Update ai-projects SDK samples to use agent endpoint for agent responses and conversa…

[luigiw]

…tions calls

Description

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• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull request overview

This PR updates the azure-ai-projects SDK samples so that Responses and Conversations calls are routed through an agent-scoped OpenAI client (get_openai_client(agent_name=...)) instead of identifying the agent inline via extra_body={"agent_reference": ...}. This aligns the samples with the agent-endpoint routing behavior of the client, where agent_name points the client's base_url at the agent's endpoint and requires allow_preview=True.

Changes:

• Add allow_preview=True to AIProjectClient construction in the affected samples (where not already present).
• Replace project_client.get_openai_client() with project_client.get_openai_client(agent_name=...), either inline in the with header or as a separate agent_client when a project-scoped client is still needed.
• Remove the now-redundant extra_body={"agent_reference": ...} from responses.create()/conversations.create() calls, while preserving other extra_body keys such as structured_inputs.

Show a summary per file

File	Description
samples/hosted_agents/sample_skill_in_toolbox.py	Use agent_name=AGENT_NAME client; drop agent_reference
samples/evaluations/sample_continuous_evaluation_rule.py	Add agent-scoped agent_client; keep openai_client for evals
samples/evaluations/sample_agent_response_evaluation.py	Add agent-scoped agent_client for responses/conversations
samples/evaluations/sample_agent_response_evaluation_with_function_tool.py	Add agent-scoped agent_client; keep openai_client for evals
samples/datasets/sample_dataset_generation_job_traces_for_finetuning.py	Add agent_client; keep openai_client for file ops
samples/datasets/sample_dataset_generation_job_traces_for_evaluation.py	Single agent-scoped client for seeding traces
samples/agents/tools/sample_toolboxes_with_search_preview*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_work_iq*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_web_search*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_to_agent.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_sharepoint.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_openapi*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_memory_search*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_mcp*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_image_generation*.py	Agent-scoped client; keep extra_headers
samples/agents/tools/sample_agent_function_tool*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_file_search*.py	Add agent_client; keep openai_client for vector store/files
samples/agents/tools/sample_agent_fabric*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_computer_use*.py	Agent-scoped client; keep truncation
samples/agents/tools/sample_agent_code_interpreter*.py	Agent-scoped client; preserve structured_inputs
samples/agents/tools/sample_agent_browser_automation.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_bing_*.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_azure_function.py	Agent-scoped client; drop agent_reference
samples/agents/tools/sample_agent_ai_search.py	Agent-scoped client; drop agent_reference
samples/agents/telemetry/sample_agent_basic_with_*_tracing.py	Agent-scoped client; drop agent_reference
samples/agents/sample_workflow_multi_agent*.py	Workflow-scoped client via agent_name
samples/agents/sample_agent_structured_output*.py	Agent-scoped client; drop agent_reference
samples/agents/sample_agent_stream_events.py	Agent-scoped client; drop agent_reference
samples/agents/sample_agent_retrieve_basic*.py	Agent-scoped client via yielded agent_name
samples/agents/sample_agent_basic*.py	Agent-scoped client; drop agent_reference

Review details

• Files reviewed: 58/58 changed files
• Comments generated: 0
• Review effort level: Medium