diff --git a/src/langbot/pkg/api/http/controller/groups/knowledge/migration.py b/src/langbot/pkg/api/http/controller/groups/knowledge/migration.py
index 68faa00b..fdcf2568 100644
--- a/src/langbot/pkg/api/http/controller/groups/knowledge/migration.py
+++ b/src/langbot/pkg/api/http/controller/groups/knowledge/migration.py
@@ -47,9 +47,9 @@ class KnowledgeMigrationRouterGroup(group.RouterGroup):
             return result.scalar()
         else:
             result = await self.ap.persistence_mgr.execute_async(
-                sqlalchemy.text(
-                    "SELECT name FROM sqlite_master WHERE type='table' AND name=:table_name;"
-                ).bindparams(table_name=table_name)
+                sqlalchemy.text("SELECT name FROM sqlite_master WHERE type='table' AND name=:table_name;").bindparams(
+                    table_name=table_name
+                )
             )
             return result.first() is not None
 
@@ -231,9 +231,7 @@ class KnowledgeMigrationRouterGroup(group.RouterGroup):
                 )
 
                 try:
-                    await self.ap.plugin_connector.rag_on_kb_create(
-                        external_plugin_id, kb_uuid, retriever_config
-                    )
+                    await self.ap.plugin_connector.rag_on_kb_create(external_plugin_id, kb_uuid, retriever_config)
                     task_context.trace(f'Restored external KB: {name} ({kb_uuid})')
                 except Exception as e:
                     warning = f'Failed to notify plugin for external KB {name} ({kb_uuid}): {e}'
diff --git a/src/langbot/pkg/persistence/migrations/dbm020_knowledge_engine_plugin_architecture.py b/src/langbot/pkg/persistence/migrations/dbm020_knowledge_engine_plugin_architecture.py
index de10df9d..616cb91a 100644
--- a/src/langbot/pkg/persistence/migrations/dbm020_knowledge_engine_plugin_architecture.py
+++ b/src/langbot/pkg/persistence/migrations/dbm020_knowledge_engine_plugin_architecture.py
@@ -59,18 +59,14 @@ class DBMigrateKnowledgeEnginePluginArchitecture(migration.DBMigration):
 
     async def _backup_knowledge_bases(self) -> bool:
         """Backup knowledge_bases data. Returns True if data was backed up."""
-        result = await self.ap.persistence_mgr.execute_async(
-            sqlalchemy.text('SELECT COUNT(*) FROM knowledge_bases;')
-        )
+        result = await self.ap.persistence_mgr.execute_async(sqlalchemy.text('SELECT COUNT(*) FROM knowledge_bases;'))
         count = result.scalar()
         if count == 0:
             return False
 
         # Drop backup table if it already exists (from a previous failed migration)
         if await self._table_exists('knowledge_bases_backup'):
-            await self.ap.persistence_mgr.execute_async(
-                sqlalchemy.text('DROP TABLE knowledge_bases_backup;')
-            )
+            await self.ap.persistence_mgr.execute_async(sqlalchemy.text('DROP TABLE knowledge_bases_backup;'))
 
         await self.ap.persistence_mgr.execute_async(
             sqlalchemy.text('CREATE TABLE knowledge_bases_backup AS SELECT * FROM knowledge_bases;')
@@ -103,9 +99,7 @@ class DBMigrateKnowledgeEnginePluginArchitecture(migration.DBMigration):
 
     async def _clear_knowledge_bases(self):
         """Clear all rows from knowledge_bases table (preserve table structure)."""
-        await self.ap.persistence_mgr.execute_async(
-            sqlalchemy.text('DELETE FROM knowledge_bases;')
-        )
+        await self.ap.persistence_mgr.execute_async(sqlalchemy.text('DELETE FROM knowledge_bases;'))
 
     async def _add_columns_to_knowledge_bases(self):
         """Add new RAG plugin architecture columns to knowledge_bases table."""
@@ -154,15 +148,11 @@ class DBMigrateKnowledgeEnginePluginArchitecture(migration.DBMigration):
         row = result.first()
         if row is not None:
             await self.ap.persistence_mgr.execute_async(
-                sqlalchemy.text(
-                    "UPDATE metadata SET value = 'true' WHERE key = 'rag_plugin_migration_needed';"
-                )
+                sqlalchemy.text("UPDATE metadata SET value = 'true' WHERE key = 'rag_plugin_migration_needed';")
             )
         else:
             await self.ap.persistence_mgr.execute_async(
-                sqlalchemy.text(
-                    "INSERT INTO metadata (key, value) VALUES ('rag_plugin_migration_needed', 'true');"
-                )
+                sqlalchemy.text("INSERT INTO metadata (key, value) VALUES ('rag_plugin_migration_needed', 'true');")
             )
         self.ap.logger.info('Set rag_plugin_migration_needed=true in metadata.')