declare const SERVER_I18N_TEST_BARRIER_REACHED_HEADER = "x-palamedes-i18n-test-barrier-reached";
/**
 * Adds a test-only response marker after a request has passed the rendezvous.
 * The verifier requires this marker, so an adapter that does not register its
 * barrier cannot produce a false-positive concurrency result.
 */
declare function markServerI18nTestBarrierReached(request: Request, headers: Headers): void;
/**
 * Wait for a matching request after its i18n scope has been activated and
 * before the framework begins rendering translations. This is deliberately
 * unreachable in normal servers: both the opt-in environment variable and a
 * per-request header are required.
 */
declare function waitForServerI18nTestBarrier(request: Request): Promise<void> | undefined;

export { SERVER_I18N_TEST_BARRIER_REACHED_HEADER, markServerI18nTestBarrierReached, waitForServerI18nTestBarrier };