export type RestartKind = 'manual' | 'update' | 'rollback';
export interface RestartIntentPayload {
    kind: RestartKind;
    /** Present for an update or rollback: the version delta to report. */
    oldVersion?: string;
    newVersion?: string;
    /** ISO 8601 timestamp the breadcrumb was written. */
    at: string;
}
export interface RestartIntent extends RestartIntentPayload {
    attemptId?: string;
    attemptState?: 'prepared' | 'committed' | 'aborted';
    deferredIntent?: RestartIntentPayload;
}
export type RestartIntentReportClaim = {
    state: 'claimed';
    intent: RestartIntent;
} | {
    state: 'prepared';
} | {
    state: 'absent';
};
/** Breadcrumbs older than this are stale (an aborted/failed restart left it)
 *  and never produce a report. */
export declare const RESTART_INTENT_FRESH_MS: number;
export declare const RESTART_LEASE_CLAIM_MS = 60000;
export declare const RESTART_LEASE_MAX_MS: number;
export declare function restartIntentPathIn(dir: string): string;
export declare function clearRestartIntentTo(dir: string): void;
export declare function writeRestartIntentTo(dir: string, intent: RestartIntent): void;
export declare function restartLeasePathIn(dir: string): string;
/** Call while holding globalInstallUpdateLockTarget(). */
export declare function hasActiveRestartLeaseTo(dir: string, nowMs: number): boolean;
/** Claim the restart handoff while holding globalInstallUpdateLockTarget(). */
export declare function claimRestartLeaseTo(dir: string, nowMs: number): string | null;
/** Bind a provisional claim while holding globalInstallUpdateLockTarget(). */
export declare function bindRestartLeaseTo(dir: string, id: string, pid: number, nowMs: number): boolean;
export declare function clearRestartLeaseTo(dir: string, id: string): void;
/** Read + delete the breadcrumb. Always deletes (fresh, stale, or corrupt) so
 *  it fires at most once and never lingers into a later restart. Returns the
 *  intent only when it is fresh. */
export declare function consumeRestartIntentTo(dir: string, nowMs: number): RestartIntent | null;
export declare function claimRestartIntentForReportTo(dir: string, nowMs: number): RestartIntentReportClaim;
export declare function hasPreparedRestartIntentTo(dir: string, nowMs: number): boolean;
/** Write a `manual` breadcrumb only when no *fresh* breadcrumb already exists —
 *  so a maintenance-written `update` breadcrumb is not clobbered
 *  by the `botmux restart` it spawns. */
export declare function writeManualIntentIfAbsentTo(dir: string, nowMs: number, atIso: string): void;
export declare function writeRestartAttemptIntentTo(dir: string, preferred: RestartIntent, nowMs: number, attemptId: string): RestartIntent;
export declare function commitRestartIntentAttemptTo(dir: string, attemptId: string): boolean;
export declare function removeRestartIntentAttemptTo(dir: string, attemptId: string): boolean;
export declare function writeRestartIntent(intent: RestartIntent): void;
export declare function clearRestartIntent(): void;
export declare function consumeRestartIntent(nowMs?: number): RestartIntent | null;
export declare function hasActiveRestartLease(nowMs?: number): boolean;
export declare function claimRestartLease(nowMs?: number): string | null;
export declare function clearRestartLease(id: string): void;
export declare function claimRestartIntentForReport(nowMs?: number): RestartIntentReportClaim;
export declare function hasPreparedRestartIntent(nowMs?: number): boolean;
export declare function writeManualIntentIfAbsent(nowMs?: number): void;
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