/**
 * Cross-platform utility functions that work in both Node.js and browser environments
 */
/**
 * CRITICAL: Safe JSON stringify that NEVER throws and handles circular references
 * This function is designed to prevent application crashes from non-serializable objects
 *
 * Features:
 * - Handles circular references gracefully
 * - Never throws errors (returns safe fallback strings instead)
 * - Uses custom implementation for consistent behavior
 * - Maintains compatibility with existing tests
 */
export declare const stringifyJSON: (obj: any, visited?: Set<any>) => string;
/**
 * Simple string formatting that works in both Node.js and browser environments
 * Handles format specifiers like %s, %d, %j, %i, %f similar to Node.js util.format
 */
export declare const safeFormat: (message: string, ...args: any[]) => string;
/**
 * Safe object inspection that works in both Node.js and browser environments
 * Uses stringifyJSON for consistent, safe serialization
 */
export declare const safeInspect: (obj: any) => string;
/**
 * CRITICAL: Safe JSON.stringify for entire log entries
 * This is specifically for structured logging where the entire log object is stringified
 * NEVER throws - will return a safe error message instead of crashing the application
 *
 * @param obj - The log entry object to stringify
 * @returns A JSON string that is guaranteed to be serializable
 */
export declare const safeJSONStringify: (obj: any) => string;