/**
 * Performance MCP Tools — on-disk metrics/benchmark store.
 * Extracted from performance-tools.ts.
 */
export interface PerfMetrics {
    timestamp: string;
    cpu: {
        usage: number;
        cores: number;
    };
    memory: {
        used: number;
        total: number;
        heap: number;
    };
    latency: {
        avg: number;
        p50: number;
        p95: number;
        p99: number;
    } | null;
    throughput: {
        requests: number;
        operations: number;
    } | null;
    errors: {
        count: number;
        rate: number;
    };
}
export interface Benchmark {
    id: string;
    name: string;
    type: string;
    results: {
        duration: number;
        iterations: number;
        opsPerSecond: number;
        memory: number;
    };
    createdAt: string;
}
export interface PerfStore {
    metrics: PerfMetrics[];
    benchmarks: Record<string, Benchmark>;
    version: string;
}
export declare function getPerfDir(): string;
export declare function getPerfPath(): string;
export declare function ensurePerfDir(): void;
export declare function loadPerfStore(): PerfStore;
export declare function savePerfStore(store: PerfStore): void;
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