import type { RiskAnalysisContext, EstimationConfidence } from '../../types/index.js';
/**
 * Calculate the estimation confidence for a spec.
 * @param historicalAccuracy - optional 0-1 ratio from past estimates (1 = perfect accuracy)
 */
export declare function calculateConfidence(ctx: RiskAnalysisContext, historicalAccuracy?: number): EstimationConfidence;
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