reproduction: bug: uiMessageChunkSchema strict validation breaks backward due to#17010
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reproduction: bug: uiMessageChunkSchema strict validation breaks backward due to#17010lgrammel wants to merge 1 commit into
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Bug
bug: uiMessageChunkSchema strict validation breaks backward due to providerMetadata addition
Reproduction
examples/ai-functions/src/reproduction/ui-message-chunk-forward-compatibility.tsas a minimal UI message stream parsing reproduction.tool-output-availablechunk parses, then simulates a newer server adding an optional stream-event key to the same chunk.providerMetadata, so the artifact usesoptionalFieldFromNewerServerto exercise the same strict-schema forward-compatibility failure described in bug: uiMessageChunkSchema strict validation breaks backward due to providerMetadata addition #13733.AI_TypeValidationErrorandunrecognized_keys: ["optionalFieldFromNewerServer"]instead of accepting or ignoring the new optional field.ai@6.0.119check also rejected the exact reportedproviderMetadatatool-output-availablechunk withAI_TypeValidationError.Related Issues
Reproduces #13733