import { ClassifiedGraph, Issue } from '../../core/GraphTypes';
import { AnalysisRule, RuleConfig } from '../types';
/**
 * Detects modules with too many incoming dependencies (fan-in).
 * High fan-in indicates a module that many others depend on — potential bottleneck.
 */
export declare class FanInRule implements AnalysisRule {
    id: string;
    name: string;
    category: "coupling";
    defaultSeverity: "medium";
    private readonly defaultThreshold;
    run(graph: ClassifiedGraph, config?: RuleConfig): Issue[];
}
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