diff --git a/backend/open_webui/main.py b/backend/open_webui/main.py
index fb075886a2..d47c88fc54 100644
--- a/backend/open_webui/main.py
+++ b/backend/open_webui/main.py
@@ -1796,7 +1796,9 @@ async def chat_completion(
 
         if metadata.get('chat_id') and user:
             chat_id = metadata['chat_id']
-            if not chat_id.startswith('local:') and not chat_id.startswith('channel:'):  # temporary/channel chats are not stored
+            if not chat_id.startswith('local:') and not chat_id.startswith(
+                'channel:'
+            ):  # temporary/channel chats are not stored
                 if is_new_chat:
                     # Build the full history upfront with ALL assistant placeholders
                     user_message = metadata.get('user_message') or {}
diff --git a/backend/open_webui/routers/channels.py b/backend/open_webui/routers/channels.py
index 757f999c25..70eb799ea6 100644
--- a/backend/open_webui/routers/channels.py
+++ b/backend/open_webui/routers/channels.py
@@ -59,7 +59,6 @@ from open_webui.utils.models import (
 )
 
 
-
 from open_webui.utils.auth import get_admin_user, get_verified_user
 from open_webui.utils.access_control import has_permission, filter_allowed_access_grants
 from open_webui.utils.webhook import post_webhook
@@ -1017,9 +1016,7 @@ async def model_response_handler(request, channel, message, user, db=None):
                 # tools, filters, RAG — everything. The pipeline runs as
                 # an async task; the channel emitter handles progressive
                 # message updates via socket events.
-                await request.app.state.CHAT_COMPLETION_HANDLER(
-                    request, form_data, user=user
-                )
+                await request.app.state.CHAT_COMPLETION_HANDLER(request, form_data, user=user)
 
             except Exception as e:
                 log.exception(e)
diff --git a/backend/open_webui/socket/main.py b/backend/open_webui/socket/main.py
index 918330e3b1..d59ff53277 100644
--- a/backend/open_webui/socket/main.py
+++ b/backend/open_webui/socket/main.py
@@ -891,11 +891,7 @@ async def _make_channel_emitter(request_info):
 
         elif event_type == 'chat:message:error':
             error = event_data.get('data', {}).get('error', {})
-            error_content = (
-                error.get('content', 'An error occurred')
-                if isinstance(error, dict)
-                else str(error)
-            )
+            error_content = error.get('content', 'An error occurred') if isinstance(error, dict) else str(error)
             await _emit_channel_update(f'Error: {error_content}', done=True)
 
     return __channel_emitter__
diff --git a/backend/open_webui/utils/middleware.py b/backend/open_webui/utils/middleware.py
index 2efc0d54f9..56226fc226 100644
--- a/backend/open_webui/utils/middleware.py
+++ b/backend/open_webui/utils/middleware.py
@@ -3058,7 +3058,11 @@ async def background_tasks_handler(ctx):
     message = None
     messages = []
 
-    if 'chat_id' in metadata and not metadata['chat_id'].startswith('local:') and not metadata['chat_id'].startswith('channel:'):
+    if (
+        'chat_id' in metadata
+        and not metadata['chat_id'].startswith('local:')
+        and not metadata['chat_id'].startswith('channel:')
+    ):
         messages_map = await Chats.get_messages_map_by_chat_id(metadata['chat_id'])
         message = messages_map.get(metadata['message_id']) if messages_map else None
 
@@ -3138,7 +3142,9 @@ async def background_tasks_handler(ctx):
                             }
                         )
 
-                        if not metadata.get('chat_id', '').startswith('local:') and not metadata.get('chat_id', '').startswith('channel:'):
+                        if not metadata.get('chat_id', '').startswith('local:') and not metadata.get(
+                            'chat_id', ''
+                        ).startswith('channel:'):
                             await Chats.upsert_message_to_chat_by_id_and_message_id(
                                 metadata['chat_id'],
                                 metadata['message_id'],
@@ -3150,7 +3156,9 @@ async def background_tasks_handler(ctx):
                     except Exception as e:
                         pass
 
-            if not metadata.get('chat_id', '').startswith('local:') and not metadata.get('chat_id', '').startswith('channel:'):  # Only update titles and tags for non-temp chats
+            if not metadata.get('chat_id', '').startswith('local:') and not metadata.get('chat_id', '').startswith(
+                'channel:'
+            ):  # Only update titles and tags for non-temp chats
                 if TASKS.TITLE_GENERATION in tasks:
                     user_message = get_last_user_message(messages)
                     if user_message and len(user_message) > 100:
@@ -3453,7 +3461,11 @@ async def non_streaming_chat_response_handler(response, ctx):
                         }
                     )
 
-                    title = await Chats.get_chat_title_by_id(metadata['chat_id']) if not metadata['chat_id'].startswith('channel:') else ''
+                    title = (
+                        await Chats.get_chat_title_by_id(metadata['chat_id'])
+                        if not metadata['chat_id'].startswith('channel:')
+                        else ''
+                    )
 
                     # Use output from backend if provided (OR-compliant backends),
                     # otherwise generate from response content
@@ -5026,7 +5038,11 @@ async def streaming_chat_response_handler(response, ctx):
                     if item.get('status') == 'in_progress':
                         item['status'] = 'completed'
 
-                title = await Chats.get_chat_title_by_id(metadata['chat_id']) if not metadata['chat_id'].startswith('channel:') else ''
+                title = (
+                    await Chats.get_chat_title_by_id(metadata['chat_id'])
+                    if not metadata['chat_id'].startswith('channel:')
+                    else ''
+                )
                 data = {
                     'done': True,
                     'content': serialize_output(output),