export interface ProjectMetrics {
    projectName: string;
    requests: number;
    reads: number;
    writes: number;
    errors: number;
    totalLatencyMs: number;
    lastRequestAt: number;
}
export declare const projectMetrics: {
    /** Record a request for a project */
    recordRequest(projectName: string, type: "read" | "write", latencyMs: number, isError?: boolean): void;
    /** Get metrics for a project */
    getMetrics(projectName: string): ProjectMetrics | undefined;
    /** Get metrics for all projects */
    getAllMetrics(): ProjectMetrics[];
    /** Get average latency for a project */
    getAvgLatency(projectName: string): number;
    /** Get requests per second for a project (over last window) */
    getRequestsPerSecond(projectName: string, windowMs?: number): number;
    /** Reset metrics for a project */
    reset(projectName: string): void;
    /** Reset all metrics */
    resetAll(): void;
    /** Get summary (total across all projects) */
    getSummary(): {
        totalRequests: number;
        totalErrors: number;
        projectCount: number;
        avgLatency: number;
    };
    readonly size: number;
};