_msg.instruct_content:
-    #         return task_msg.instruct_content.dict().get("Task list")
-    #     return CodeParser.parse_file_list(block="Task list", text=task_msg.content)
-    #
-    # @classmethod
-    # def parse_code(cls, code_text: str) -> str:
-    #     return CodeParser.parse_code(block="", text=code_text)
-    #
-    # @classmethod
-    # def parse_workspace(cls, system_design_msg: Message) -> str:
-    #     if system_design_msg.instruct_content:
-    #         return system_design_msg.instruct_content.dict().get("project_name").strip().strip("'").strip('"')
-    #     return CodeParser.parse_str(block="project_name", text=system_design_msg.content)
-    #
-    # def get_workspace(self) -> Path:
-    #     msg = self._rc.memory.get_by_action(WriteDesign)[-1]
-    #     if not msg:
-    #         return CONFIG.workspace_path / "src"
-    #     workspace = self.parse_workspace(msg)
-    #     # Codes are written in workspace/{package_name}/{package_name}
-    #     return CONFIG.workspace_path / workspace / workspace
-    #
-    # def recreate_workspace(self):
-    #     workspace = self.get_workspace()
-    #     try:
-    #         shutil.rmtree(workspace)
-    #     except FileNotFoundError:
-    #         pass  # The folder does not exist, but we don't care
-    #     workspace.mkdir(parents=True, exist_ok=True)
-    #
-    # def write_file(self, filename: str, code: str):
-    #     workspace = self.get_workspace()
-    #     filename = filename.replace('"', "").replace("\n", "")
-    #     file = workspace / filename
-    #     file.parent.mkdir(parents=True, exist_ok=True)
-    #     file.write_text(code)
-    #     return file
-    #
-    # def recv(self, message: Message) -> None:
-    #     self._rc.memory.add(message)
-    #     if message in self._rc.important_memory:
-    #         self.todos = self.parse_tasks(message)
-    #
-    # async def _act_mp(self) -> Message:
-    #     # self.recreate_workspace()
-    #     todo_coros = []
-    #     for todo in self.todos:
-    #         todo_coro = WriteCode().run(
-    #             context=self._rc.memory.get_by_actions([WriteTasks, WriteDesign]), filename=todo
-    #         )
-    #         todo_coros.append(todo_coro)
-    #
-    #     rsps = await gather_ordered_k(todo_coros, self.n_borg)
-    #     for todo, code_rsp in zip(self.todos, rsps):
-    #         _ = self.parse_code(code_rsp)
-    #         logger.info(todo)
-    #         logger.info(code_rsp)
-    #         # self.write_file(todo, code)
-    #         msg = Message(content=code_rsp, role=self.profile, cause_by=type(self._rc.todo))
-    #         self._rc.memory.add(msg)
-    #         del self.todos[0]
-    #
-    #     logger.info(f"Done {self.get_workspace()} generating.")
-    #     msg = Message(content="all done.", role=self.profile, cause_by=type(self._rc.todo))
-    #     return msg
-    #
-    # async def _act_sp(self) -> Message:
-    #     code_msg_all = []  # gather all code info, will pass to qa_engineer for tests later
-    #     for todo in self.todos:
-    #         code = await WriteCode().run(context=self._rc.history, filename=todo)
-    #         # logger.info(todo)
-    #         # logger.info(code_rsp)
-    #         # code = self.parse_code(code_rsp)
-    #         file_path = self.write_file(todo, code)
-    #         msg = Message(content=code, role=self.profile, cause_by=type(self._rc.todo))
-    #         self._rc.memory.add(msg)
-    #
-    #         code_msg = todo + FILENAME_CODE_SEP + str(file_path)
-    #         code_msg_all.append(code_msg)
-    #
-    #     logger.info(f"Done {self.get_workspace()} generating.")
-    #     msg = Message(
-    #         content=MSG_SEP.join(code_msg_all), role=self.profile, cause_by=type(self._rc.todo), send_to="QaEngineer"
-    #     )
-    #     return msg
-
-    # async def _act_sp_with_cr(self) -> Message:
-    #     code_msg_all = []  # gather all code info, will pass to qa_engineer for tests later
     async def _act_sp_with_cr(self, review=False) -> Set[str]:
         changed_files = set()
         src_file_repo = CONFIG.git_repo.new_file_repository(CONFIG.src_workspace)
diff --git a/metagpt/roles/role.py b/metagpt/roles/role.py
index ba07c0c16..47ffb3f9e 100644
--- a/metagpt/roles/role.py
+++ b/metagpt/roles/role.py
@@ -287,6 +287,7 @@ class Role:
             )
         else:
             msg = Message(content=response, role=self.profile, cause_by=self._rc.todo)
+        self._rc.memory.add(msg)
 
         return msg
 
@@ -295,9 +296,10 @@ class Role:
         # Read unprocessed messages from the msg buffer.
         news = self._rc.msg_buffer.pop_all()
         # Store the read messages in your own memory to prevent duplicate processing.
+        old_messages = self._rc.memory.get()
         self._rc.memory.add_batch(news)
         # Filter out messages of interest.
-        self._rc.news = [n for n in news if n.cause_by in self._rc.watch]
+        self._rc.news = [n for n in news if n.cause_by in self._rc.watch and n not in old_messages]
 
         # Design Rules:
         # If you need to further categorize Message objects, you can do so using the Message.set_meta function.
diff --git a/metagpt/roles/sk_agent.py b/metagpt/roles/sk_agent.py
index 92de94bd4..56482ef26 100644
--- a/metagpt/roles/sk_agent.py
+++ b/metagpt/roles/sk_agent.py
@@ -74,5 +74,4 @@ class SkAgent(Role):
 
         msg = Message(content=result, role=self.profile, cause_by=self._rc.todo)
         self._rc.memory.add(msg)
-        self.publish_message(msg)
         return msg