diff --git a/__init__.py b/__init__.py
index e1aa7a0..e7e6f46 100644
--- a/__init__.py
+++ b/__init__.py
@@ -21,3 +21,8 @@ def startup():
         rlib.set_ghp(pconfig.github_token)
     rlib.boot(str(Path.cwd()), "nonebot_plugin_sekai_update_notify", pconfig.assets_studio_path)
     scheduler.add_job(sync, "interval", seconds=10, id="sekai_update_sync", replace_existing=True)
+
+
+@driver.on_shutdown
+def shutdown():
+    rlib.stop()
diff --git a/lib.py b/lib.py
index 4fcbf89..ce2cecc 100644
--- a/lib.py
+++ b/lib.py
@@ -39,9 +39,13 @@ class SekaiSyncLib:
         self.lib.ghp.argtypes = [ctypes.c_char_p]
         self.lib.ghp.restype = None
 
-        # boot(cwd: *const c_char, name: *const c_char, as_path: *const c_char) -> i32
+        # boot(cwd: *const c_char, name: *const c_char, as_path: *const c_char) -> c_int
         self.lib.boot.argtypes = [ctypes.c_char_p, ctypes.c_char_p, ctypes.c_char_p]
-        self.lib.boot.restype = ctypes.c_int32
+        self.lib.boot.restype = ctypes.c_int
+
+        # stop() -> c_int
+        self.lib.stop.argtypes = []
+        self.lib.stop.restype = ctypes.c_int
 
         # fetch_data() -> *mut c_char
         # ⚠️ 这里必须用 c_void_p，不能用 c_char_p，否则会丢失指针地址导致内存泄漏
@@ -77,6 +81,12 @@ class SekaiSyncLib:
             self._str_to_bytes(as_path)
         )
 
+    def stop(self) -> int:
+        """
+        停止主循环与清理状态
+        """
+        return self.lib.stop()
+
     def fetch_data(self) -> Optional[FetchData]:
         # 1. 获取裸指针
         ptr = self.lib.fetch_data()
diff --git a/sync.py b/sync.py
index 15cb92c..f952468 100644
--- a/sync.py
+++ b/sync.py
@@ -1,9 +1,11 @@
 import json
 from pathlib import Path
 
-from nonebot import get_bot
-from nonebot.adapters.onebot.v11 import Message, MessageSegment
-from nonebot_plugin_apscheduler import scheduler
+from nonebot import get_bot, logger
+from nonebot.adapters.onebot.v11 import Message, MessageSegment, GroupMessageEvent
+from nonebot.internal.matcher import Matcher
+from nonebot.permission import SUPERUSER
+from nonebot.plugin.on import on_command
 
 from .config import pconfig
 from .lib import rlib
@@ -33,7 +35,7 @@ async def sync():
     if data is None:
         return
     message = Message()
-    inner = [MessageSegment.text(f"活动 {data.event_id} 的卡牌更新了！\n")]
+    inner = [MessageSegment.text(f"活动 {data.event_id} 的卡牌更新了！")]
     for item in data.card_paths:
         p = Path(item)
         n = MessageSegment.image(file=item)
@@ -49,5 +51,26 @@ async def sync():
     for group in enabled_groups:
         await get_bot().send_group_msg(message=message, group_id=group)
 
+    for path in data.card_paths:
+        try:
+            Path(path).unlink()
+        except Exception as e:
+            logger.error(f"删除文件 {path} 失败: {e}")
 
 
+subscribe = on_command("订阅烤leak", permission=SUPERUSER)
+unsubscribe = on_command("退订烤leak", permission=SUPERUSER)
+
+
+@subscribe.handle()
+async def _(event: GroupMessageEvent, matcher: Matcher):
+    group_id = event.group_id
+    add_group(group_id)
+    await matcher.send(f"已订阅烤leak更新")
+
+
+@unsubscribe.handle()
+async def _(event: GroupMessageEvent, matcher: Matcher):
+    group_id = event.group_id
+    remove_group(group_id)
+    await matcher.send(f"已退订烤leak更新")