import type { KnowledgeGapSignalPayload } from '../engine/types.js';
/**
 * Normalize a captured topic phrase to a validator-compatible
 * kebab-case slug. Matches the spec §2.3 contract — must always
 * produce strings satisfying ^[a-z0-9]+(-[a-z0-9]+)*$ or empty string.
 */
export declare function normalizeTopic(raw: string): string;
/**
 * Reads an absolute path to a lessons.md file and returns synthetic
 * gap-signal payloads. Returns [] on missing/empty file (no throws).
 *
 * Lens I owns path resolution; this scanner reads exactly the path
 * it's given.
 */
export declare function scanLessonsForGaps(absPath: string): KnowledgeGapSignalPayload[];
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