/**
 * Network utility functions.
 */
/**
 * Check if a hostname is localhost.
 *
 * Uses the centralized LOCALHOST_HOSTS constant to ensure consistent
 * localhost detection across the codebase.
 *
 * @param hostname - The hostname to check (from URL.hostname)
 * @returns true if the hostname is localhost
 */
export declare function isLocalhost(hostname: string): boolean;
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