A breaking change has been introduced in the v1alpha surface: the family property within WidgetConfigUiSettingsModelConfigInfoResolvedModel is now marked as readOnly and immutable. Developers should ensure their write requests do not depend on modifying this field.
On the feature side, Discovery Engine now supports resourceAccessControlConfig across v1, v1beta, and v1alpha. By enabling dataStoreAccessControlEnabled, Gemini Enterprise users will only see data stores and connectors for which they possess the required IAM .get permissions. Additionally, SearchRequest now includes a SearchAsYouTypeSpec (v1alpha/v1beta), allowing developers to override data-store-level scoring by specifying custom field weights and a scoreThreshold on a per-query basis. Finally, v1alpha adds userSuppliedSobiArtifactReference to QueryPart for better integration with file attachments in long-running agent tasks.
