/**
 * Browser environment stubs.
 *
 * Returns safe defaults when running in a browser context
 * where `process` is not available.
 */
export declare function getEnv(_key: string): string | undefined;
export declare function getEnv(_key: string, defaultValue: string): string;
export declare function getCwd(): string;
export declare function isProduction(): boolean;
export declare function isDevelopment(): boolean;
export declare function getEnvFlag(_key: string): boolean;
export declare function isDebug(): boolean;
export declare function setEnv(_key: string, _value: string): void;
export declare function isEdgeRuntime(): boolean;
export declare function isServerless(): boolean;
export declare function supportsAnsi(): boolean;