import type { ExitCause } from "../execution/events.js";
export declare const EXIT_CLEAN = 0;
export declare const EXIT_REFUSAL = 2;
export declare const EXIT_FAILURE = 1;
/** Crash tier: an uncaught exception, rejection, or main-loop failure inside
 * hcn itself. Distinct from every ordinary class so a crash can never alias
 * a failed turn (1) or a usage refusal (2). The child harness's own crash
 * cause stays EXIT_FAILURE - it is a harness outcome, not an hcn bug. */
export declare const EXIT_CRASH = 4;
export declare const exitCodeForCause: (cause: ExitCause) => number;
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