/**
 * This module contains utility functions to get environment variables with default values and validation.
 */
export declare const getEnvString: (key: string, defaultValue?: string) => string;
export declare const getEnvNumber: (key: string, defaultValue: number) => number;
/**
 * Like {@link getEnvNumber} but preserves fractional values (parseFloat, not parseInt).
 * Use for ratio/fraction settings such as RECONCILE_MAX_DELETE_FRACTION.
 */
export declare const getEnvFloat: (key: string, defaultValue: number) => number;
export declare const getEnvBoolean: (key: string, defaultValue?: boolean) => boolean;
export declare const getOptionalEnv: (key: string) => string | undefined;
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