export interface ImpactResult {
    changedFiles: string[];
    affectedTests: ImpactedTest[];
    unaffectedCount: number;
}
export interface ImpactedTest {
    name: string;
    file: string;
    reason: string;
}
/**
 * Analyze which tests are affected by a set of changed files.
 *
 * Heuristics:
 * - If a test references a tool whose name appears in a changed file path, it's affected
 * - If a test's trace file references a changed file, it's affected
 * - If a changed file is a core module, all tests may be affected
 */
export declare function analyzeImpact(changedFiles: string[], suiteFiles: string[]): ImpactResult;
/**
 * Format impact analysis results.
 */
export declare function formatImpact(result: ImpactResult): string;
/**
 * Parse a git diff --name-only output into changed file list.
 */
export declare function parseGitDiffOutput(output: string): string[];
/**
 * Compute estimated savings from impact analysis.
 */
export declare function estimateSavings(result: ImpactResult): {
    runtimePercent: number;
    costPercent: number;
};
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