/**
 * Upgrade Command
 *
 * Self-upgrades Shep CLI to the latest published version.
 * Checks current vs latest version before running npm install.
 *
 * Usage: shep upgrade
 */
import { Command } from 'commander';
import { spawn as defaultSpawn } from 'node:child_process';
type SpawnFn = typeof defaultSpawn;
/**
 * Create the upgrade command
 */
export declare function createUpgradeCommand(spawnFn?: SpawnFn): Command;
export {};
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