import type { EntityHandle } from './codec.js';
import type { EntityIndex } from './index-allocator.js';
export interface EntityReservation {
    /** Pre-fully-formed handles, ready to use. */
    readonly handles: readonly EntityHandle[];
    readonly workerIndex: number;
}
/** Reserve `count` entity handles for `workerIndex` to consume mid-wave. Serial-phase only. */
export declare function reserveEntityBlock(index: EntityIndex, workerIndex: number, count: number): EntityReservation;
/** After the wave, reclaim any handles the worker did not consume (returns them to the pool). */
export declare function returnReservedIds(index: EntityIndex, reservation: EntityReservation, consumedCount: number): void;
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