/**
 * Safe environment detection utilities
 */
/**
 * Check if running in Node.js environment
 */
export declare function isNodeEnvironment(): boolean;
/**
 * Check if running in browser environment
 */
export declare function isBrowserEnvironment(): boolean;
/**
 * Check if environment variables are available
 */
export declare function hasEnvironmentVariables(): boolean;
/**
 * Safe environment variable getter
 */
export declare function getEnvironmentVariable(key: string, defaultValue?: string): string | undefined;
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