update refactoring and add new features

CLI.py

@@ -827,9 +827,14 @@ class CmdletCompleter(Completer):
             return None
         raw_plugin = CmdletCompleter._flag_value(stage_tokens, "-plugin", "--plugin")
         if raw_plugin:
-            # Strip quotes if present, then normalize to lowercase
             stripped = CmdletCompleter._strip_quotes(str(raw_plugin or ""))
-            return stripped.strip().lower() if stripped else None
+            if not stripped:
+                return None
+            plugin_name = stripped.strip().lower()
+            if "," in plugin_name:
+                parts = [p.strip() for p in plugin_name.split(",") if p.strip()]
+                return parts[0] if parts else None
+            return plugin_name
         return None
 
     @staticmethod
@@ -1058,11 +1063,20 @@ class CmdletCompleter(Completer):
                 logical: idx for idx, logical in enumerate(file_stage_order)
             }
 
+        action_logicals = {logical for logical, _ in self._FILE_STAGE_ACTION_CMDLETS}
+        chosen_actions: Set[str] = set()
+        for token in stage_tokens:
+            logical = str(token).lstrip("-").strip().lower()
+            if logical in action_logicals:
+                chosen_actions.add(logical)
+
         filtered: List[Tuple[int, int, str]] = []
         for index, arg in enumerate(arg_names):
             logical = str(arg or "").lstrip("-").strip().lower()
             if file_stage_order is not None and logical not in file_stage_rank:
                 continue
+            if chosen_actions and logical in action_logicals and logical not in chosen_actions:
+                continue
             if logical == "open":
                 continue
             if logical == "instance":
@@ -3085,6 +3099,10 @@ Come to love it when others take what you share, as there is no greater joy
                     if "|" in tokens or (tokens and tokens[0].startswith("@")):
                         self._pipeline_executor.execute_tokens(tokens)
                     else:
+                        try:
+                            ctx.clear_pending_pipeline_tail()
+                        except Exception:
+                            pass
                         cmd_name = tokens[0].replace("_", "-").lower()
                         is_help = any(
                             arg in {"-help",