/**
 * Performance Regression Detection — v4.9.0 Enhanced
 *
 * SQLite-backed metric tracking with configurable thresholds for
 * latency, cost, and token regressions.
 */
import type { SuiteResult } from './types';
export interface PerfMetrics {
    latency_ms: number;
    cost_usd?: number;
    tokens?: number;
    tool_calls?: number;
    custom?: Record<string, number>;
}
export interface ThresholdConfig {
    latency_percent?: number;
    cost_percent?: number;
    token_percent?: number;
    custom?: Record<string, number>;
}
export interface PerfRecord {
    suite: string;
    timestamp: string;
    metrics: PerfMetrics;
    tags?: string[];
}
export interface PerfComparison {
    suite: string;
    baseline: PerfRecord;
    current: PerfRecord;
    regressions: PerfAlert[];
    improvements: PerfAlert[];
    unchanged: string[];
}
export interface PerfAlert {
    metric: string;
    baseline: number;
    current: number;
    delta: number;
    deltaPercent: number;
    threshold: number;
    message: string;
}
export interface PerfChange {
    name: string;
    status: 'regression' | 'improvement' | 'unchanged' | 'new' | 'removed';
    baselineDuration?: number;
    currentDuration?: number;
    delta_ms?: number;
    deltaPercent?: number;
}
export interface PerfRegressionResult {
    changes: PerfChange[];
    regressions: number;
    improvements: number;
    unchanged: number;
    newTests: number;
    removedTests: number;
    thresholdMs: number;
    thresholdPercent: number;
}
export interface PerfCheckOptions {
    thresholdMs?: number;
    thresholdPercent?: number;
}
export declare class PerfRegressionTracker {
    private dbPath;
    private records;
    private thresholds;
    constructor(dbPath: string);
    private _load;
    private _save;
    record(suite: string, metrics: PerfMetrics): void;
    compare(suite: string, baseline?: string): PerfComparison;
    private _compareRecords;
    generateReport(): string;
    setThresholds(config: ThresholdConfig): void;
    getRecords(suite: string): PerfRecord[];
    listSuites(): string[];
}
export declare function loadPerfReport(filePath: string): SuiteResult;
export declare function buildDurationMap(suite: SuiteResult): Map<string, number>;
export declare function detectPerfChanges(baseline: SuiteResult, current: SuiteResult, options?: PerfCheckOptions): PerfRegressionResult;
export declare function formatPerfChanges(result: PerfRegressionResult): string;
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