import { z } from "zod";
/** 遗言文件的读回 schema(宪法 [ref] §2:边界读一律 safeParse,不裸铸)。写侧五键同形。 */
declare const CrashLastSchema: z.ZodObject<{
    at: z.ZodString;
    version: z.ZodString;
    pid: z.ZodNumber;
    uptimeMs: z.ZodNumber;
    inflight: z.ZodOptional<z.ZodNumber>;
    err: z.ZodString;
}, z.core.$strip>;
export type CrashLastInfo = z.infer<typeof CrashLastSchema>;
export declare function crashLastPath(dataRoot: string): string;
/** 崩溃现场写遗言(同步;自身绝不抛——遗言写失败不能遮蔽原崩溃)。 */
export declare function writeCrashLast(dataRoot: string, info: {
    version: string;
    inflight: number | undefined;
    err: unknown;
}): void;
/** 受控退收尾:删遗言(幂等,缺席零抛)。 */
export declare function clearCrashLast(dataRoot: string): void;
/** boot 提示腿:在场读回、缺席/坏字节/坏形回 `undefined`(绝不抛——遗言坏了不能挡启动)。 */
export declare function readCrashLast(dataRoot: string): CrashLastInfo | undefined;
export {};
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