/**
 * Twig Monitor — Score Diff
 * Pure functions: no side effects, no I/O.
 */
import type { ScoreResult } from '../analyzer/scorer.js';
import type { MonitorRun, ScoreDiff, MonitorDiffReport } from './types.js';
export declare function diffScores(before: ScoreResult, after: ScoreResult): ScoreDiff;
export declare function diffRuns(previous: MonitorRun, current: MonitorRun): MonitorDiffReport;