/**
 * Formatters for risk trend output.
 * Provides terminal (chalk-coloured) and JSON output for TrendResult.
 */
import type { TrendResult } from "../types.js";
/**
 * Format TrendResult for terminal display.
 * Shows a chronological timeline with per-entry score, delta, and cause lines.
 */
export declare function formatTrendTerminal(result: TrendResult): string;
/**
 * Format TrendResult as a JSON string.
 * Produces valid JSON matching TrendResult shape (TREND-04).
 */
export declare function formatTrendJson(result: TrendResult): string;
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