export type AgentUsage = {
    provider: string;
    model: string;
    inputTokens?: number;
    outputTokens?: number;
    totalTokens?: number;
    predictSec?: number;
    inputChars?: number;
};
export type UsageRecord = {
    agent: string;
    provider: string;
    model: string;
    beatIndex?: number;
    inputTokens?: number;
    outputTokens?: number;
    totalTokens?: number;
    predictSec?: number;
    inputChars?: number;
    cached: boolean;
    retryAttempt?: number;
    timestamp: string;
};
export type UsageCollectorAPI = {
    add(record: Omit<UsageRecord, "timestamp"> & {
        timestamp?: string;
    }): void;
    snapshot(): UsageRecord[];
    merge(other: UsageCollectorAPI): void;
    clear(): void;
    readonly size: number;
};
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