Python: Add OrcaRouter provider samples

[nissrin2020ali-ux]

Motivation & Context

Adding OrcaRouter as a first-class provider sample lets Microsoft Agent Framework users drive the OrcaRouter gateway directly through the OpenAI-compatible clients they already use, instead of treating it as an anonymous custom base URL.

OrcaRouter is an OpenAI-compatible AI gateway built for both models and agents. Like OpenRouter, it exposes a provider/model namespace across many models — but it also combines adaptive routing, automatic failover, zero-markup inference, observability, guardrails, and agent-tool governance behind the same endpoint. It runs gateway-level, zero-trust security for AI agents on the same endpoint — screening every prompt/response and governing every tool call on a default-deny basis, with no application code changes. Adding orcarouter/ to the provider samples means MAF users can adopt that stack in a single client call.

Description & Review Guide

• What are the major changes? A new python/samples/02-agents/providers/orcarouter/ folder with two runnable samples, plus a link row in the providers overview README.
• What is the impact of these changes? Documentation-only sample additions; no runtime code is touched, so there is no API or behavior impact.
• What do you want reviewers to focus on? Whether the samples match the existing convention for OpenAI-compatible providers in this repo (e.g. providers/ollama/ollama_with_openai_chat_client.py), and the env-var naming.

The samples point the base_url of OpenAIChatCompletionClient / OpenAIChatClient at https://api.orcarouter.ai/v1 and pick a gateway model such as orcarouter/fusion. Both cover streaming and tool calling. I verified both samples end-to-end against the gateway — the Chat Completions and the Responses API paths both complete successfully. uv run poe syntax --samples --check and --format pass, and type checks report no findings for the new files.

Files added:

• python/samples/02-agents/providers/orcarouter/README.md
• python/samples/02-agents/providers/orcarouter/orcarouter_agent_with_openai_chat_client.py
• python/samples/02-agents/providers/orcarouter/orcarouter_agent_with_responses_client.py

Related Issue

No related issue.

Contribution Checklist

• The code builds clean without any errors or warnings
• All unit tests pass, and I have added new tests where possible
• The PR follows the Contribution Guidelines
• This PR is linked to an issue and there is no other open PR for this issue (see Related Issue above).
• This is not a breaking change. If it is a breaking change, add the breaking change label (or add "[BREAKING]" to the title prefix, before or after any language prefix) — a workflow keeps the label and title prefix in sync automatically.

Discord: discord.gg/YEubt8enRA · X: https://x.com/OrcaRouter

I'm an engineer on the OrcaRouter team.

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[Copilot]

Pull request overview

Adds OrcaRouter integration samples using Agent Framework’s OpenAI-compatible clients.

Changes:

• Adds Chat Completions and Responses API samples.
• Demonstrates streaming and Chat Completions tool calling.
• Documents OrcaRouter configuration and provider discovery.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
python/samples/02-agents/providers/README.md	Links the OrcaRouter samples.
python/samples/02-agents/providers/orcarouter/README.md	Documents setup and configuration.
python/samples/02-agents/providers/orcarouter/orcarouter_agent_with_openai_chat_client.py	Adds a tool-enabled Chat Completions sample.
python/samples/02-agents/providers/orcarouter/orcarouter_agent_with_responses_client.py	Adds a Responses API sample.

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