import type { MaterialSpec } from './types.js';
export declare const DEFAULT_MATERIAL_SPEC: MaterialSpec;
/**
 * Build-time material definition (architecture §3.2). Merges `spec` over the REQ-MAT-07
 * initial values, validates the caps, and returns a deeply frozen {@link MaterialSpec}.
 * Pure and side-effect free: bundles that never import it tree-shake it away.
 */
export declare function defineMaterial(spec?: Partial<MaterialSpec>): MaterialSpec;
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