export interface SiblingStoreReport {
    path: string;
    rows: number;
}
/**
 * Count rows in the sibling AgentDB store, read-only. Returns null when there
 * is no sibling, it does not exist, or it cannot be read — an unreadable store
 * is not evidence of an empty one, so we stay silent rather than claim zero.
 */
export declare function countSiblingStoreRows(dbPath: string): Promise<SiblingStoreReport | null>;
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