Internal
Serializes observation metadata into the single JSON value written to the langfuse.observation.metadata span attribute.
langfuse.observation.metadata
Object metadata is serialized with serializeObservationMetadataEntries: keys with null, undefined, function or symbol values are skipped, and keys beyond MAX_OBSERVATION_METADATA_KEYS are dropped with a warning.
null
undefined
Metadata to serialize
JSON string, or undefined if there is no metadata to write
Serializes observation metadata into the single JSON value written to the
langfuse.observation.metadataspan attribute.Object metadata is serialized with serializeObservationMetadataEntries: keys with
null,undefined, function or symbol values are skipped, and keys beyond MAX_OBSERVATION_METADATA_KEYS are dropped with a warning.