import type Anthropic from '@anthropic-ai/sdk';
import type { FactoryState } from './types.js';
export interface UsageDelta {
    readonly inputTokens: number;
    readonly outputTokens: number;
    readonly cacheReadTokens: number;
    readonly cacheWriteTokens: number;
    readonly estimatedUsd: number;
}
export declare function usageFromAnthropic(message: Anthropic.Message, model: string): UsageDelta;
export declare function addUsage(state: FactoryState, delta: UsageDelta): FactoryState;
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