import { type ReactNode } from 'react';
/**
 * Runtime knobs threaded from `<RichMarkdownRenderer>` down to its
 * satellite embed clients (reddit / twitter / og link preview / markdown
 * image). Lives in its own micro-context — distinct from the
 * `ChatRuntimeContext` used by the lib's chat module — because the
 * markdown renderer is mounted from documentation pages (blog, legal,
 * data room, knowledge base) that do NOT have a chat runtime in scope,
 * and the satellites need just three knobs:
 *
 *   - WHERE to fetch the reddit / twitter / OG-scrape proxy
 *   - HOW to transform a markdown image URL (the hub injects its
 *     Supabase image transformer; embedders pass null / identity)
 *
 * Defaults match the hub's existing endpoints so passing
 * `<RichMarkdownRenderer>` no props at all still works end-to-end on
 * the hub. Embedders override per-prop as needed.
 */
export interface RichMarkdownRuntime {
    redditProxyUrl: string;
    twitterProxyUrl: string;
    ogScraperUrl: string;
    /** Hub-only Supabase image transformer. Returning null means "don't
     *  rewrite — use the src as-is". Defaults to identity (no rewrite). */
    transformImageSrc: (src: string, opts?: {
        width?: number;
        quality?: number;
        resize?: 'cover' | 'contain' | 'fill';
    }) => string | null;
}
/**
 * Provider that fills in defaults for any prop the caller didn't pass.
 * Memoizes the resolved runtime so satellites don't re-render when an
 * unrelated parent state ticks.
 */
export declare function RichMarkdownRuntimeProvider({ redditProxyUrl, twitterProxyUrl, ogScraperUrl, transformImageSrc, children, }: Partial<RichMarkdownRuntime> & {
    children: ReactNode;
}): import("react").JSX.Element;
/**
 * Read the ambient runtime. Returns the defaults when called outside any
 * `RichMarkdownRuntimeProvider` — so embedders that drop a satellite into
 * a non-renderer context (e.g. a release page calling
 * `<RedditEmbedClient>` directly) get the hub-matching defaults for free.
 */
export declare function useRichMarkdownRuntime(): RichMarkdownRuntime;
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