diff --git a/packages/jupyter-ai-magics/jupyter_ai_magics/models/persona.py b/packages/jupyter-ai-magics/jupyter_ai_magics/models/persona.py
index 54d45b7ce..fe25397b0 100644
--- a/packages/jupyter-ai-magics/jupyter_ai_magics/models/persona.py
+++ b/packages/jupyter-ai-magics/jupyter_ai_magics/models/persona.py
@@ -1,5 +1,6 @@
 from langchain.pydantic_v1 import BaseModel
 
+
 class Persona(BaseModel):
     """
     Model of an **agent persona**, a struct that includes the name & avatar
diff --git a/packages/jupyter-ai/jupyter_ai/chat_handlers/base.py b/packages/jupyter-ai/jupyter_ai/chat_handlers/base.py
index 973972c67..1ae80c5c5 100644
--- a/packages/jupyter-ai/jupyter_ai/chat_handlers/base.py
+++ b/packages/jupyter-ai/jupyter_ai/chat_handlers/base.py
@@ -16,11 +16,7 @@
 
 from dask.distributed import Client as DaskClient
 from jupyter_ai.config_manager import ConfigManager, Logger
-from jupyter_ai.models import (
-    AgentChatMessage,
-    ChatMessage,
-    HumanChatMessage,
-)
+from jupyter_ai.models import AgentChatMessage, ChatMessage, HumanChatMessage
 from jupyter_ai_magics import Persona
 from jupyter_ai_magics.providers import BaseProvider
 from langchain.pydantic_v1 import BaseModel
@@ -186,9 +182,7 @@ def reply(self, response: str, human_msg: Optional[HumanChatMessage] = None):
             time=time.time(),
             body=response,
             reply_to=human_msg.id if human_msg else "",
-            persona=Persona(
-                name=persona.name, avatar_route=persona.avatar_route
-            ),
+            persona=Persona(name=persona.name, avatar_route=persona.avatar_route),
         )
 
         for handler in self._root_chat_handlers.values():
diff --git a/packages/jupyter-ai/jupyter_ai/chat_handlers/help.py b/packages/jupyter-ai/jupyter_ai/chat_handlers/help.py
index d79c32fd7..e46038da5 100644
--- a/packages/jupyter-ai/jupyter_ai/chat_handlers/help.py
+++ b/packages/jupyter-ai/jupyter_ai/chat_handlers/help.py
@@ -45,9 +45,7 @@ def build_help_message(
         time=time.time(),
         body=_format_help_message(chat_handlers, persona, unsupported_slash_commands),
         reply_to="",
-        persona=Persona(
-            name=persona.name, avatar_route=persona.avatar_route
-        ),
+        persona=Persona(name=persona.name, avatar_route=persona.avatar_route),
     )
 
 
diff --git a/packages/jupyter-ai/jupyter_ai/extension.py b/packages/jupyter-ai/jupyter_ai/extension.py
index 3dea2af84..9abbf5e50 100644
--- a/packages/jupyter-ai/jupyter_ai/extension.py
+++ b/packages/jupyter-ai/jupyter_ai/extension.py
@@ -1,6 +1,6 @@
+import os
 import re
 import time
-import os
 
 from dask.distributed import Client as DaskClient
 from importlib_metadata import entry_points
@@ -31,12 +31,12 @@
     RootChatHandler,
 )
 
-
 JUPYTERNAUT_AVATAR_ROUTE = JupyternautPersona.avatar_route
 JUPYTERNAUT_AVATAR_PATH = str(
     os.path.join(os.path.dirname(__file__), "static", "jupyternaut.svg")
 )
 
+
 class AiExtension(ExtensionApp):
     name = "jupyter_ai"
     handlers = [
diff --git a/packages/jupyter-ai/jupyter_ai/models.py b/packages/jupyter-ai/jupyter_ai/models.py
index ff711a9cc..32353a694 100644
--- a/packages/jupyter-ai/jupyter_ai/models.py
+++ b/packages/jupyter-ai/jupyter_ai/models.py
@@ -1,7 +1,7 @@
 from typing import Any, Dict, List, Literal, Optional, Union
 
-from jupyter_ai_magics.providers import AuthStrategy, Field
 from jupyter_ai_magics import Persona
+from jupyter_ai_magics.providers import AuthStrategy, Field
 from langchain.pydantic_v1 import BaseModel, validator
 
 DEFAULT_CHUNK_SIZE = 2000