/**
 * Text normalization pipeline that deobfuscates text before scanning.
 * Zero dependencies, pure TypeScript.
 */
export type NormalizeResult = {
    normalized: string;
    transforms: string[];
};
/** Strip zero-width / invisible formatting characters. */
export declare function stripZeroWidth(input: string): string;
/** Detect and decode base64 segments inline. */
export declare function decodeBase64Segments(input: string): string;
/** Decode hex escape sequences (\x41 → A). */
export declare function decodeHexEscapes(input: string): string;
/** Decode unicode escape sequences (\u0041 → A). */
export declare function decodeUnicodeEscapes(input: string): string;
/** Decode HTML entities (named, decimal, and hex). */
export declare function decodeHtmlEntities(input: string): string;
/** Map Cyrillic lookalike characters to their Latin equivalents. */
export declare function normalizeHomoglyphs(input: string): string;
/** Convert fullwidth characters to standard ASCII. */
export declare function normalizeFullwidth(input: string): string;
/** Collapse excessive whitespace into single spaces/newlines. */
export declare function collapseWhitespace(input: string): string;
/**
 * Normalize leetspeak/number substitutions in text.
 * Only applies when surrounded by letter-like context to avoid
 * converting legitimate numbers.
 */
export declare function normalizeLeetspeak(input: string): string;
/**
 * Full normalization pipeline. Applies all transforms in order and
 * tracks which ones actually modified the text.
 */
export declare function normalizeText(input: string): NormalizeResult;