/**
 * @license
 * Copyright 2023 Nuraly, Laabidi Aymen
 * SPDX-License-Identifier: MIT
 */
export type Canonicalize = 'json' | 'none' | ((src: string) => string);
export type DiffRow = {
    kind: 'equal';
    oldLine: number;
    newLine: number;
    text: string;
} | {
    kind: 'del';
    oldLine: number;
    text: string;
} | {
    kind: 'add';
    newLine: number;
    text: string;
};
/** Key-sort a JSON string so reordered-but-equivalent objects diff as identical. */
export declare function canonicalizeJson(src: string): string;
export declare function applyCanonicalize(src: string, mode?: Canonicalize): string;
/**
 * Line-level diff via longest-common-subsequence. Adequate for chat artifacts
 * (config JSON, small documents); not tuned for multi-megabyte inputs.
 */
export declare function diffLines(before: string, after: string): DiffRow[];
/** True when, after canonicalization, the two sides actually differ. */
export declare function hasRealDiff(before: string, after: string, mode?: Canonicalize): boolean;
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