export interface AnalyticsEvent {
    type: 'message' | 'llm_call' | 'tool_use' | 'error';
    timestamp: number;
    data: Record<string, any>;
}
export interface AnalyticsStats {
    totalMessages: number;
    totalLLMCalls: number;
    totalToolUses: number;
    totalErrors: number;
    avgResponseTimeMs: number;
    totalTokens: {
        input: number;
        output: number;
        total: number;
    };
    topSkills: {
        name: string;
        count: number;
    }[];
    topErrors: {
        message: string;
        count: number;
    }[];
    messagesPerDay: Record<string, number>;
    period: {
        from: number;
        to: number;
    };
}
export declare class AnalyticsEngine {
    private dataDir;
    private eventsFile;
    private events;
    constructor(dataDir?: string);
    private load;
    private save;
    track(type: AnalyticsEvent['type'], data: Record<string, any>): void;
    trackMessage(userId: string, responseTimeMs: number, tokensIn: number, tokensOut: number): void;
    trackLLMCall(provider: string, model: string, tokensIn: number, tokensOut: number, latencyMs: number): void;
    trackToolUse(toolName: string, success: boolean, latencyMs: number): void;
    trackError(error: string, context?: string): void;
    getStats(fromTs?: number, toTs?: number): AnalyticsStats;
    getRecentEvents(limit?: number): AnalyticsEvent[];
    clear(): void;
    /**
     * Format stats for CLI display.
     */
    static formatStats(stats: AnalyticsStats): string;
}
//# sourceMappingURL=analytics-engine.d.ts.map