import type { ProviderType } from '../../shared/types/provider.js';
import type { ProviderUsageSnapshot } from '../models/response.js';
import { type StepType } from './usageEvent.js';
export interface UsageEventLoggerConfig {
    readonly logsDir: string;
    readonly sessionId: string;
    readonly runId: string;
    readonly enabled: boolean;
}
export interface UsageEventLogContext {
    readonly provider: ProviderType;
    readonly providerModel: string;
    readonly step: string;
    readonly stepType: StepType;
}
export interface UsageEventLogParams {
    readonly success: boolean;
    readonly usage: ProviderUsageSnapshot;
    readonly timestamp?: Date;
}
export interface UsageEventLogger {
    readonly filepath: string;
    logUsageFor(context: UsageEventLogContext, params: UsageEventLogParams): void;
}
export declare function createUsageEventLogger(config: UsageEventLoggerConfig): UsageEventLogger;
export declare function isUsageEventsEnabled(config?: {
    logging?: {
        usageEvents?: boolean;
    };
}): boolean;
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