Update ContentWritrerFlow.py

ContentWritrerFlow.py

@@ -10,6 +10,30 @@ log = logging.get_logger(__name__)
 
 
 class ContentWriterFlow(CircularFlow, ABC):
+    """This is an abstract class for writing content (plan, code)
+    The ContentWriterFlow is made of a controller and a branching executor.
+    Each time the controller is called, the controller decides whether to write content
+    or to finish. If the content writer executor is called, the executor will write content
+    in an interactive way, finally, the user is able to give feedback to the content, so that
+    the controller can decide whether to write content again or to finish.
+    
+    *Configuration Parameters*:
+    - `name`
+    - `description`
+    - `max_round`
+    - `subflows_config`:
+        - `Controller` (dict): The controller that decides whether to write content or to finish.
+        - `Executor` (dict): A branching flow, we configure the specific executor in the subflows of the executor.
+    - `early_exit_key`: The key of the early exit variable in the output payload of the executor.
+    - `topology`: The topology of the subflows, this describes the I/O interface instances.
+    
+    *Input Interface*:
+    - `goal`
+    
+    *Output Interface*:
+    - `answer`
+    - `status`
+    """
     @abstractmethod
     def _on_reach_max_round(self):
         """