/**
 * Candidate Extractor Module
 *
 * Find messages likely to contain "things to do" activities using cheap heuristics.
 * No AI cost - pure regex and URL pattern matching.
 */
import type { ExtractorOptions, ExtractorResult, ParsedMessage } from '../../types';
export { type ActivityLinkOptions, extractActivityLinks } from './activity-links';
export { AGREEMENT_KEYWORDS, EXCLAMATION_KEYWORDS, HIGH_SIGNAL_KEYWORDS, SUGGESTION_KEYWORDS } from './intent-signals';
export { ACTIVITY_KEYWORDS, ACTIVITY_PATTERNS, EXCLUSION_PATTERNS } from './patterns';
export { classifyUrl, extractGoogleMapsCoords, isActivityUrl, isSocialUrl } from './url-classifier';
/**
 * Extract candidate messages using cheap heuristics (regex + URL patterns).
 *
 * This is a fast, zero-cost pass before expensive AI classification.
 * For semantic search, use extractCandidatesByEmbeddings().
 * For both combined, use extractCandidates().
 */
export declare function extractCandidatesByHeuristics(messages: readonly ParsedMessage[], options?: ExtractorOptions): ExtractorResult;
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