From 3de07454b5a0f0b535d2edc844959aeedc83d933 Mon Sep 17 00:00:00 2001
From: Dan Wang <danwang@openai.com>
Date: Wed, 29 Oct 2025 15:51:05 -0700
Subject: [PATCH] Set python version to 3.10 and remove 3.11+ features

---
 chatkit/agents.py            | 2 +-
 chatkit/errors.py            | 4 ++--
 chatkit/server.py            | 3 +--
 chatkit/widgets.py           | 3 +--
 pyproject.toml               | 2 +-
 tests/helpers/mock_widget.py | 3 ++-
 6 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/chatkit/agents.py b/chatkit/agents.py
index 38543d1..eccdee1 100644
--- a/chatkit/agents.py
+++ b/chatkit/agents.py
@@ -11,7 +11,6 @@
     Generic,
     Sequence,
     TypeVar,
-    assert_never,
     cast,
 )
 
@@ -39,6 +38,7 @@
     Annotation as ResponsesAnnotation,
 )
 from pydantic import BaseModel, ConfigDict, SkipValidation, TypeAdapter
+from typing_extensions import assert_never
 
 from .server import stream_widget
 from .store import Store, StoreItemType
diff --git a/chatkit/errors.py b/chatkit/errors.py
index f5f1d23..386f9c9 100644
--- a/chatkit/errors.py
+++ b/chatkit/errors.py
@@ -1,9 +1,9 @@
 from abc import ABC
-from enum import StrEnum
+from enum import Enum
 
 
 # Not a closed enum, new error codes can and will be added as needed
-class ErrorCode(StrEnum):
+class ErrorCode(str, Enum):
     STREAM_ERROR = "stream.error"
 
 
diff --git a/chatkit/server.py b/chatkit/server.py
index fe29c66..c9a432f 100644
--- a/chatkit/server.py
+++ b/chatkit/server.py
@@ -9,7 +9,6 @@
     AsyncIterable,
     Callable,
     Generic,
-    assert_never,
 )
 
 import agents
@@ -20,7 +19,7 @@
     _HEADERS_OVERRIDE as responses_headers_override,
 )
 from pydantic import BaseModel, TypeAdapter
-from typing_extensions import TypeVar
+from typing_extensions import TypeVar, assert_never
 
 from chatkit.errors import CustomStreamError, StreamError
 
diff --git a/chatkit/widgets.py b/chatkit/widgets.py
index ecfc6b2..e991f2a 100644
--- a/chatkit/widgets.py
+++ b/chatkit/widgets.py
@@ -4,7 +4,6 @@
 from typing import (
     Annotated,
     Literal,
-    NotRequired,
 )
 
 from pydantic import (
@@ -13,7 +12,7 @@
     Field,
     model_serializer,
 )
-from typing_extensions import TypedDict
+from typing_extensions import NotRequired, TypedDict
 
 from chatkit.actions import ActionConfig
 
diff --git a/pyproject.toml b/pyproject.toml
index 6e49ace..ab50b34 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -87,7 +87,7 @@ include = ["."]
 exclude = ["**/.venv", "**/.pytest_cache"]
 venvPath = "."
 venv = ".venv"
-pythonVersion = "3.11"
+pythonVersion = "3.10"
 typeCheckingMode = "standard"
 
 [tool.setuptools]
diff --git a/tests/helpers/mock_widget.py b/tests/helpers/mock_widget.py
index c6ef892..2dde244 100644
--- a/tests/helpers/mock_widget.py
+++ b/tests/helpers/mock_widget.py
@@ -2,11 +2,12 @@
 import re
 import uuid
 from datetime import datetime, timedelta
-from typing import Annotated, Any, AsyncIterator, Callable, Literal, assert_never
+from typing import Annotated, Any, AsyncIterator, Callable, Literal
 
 from agents import Agent, Runner
 from anyio import sleep
 from pydantic import BaseModel, Field, TypeAdapter
+from typing_extensions import assert_never
 
 from chatkit.actions import Action, ActionConfig
 from chatkit.types import ThreadStreamEvent