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fix(compat): return A2A error codes from the v0.3 JSON-RPC adapter - #1369
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mykytanetipa merged 4 commits intoOct 26, 2026
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A2AErrors raised while handling v0.3 JSON-RPC requests fell through to the generic handler and were returned as -32603 InternalError, so v0.3 clients could not tell e.g. TaskNotFoundError (-32001) apart from a server failure. Map them to their JSON-RPC codes in the non-streaming and streaming paths, keeping -32603 for errors that have no v0.3 equivalent.
🧪 Code Coverage (vs
|
| Base | PR | Delta | |
|---|---|---|---|
| src/a2a/compat/v0_3/jsonrpc_adapter.py | 66.67% | 68.22% | 🟢 +1.55% |
| Total | 93.03% | 93.01% | 🔴 -0.03% |
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shwetangsinha0509
changed the title
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mykytanetipa
requested changes
Oct 25, 2026
Build _V03_ERROR_CODES from the members of types_v03.A2AError instead of a hand-maintained list, as suggested in review.
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Description
A2A errors raised while handling v0.3 JSON-RPC requests fell through to the generic
except ExceptioninJSONRPC03Adapterand were returned as-32603 InternalError. v0.3 clients could not distinguish e.g.TaskNotFoundError(-32001) from a server failure.This maps
A2AErrors to their JSON-RPC codes viaJSON_RPC_ERROR_CODE_MAPin both paths, matching whatJsonRpcDispatcherdoes for v1.0:handle_requestcatchesA2AErrorbefore the generic handler, and_generate_error_responsebuilds a v0.3JSONRPCErrorfrom itevent_generatoryields the mapped error event instead ofInternalErrorErrors that only exist in v1.0 (
-32008ExtensionSupportRequired,-32009VersionNotSupported) are not part of the v0.3 spec, so they still map to-32603. This keeps the existing expectation intests/integration/test_version_header.py.Tests (
tests/compat/v0_3/test_jsonrpc_app_compat.py):tasks/getnot found,tasks/cancelwithTaskNotFoundError/TaskNotCancelableError/UnsupportedOperationError, and an error raised mid-stream onmessage/stream. All fail onmainand pass with this change. Full suite passes locally;ruff check,ruff formatandty checkare clean.CONTRIBUTINGGuide.Fixes #1368 🦕