/**
 * @fileoverview Risk trend detection for supply chain attack monitoring
 * @module @skillsmith/core/security/risk-trend
 * @see SMI-3874: Risk Trend Detection
 */
import type { RiskScoreSnapshot } from '../repositories/RiskScoreHistoryRepository.js';
export interface RiskTrendResult {
    anomaly: boolean;
    message: string;
    currentScore: number;
    previousScore: number | null;
    delta: number;
}
/**
 * Detect anomalous risk score changes that may indicate supply chain attacks.
 * Thresholds: 20pt warning, 35pt critical, 40pt boundary crossing.
 */
export declare function detectRiskTrend(currentScore: number, history: RiskScoreSnapshot[], options?: {
    isNewCategoryBaseline?: boolean;
}): RiskTrendResult;
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