export type PuremdResult = {
    ok: true;
    text: string;
} | {
    ok: false;
    reason: string;
};
/** Fetch a single URL's content as markdown via pure.md, capped at maxChars.
 *  Never throws — any transport or HTTP failure becomes { ok: false, reason }
 *  so the caller can keep the URL in its failures list. */
export declare function puremdFetch(url: string, maxChars: number): Promise<PuremdResult>;