feat: wire pydantic serializer through broker.publish - #7
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Match FastStream's broker convention: accept a SerializerProto on OutboxBroker, store it in FastDependsConfig, and pass the resolved value to encode_message. The EMPTY default resolves to PydanticSerializer, so broker.publish(pydantic_model, ...) now JSON-encodes instead of raising TypeError from the json_dumps fallback.
lesnik512
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Jul 17, 2026
architecture/metrics.md §Two-seam layering framed the recorder and native middleware as purely complementary, omitting that they overlap on the consume/publish series: both emit the same-named duration+count metrics, so one Prometheus registry raises Duplicated timeseries and live OTel meters on both double-count. Record the hazard, the separate-registries / middleware-as-source- of-truth fix, and why the library does not guard it at construction (the collision is raised upstream of the broker, and "both seams configured" is indistinguishable from the correct dual-registry setup). Cross-refs the setup doc, which already covers the operator side. Closes the last open item from the architecture review (candidate #7). Docs only. Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Match FastStream's broker convention: accept a SerializerProto on OutboxBroker, store it in FastDependsConfig, and pass the resolved value to encode_message. The EMPTY default resolves to PydanticSerializer, so broker.publish(pydantic_model, ...) now JSON-encodes instead of raising TypeError from the json_dumps fallback.