/** Resolve a fence info string to a shiki language id, or `text` when unknown. */
export declare const resolveLanguage: (lang: string) => string;
export interface HighlightThemes {
    light: string;
    dark: string;
}
/**
 * Highlight `code`. Returns the HTML string synchronously when everything needed is
 * already loaded; otherwise a promise that resolves to the HTML (or `null` when the
 * language/theme could not be loaded — callers keep the plain rendering then).
 */
export declare const highlight: (code: string, language: string, themes: HighlightThemes) => string | Promise<string | null>;
export declare const DEFAULT_THEMES: HighlightThemes;
/** Parse the `highlight` attribute: `""` → defaults, `"a"` → both, `"a b"` → light/dark. */
export declare const parseThemes: (value: string) => HighlightThemes;