/**
 * Persisted re-login state — what survives a backend restart.
 *
 * The owner is told once per harness per machine that it is signed out, then
 * re-reminded with backoff. Without persistence every restart (an
 * auto-update, a crash loop while every agent is stuck) would DM again. The
 * file also remembers which harnesses were seen signed in, so a later
 * `logged_out` is an expiry and not a machine that was never set up.
 *
 * File: `<crewlyHome>/harness-relogin-state.json` (mode 0600, no secrets).
 *
 * @module services/harness/relogin-state.store
 */
import { type HarnessId } from './harness.types.js';
/** What is remembered for one harness. */
export interface HarnessReloginRecord {
    /** When the harness was first confirmed signed out (epoch ms) */
    signedOutSince?: number;
    /** When the owner was last told (epoch ms) */
    lastNoticeAt?: number;
    /** Notices sent since it was signed out (drives the backoff) */
    noticeCount?: number;
    /** Last time the harness was seen signed in (epoch ms) */
    seenLoggedInAt?: number;
}
/** Storage for {@link HarnessReloginRecord}s. */
export interface ReloginStateStore {
    get(harnessId: HarnessId): HarnessReloginRecord;
    update(harnessId: HarnessId, patch: Partial<HarnessReloginRecord> | null): void;
}
/** In-memory store (tests, CLI). */
export declare class MemoryReloginStateStore implements ReloginStateStore {
    private readonly records;
    get(harnessId: HarnessId): HarnessReloginRecord;
    /**
     * Merge a patch (null / undefined fields are dropped; a null patch clears the record).
     *
     * @param harnessId - Harness
     * @param patch - Fields to set, or null to forget the harness
     */
    update(harnessId: HarnessId, patch: Partial<HarnessReloginRecord> | null): void;
    /** @returns Every record (persistence) */
    entries(): Array<[HarnessId, HarnessReloginRecord]>;
}
/** File-backed store; a missing or unreadable file starts empty. */
export declare class FileReloginStateStore extends MemoryReloginStateStore {
    private readonly file;
    /**
     * @param file - JSON file path
     */
    constructor(file: string);
    /** @inheritdoc */
    update(harnessId: HarnessId, patch: Partial<HarnessReloginRecord> | null): void;
}
/**
 * The backend's store under CREWLY_HOME.
 *
 * @returns A file store
 */
export declare function createDefaultReloginStateStore(): ReloginStateStore;
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