export declare const OWNER_BIND_HANDOFF_TIMEOUT_MS = 5000;
export interface OwnerBinderDeps {
    now?(): number;
    sleep?(ms: number): Promise<void>;
    alive?(pid: number): boolean;
    processMarker?(pid: number): string | undefined;
    /** Test seam for synchronizing contenders after stale-owner validation. */
    beforeReclaim?(): Promise<void>;
}
export interface OwnerBinderLease {
    /** True only when a prior binder for this exact role and identity was observed. */
    inherited: boolean;
    release(): void;
}
export declare class OwnerBinderConflictError extends Error {
}
export declare class OwnerBinderHandoffTimeoutError extends Error {
}
/**
 * Serialize the one supervisor-owned binder for a role. A live matching holder
 * is an overlapping predecessor and gets a bounded handoff window. A holder
 * for any other role/identity, or unverifiable metadata, remains fail-closed.
 */
export declare function acquireOwnerBinderLease(stateDir: string, role: string, identity: string, deps?: OwnerBinderDeps, timeoutMs?: number): Promise<OwnerBinderLease>;