import { type KnownProcessType } from "./pid";
interface DaemonManagerConfig {
    dbPath: string;
    projectPath: string;
    daemonScript: string;
}
export interface DaemonStatus {
    state: "running" | "missing" | "dead";
    running: boolean;
    pid: number | null;
    stalePid: number | null;
    stalePidRemoved: boolean;
}
export interface DaemonSignalResult {
    ok: boolean;
    state: "delivered" | "no-daemon" | "daemon-dead" | "unsupported-signal" | "delivery-failed";
    via: "ipc" | "os-signal" | "none";
    pid: number | null;
    message: string;
    error?: string;
}
export interface MaintenancePreflightProcessStatus {
    processType: KnownProcessType;
    state: "running" | "missing" | "dead";
    running: boolean;
    pidPath: string;
    pid: number | null;
    stalePid: number | null;
    stalePidRemoved: boolean;
}
export interface MaintenancePreflightStatus {
    blocked: boolean;
    activeProcesses: MaintenancePreflightProcessStatus[];
    checks: MaintenancePreflightProcessStatus[];
}
export declare function getMaintenancePreflightStatus(dbPath: string): MaintenancePreflightStatus;
/** Manages the lifecycle of a background daemon subprocess for queue processing. */
export declare class DaemonManager {
    private readonly pidPath;
    private readonly projectPath;
    private readonly daemonScript;
    private subprocess;
    constructor(config: DaemonManagerConfig);
    start(): boolean;
    signal(message: string): DaemonSignalResult;
    stop(): void;
    isRunning(): boolean;
    getStatus(): DaemonStatus;
}
export {};
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