/**
 * Agentic QE v3 - Quality Signal Calculator
 * ADR-033: Lambda-stability decisions with speculative execution
 *
 * This module computes quality signals from layer results for early exit decisions.
 * The lambda value represents overall quality confidence on a 0-100 scale.
 */
import { LayerResult, QualitySignal } from './types';
/**
 * Calculate quality signal from a layer result
 *
 * The quality signal includes:
 * - Lambda: Overall quality score (0-100) based on pass rate, coverage, and stability
 * - Boundary edges: Count of metrics near the 70% threshold
 * - Boundary concentration: How concentrated issues are
 * - Control flags for special conditions
 *
 * @param layerResult - Result from executing a test layer
 * @param previousSignal - Previous quality signal for delta calculation
 * @returns Quality signal for early exit decision
 */
export declare function calculateQualitySignal(layerResult: LayerResult, previousSignal?: QualitySignal): QualitySignal;
/**
 * Count quality partitions in the results
 *
 * Partitions represent distinct clusters of quality issues.
 * More partitions suggest more investigation is needed.
 */
export declare function countQualityPartitions(layerResult: LayerResult): number;
/**
 * Calculate lambda stability between two signals
 *
 * Stability is the inverse of the relative change in lambda.
 * High stability (close to 1) indicates consistent quality signals.
 *
 * @param current - Current quality signal
 * @param previous - Previous quality signal
 * @returns Stability value between 0 and 1
 */
export declare function calculateLambdaStability(current: QualitySignal, previous?: QualitySignal): number;
/**
 * Calculate combined confidence from quality signal
 *
 * Confidence combines lambda strength, stability, and boundary dispersion.
 *
 * @param signal - Quality signal
 * @param stability - Lambda stability value
 * @returns Confidence value between 0 and 1
 */
export declare function calculateConfidence(signal: QualitySignal, stability: number): number;
/**
 * Create a quality signal from basic metrics
 *
 * Utility function for creating signals without full layer results.
 */
export declare function createQualitySignal(passRate: number, coverage: number, flakyRatio: number, previousLambda?: number, layerIndex?: number): QualitySignal;
/**
 * Check if quality signal indicates stable exit conditions
 */
export declare function isStableForExit(signal: QualitySignal, minLambda: number, minStability: number): boolean;
//# sourceMappingURL=quality-signal.d.ts.map