import { z } from "zod";
/** 读回 schema(宪法 [ref] §2:边界读一律 safeParse,不裸铸)。写侧同形。 */
declare const ExitLastSchema: z.ZodObject<{
    at: z.ZodString;
    version: z.ZodString;
    pid: z.ZodNumber;
    orphan: z.ZodBoolean;
    reason: z.ZodString;
    idleForMs: z.ZodNumber;
    attached: z.ZodNumber;
    inflight: z.ZodNumber;
    lingerMs: z.ZodNumber;
    orphanedForMs: z.ZodOptional<z.ZodNumber>;
}, z.core.$strip>;
export type ExitLastInfo = z.infer<typeof ExitLastSchema>;
export declare function exitLastPath(dataRoot: string): string;
/** 自退那一刻写留痕(同步;自身绝不抛 —— 留痕写失败不得阻塞停机)。 */
export declare function writeExitLast(dataRoot: string, info: Omit<ExitLastInfo, "at" | "pid">): void;
/** boot 读回:在场读回、缺席/坏字节/坏形回 `undefined`(绝不抛 —— 留痕坏了不能挡启动)。 */
export declare function readExitLast(dataRoot: string): ExitLastInfo | undefined;
/** 读回并报过之后即清(幂等,缺席零抛):在场 ⇔ **上一次**退出是自退。 */
export declare function clearExitLast(dataRoot: string): void;
export {};
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