import Database from 'better-sqlite3';

/** Build WHERE clause fragment for namespace filtering. */
declare function namespaceFilter(namespace: string | undefined, defaultNs: string): {
    clause: string;
    params: string[];
};
/** List all namespaces with memory counts. */
declare function listNamespaces(db: Database.Database): Array<{
    namespace: string;
    count: number;
}>;

export { listNamespaces, namespaceFilter };