/**
 * Simple hash utilities for content-based identification
 */
/**
 * Generate a simple hash code from a string.
 * Uses djb2 algorithm - fast and produces good distribution.
 * @param str - String to hash
 * @returns Hash code as hex string
 */
export declare function hashCode(str: string): string;
/**
 * Generate a content hash combining type and content.
 * @param type - Plugin type (e.g., 'mermaid', 'vega')
 * @param content - Source content
 * @returns Combined hash string
 */
export declare function generateContentHash(type: string, content: string): string;