/**
 * TradePlan capability — the model's path to trade authorization.
 *
 * `propose` validates the intended trades, persists a pending plan, and
 * BLOCKS until the approval surface decides (TUI prompt, dashboard client,
 * or headless auto-policy). Without any approval surface the proposal fails
 * closed — non-interactive runs reject trades unless --approve-trades was
 * granted and the total fits the --max-spend envelope.
 */
import type { CapabilityHandler } from '../agent/types.js';
export declare function createTradePlanCapability(): CapabilityHandler;