/**
 * Shared truncation utilities for tool outputs.
 *
 * Truncation is based on two independent limits - whichever is hit first wins:
 * - Line limit (default: 2000 lines)
 * - Byte limit (default: 50KB)
 *
 * Never returns partial lines (except bash tail truncation edge case).
 */
export declare const DEFAULT_MAX_LINES = 2000;
export declare const DEFAULT_MAX_BYTES: number;
export type { TruncationOptions, TruncationResult } from "./types.js";
import type { TruncationOptions, TruncationResult } from "./types.js";
/**
 * Format bytes as human-readable size.
 */
export declare function formatSize(bytes: number): string;
/**
 * Truncate content from the head (keep first N lines/bytes).
 * Suitable for file reads where you want to see the beginning.
 *
 * Never returns partial lines. If first line exceeds byte limit,
 * returns empty content with firstLineExceedsLimit=true.
 */
export declare function truncateHead(content: string, options?: TruncationOptions): TruncationResult;
/**
 * Truncate content from the tail (keep last N lines/bytes).
 * Suitable for bash output where you want to see the end (errors, final results).
 *
 * May return partial first line if the last line of original content exceeds byte limit.
 */
export declare function truncateTail(content: string, options?: TruncationOptions): TruncationResult;
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