Diego Rodrigues de Sa e Souza 71093eda77 fix(codex): keep parallel_tool_calls:false on translated Responses Lite path (#11707) (#11984) ...

enforceCodexResponsesLiteParallelToolCalls() forces parallel_tool_calls:false
at the top of CodexExecutor.execute(), but transformRequest() early-returns
the body before its RESPONSES_API_ALLOWLIST field filter only when
_nativeCodexPassthrough is set. Any request that reaches the codex
executor via the translated (non-native-passthrough) path never gets that
flag, so the allowlist filter silently deleted parallel_tool_calls right
before the fetch body was sent, reproducing the reported upstream
rejection ('X-OpenAI-Internal-Codex-Responses-Lite requires
parallel_tool_calls to be false') for every model.

Add parallel_tool_calls to RESPONSES_API_ALLOWLIST so the value survives
the translated path too. Update the sibling #2608 allowlist test that
previously asserted parallel_tool_calls gets stripped like other Chat
Completions-only fields -- it is a legitimate Responses API field that
must now survive.

Co-authored-by: Markus Hartung <mail@hartmark.se>

2026-08-29 08:10:26 -03:00

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