/**
 * Latency Tracker
 *
 * Per-tool sliding-window latency percentile tracker.
 * Uses a zero-dependency sorted-insert algorithm with bounded memory.
 *
 * Design:
 *   - One sorted number[] per tool name for O(1) percentile lookup
 *   - One parallel insertion-order number[] per tool for FIFO eviction
 *   - Binary-search insert: O(log n) per record
 *   - Configurable max samples per tool (default: 1000)
 *   - Nearest-rank percentile method (industry standard)
 */
export interface LatencyPercentiles {
    toolName: string;
    count: number;
    p50Ms: number;
    p95Ms: number;
    p99Ms: number;
    minMs: number;
    maxMs: number;
}
export declare class LatencyTracker {
    private readonly data;
    private readonly maxSamplesPerTool;
    constructor(maxSamplesPerTool?: number);
    /**
     * Record a latency sample for a tool.
     */
    record(toolName: string, durationMs: number): void;
    /**
     * Compute the p-th percentile for a tool using nearest-rank method.
     * @param toolName - Tool to query
     * @param p - Percentile as a fraction (0.50, 0.95, 0.99)
     * @returns The percentile value, or 0 if no data
     */
    getPercentile(toolName: string, p: number): number;
    /**
     * Get latency summary for all tracked tools, sorted by p99 descending.
     */
    getLatencySummary(): LatencyPercentiles[];
    /**
     * Reset all tracked data (primarily for tests).
     */
    reset(): void;
}
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