import { z } from "zod";
export declare const PidRecordSchema: z.ZodObject<{
    pid: z.ZodNumber;
    startedAt: z.ZodString;
    hostname: z.ZodString;
    workspaceRoot: z.ZodString;
}, "strict", z.ZodTypeAny, {
    workspaceRoot: string;
    startedAt: string;
    pid: number;
    hostname: string;
}, {
    workspaceRoot: string;
    startedAt: string;
    pid: number;
    hostname: string;
}>;
export type PidRecord = z.infer<typeof PidRecordSchema>;
export interface PidFileLock {
    readonly record: PidRecord;
    readonly path: string;
    release(): Promise<void>;
}
export type PidLiveness = "alive" | "dead" | "foreign-host" | "indeterminate";
export declare function classifyPidLiveness(record: PidRecord, hostname?: string): PidLiveness;
export declare class PidFileBusyError extends Error {
    readonly record: PidRecord;
    readonly filePath: string;
    constructor(record: PidRecord, filePath: string);
}
export declare function acquirePidFile(workspaceRoot: string): Promise<PidFileLock>;
export declare function readPidRecord(workspaceRoot: string): Promise<PidRecord | null>;
export declare function readPidFile(workspaceRoot: string): Promise<number | null>;
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