import type { SvelteMarkdownOptions } from '../types.js';
import { type MarkedExtension } from 'marked';
/**
 * Gets the custom token names declared by Marked extensions.
 *
 * @param extensions Marked extensions passed to the component.
 * @returns Token names that can be rendered by custom renderers or snippets.
 */
export declare const getExtensionTokenNames: (extensions: MarkedExtension[]) => string[];
/**
 * Gets Marked's resolved defaults for a set of extensions.
 *
 * @param extensions Marked extensions to resolve in a scoped Marked instance.
 * @returns Marked defaults contributed by the extensions, or an empty object.
 */
export declare const getExtensionDefaults: (extensions: MarkedExtension[]) => import("marked").MarkedOptions<string, string>;
/**
 * Checks whether any extension requires async token walking.
 *
 * @param extensions Marked extensions passed to the component.
 * @returns True when at least one extension has `async: true`.
 */
export declare const hasAsyncExtension: (extensions: MarkedExtension[]) => boolean;
/**
 * Builds an internal cache signature from extension object identity.
 *
 * The token cache serializes parser options, so opaque extension objects need
 * stable WeakMap IDs to invalidate cached tokens when callers replace an
 * equivalent-looking extension with different closure state.
 *
 * @param extensions Marked extensions used to configure parsing.
 * @returns Serializable identity records included in parser cache inputs.
 */
export declare const getExtensionCacheSignature: (extensions: MarkedExtension[]) => {
    extension: number;
    async: boolean;
    extensions: {
        token: number;
        name: string;
        level: {} | null;
        childTokens: {} | null;
        start: number | null;
        tokenizer: number | null;
        renderer: number | null;
    }[] | null;
    hooks: number | null;
    renderer: number | null;
    tokenizer: number | null;
    walkTokens: number | null;
}[];
/**
 * Builds the complete parser options object used by sync and async parsing.
 *
 * @param options Caller-provided parser options.
 * @param extensions Marked extensions passed to the component.
 * @returns Parser options merged with defaults, extension defaults, and cache signature.
 */
export declare const buildParserOptions: (options: Partial<SvelteMarkdownOptions>, extensions: MarkedExtension[]) => SvelteMarkdownOptions;