/**
 * Reports a one-time degradation of the HAR engine.
 * Every downgrade goes through this funnel so that it is greppable.
 *
 * With `PLAYWRIGHT_TOOLS_HAR_STRICT=1` every degradation throws instead, so that
 * a CI run cannot go green on a silently downgraded engine.
 */
export declare function degrade(code: string, message: string): void;
/** Test seam: forgets reported degradations so that warnings fire again. */
export declare function resetDegradations(): void;