import type { CallGraph, ImpactResult, ImpactOptions, AffectedSymbol } from "./types";
/**
 * Analyzes the impact of changing a symbol or file.
 * Uses BFS reverse-dependency traversal to find all affected code.
 */
export declare class ImpactAnalyzer {
    private graph;
    constructor(graph: CallGraph);
    /**
     * Analyze the impact of changing a specific symbol.
     */
    analyzeSymbol(symbolName: string, options?: ImpactOptions): ImpactResult;
    /**
     * Analyze the impact of changing a specific file.
     */
    analyzeFile(filePath: string, options?: ImpactOptions): ImpactResult;
    /**
     * Analyze the impact of a git diff (unified format).
     *
     * Parses changed file paths and line ranges from the diff, finds all symbols
     * overlapping those ranges, then runs BFS reverse-dependency traversal on each
     * to find the combined blast radius.
     */
    analyzeDiff(diffContent: string, options?: ImpactOptions): ImpactResult;
    /**
     * Find the highest-risk symbols in the codebase.
     */
    findRiskiestSymbols(topN?: number): AffectedSymbol[];
    /**
     * Find orphan symbols (defined but never called).
     */
    findOrphans(): AffectedSymbol[];
    /**
     * Parse a git unified diff into { filePath: [lineStart, lineEnd][] }.
     * Matches:
     *   +++ b/path/to/file.ts
     *   @@ -oldStart,oldCount +newStart,newCount @@
     */
    private parseDiff;
    private calculateSummary;
    private generateRecommendations;
    private isTestFile;
    private createEmptyResult;
}
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