/**
 * Generates a 24-char app password satisfying the Nylas agent-account policy:
 * 18–40 standard non-space ASCII with upper/lower/digit/symbol.
 * Ambiguous glyphs (I/l/1/O/0) are excluded for readability.
 */
export declare function generateAppPassword(mailboxName?: string): string;
/** Mirrors UAS ValidateAppPassword. Returns an error message or undefined. */
export declare function validateAppPassword(value: string, mailboxName?: string): string | undefined;
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