/**
 * Convert markdown source to plain text. Used by both the SEO server component
 * (article-body echo in JSON-LD) and chat entity-card preview (clamped previews
 * inside chat cards).
 *
 * The two consumers differ only in pre/post processing — `mode: 'article'`
 * strips code blocks + images + headings + list bullets and preserves paragraph
 * breaks; `mode: 'preview'` collapses everything to a single line. Both share
 * the same inline-marker strip (link / bold / italic / inline-code).
 *
 * All regex patterns are linear (negated character classes, non-greedy with
 * bounded targets) — no nested quantifiers, no catastrophic backtracking on
 * pathological input.
 */
export interface MarkdownToPlainOptions {
    /**
     * - `'article'` (default): preserve paragraph structure (`\n\n` as separator),
     *   strip code blocks + images + headings + list bullets. Used for the
     *   article-body echo on SEO surfaces.
     * - `'preview'`: collapse all whitespace to single spaces; result is a single
     *   line. Used for chat-card previews / OG-card snippets where line breaks
     *   would wrap awkwardly.
     */
    mode?: 'article' | 'preview';
    /** Optional max-character cap. Truncates with no ellipsis (caller-decided). */
    maxChars?: number;
}
/** Strip inline markdown markers (bold, italic, inline-code, links). Shared
 *  by `extractSections`'s `stripFormattingMarkers` and `markdownToPlainText`. */
export declare function stripInlineMarkdown(s: string): string;
export declare function markdownToPlainText(markdown: string, options?: MarkdownToPlainOptions): string;
//# sourceMappingURL=markdown-to-plain.d.ts.map