export interface SearchResultEntry {
    id: string;
    source: string;
    timestamp: string;
    title: string;
    subtitle: string;
    snippet: string;
    url?: string;
    file?: string;
    extra?: Record<string, unknown>;
}
export interface SearchResultGroup {
    source: string;
    label: string;
    count: number;
    entries: SearchResultEntry[];
}
export interface SearchIndexStats {
    sources: Array<{
        name: string;
        count: number;
        generated: string;
    }>;
}
export declare function brainSearch(brainHome: string, query: string, sources?: string[], limit?: number): Promise<{
    query: string;
    groups: SearchResultGroup[];
    totalResults: number;
}>;
export declare function getSearchIndexStats(brainHome: string): Promise<SearchIndexStats>;
/** Clear cache (for testing). */
export declare function clearSearchCache(): void;