/**
 * Orchestrates the US daily temperature-records line appended to the
 * `include_normals` output of `get_forecast` and `get_current_conditions`
 * (see design plan D4).
 *
 * Records are garnish, never load-bearing: this module resolves a station,
 * fetches its daily record table, and formats one line — but any failure
 * anywhere in that chain (no station nearby, malformed response, network
 * error, both sides missing for the date) is caught here, logged as a
 * warning, and turned into `undefined`. Callers must never let a records
 * lookup fail the primary weather response.
 */
import { AcisService } from '../services/acis.js';
import { UnitPreferences } from '../config/units.js';
/**
 * Build the "**Records for <Month Day>:** ..." line plus its attribution
 * line for a US location and calendar date, or `undefined` if records are
 * unavailable for any reason.
 *
 * @param acisService - The ACIS client.
 * @param latitude - Latitude (should already be gated to US by the caller).
 * @param longitude - Longitude.
 * @param month - Month (1-12).
 * @param day - Day of month (1-31).
 * @param prefs - Unit preferences for temperature display (defaults to imperial).
 * @returns The formatted records + attribution lines, or `undefined` on failure.
 */
export declare function getRecordsLine(acisService: AcisService, latitude: number, longitude: number, month: number, day: number, prefs?: UnitPreferences): Promise<string | undefined>;
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