Add Web PubSub Chat service client

.chronus/changes/webpubsub-chat-customization-2026-08-17.md

@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - azure-messaging-webpubsubchatservice
+---
+
+Add the first version of Web PubSub Chat service client.

eng/ignore-links.txt

@@ -6,3 +6,8 @@ http://localhost:8000/samples/pyodide_integration
 https://pypi.org/project/azure-mynewpackage/
 https://aka.ms/azsdk/python/migrate/my-new-package
 https://github.com/Azure/azure-sdk-for-python/compare/main..
+https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/webpubsub/azure-messaging-webpubsubchatservice
+https://pypi.org/project/azure-messaging-webpubsubchatservice/
+https://learn.microsoft.com/python/api/overview/azure/messaging-webpubsubchatservice-readme?view=azure-python-preview
+https://github.com/Azure/azure-sdk-for-python/tree/main/sdk/webpubsub/azure-messaging-webpubsubchatservice/samples
+https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/webpubsub/azure-messaging-webpubsubchatservice/CHANGELOG.md

sdk/webpubsub/azure-messaging-webpubsubchatservice/CHANGELOG.md

@@ -0,0 +1,15 @@
+# Release History
+
+## 1.0.0b1 (Unreleased)
+
+### Features Added
+
+  - Initial preview release of the Azure Web PubSub Chat Service client library for Python
+  - Added connection string, access key, and Microsoft Entra ID authentication
+  - Added client access token generation for connected Chat clients
+  - Added built-in Chat role and permission constants
+  - Support for room management (create, get, update, delete rooms)
+  - Support for user management (create, get, delete users)
+  - Support for room membership management (add, list, delete room members)
+  - Support for message operations (list, update, delete messages)
+  - Support for role-based access control (create, get, list, delete roles)

sdk/webpubsub/azure-messaging-webpubsubchatservice/LICENSE

@@ -0,0 +1,21 @@
+Copyright (c) Microsoft Corporation.
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

sdk/webpubsub/azure-messaging-webpubsubchatservice/MANIFEST.in

@@ -0,0 +1,8 @@
+include *.md
+include LICENSE
+include azure/messaging/webpubsubservice/chat/py.typed
+recursive-include tests *.py
+recursive-include samples *.py *.md
+recursive-include doc *.rst
+include azure/__init__.py
+include azure/messaging/__init__.py