export declare function formatJson(data: unknown): string;
export declare function formatDisplayValue(value: unknown, column?: {
    type?: unknown;
    scale?: number;
}): string;
export declare function normalizeOutput(value: unknown, column?: {
    type?: unknown;
    scale?: number;
}, seen?: Set<unknown>, depth?: number): unknown;
export declare function truncatePayload(data: unknown[], maxBytes?: number): {
    data: unknown[];
    truncated: boolean;
    truncation_message?: string;
};