import { Document } from '@gltf-transform/core';
export interface SimplifyResult {
    before: number;
    after: number;
}
/**
 * Attribute-preserving simplification to a triangle target via meshopt. `lockBorder` additionally
 * locks open-border vertices (architecture §6: never re-UV — the platform's identity-as-textures
 * depends on the original layout), so it stays TRUE for first-party bodies; importers with real open
 * borders (hair cards, garments) may pass false. Note meshopt ALWAYS preserves attribute-seam
 * vertices regardless of these knobs — a micro-chart baked atlas (Meshy) therefore floors at its
 * chart-border ring (~34% on the reference warrior) whatever the error budget; that case needs
 * weldedSimplify, not bigger `errorCap` (0.001 first-party; ~0.02 for imports).
 */
export declare function simplifyToTarget(document: Document, targetTris: number, errorCap?: number, lockBorder?: boolean): Promise<SimplifyResult>;