import { InventoryData, StructuralDuplicationSummary } from '../types';
export interface PatternIndexLocation {
    file: string;
    line: number;
}
export interface PatternIndexEntry {
    normalized: string;
    locations: PatternIndexLocation[];
}
export interface PatternIndex {
    version: 1;
    generatedAt: string;
    windowSize: number;
    fingerprints: Record<string, PatternIndexEntry>;
}
/**
 * Generates a pattern-index.json artifact that maps normalized code block
 * fingerprints to their source locations. Used by the structural-duplication
 * guard for cross-file pattern matching.
 */
export declare function generatePatternIndex(inventory: InventoryData, targetDir: string): PatternIndex;
/**
 * Analyzes a PatternIndex to produce a human-readable summary of
 * existing structural duplication across the project.
 */
export declare function analyzePatternIndex(index: PatternIndex): StructuralDuplicationSummary;