/**
 * Environment variable override detector for config keys
 */
/**
 * Mapping of environment variables to config keys
 */
export declare const ENV_OVERRIDE_MAP: Record<string, string>;
/**
 * Information about an environment variable override
 */
export interface EnvOverrideInfo {
    /** The environment variable name */
    envVar: string;
    /** The current value of the environment variable, or null if not set */
    value: string | null;
}
/**
 * Get the environment variable override value for a config key.
 * Returns the value if the environment variable is set, null otherwise.
 */
export declare function getEnvOverride(configKey: string): string | null;
/**
 * Get information about the environment variable that can override a config key.
 * Returns null if the key doesn't have an environment variable override.
 */
export declare function getEnvOverrideInfo(configKey: string): EnvOverrideInfo | null;
/**
 * Check if a config key has an environment variable override set.
 */
export declare function hasEnvOverride(configKey: string): boolean;
/**
 * Get the environment variable name for a config key.
 * Returns null if the key doesn't have an environment variable mapping.
 */
export declare function getEnvVarName(configKey: string): string | null;
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