import { IChart } from '../../interfaces';
import { IFieldFeatures, IAutoVizChartType } from './types';
/** local id generator; nanoid (ESM-only) is deliberately avoided to keep this module jest-friendly */
export declare const autoVizId: () => string;
/**
 * Channel assignment conventions (VizQL-ish):
 * - multiple fields on rows/columns nest outer→inner, the LAST one is the innermost axis;
 * - extra dimensions overflow to facet headers (small multiples) rather than
 *   being crammed into a perception-weak channel;
 * - channels respect GLOBAL_CONFIG.CHANNEL_LIMIT (color/size/shape/... hold one field)
 *   and viewEncodingKeys(geom).
 */
export declare const builders: Record<IAutoVizChartType, (f: IFieldFeatures, base: IChart) => IChart>;