import type { HyperboxContactPatch4, HyperboxContactVertex4 } from './hyperbox-contact4.js';
export interface HyperboxContactTrackerOptions4 {
    /** Track the bounded solver subset (default) or every geometric vertex. */
    pointSource?: 'solver' | 'vertices';
}
export interface HyperboxTrackedContactPoint4 {
    readonly id: string;
    /** Number of consecutive tracker updates in which this identity was present. */
    readonly age: number;
    readonly isNew: boolean;
    readonly vertex: HyperboxContactVertex4;
}
export interface HyperboxContactTrackingResult4 {
    readonly points: readonly HyperboxTrackedContactPoint4[];
    /** Identities present in the previous update but absent from this one. */
    readonly retiredIds: readonly string[];
}
/**
 * Minimal temporal cache for box contact identities.
 *
 * Identity comes from local feature pairs rather than world coordinates, so
 * coherent motion can move a point without invalidating a future accumulated
 * impulse. The tracker deliberately does not guess proximity matches across a
 * topological feature change; such points retire and re-enter as new.
 */
export declare class HyperboxContactTracker4 {
    readonly pointSource: 'solver' | 'vertices';
    private ages;
    constructor(options?: HyperboxContactTrackerOptions4);
    update(patch: HyperboxContactPatch4 | null): HyperboxContactTrackingResult4;
    reset(): void;
}
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