import type { ChartCapability } from "../../ai/chartCapabilityTypes";
/**
 * Heatmap is a matrix: categorical × categorical (or temporal × categorical),
 * with a numeric encoded as color. Without two genuine discrete dimensions
 * for the axes, a heatmap of raw rows is sparse and unreadable. Tuned in
 * Phase 2.1 after the scorecard surfaced Heatmap winning unsuitable
 * compare-categories rankings.
 */
export declare const HeatmapCapability: ChartCapability;
