export type EnvVarParser = "boolean" | "csv" | "integer" | "path" | "string" | "url";
export type EnvVarSpec = {
    default: string;
    description: string;
    name: string;
    parser: EnvVarParser;
    secret?: true;
};
export declare const envVarRegistry: readonly EnvVarSpec[];
export declare function unrecognizedEnvNames(env?: NodeJS.ProcessEnv): string[];
export type ActiveEnvVar = {
    description: string;
    name: string;
    value: string;
};
export declare function activeNonDefaultEnv(env?: NodeJS.ProcessEnv): ActiveEnvVar[];