/**
 * The result of local-part character analysis.
 */
interface CharacterResult {
  /** Ratio of digits to total characters in the local part (0–1). */
  digitRatio: number;
  /** True when the local part looks irregular / machine-generated / risky. */
  irregular: boolean;
  /** Length of the local part. */
  length: number;
  /** Human-readable reasons contributing to the `irregular` verdict. */
  reasons: string[];
}
/**
 * Analyzes the local part of an email for irregular characteristics that
 * correlate with low-quality, spam-trap, or machine-generated addresses.
 *
 * Heuristic and intentionally conservative — it flags *patterns* (excessive
 * length, digit-heavy locals, long unpronounceable consonant runs, long repeats)
 * rather than asserting invalidity.
 * @param email The email address to analyze.
 * @returns The character analysis result.
 * @example
 * ```ts
 * import { analyzeCharacters } from "@visulima/email-verifier/checks/character";
 *
 * analyzeCharacters("aaaaaaa@example.com").irregular; // long repeat ⇒ true
 * ```
 */
declare const analyzeCharacters: (email: string) => CharacterResult;
export { type CharacterResult, analyzeCharacters, analyzeCharacters as default };