/**
 * Facet generation for query results
 */
import type { LogEntry } from '../types.js';
/**
 * Generate facets (counts by category) for filtered log entries
 */
export declare function generateFacets(entries: LogEntry[]): {
    levels: Record<string, number>;
    sources: Record<string, number>;
    tags: Record<string, number>;
    errorTypes: Record<string, number>;
    hours: Record<string, number>;
};
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