/**
 * Persistence layer for implementation comparison results.
 *
 * Reads and writes comparison data to `.agents-reverse-engineer/implementations/<id>/`.
 *
 * @module
 */
import type { ImplementationComparison } from './types.js';
/**
 * Save an implementation comparison to disk.
 *
 * Creates the directory structure and writes:
 * - `comparison.json` - Full comparison data
 * - `implementation-with-docs.log` - AI execution log (with docs)
 * - `implementation-without-docs.log` - AI execution log (without docs)
 *
 * @param projectRoot - The project root directory
 * @param comparison - The comparison data to save
 * @param withDocsLog - AI execution log from "with docs" run
 * @param withoutDocsLog - AI execution log from "without docs" run
 * @returns Path to the saved comparison directory
 */
export declare function saveComparison(projectRoot: string, comparison: ImplementationComparison, withDocsLog: string, withoutDocsLog: string): Promise<string>;
/**
 * Load an implementation comparison from disk.
 *
 * @param projectRoot - The project root directory
 * @param id - The comparison ID (ISO timestamp or partial match)
 * @returns The comparison data, or null if not found
 */
export declare function loadComparison(projectRoot: string, id: string): Promise<ImplementationComparison | null>;
/**
 * List all saved implementation comparisons.
 *
 * @param projectRoot - The project root directory
 * @returns Array of comparisons sorted by date (newest first)
 */
export declare function listComparisons(projectRoot: string): Promise<ImplementationComparison[]>;
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