fix(plugin): tolerate older runtime sdk without vector list

Author: bjhx2003

src/langbot/pkg/plugin/handler.py

@@ -555,19 +555,19 @@ async def vector_delete(data: dict[str, Any]) -> handler.ActionResponse:
             except Exception as e:
                 return _make_rag_error_response(e, 'VectorStoreError', collection_id=collection_id)
 
-        @self.action(PluginToRuntimeAction.VECTOR_LIST)
-        async def vector_list(data: dict[str, Any]) -> handler.ActionResponse:
-            collection_id = data['collection_id']
-            filters = data.get('filters')
-            limit = data.get('limit', 20)
-            offset = data.get('offset', 0)
-            try:
-                items, total = await self.ap.rag_runtime_service.vector_list(
-                    collection_id, filters, limit, offset
-                )
-                return handler.ActionResponse.success(data={'items': items, 'total': total})
-            except Exception as e:
-                return _make_rag_error_response(e, 'VectorStoreError', collection_id=collection_id)
+        if hasattr(PluginToRuntimeAction, 'VECTOR_LIST'):
+
+            @self.action(PluginToRuntimeAction.VECTOR_LIST)
+            async def vector_list(data: dict[str, Any]) -> handler.ActionResponse:
+                collection_id = data['collection_id']
+                filters = data.get('filters')
+                limit = data.get('limit', 20)
+                offset = data.get('offset', 0)
+                try:
+                    items, total = await self.ap.rag_runtime_service.vector_list(collection_id, filters, limit, offset)
+                    return handler.ActionResponse.success(data={'items': items, 'total': total})
+                except Exception as e:
+                    return _make_rag_error_response(e, 'VectorStoreError', collection_id=collection_id)
 
         @self.action(PluginToRuntimeAction.GET_KNOWLEDEGE_FILE_STREAM)
         async def get_knowledge_file_stream(data: dict[str, Any]) -> handler.ActionResponse:

tests/unit_tests/plugin/test_plugin_runtime_handler_compat.py

@@ -0,0 +1,20 @@
+from unittest.mock import AsyncMock, MagicMock
+
+
+def test_runtime_handler_allows_missing_vector_list_action_for_older_plugin_sdk():
+    from langbot_plugin.entities.io.actions.enums import PluginToRuntimeAction
+    from src.langbot.pkg.plugin.handler import RuntimeConnectionHandler
+
+    assert not hasattr(PluginToRuntimeAction, 'VECTOR_LIST')
+
+    mock_connection = MagicMock()
+    mock_app = MagicMock()
+    mock_app.logger = MagicMock()
+
+    handler = RuntimeConnectionHandler(
+        connection=mock_connection,
+        disconnect_callback=AsyncMock(return_value=False),
+        ap=mock_app,
+    )
+
+    assert handler is not None