/** (target × feature × position) capability matrix.
 *  Per-slice codegen declares which features compile in which contexts on which targets.
 *  Populated incrementally as language evolution slices ship. */
import type { KernTarget } from './config.js';
export type FeaturePosition = 'top-level' | 'fn-body' | 'render' | 'template' | 'expression';
export type Support = 'native' | 'lowered' | 'unsupported';
export interface CapabilityEntry {
    feature: string;
    position: FeaturePosition;
    support: Support;
    note?: string;
}
export type CapabilityMatrix = Record<KernTarget, CapabilityEntry[]>;
export declare const CAPABILITY_MATRIX: CapabilityMatrix;
export declare function capabilitySupport(target: KernTarget, feature: string, position: FeaturePosition): Support;