import type Anthropic from '@anthropic-ai/sdk';
/**
 * Records token usage from an API response and accumulates estimated cost.
 */
export declare function recordUsage(model: string, usage: Anthropic.Usage): void;
/**
 * One-line usage summary printed at the end of a scan.
 */
export declare function getCostSummary(): string;
/** Test hook. */
export declare function resetUsage(): void;
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