Append-only registry rows (serializer/parser/dialect openai) plus a
_RAW_GUARDS table the pipeline consults before parse for same-family
providers. Request gate: 17 identical rows against v1 in-process
(map_openai_params + transform_request) and 17 asserted typed
fallbacks. Response gate: 5 identical rows against
convert_to_model_response_object (the live SDK-path normalizer) plus
loud-error rows for unreachable shapes. Stream gate: byte-identical
replays through the real CustomStreamWrapper over SDK chunks, an
SSE-line decode equivalence check, and the pinned usage-tail seam
contract. DIFFERENTIAL_REPORT.md regenerated: 0 divergent rows.
mateo-berri
91a84b7edf