interface QueryResultLike {
    rows: Array<Record<string, unknown>>;
    rowCount?: number | null;
}
interface PgClientLike {
    query(text: string, params?: unknown[]): Promise<QueryResultLike>;
}
export interface PostgresThreadExecutionCoordinatorOptions {
    client: PgClientLike;
    tableName?: string;
    autoMigrate?: boolean;
    now?: () => number;
}
export interface PostgresThreadExecutionLease {
    renew(): Promise<void>;
    release(): Promise<void>;
}
export declare class PostgresThreadExecutionCoordinator {
    private readonly client;
    private readonly table;
    private readonly ready;
    private readonly now;
    constructor(options: PostgresThreadExecutionCoordinatorOptions);
    acquire(options: {
        tenantId: string;
        threadId: string;
        ownerId: string;
        ttlMs: number;
    }): Promise<PostgresThreadExecutionLease | null>;
    private migrate;
}
export {};