/**
 * Upgrade CLI Command for Core Build
 * Check for updates and guide upgrade process
 * @requirement REQ-V2-003 - Upgrade command
 * @requirement v2.1.4-hotfix - Sync Cursor .mdc rules
 */
import { Command } from 'commander';
/**
 * Register upgrade command
 * @requirement REQ-V2-003 - CLI upgrade command
 * @requirement v2.1.4-hotfix - Add --sync-rules option
 * @requirement FIX-UPGRADE-COMMAND - Fix hardcoded version, add npm check
 */
export declare function registerUpgradeCommand(program: Command): void;