import type { Usage } from "@strands-agents/sdk";
/**
 * Mirrors Strands’ `accumulateUsage` / `createEmptyUsage` (`models/streaming` in the SDK). They are not re-exported from the
 * `@strands-agents/sdk` package entry, and deep imports are blocked by `package.json` `exports`.
 */
export declare function createEmptyUsage(): Usage;
export declare function accumulateUsage(target: Usage, source: Usage): void;