Python: [BREAKING] Python: Provider-leading client design & OpenAI package extraction (#4818)

* Python: Provider-leading client design & OpenAI package extraction

Major refactoring of the Python Agent Framework client architecture:

- Extract OpenAI clients into new `agent-framework-openai` package
- Core package no longer depends on openai, azure-identity, azure-ai-projects
- Rename clients for discoverability: OpenAIResponsesClient → OpenAIChatClient,
  OpenAIChatClient → OpenAIChatCompletionClient
- Unify `model_id`/`deployment_name`/`model_deployment_name` → `model` param
- New FoundryChatClient for Azure AI Foundry Responses API
- New FoundryAgent/FoundryAgentClient for connecting to pre-configured Foundry agents
- Remove OpenAIBase/OpenAIConfigMixin from non-deprecated client MRO
- Deprecate AzureOpenAI* clients, AzureAIClient, OpenAIAssistantsClient
- Reorganize samples: azure_openai+azure_ai+azure_ai_agent → azure/
- ADR-0020: Provider-Leading Client Design

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: missing Agent imports in samples, .model_id → .model in foundry_local sample

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: CI failures — mypy errors, coverage targets, sample imports

- azure-ai mypy: add type ignores for TypedDict total=, model arg, forward ref
- Coverage: replace core.azure/openai targets with openai package target
- project_provider: add type annotation for opts dict

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix: populate openai .pyi stub, fix broken README links, coverage targets

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fixes

* updated observabilitty

* reset azure init.pyi

* fix errors

* updated adr number

* fix foundry local

* fixed not renamed docstrings and comments, and added deprecated markers to old classes

* fix tests and pyprojects

* fix test vars

* updated function tests

* update durable

* updated test setup for functions

* Fix Foundry auth in workflow samples

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Stabilize Python integration workflows

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Update hosting samples for Foundry

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Trigger full CI rerun

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Trigger CI rerun again

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* trigger rerun

* trigger rerun

* fix for litellm

* undo durabletask changes

* Move Foundry APIs into foundry namespace

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix Foundry pyproject formatting

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Split provider samples by Foundry surface

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Restore hosting sample requirements

Also fix the Foundry Local sample link after the provider sample move.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* updated tests

* udpated foundry integration tests

* removed dist from azurefunctions tests

* Use separate Foundry clients for concurrent agents

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix client setup in azfunc and durable

* disabled two tests

* updated setup for some function and durable tests

* improved azure openai setup with new clients

* ignore deprecated

* fixes

* skip 11

* remove openai assistants int tests

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/samples/04-hosting/azure_functions/02_multi_agent/function_app.py

@@ -1,21 +1,22 @@
 # Copyright (c) Microsoft. All rights reserved.
 
-"""Host multiple Azure OpenAI agents inside a single Azure Functions app.
+"""Host multiple Foundry-powered agents inside a single Azure Functions app.
 
 Components used in this sample:
-- AzureOpenAIChatClient to create agents bound to a shared Azure OpenAI deployment.
+- FoundryChatClient to create agents bound to a shared Foundry deployment.
 - AgentFunctionApp to register multiple agents and expose dedicated HTTP endpoints.
 - Custom tool functions to demonstrate tool invocation from different agents.
 
-Prerequisites: set `AZURE_OPENAI_ENDPOINT` and `AZURE_OPENAI_CHAT_DEPLOYMENT_NAME`, plus either
-`AZURE_OPENAI_API_KEY` or authenticate with Azure CLI before starting the Functions host."""
+Prerequisites: set `FOUNDRY_PROJECT_ENDPOINT`, `FOUNDRY_MODEL`, and sign in with Azure CLI before starting the Functions host."""
 
 import logging
+import os
 from typing import Any
 
-from agent_framework import tool
-from agent_framework.azure import AgentFunctionApp, AzureOpenAIChatClient
-from azure.identity import AzureCliCredential
+from agent_framework import Agent, tool
+from agent_framework.azure import AgentFunctionApp
+from agent_framework.foundry import FoundryChatClient
+from azure.identity.aio import AzureCliCredential
 from dotenv import load_dotenv
 
 # Load environment variables from .env file
@@ -59,15 +60,21 @@ def calculate_tip(bill_amount: float, tip_percentage: float = 15.0) -> dict[str,
 
 
 # 1. Create multiple agents, each with its own instruction set and tools.
-client = AzureOpenAIChatClient(credential=AzureCliCredential())
+client = FoundryChatClient(
+    project_endpoint=os.environ["FOUNDRY_PROJECT_ENDPOINT"],
+    model=os.environ["FOUNDRY_MODEL"],
+    credential=AzureCliCredential(),
+)
 
-weather_agent = client.as_agent(
+weather_agent = Agent(
+    client=client,
     name="WeatherAgent",
     instructions="You are a helpful weather assistant. Provide current weather information.",
     tools=[get_weather],
 )
 
-math_agent = client.as_agent(
+math_agent = Agent(
+    client=client,
     name="MathAgent",
     instructions="You are a helpful math assistant. Help users with calculations like tip calculations.",
     tools=[calculate_tip],

python/samples/04-hosting/azure_functions/02_multi_agent/local.settings.json.template

@@ -5,8 +5,7 @@
     "AzureWebJobsStorage": "UseDevelopmentStorage=true",
     "DURABLE_TASK_SCHEDULER_CONNECTION_STRING": "Endpoint=http://localhost:8080;TaskHub=default;Authentication=None",
     "TASKHUB_NAME": "default",
-    "AZURE_OPENAI_ENDPOINT": "<AZURE_OPENAI_ENDPOINT>",
-    "AZURE_OPENAI_CHAT_DEPLOYMENT_NAME": "<AZURE_OPENAI_CHAT_DEPLOYMENT_NAME>",
-    "AZURE_OPENAI_API_KEY": "<AZURE_OPENAI_API_KEY>"
+    "FOUNDRY_PROJECT_ENDPOINT": "<FOUNDRY_PROJECT_ENDPOINT>",
+    "FOUNDRY_MODEL": "<FOUNDRY_MODEL>"
   }
 }

python/samples/04-hosting/azure_functions/02_multi_agent/requirements.txt

@@ -1,11 +1,13 @@
 # Agent Framework packages
-# To use the deployed version, uncomment the line below and comment out the local installation lines
+# To use the deployed version, uncomment the lines below and comment out the local installation lines
+# agent-framework-foundry
 # agent-framework-azurefunctions
 
 # Local installation (for development and testing)
 # Each package must be listed explicitly because pip doesn't resolve uv workspace sources.
 # Without explicit entries, pip would fetch transitive dependencies from PyPI instead of local source.
 -e ../../../../packages/core  # Core framework - base dependency for all packages
+-e ../../../../packages/foundry  # Foundry support - dependency for hosted chat/agent samples
 -e ../../../../packages/durabletask  # Durable Task support - dependency of azurefunctions
 -e ../../../../packages/azurefunctions  # Azure Functions integration - the main package for this sample