import { type SanitizeFeatures } from './sanitizer.js';
import type { RichTextPreset } from './types.js';
/** ProseMirror JSON → sanitized HTML for the given preset (+ feature overrides). */
export declare function jsonToHtml(doc: object | null, preset?: RichTextPreset, features?: SanitizeFeatures): string;
/** HTML string → ProseMirror JSON (tolerant; unknown nodes are dropped by the schema). */
export declare function htmlToJson(html: string | null, preset?: RichTextPreset, features?: SanitizeFeatures): object;
/**
 * ProseMirror JSON → plain text. Walks the document directly (no engine), so
 * it stays cheap and dependency-light. Block nodes are separated by newlines.
 */
export declare function jsonToText(doc: object | null): string;
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