/**
 * Whether `host` is an IP literal in a private, link-local, or otherwise
 * reserved range that an outbound framework request must not target — an SSRF
 * guard for caller-supplied URLs (covers RFC1918, CGNAT, link-local incl. cloud
 * metadata at `169.254.169.254`, IPv6 ULA/link-local, and the unspecified
 * address). Loopback is intentionally allowed (see {@link reservedRanges}).
 *
 * Plain hostnames return `false`: no DNS resolution is performed here, so a
 * hostname that resolves to a private address is not caught at this layer.
 */
export declare function isReservedIpAddress(host: string): boolean;