diff --git a/arclet/entari/plugin/model.py b/arclet/entari/plugin/model.py
index 8e076ac..eadfc8c 100644
--- a/arclet/entari/plugin/model.py
+++ b/arclet/entari/plugin/model.py
@@ -17,7 +17,7 @@
 from loguru import logger
 from satori.client import Account
 
-from .service import plugin_service, PluginLifecycleService
+from .service import PluginLifecycleService, plugin_service
 
 if TYPE_CHECKING:
     from ..event import Event
@@ -189,7 +189,7 @@ def dispose(self):
         sys.modules.pop(self.module.__name__, None)
         delattr(self.module, "__plugin__")
         if self.subplugins:
-            subplugs = list(i.removeprefix(self.id)[1:] for i in self.subplugins)
+            subplugs = [i.removeprefix(self.id)[1:] for i in self.subplugins]
             subplugs = (subplugs[:3] + ["..."]) if len(subplugs) > 3 else subplugs
             logger.debug(f"disposing sub-plugin {', '.join(subplugs)} of {self.id}")
             for subplug in self.subplugins:
diff --git a/arclet/entari/plugin/service.py b/arclet/entari/plugin/service.py
index c1b7da7..8b6b944 100644
--- a/arclet/entari/plugin/service.py
+++ b/arclet/entari/plugin/service.py
@@ -28,26 +28,25 @@ def __init__(self, plugin_id: str):
 
     @property
     def available(self) -> bool:
-        return bool(plug := plugin_service.plugins.get(self.plugin_id)) and bool(plug._preparing or plug._running or plug._cleanup)
+        return bool(plug := plugin_service.plugins.get(self.plugin_id)) and bool(
+            plug._preparing or plug._running or plug._cleanup
+        )
 
     @staticmethod
     def iter_preparing(plug: "Plugin"):
-        for func in plug._preparing:
-            yield func
+        yield from plug._preparing
         for subplug in plug.subplugins:
             yield from PluginLifecycleService.iter_preparing(plugin_service.plugins[subplug])
 
     @staticmethod
     def iter_cleanup(plug: "Plugin"):
-        for func in plug._cleanup:
-            yield func
+        yield from plug._cleanup
         for subplug in plug.subplugins:
             yield from PluginLifecycleService.iter_cleanup(plugin_service.plugins[subplug])
 
     @staticmethod
     def iter_running(plug: "Plugin"):
-        for func in plug._running:
-            yield func
+        yield from plug._running
         for subplug in plug.subplugins:
             yield from PluginLifecycleService.iter_running(plugin_service.plugins[subplug])
 
@@ -55,7 +54,9 @@ async def launch(self, manager: Launart):
         plug = plugin_service.plugins[self.plugin_id]
 
         async with self.stage("preparing"):
-            await asyncio.gather(*[func() for func in PluginLifecycleService.iter_preparing(plug)], return_exceptions=True)
+            await asyncio.gather(
+                *[func() for func in PluginLifecycleService.iter_preparing(plug)], return_exceptions=True
+            )
         async with self.stage("blocking"):
             sigexit_task = asyncio.create_task(manager.status.wait_for_sigexit())
             running_tasks = [asyncio.create_task(func()) for func in PluginLifecycleService.iter_running(plug)]  # type: ignore
@@ -68,7 +69,9 @@ async def launch(self, manager: Launart):
                     task.cancel()
                     await task
         async with self.stage("cleanup"):
-            await asyncio.gather(*[func() for func in PluginLifecycleService.iter_cleanup(plug)], return_exceptions=True)
+            await asyncio.gather(
+                *[func() for func in PluginLifecycleService.iter_cleanup(plug)], return_exceptions=True
+            )
 
         del plug
 
diff --git a/arclet/entari/session.py b/arclet/entari/session.py
index e604524..19bc2ee 100644
--- a/arclet/entari/session.py
+++ b/arclet/entari/session.py
@@ -7,7 +7,7 @@
 from satori.client.account import Account
 from satori.client.protocol import ApiProtocol
 from satori.element import Element
-from satori.model import Channel, Guild, Member, MessageObject, MessageReceipt, PageResult, Role, User
+from satori.model import Channel, Guild, Member, MessageReceipt, PageResult, Role, User
 
 from .event import Event, FriendRequestEvent, GuildMemberRequestEvent, GuildRequestEvent, MessageEvent
 from .message import MessageChain