/**
 * HTML → clean markdown via Readability (main-content extraction) +
 * Turndown (HTML → markdown).
 *
 * The library backing the `read` command.
 *
 * linkedom, @mozilla/readability, and turndown are heavy, so they are loaded
 * lazily inside `htmlToMarkdown` rather than at module top level. A static
 * import would pull them into CLI startup (every command is registered
 * eagerly). linkedom replaced jsdom here: jsdom's transitive dependency tree
 * (`html-encoding-sniffer`, `whatwg-url`) does a CommonJS `require()` of the
 * ESM-only `@exodus/bytes`, which crashes a plain `node` process via
 * ERR_REQUIRE_ESM. linkedom is a lighter, CJS-friendly DOM with no such chain.
 * See ADR 0002.
 */
export interface ReadabilityOptions {
    /** Base URL for resolving relative links. Default `http://local/`. */
    url?: string;
    /** CSS selector for content. Bypasses Readability when set. */
    selector?: string;
    /** Truncate output to N chars (0 = no limit). Default 100000. */
    maxChars?: number;
    /** Return cleaned HTML instead of markdown (debugging). */
    raw?: boolean;
}
export interface ReadabilityResult {
    /** Final output: markdown or cleaned HTML when `raw: true`. */
    output: string;
    /** Pre-truncation length so callers can report what was dropped. */
    rawLength: number;
    /** Article title from Readability (`null` when --selector is used). */
    title: string | null;
}
/**
 * Convert raw HTML to clean markdown.
 *
 * Throws if input is empty, the selector matches nothing, or Readability
 * fails to find a main article (caller should retry with `selector`).
 */
export declare function htmlToMarkdown(html: string, opts?: ReadabilityOptions): Promise<ReadabilityResult>;
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