chore: import upstream snapshot with attribution

python/samples/02-agents/chat_client/chat_response_cancellation.py

@@ -0,0 +1,46 @@
+# Copyright (c) Microsoft. All rights reserved.
+
+import asyncio
+
+from agent_framework import Message
+from agent_framework.foundry import FoundryChatClient
+from azure.identity import AzureCliCredential
+from dotenv import load_dotenv
+
+# Load environment variables from .env file
+load_dotenv()
+
+"""
+Chat Response Cancellation Example
+
+Demonstrates proper cancellation of streaming chat responses during execution.
+Shows asyncio task cancellation and resource cleanup techniques.
+"""
+
+
+async def main() -> None:
+    """
+    Demonstrates cancelling a chat request after 1 second.
+    Creates a task for the chat request, waits briefly, then cancels it to show proper cleanup.
+
+    Configuration:
+    - FOUNDRY_PROJECT_ENDPOINT: Azure AI Foundry project endpoint URL
+    - FOUNDRY_MODEL: Model deployment name (e.g. gpt-4o)
+    - Authentication: Run `az login` to authenticate via AzureCliCredential
+    """
+    client = FoundryChatClient(credential=AzureCliCredential())
+
+    async def get_story_response() -> None:
+        await client.get_response(messages=[Message(role="user", contents=["Tell me a fantasy story."])])
+
+    try:
+        task = asyncio.create_task(get_story_response())
+        await asyncio.sleep(1)
+        task.cancel()
+        await task
+    except asyncio.CancelledError:
+        print("Request was cancelled")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())