/**
 * S3 ISR cache invalidation for OpenNext deployments.
 *
 * Next.js standalone mode does not expose `x-next-cache-tags` via response
 * headers (Vercel-only). OpenNext's DynamoDB tag cache never receives
 * tag-to-path mappings for ISR page routes. When Payload calls
 * `revalidatePath('/about')`, there's nothing to invalidate in DynamoDB,
 * so stale S3 cache persists indefinitely.
 *
 * This utility deletes the stale S3 cache entry directly, forcing Lambda
 * to re-render from the database on next request.
 */
interface Logger {
    info: (message: string) => void;
    warn?: (message: string) => void;
}
/**
 * Delete the stale S3 ISR cache entry for a page path.
 *
 * - No-op when `CACHE_BUCKET_NAME` or `AWS_LAMBDA_FUNCTION_NAME` is not set
 * - Best-effort: catches all errors, logs via optional logger, never rejects
 *
 * @param pagePath - The page path as passed to `revalidatePath()`, e.g. `/about`
 * @param logger - Optional logger (`payload.logger` satisfies this)
 */
export declare function invalidateS3Cache(pagePath: string, logger?: Logger): Promise<void>;
export {};