import type { Usage } from '../Usage';
/**
 * Formats usage price for display in prompt status lines and task details.
 * Examples:
 * - "$0.12" (certain)
 * - "~$3.05" (uncertain)
 * - "$0.00" (zero cost)
 * - "<$0.01" (tiny non-zero cost)
 *
 * @private internal utility of the prompt runners and the Agents Server task details
 */
export declare function formatUsagePrice(usage: Usage): string;