尝试调整一下内容

plugin_common/plugin_manager.py

@@ -108,9 +108,11 @@ class PluginManager:
             for name, obj in inspect.getmembers(module):
                 if (inspect.isclass(obj) and 
                     issubclass(obj, PluginInterface) and 
-                    obj != PluginInterface and
-                    obj != MessagePluginInterface and
-                    obj != ScheduledPluginInterface):
+                    obj != PluginInterface
+                    # 修改这里：不排除继承自 MessagePluginInterface 和 ScheduledPluginInterface 的类
+                    # obj != MessagePluginInterface and
+                    # obj != ScheduledPluginInterface
+                    ):
                     plugin_class = obj
                     break
             

plugins/message_summary/__init__.py

@@ -1,3 +1,7 @@
-# 插件初始化文件
-# 从main模块导入插件类
-from .main import MessageSummaryPlugin
+from plugins.message_summary.main import MessageSummaryPlugin
+
+def get_plugin():
+    """获取插件实例"""
+    return MessageSummaryPlugin()
+
+__all__ = ['MessageSummaryPlugin', 'get_plugin']