/**
 * #2661 root-fix — worktree leases.
 *
 * Registers which worktrees of a repository are currently "alive" (have a
 * running daemon actively heartbeating), independent of whether that
 * worktree's daemon is the elected repository supervisor (see
 * repo-supervisor.ts). A lease expires after 15 minutes without a heartbeat
 * — a removed worktree, or a daemon that crashed without a graceful
 * shutdown, becomes ineligible within one expiry window instead of lingering
 * forever in the registry.
 *
 * The registry lives under the user's home directory (not the workspace) so
 * it is visible to every worktree's daemon, keyed by repositoryId:
 *
 *   ~/.claude-flow/leases/<repositoryId>.json
 *
 * This is deliberately a thin, single-purpose registry — repo-supervisor.ts
 * is the piece that actually elects one process to own the recurring AI
 * worker schedule; leases only answer "which worktrees are currently live"
 * for status reporting and future supervisor-dispatched work.
 */
export declare const LEASE_TTL_MS: number;
export interface LeaseRecord {
    worktreeRoot: string;
    pid: number;
    registeredAt: number;
    lastHeartbeat: number;
}
export declare class WorkspaceLeaseRegistry {
    private readonly dir;
    constructor(options?: {
        baseDir?: string;
    });
    private fileFor;
    private ensureDir;
    private withLock;
    private readFile;
    private writeFile;
    /** Register or renew this process's lease on a worktree. Best-effort. */
    heartbeat(repositoryId: string, worktreeRoot: string): Promise<void>;
    /** Release this worktree's lease on graceful shutdown. Best-effort. */
    release(repositoryId: string, worktreeRoot: string): Promise<void>;
    /**
     * Active leases for a repository — expired (>15 min stale) or dead-PID
     * entries are excluded, not just filtered at read time, so callers never
     * see a worktree that's actually gone.
     */
    listActive(repositoryId: string): LeaseRecord[];
    /** True when the given worktree currently holds a live (non-expired) lease. */
    isLeaseActive(repositoryId: string, worktreeRoot: string): boolean;
}
export declare function getWorkspaceLeaseRegistry(): WorkspaceLeaseRegistry;
/** Test hook: reset the singleton (e.g. after changing RUFLO_AI_BUDGET_DIR). */
export declare function resetWorkspaceLeaseRegistryForTests(): void;
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