/** Mermaid needs a unique DOM id per render; a shared one makes two diagrams fight over one node. */
export declare const nextMermaidRenderId: () => string;
export declare const normalizeMermaidSource: (raw: unknown) => string;
export declare const salvageMermaidSource: (normalized: string) => string;
export declare const sanitizeMermaidSvg: (svg: unknown) => string;
/** A failed render leaves its scratch nodes in the document; Mermaid does not clean up after itself. */
export declare const purgeMermaidTempNodes: (renderId: string) => void;
/** Mermaid errors carry the whole diagram back in the message; only the first lines are useful. */
export declare const describeMermaidError: (error: unknown) => string;