/**
 * [WHO]: loop extension default export
 * [FROM]: Depends on @catui/tui, core/extensions-host/types, ./cron/cron-scheduler, ./cron-tools, ./loop-skill
 * [TO]: Auto-loaded by builtin-extensions.ts as a default extension
 * [HERE]: extensions/builtin/loop/index.ts - extension entry; /loop command, CronCreate/Delete/List tools, scheduler wiring
 *
 * Loop extension — registers /loop command, CronCreate/Delete/List tools,
 * and the unified cron scheduler.
 *
 * Modeled on Claude Code's cron/loop system (1:1 port of structure, paths
 * diverged — see migrateLegacyCronTasks):
 * - /loop skill (src/skills/bundled/loop.ts) → registered as /loop command
 * - CronCreate/Delete/List tools (src/tools/ScheduleCronTool/)
 * - Cron scheduler (src/utils/cronScheduler.ts)
 * - Cron task storage (src/utils/cronTasks.ts)
 * - Cron parser (src/utils/cron.ts)
 * - Scheduler lock (src/utils/cronTasksLock.ts)
 */
import type { ExtensionAPI } from "../../../core/extensions-host/types.js";
export default function loopExtension(api: ExtensionAPI): Promise<void>;