export type ImapValue = string | ImapValue[];
/**
 * Parses a parenthesized IMAP list (quoted strings, atoms, nested parens)
 * into nested arrays.
 *
 * Example: `(("" "/") ("Archive" "/"))` → [["", "/"], ["Archive", "/"]]
 */
export declare function parseImapList(text: string): ImapValue[];
/**
 * Quotes a string as an IMAP quoted string, escaping backslashes and quotes.
 */
export declare function quote(value: string): string;
/**
 * Returns the value as-is if it is a safe IMAP atom, otherwise quoted.
 */
export declare function quoteIfNeeded(value: string): string;
/** Formats a Date as an IMAP search date: dd-Mmm-yyyy */
export declare function formatImapDate(value: Date): string;
/** Formats a Date as an IMAP internal date: dd-Mmm-yyyy HH:mm:ss +ZZZZ */
export declare function formatInternalDate(value: Date): string;
/**
 * Parses an IMAP date-time string (RFC 9051 §9: dd-MMM-yyyy HH:mm:ss +ZZZZ,
 * e.g. "17-Jul-1996 02:44:25 -0700") into a Date deterministically.
 * Returns an invalid Date when the input cannot be parsed.
 */
export declare function parseInternalDate(value: string): Date;
/**
 * Encodes a string as modified UTF-7 (RFC 2152), the mailbox name encoding
 * used by IMAP4rev1. Printable ASCII (except "&") is passed through; other
 * characters are base64-encoded UTF-16BE between "&" and "-".
 */
export declare function encodeMutf7(input: string): string;
/** Decodes a modified UTF-7 (RFC 2152) string back into Unicode. */
export declare function decodeMutf7(input: string): string;
/**
 * Splits the content of a [...] response code section into top-level
 * tokens, keeping parenthesized groups (e.g. PERMANENTFLAGS (\Seen \Deleted))
 * together.
 */
export declare function splitResponseCodes(bracketContent: string): string[];