import type { ArkmeSourceItem } from './types.js';
/** Chat selects the latest activity; admission hints and the roster are not display facts. */
export declare function arkmeChatActivityPreview(bundle: Record<string, unknown>, viewerUserId: number): Pick<ArkmeSourceItem, 'latestPreview' | 'latestActivityAtMillis' | 'latestActivityKind'>;
/** Member activities do not advance message sequence. Keep their freshness separate. */
export declare function retainNewerArkmeChatActivity(previous: ArkmeSourceItem | undefined, incoming: ArkmeSourceItem): ArkmeSourceItem;
//# sourceMappingURL=chat-activity-preview.d.ts.map