fix: use child task IDs in a2a_mcp workflows - #693
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Signed-off-by: Anas Khan <83116240+anxkhn@users.noreply.github.com>
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Summary
WorkflowNode.run_nodeforwarded the orchestrator's task ID to child agents. A2A interprets that ID as an existing task on the receiving agent, so the first child request failed withTaskNotFoundErrorbecause the child did not own that task.This change stops
OrchestratorAgentfrom assigning its task ID to graph nodes.WorkflowNode.run_nodenow omitstaskIdon the first child request, records the child-local ID returned by the stream, and reuses that ID when resuming work with the same child. The payload and task-ID extraction logic live ina2a_mcp/common/child_message.py.Regression tests cover initial requests, resumed requests, streamed child task IDs, and node attribute handling.
Testing
uv run --no-sync pytest samples/python/agents/a2a_mcp/tests/test_workflow_task_id.py --verboseAll five tests pass.