feat(a2a): propagate caller trace and job context on remote A2A calls#929
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Set the A2A client's default headers to carry the running job's W3C `traceparent` (`UIPATH_TRACE_ID`, parented at `UIPATH_PARENT_SPAN_ID` when set) and its `X-UiPath-JobKey`, so the remote proxy can correlate the call's spans with the calling job's trace and group them under that job. Nothing extra is sent outside a job context. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01ELDu3m5eaURJrMVarc8VfY
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What
Set the A2A client's default headers to carry the calling job's correlation context, so the remote A2A proxy can correlate the call's spans with the calling job's trace and group them under that job:
traceparent— the job's trace id (UIPATH_TRACE_ID, normalized to 32-char hex), parented at the job's root span (UIPATH_PARENT_SPAN_ID) when set, falling back to the current OTel span id or a minted span id.X-UiPath-JobKey— the job key (UIPATH_JOB_KEY), matching the header the runtime already sends to other UiPath proxies.Nothing extra is sent outside a job context. The
traceparentis set explicitly rather than relying on httpx auto-instrumentation, because the runtime binds the job trace id only at export time — the in-process OTel context carries a different id, so auto-propagation would send the wrong trace id.Tests
Unit tests for trace-id normalization, span-id coercion,
traceparentconstruction, and header assembly (tests/agent/tools/test_a2a_tool.py). Lint (ruff, custom httpx-client check) and the circular-import guard pass locally.🤖 Generated with Claude Code
https://claude.ai/code/session_01ELDu3m5eaURJrMVarc8VfY