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Add native A2A echo hosted-agent sample - #1066
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Hameed Kunkanoor (Hameedkunkanoor) wants to merge 1 commit into
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Hameed Kunkanoor (Hameedkunkanoor) wants to merge 1 commit into
Hameed Kunkanoor (Hameedkunkanoor) wants to merge 1 commit into
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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Hameed Kunkanoor (Hameedkunkanoor)
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October 12, 2026 14:43
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Hameed Kunkanoor (Hameedkunkanoor)
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Hosted A2A end-to-end validation passed on 2026-10-12. Validated against an active Foundry hosted-agent version:
This validates the full Foundry authentication, public A2A routing, container hosting, native SDK request handling, and response artifact path—not only local ASGI behavior. |
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🟡 Changes recommended
The sample depends on an unpublished package, omits required uv artifacts, and presents a hosted path that is not yet service-enabled.
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What changed in this PR
Adds a native A2A v1 echo agent to the Python Bring Your Own hosted-agent samples.
Changes:
- Implements the A2A echo server and validation client.
- Adds deployment, dependency, and usage documentation.
- Registers the sample while excluding unsupported cloud CI execution.
| File | Description |
|---|---|
.azure-pipelines/scripts/hosted-agent-samples-ci-skiplist |
Excludes A2A from generic cloud CI. |
samples/python/hosted-agents/README.md |
Adds A2A to the sample index. |
.../echo/AGENTS.md |
Documents contributor workflows. |
.../echo/CLAUDE.md |
Redirects instructions to AGENTS.md. |
.../echo/README.md |
Documents setup, deployment, and validation. |
.../echo/azure.yaml |
Defines the hosted A2A deployment. |
.../echo/src/echo-a2a/.agentignore |
Excludes local Python artifacts. |
.../echo/src/echo-a2a/.azdignore |
Excludes local deployment artifacts. |
.../echo/src/echo-a2a/.gitignore |
Excludes generated local files. |
.../echo/src/echo-a2a/main.py |
Implements the native echo executor and host. |
.../echo/src/echo-a2a/requirements.txt |
Pins runtime dependencies. |
.../echo/src/echo-a2a/test_client.py |
Adds local and hosted A2A validation. |
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| $endpoint = "$projectEndpoint/agents/echo-a2a/endpoint/protocols/a2a" | ||
| ``` | ||
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| Run the dedicated hosted E2E client: |
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| # This file was autogenerated by uv via the following command: | ||
| # uv export --frozen --no-dev --no-emit-project --format requirements-txt --no-hashes --output-file requirements.txt |
| | **SDK** | `agent-framework-foundry-hosting` (includes core, openai, foundry, orchestrations) | `langchain-azure-ai[hosting]` (`ResponsesHostServer` / `InvocationsHostServer`) | `azure-ai-agentserver-responses` / `azure-ai-agentserver-invocations` / `azure-ai-agentserver-a2a`, or `azure-ai-agentserver-core` for fully custom HTTP | | ||
| | **Foundry integration** | Native — sessions, tools, memory, streaming all built in | Native via `langchain_azure_ai.agents.hosting` — sessions, streaming, and tool-call surfacing built in for LangGraph agents (`create_agent`) and custom `StateGraph`s | Core adapter hosts the web server and exposes `/invocations` and `/responses` endpoints; you supply the agent logic | | ||
| | **Protocols** | Responses and Invocations | Responses and Invocations | Responses and Invocations | | ||
| | **Protocols** | Responses and Invocations | Responses and Invocations | Responses, Invocations, and A2A | |
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Summary
Adds a minimal native A2A v1 echo agent to the Python Bring Your Own hosted-agent samples.
The sample demonstrates:
a2a-sdkAgent Card, JSON-RPC, Task, artifact, and executor behavior;azure-ai-agentserver-a2aon Foundry's canonical A2A routes;azd;Dependency
This PR depends on Azure/azure-sdk-for-python#49491 and publication of
azure-ai-agentserver-a2a==1.0.0b1to PyPI. Until publication, the repository's--resolvedependency policy check is expected to reportPYREQ012; the committed artifact intentionally uses the final public package pin rather than a nonportable local wheel.The sample is listed in the hosted-agent cloud CI skip list because the shared runner currently supports only Responses and Invocations. A2A requires Agent Card discovery plus JSON-RPC Task handling, which the sample's dedicated
test_client.pyprovides.Validation
/readinessprobe — passedEcho: hello from sample validation)git diff --check— passedPYREQ012untilazure-ai-agentserver-a2a==1.0.0b1is publishedRelated PR