export type StreamingUpdateKind = "noop" | "append" | "replace";
export interface StreamingUpdate {
    kind: StreamingUpdateKind;
    nextText: string;
    emittedText: string;
}
export declare function mergeStreamingText(existing: string, incoming: string): string;
export declare function resolveStreamingUpdate(existing: string, incoming: string): StreamingUpdate;
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