/**
 * Shared decode/normalize variant builder for content-inspecting guards.
 *
 * Several guards (InputSanitizer, ExternalDataGuard, MultiModalGuard) need
 * to re-scan content after undoing common obfuscation — URL-encoding, hex,
 * base64, ROT13, string-reversal, zero-width/bidi-control insertion, and
 * Cyrillic homoglyph substitution — since attackers can wrap a payload in
 * any of these (or layer them) to evade pattern matching against the raw
 * string alone. This module is the single place that logic lives, so a fix
 * to the decode chain applies to every guard that uses it instead of
 * drifting across separate copies.
 */
/**
 * Build de-obfuscated variants of `text` for re-scanning, chaining
 * transforms up to a small depth so layered encodings (e.g. homograph
 * substitution that is then percent-encoded, or hex-of-base64) resolve to
 * readable text — a single independent pass per transform misses these
 * combinations. Does not include the original `text` in the result.
 */
export declare function buildDecodeVariants(rawText: string): string[];