export declare const TRUNCATION_STOP_REASONS: readonly ["max_tokens", "length", "max_output_tokens"];
export declare function isTruncationStopReason(stopReason: string | null | undefined): boolean;
export declare function truncationNotice(droppedToolNames: string[], stopReason?: string | null, options?: {
    canIncreaseOutputLimit?: boolean;
}): string;