export type HarEngineTier = 'legacy' | 'public-api';
export declare function getHarEngineTier(): HarEngineTier;
/**
 * Installs the historical patches for all four hooks at once. Every patch reads
 * the registry lazily, so an unused hook is a pass-through. Returns `false` on
 * the public-API tier; a failed attempt remains retryable.
 */
export declare function installLegacyHarEngine(): boolean;