export declare class ConfigError extends Error {
    readonly exitCode = 2;
    constructor(message: string);
}
export declare class RuntimeError extends Error {
    readonly exitCode = 3;
    constructor(message: string);
}
export declare class EvalFailureError extends Error {
    readonly exitCode = 1;
    constructor(message: string);
}
export declare function getExitCode(err: unknown): number;
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