/**
 * Redirect chain tracker — records the full redirect chain for crawled URLs.
 *
 * Why: redirect chains (A→B→C) slow down pages; circular redirects crash crawlers;
 * redirect loops indicate config errors. ZeTa records chains for SEO/perf audit.
 *
 * Integration: hook into Playwright's page.on('response') to see each redirect hop.
 */
export interface RedirectHop {
    from: string;
    to: string;
    statusCode: number;
    durationMs: number;
}
export interface RedirectChain {
    originalUrl: string;
    finalUrl: string;
    hops: RedirectHop[];
    isCircular: boolean;
    hopCount: number;
    totalDurationMs: number;
}
import type { Page } from 'playwright';
export declare function trackRedirects(page: Page, url: string): Promise<RedirectChain>;
export declare class RedirectRegistry {
    private chains;
    register(chain: RedirectChain): void;
    get(url: string): RedirectChain | undefined;
    getAll(): RedirectChain[];
    getProblematic(): RedirectChain[];
    stats(): {
        total: number;
        withRedirects: number;
        circular: number;
        deepChains: number;
    };
}