/**
 * Reading the Markdown strings a message carries: native post `md` nodes and
 * card text fields.
 *
 * Two constructs mean more than their characters. An `<at>` tag names one of
 * the message's mention records — by `mention_key`, or by a `user_id` / `id`
 * equal to a record's key or identity — and is rewritten to that record's
 * placeholder so the channel resolves it like every other mention; a tag no
 * record accounts for stays literal. A Markdown image whose target is a
 * message image key is that image: the key stands in its place and the image
 * becomes a resource. A web image stays literal.
 */
import type { Mention } from './mentions.js';
import type { BodyBuilder } from './body.js';
export declare function readInlineMarkdown(source: string, mentions: Mention[] | undefined, body: BodyBuilder): string;
/** The placeholder key of the record `token` names, by key or by identity. */
export declare function mentionKey(mentions: Mention[] | undefined, token: string): string | undefined;
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