/**
 * Query and traversal engines
 *
 * This module provides intelligent query engines for:
 * - Zone of Proximal Development (ZPD) calculation
 * - Learning path generation
 * - Spaced repetition scheduling
 *
 * @packageDocumentation
 */
export type { QueryOperator, QueryFilter, QuerySort, QueryPagination, SkillQuery, ZPDResult, LearningPath, LearningSession, ReviewSchedule, ReviewItem, ZPDOptions, PathOptions, ReviewOptions, } from '../types/query.js';
export { ZPDCalculator, createZPDCalculator, ZPD_DEFAULTS, type LearnerProfile, } from './zpd.js';
export { PathGenerator, createPathGenerator, PATH_DEFAULTS, type LearnerState, } from './path.js';
export { SpacedRepetitionScheduler, createSpacedRepetitionScheduler, calculateSM2, REVIEW_DEFAULTS, SM2_CONSTANTS, type ReviewQuality, type ReviewState, type SM2Result, } from './spaced-repetition.js';
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