import type { ConfidenceScore, Coordinates, SourceResult } from '../types/index.js';
/**
 * Count sources whose scope includes this location — i.e., the denominator
 * used by `calculateConfidence`. Exposed so callers (e.g., configHints) can
 * compute each source's proportional contribution to the overall score.
 */
export declare function countApplicableSources(coords: Coordinates): number;
/**
 * Confidence = fraction of location-applicable sources that returned fresh ok data.
 *
 *   overall = okCount / applicableCount
 *
 * Sources that don't apply to the query location (e.g., NOAA NWS outside the US)
 * are excluded from both numerator and denominator so geography doesn't penalise
 * the score. A source is "ok" only if `ok === true` AND its data is not stale
 * (age ≤ `STALE_MULTIPLIER × freshnessMinutes`).
 */
export declare function calculateConfidence(results: SourceResult<unknown>[], coords: Coordinates): ConfidenceScore;