/**
 * Change Classification (Heuristic)
 *
 * Classifies changes as SURFACE/LOCAL/CROSS_CUTTING using pattern matching.
 * No LLM required — pure heuristics, runs in <5ms.
 *
 * Extracted from Charter Cloud (Operating Charter §6.1).
 */
import type { ChangeClass, GovernanceStatus, ChangeRecommendation, ChangeClassification } from '@stackbilt/types';
/**
 * Heuristic classification based on subject content.
 * Returns a suggested classification with confidence and signal list.
 */
export declare function heuristicClassify(subject: string): {
    suggestedClass: ChangeClass;
    confidence: 'HIGH' | 'MEDIUM' | 'LOW';
    signals: string[];
};
/**
 * Determine recommendation based on classification and governance status.
 */
export declare function determineRecommendation(changeClass: ChangeClass, governanceStatus: GovernanceStatus, mitigationsRequired: boolean): ChangeRecommendation;
/**
 * Format a change classification for human-readable display.
 */
export declare function formatChangeClassification(classification: ChangeClassification): string;
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