export interface AccountRepository {
    /** Raw filenames in the accounts dir, or [] if it can't be read. */
    list(accountsDirPath: string): string[];
    /** Parsed snapshot for `email`, or null when the file does not exist.
     *  Throws on parse errors and non-ENOENT fs errors. */
    read(email: string, accountsDirPath: string): Record<string, unknown> | null;
    /** Atomically write the snapshot payload for `email`. */
    write(email: string, accountsDirPath: string, payload: Record<string, unknown>): void;
    /** Delete `email`'s snapshot. Throws "No saved account for <email>" on ENOENT. */
    remove(email: string, accountsDirPath: string): void;
    /** Read a snapshot for the load() path: rejects symlinks and a missing file
     *  with explicit errors (security-critical). */
    loadRaw(email: string, accountsDirPath: string): Record<string, unknown>;
}
/** Production default: real filesystem under the accounts dir. */
export declare const fsAccountRepo: AccountRepository;