/**
 * ASCII Diagram Detection Heuristics
 *
 * Determines whether a string looks like an intentional ASCII diagram
 * (as opposed to just text with special characters).
 */
/**
 * Checks if text appears to be an ASCII diagram based on:
 * 1. Presence of box-drawing characters
 * 2. Structural patterns (corners forming boxes)
 *
 * @param text - The text to analyze
 * @returns true if the text looks like an ASCII diagram
 */
export declare function looksLikeAsciiDiagram(text: string): boolean;
/**
 * Simple + - | based ASCII art detection (for simpler diagrams)
 */
export declare function looksLikeSimpleAscii(text: string): boolean;
/**
 * Combined detection for both Unicode and simple ASCII diagrams
 */
export declare function isAsciiDiagram(text: string): boolean;