feat: Stream mode task spliting

backend/app/service/task.py

@@ -20,6 +20,8 @@ class Action(str, Enum):
     update_task = "update_task"  # user -> backend
     task_state = "task_state"  # backend -> user
     new_task_state = "new_task_state"  # backend -> user
+    decompose_progress = "decompose_progress"  # backend -> user (streaming decomposition)
+    decompose_text = "decompose_text"  # backend -> user (raw streaming text)
     start = "start"  # user -> backend
     create_agent = "create_agent"  # backend -> user
     activate_agent = "activate_agent"  # backend -> user
@@ -64,6 +66,17 @@ class ActionTaskStateData(BaseModel):
     action: Literal[Action.task_state] = Action.task_state
     data: dict[Literal["task_id", "content", "state", "result", "failure_count"], str | int]
 
+
+class ActionDecomposeProgressData(BaseModel):
+    action: Literal[Action.decompose_progress] = Action.decompose_progress
+    data: dict
+
+
+class ActionDecomposeTextData(BaseModel):
+    action: Literal[Action.decompose_text] = Action.decompose_text
+    data: dict
+
+
 class ActionNewTaskStateData(BaseModel):
     action: Literal[Action.new_task_state] = Action.new_task_state
     data: dict[Literal["task_id", "content", "state", "result", "failure_count"], str | int]
@@ -227,6 +240,8 @@ class ActionSkipTaskData(BaseModel):
     | ActionAddTaskData
     | ActionRemoveTaskData
     | ActionSkipTaskData
+    | ActionDecomposeTextData
+    | ActionDecomposeProgressData
 )
 
 

backend/app/utils/agent.py

@@ -108,6 +108,7 @@ def __init__(
         prune_tool_calls_from_memory: bool = False,
         enable_snapshot_clean: bool = False,
         step_timeout: float | None = 900,
+        **kwargs: Any,
     ) -> None:
         super().__init__(
             system_message=system_message,
@@ -130,6 +131,7 @@ def __init__(
             prune_tool_calls_from_memory=prune_tool_calls_from_memory,
             enable_snapshot_clean=enable_snapshot_clean,
             step_timeout=step_timeout,
+            **kwargs,
         )
         self.api_task_id = api_task_id
         self.agent_name = agent_name
@@ -533,6 +535,21 @@ def agent_model(
         )
     )
 
+    # Build model config, defaulting to streaming for planner
+    extra_params = options.extra_params or {}
+    model_config: dict[str, Any] = {}
+    if options.is_cloud():
+        model_config["user"] = str(options.project_id)
+    model_config.update(
+        {
+            k: v
+            for k, v in extra_params.items()
+            if k not in ["model_platform", "model_type", "api_key", "url"]
+        }
+    )
+    if agent_name == Agents.task_agent:
+        model_config["stream"] = True
+
     return ListenChatAgent(
         options.project_id,
         agent_name,
@@ -542,23 +559,15 @@ def agent_model(
             model_type=options.model_type,
             api_key=options.api_key,
             url=options.api_url,
-            model_config_dict={
-                "user": str(options.project_id),
-            }
-            if options.is_cloud()
-            else None,
-            **{
-                k: v
-                for k, v in (options.extra_params or {}).items()
-                if k not in ["model_platform", "model_type", "api_key", "url"]
-            },
+            model_config_dict=model_config or None,
         ),
         # output_language=options.language,
         tools=tools,
         agent_id=agent_id,
         prune_tool_calls_from_memory=prune_tool_calls_from_memory,
         toolkits_to_register_agent=toolkits_to_register_agent,
         enable_snapshot_clean=enable_snapshot_clean,
+        stream_accumulate=False,
     )
 
 

backend/app/utils/workforce.py

@@ -12,6 +12,7 @@
 from camel.societies.workforce.utils import TaskAssignResult
 from camel.societies.workforce.workforce_metrics import WorkforceMetrics
 from camel.societies.workforce.events import WorkerCreatedEvent
+from camel.societies.workforce.prompts import TASK_DECOMPOSE_PROMPT
 from camel.tasks.task import Task, TaskState, validate_task_content
 from app.component import code
 from app.exception.exception import UserException
@@ -65,14 +66,22 @@ def __init__(
         )
         logger.info(f"[WF-LIFECYCLE] ✅ Workforce.__init__ COMPLETED, id={id(self)}")
 
-    def eigent_make_sub_tasks(self, task: Task, coordinator_context: str = ""):
+    def eigent_make_sub_tasks(
+        self,
+        task: Task,
+        coordinator_context: str = "",
+        on_stream_batch=None,
+        on_stream_text=None,
+    ):
         """
         Split process_task method to eigent_make_sub_tasks and eigent_start method.
 
         Args:
             task: The main task to decompose
             coordinator_context: Optional context ONLY for coordinator agent during decomposition.
                                 This context will NOT be passed to subtasks or worker agents.
+            on_stream_batch: Optional callback for streaming batches signature (List[Task], bool)
+            on_stream_text: Optional callback for raw streaming text chunks
         """
         logger.info("=" * 80)
         logger.info("🧩 [DECOMPOSE] eigent_make_sub_tasks CALLED", extra={
@@ -103,7 +112,15 @@ def eigent_make_sub_tasks(self, task: Task, coordinator_context: str = ""):
         logger.info(f"[DECOMPOSE] Workforce reset complete, state: {self._state.name}")
 
         logger.info(f"[DECOMPOSE] Calling handle_decompose_append_task")
-        subtasks = asyncio.run(self.handle_decompose_append_task(task, reset=False, coordinator_context=coordinator_context))
+        subtasks = asyncio.run(
+            self.handle_decompose_append_task(
+                task, 
+                reset=False, 
+                coordinator_context=coordinator_context,
+                on_stream_batch=on_stream_batch, 
+                on_stream_text=on_stream_text
+            )
+        )
         logger.info("=" * 80)
         logger.info(f"✅ [DECOMPOSE] Task decomposition COMPLETED", extra={
             "api_task_id": self.api_task_id,
@@ -142,8 +159,45 @@ async def eigent_start(self, subtasks: list[Task]):
                 self._state = WorkforceState.IDLE
                 logger.info(f"[WF-LIFECYCLE] Workforce state set to IDLE")
 
+    def _decompose_task(self, task: Task, stream_callback=None):
+        """Decompose task with optional streaming text callback."""
+
+        decompose_prompt = str(
+            TASK_DECOMPOSE_PROMPT.format(
+                content=task.content,
+                child_nodes_info=self._get_child_nodes_info(),
+                additional_info=task.additional_info,
+            )
+        )
+        self.task_agent.reset()
+        result = task.decompose(
+            self.task_agent, decompose_prompt, stream_callback=stream_callback
+        )
+
+        if isinstance(result, Generator):
+            def streaming_with_dependencies():
+                all_subtasks = []
+                for new_tasks in result:
+                    all_subtasks.extend(new_tasks)
+                    if new_tasks:
+                        self._update_dependencies_for_decomposition(
+                            task, all_subtasks
+                        )
+                    yield new_tasks
+            return streaming_with_dependencies()
+        else:
+            subtasks = result
+            if subtasks:
+                self._update_dependencies_for_decomposition(task, subtasks)
+            return subtasks
+
     async def handle_decompose_append_task(
-        self, task: Task, reset: bool = True, coordinator_context: str = ""
+        self,
+        task: Task,
+        reset: bool = True,
+        coordinator_context: str = "",
+        on_stream_batch=None,
+        on_stream_text=None,
     ) -> List[Task]:
         """
         Override to support coordinator_context parameter.
@@ -153,6 +207,8 @@ async def handle_decompose_append_task(
             task: The task to be processed
             reset: Should trigger workforce reset (Workforce must not be running)
             coordinator_context: Optional context ONLY for coordinator during decomposition
+            on_stream_batch: Optional callback for streaming batches signature (List[Task], bool)
+            on_stream_text: Optional callback for raw streaming text chunks
 
         Returns:
             List[Task]: The decomposed subtasks or the original task
@@ -186,18 +242,23 @@ async def handle_decompose_append_task(
             task.content = task_with_context
 
             logger.info(f"[DECOMPOSE] Calling _decompose_task with context")
-            subtasks_result = self._decompose_task(task)
+            subtasks_result = self._decompose_task(task, stream_callback=on_stream_text)
 
             task.content = original_content
         else:
             logger.info(f"[DECOMPOSE] Calling _decompose_task without context")
-            subtasks_result = self._decompose_task(task)
+            subtasks_result = self._decompose_task(task, stream_callback=on_stream_text)
 
         logger.info(f"[DECOMPOSE] _decompose_task returned, processing results")
         if isinstance(subtasks_result, Generator):
             subtasks = []
             for new_tasks in subtasks_result:
                 subtasks.extend(new_tasks)
+                if on_stream_batch:
+                    try:
+                        on_stream_batch(new_tasks, False)
+                    except Exception as e:
+                        logger.warning(f"Streaming callback failed: {e}")
             logger.info(f"[DECOMPOSE] Collected {len(subtasks)} subtasks from generator")
         else:
             subtasks = subtasks_result
@@ -218,6 +279,12 @@ async def handle_decompose_append_task(
             subtasks = [fallback_task]
             logger.info(f"[DECOMPOSE] Created fallback task: {fallback_task.id}")
 
+        if on_stream_batch:
+            try:
+                on_stream_batch(subtasks, True)
+            except Exception as e:
+                logger.warning(f"Final streaming callback failed: {e}")
+
         return subtasks
 
     async def _find_assignee(self, tasks: List[Task]) -> TaskAssignResult:

src/components/ChatBox/ProjectSection.tsx

@@ -23,7 +23,39 @@ export const ProjectSection = React.forwardRef<HTMLDivElement, ProjectSectionPro
   onSkip,
   isPauseResumeLoading
 }, ref) => {
-  const chatState = chatStore.getState();
+  // Subscribe to store changes with throttling to prevent excessive re-renders
+  const [chatState, setChatState] = React.useState(() => chatStore.getState());
+
+  React.useEffect(() => {
+    let timeoutId: NodeJS.Timeout | null = null;
+    let latestState: any = null;
+
+    const unsubscribe = chatStore.subscribe((state) => {
+      latestState = state;
+
+      // Throttle updates to max once per 100ms
+      if (!timeoutId) {
+        timeoutId = setTimeout(() => {
+          if (latestState) {
+            setChatState(latestState);
+          }
+          timeoutId = null;
+        }, 100);
+      }
+    });
+
+    return () => {
+      unsubscribe();
+      if (timeoutId) {
+        clearTimeout(timeoutId);
+        // Apply final state on cleanup
+        if (latestState) {
+          setChatState(latestState);
+        }
+      }
+    };
+  }, [chatStore]);
+
   const activeTaskId = chatState.activeTaskId;
 
   if (!activeTaskId || !chatState.tasks[activeTaskId]) {
@@ -33,8 +65,17 @@ export const ProjectSection = React.forwardRef<HTMLDivElement, ProjectSectionPro
   const task = chatState.tasks[activeTaskId];
   const messages = task.messages || [];
 
-  // Group messages by query cycles and show in chronological order (oldest first)
-  const queryGroups = groupMessagesByQuery(messages);
+  // Create a stable key based on messages content to prevent excessive re-renders
+  const lastMessage = messages[messages.length - 1];
+  const messagesKey = React.useMemo(() => {
+    // Only re-compute when message count or last message changes
+    return `${messages.length}-${lastMessage?.id || ''}-${lastMessage?.content?.length || 0}`;
+  }, [messages.length, lastMessage?.id, lastMessage?.content?.length]);
+
+  // Memoize grouping to prevent re-creating objects on every render
+  const queryGroups = React.useMemo(() => {
+    return groupMessagesByQuery(messages);
+  }, [messagesKey]);
 
   return (
     <motion.div
@@ -152,7 +193,7 @@ function groupMessagesByQuery(messages: any[]) {
           otherMessages: []
         };
       }
-  } else {
+    } else {
       // Other messages (assistant responses, errors, etc.)
       if (currentGroup) {
         currentGroup.otherMessages.push(message);