diff --git a/src/langbot/pkg/platform/adapters/aiocqhttp/adapter.py b/src/langbot/pkg/platform/adapters/aiocqhttp/adapter.py
index 0ef8f84eb..6840d7131 100644
--- a/src/langbot/pkg/platform/adapters/aiocqhttp/adapter.py
+++ b/src/langbot/pkg/platform/adapters/aiocqhttp/adapter.py
@@ -212,6 +212,9 @@ class AiocqhttpAdapter(AiocqhttpAPIMixin, abstract_platform_adapter.AbstractPlat
 
     async def _handle_native_event(self, event: aiocqhttp.Event):
         self.bot_account_id = str(getattr(event, 'self_id', '') or self.bot_account_id)
+        # Connection metadata belongs to the adapter, never business event routing.
+        if getattr(event, 'type', None) == 'meta_event':
+            return
         if getattr(event, 'type', None) == 'message' and str(getattr(event, 'user_id', '')) == self.bot_account_id:
             return
         try:
diff --git a/src/langbot/pkg/platform/adapters/aiocqhttp/event_converter.py b/src/langbot/pkg/platform/adapters/aiocqhttp/event_converter.py
index 25a6366f2..d1c39d277 100644
--- a/src/langbot/pkg/platform/adapters/aiocqhttp/event_converter.py
+++ b/src/langbot/pkg/platform/adapters/aiocqhttp/event_converter.py
@@ -34,8 +34,6 @@ class AiocqhttpEventConverter(abstract_platform_adapter.AbstractEventConverter):
             return AiocqhttpEventConverter.notice_to_eba(event, bot_user_id)
         if event_type == 'request':
             return AiocqhttpEventConverter.request_to_eba(event)
-        if event_type == 'meta_event':
-            return AiocqhttpEventConverter.platform_specific(event, f'meta.{getattr(event, "detail_type", "")}')
         return None
 
     @staticmethod
diff --git a/tests/unit_tests/platform/test_aiocqhttp_eba_adapter.py b/tests/unit_tests/platform/test_aiocqhttp_eba_adapter.py
index cf704bd3f..58473bf00 100644
--- a/tests/unit_tests/platform/test_aiocqhttp_eba_adapter.py
+++ b/tests/unit_tests/platform/test_aiocqhttp_eba_adapter.py
@@ -55,6 +55,33 @@ def onebot_event(payload: dict) -> aiocqhttp.Event:
     return aiocqhttp.Event.from_payload(payload)
 
 
+@pytest.mark.parametrize('meta_type', ['heartbeat', 'lifecycle', 'future_transport_metadata'])
+async def test_protocol_metadata_never_reaches_business_listeners(meta_type):
+    adapter = make_adapter()
+    listener = AsyncMock()
+    adapter.register_listener(platform_events.EBAEvent, listener)
+    payload = {'post_type': 'meta_event', 'meta_event_type': meta_type, 'self_id': 42, 'time': 1700000000}
+    assert await AiocqhttpEventConverter.target2yiri(onebot_event(payload)) is None
+    await adapter._receive_event(payload)
+    listener.assert_not_awaited()
+    assert adapter.bot_account_id == '42'
+
+    # Genuine platform-specific user interactions still reach business routing.
+    await adapter._receive_event(
+        {
+            'post_type': 'notice',
+            'notice_type': 'notify',
+            'sub_type': 'poke',
+            'self_id': 42,
+            'time': 1700000001,
+            'user_id': 10001,
+            'target_id': 42,
+        }
+    )
+    listener.assert_awaited_once()
+    assert listener.await_args.args[0].type == 'platform.specific'
+
+
 def test_aiocqhttp_supported_events_match_manifest():
     assert make_adapter().get_supported_events() == manifest()['spec']['supported_events']