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Giles Odigwe
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* Reorganize A2A samples: client demos in 02-agents, use package A2AExecutor - Move client samples (agent_with_a2a, a2a_agent_as_function_tools) to samples/02-agents/a2a/ - Add new concept samples: polling, stream reconnection, protocol selection - Replace sample agent_executor.py with package-level A2AExecutor (stream=True) - Update 04-hosting/a2a to focus on server-side, point to 02-agents for clients - Add README.md for the new 02-agents/a2a/ sample collection Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Fix streaming artifact coalescing and address PR review feedback A2AExecutor fix: - Generate a stable artifact_id per stream in _run_stream so all streaming chunks share the same ID, enabling proper append=True coalescing per the A2A spec (TaskArtifactUpdateEvent with same artifactId). - Previously, item.message_id was None for OpenAI/Foundry streaming updates, causing the SDK to generate a new random UUID per token (100+ separate artifacts instead of 1 appended artifact). Sample improvements: - Replace join workaround with response.text now that coalescing works - Add background=True to stream reconnection resume call (required for continuation token emission on in-progress tasks) - Fix type ignore specificity in polling sample Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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A2A Client Samples
These samples demonstrate how to consume remote A2A-compliant agents using the Agent Framework's A2AAgent class.
For hosting your own agents as A2A servers, see samples/04-hosting/a2a/.
Samples
| Sample | Concept |
|---|---|
agent_with_a2a.py |
Basic consumption — non-streaming and streaming |
a2a_agent_as_function_tools.py |
Expose A2A skills as function tools for a host agent |
a2a_polling.py |
Poll a long-running task with continuation tokens |
a2a_stream_reconnection.py |
Resume an interrupted stream via continuation token |
a2a_protocol_selection.py |
Configure preferred protocol bindings (JSONRPC, GRPC, HTTP+JSON) |
Prerequisites
- A running A2A-compliant agent server (see
samples/04-hosting/a2a/to start one) - Set
A2A_AGENT_HOSTenvironment variable to the server URL - For
a2a_agent_as_function_tools.py: also setFOUNDRY_PROJECT_ENDPOINTandFOUNDRY_MODEL
Running
cd python/samples/02-agents/a2a
# Start an A2A server in another terminal first:
# cd python/samples/04-hosting/a2a && uv run python a2a_server.py
export A2A_AGENT_HOST="http://localhost:5001/"
uv run python agent_with_a2a.py
Key APIs
from agent_framework.a2a import A2AAgent
# Connect to a remote agent
async with A2AAgent(url="http://localhost:5001/", agent_card=card) as agent:
# Non-streaming
response = await agent.run("Hello")
# Streaming
stream = agent.run("Hello", stream=True)
async for update in stream:
print(update.text)
# Background + polling
response = await agent.run("Long task", background=True)
while response.continuation_token:
response = await agent.poll_task(response.continuation_token)