export interface PresenceLock {
    pid?: number;
    slug?: string;
    ts?: number;
}
/** Path to the loop's live-presence lock for a workspace. */
export declare function presenceLockPath(cwd: string): string;
/** Read + parse the presence lock; null on absent / unreadable / bad JSON. */
export declare function readPresenceLock(cwd: string): PresenceLock | null;
export interface ForeignOwnerOpts {
    now?: number;
    selfPid?: number;
    freshMs?: number;
    isAlive?: (pid: number, selfPid: number) => boolean;
}
/**
 * Given a parsed ws-presence.lock, return the pid of a DIFFERENT, still-alive
 * loop that currently owns this workspace's live presence — or null when the
 * caller should proceed (no lock, our own pid, a dead pid, or a stale ts).
 * Freshness defaults to 90s (the loop refreshes ts every ~25s heartbeat, so this
 * tolerates a few missed beats while still ignoring a crashed loop's stale lock).
 */
export declare function foreignLoopOwner(lock: PresenceLock | null | undefined, opts?: ForeignOwnerOpts): number | null;