/**
 * [WHO]: aggregateData
 * [FROM]: Depends on ./types
 * [TO]: Consumed by ./index
 * [HERE]: extensions/builtin/insights/stats.ts - cross-session statistics aggregation
 *
 * Statistics aggregation for the /insights command.
 *
 * 1:1 port of Claude Code src/commands/insights.ts aggregateData().
 * Removed: multi-clauding detection (CC-specific).
 */
import type { SessionMeta, SessionFacets, AggregatedData } from "./types.js";
export declare function aggregateData(sessions: SessionMeta[], facets: Map<string, SessionFacets>): AggregatedData;