interface MermaidApi {
    initialize: (config: Record<string, unknown>) => void;
    parse: (text: string, options?: {
        suppressErrors?: boolean;
    }) => Promise<unknown>;
    render: (id: string, text: string) => Promise<{
        svg: string;
    }>;
}
/** Load and configure Mermaid once per page. */
export declare function loadMermaid(): Promise<MermaidApi>;
/**
 * Render one diagram to a detached node ready to be adopted into a shadow root.
 *
 * Repeated definitions are served from cache, so the node is built fresh each
 * time from a shared SVG string — an element already adopted into one shadow
 * root cannot be handed to another.
 */
export declare function renderDiagram(mermaid: MermaidApi, definition: string, theme: string): Promise<HTMLElement>;
export {};