/**
 * Test Impact Analysis — Smart test ordering based on risk signals.
 *
 * Analyzes test files to determine priority based on:
 * - File content patterns (security, safety keywords)
 * - Recent failure history
 * - Stability over time
 * - File modification recency
 */
export type RiskLevel = 'HIGH' | 'MEDIUM' | 'LOW';
export interface TestRiskAssessment {
    file: string;
    name: string;
    risk: RiskLevel;
    score: number;
    reasons: string[];
}
export interface ImpactAnalysisResult {
    assessments: TestRiskAssessment[];
    totalFiles: number;
    highRisk: number;
    mediumRisk: number;
    lowRisk: number;
}
export interface ImpactAnalysisOptions {
    /** History file for failure tracking */
    historyFile?: string;
    /** Days to consider "stable" if no failures */
    stableDays?: number;
    /** Changed files to check for impact */
    changedFiles?: string[];
}
/**
 * Analyze risk of a single test file.
 */
export declare function analyzeTestFile(filePath: string): TestRiskAssessment;
/**
 * Analyze all test files in a directory.
 */
export declare function analyzeTestDirectory(dir: string, options?: ImpactAnalysisOptions): ImpactAnalysisResult;
/**
 * Format impact analysis results for display.
 */
export declare function formatImpactAnalysis(result: ImpactAnalysisResult): string;
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