/**
 * Twig Monitor — History Storage
 * Append-only history per normalized URL hash.
 * Default storage: ~/.twig/history/<urlHash>.json
 */
import type { MonitorRun } from './types.js';
export declare function normalizeUrl(url: string): string;
export declare function hashUrl(normalizedUrl: string): string;
export declare function getHistoryDir(baseDir?: string): string;
export declare function historyPath(normalizedUrl: string, baseDir?: string): string;
export declare function loadHistory(normalizedUrl: string, baseDir?: string): MonitorRun[];
export declare function appendHistory(run: MonitorRun, baseDir?: string): void;
export declare function latestRun(normalizedUrl: string, baseDir?: string): MonitorRun | null;