/**
 * pi-bus Cron Extension — OS-scheduled task delivery via bus inbox.
 *
 * Three tools:
 *   - schedule_cron:  register a cron task via launchd plist (inline-gate:
 *                      first call prompts for confirmation, second with
 *                      confirmed=true creates the plist).
 *   - list_cron:      list all registered cron jobs.
 *   - remove_cron:    remove a cron job (unload plist + delete file + drop
 *                      from registry).
 *
 * Storage: `.pi-mind/cron/jobs.json` — flat JSON array of job records.
 *
 * Scheduling: each job gets a macOS launchd plist under
 * `~/Library/LaunchAgents/`. The plist executes `node <bindir>/cron-trigger.mjs`
 * which imports from `@shog-lab/pi-bus/lib/deliver` and writes a message
 * into the target agent's bus inbox. If the target agent isn't online, the
 * session directory doesn't exist and the write fails silently.
 *
 * Cron expression parsing is intentionally minimal — handles common patterns
 * (specific time, weekday, day-of-month). Complex expressions that launchd
 * can't represent are rejected with a helpful error.
 */
import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
export default function cronExtension(pi: ExtensionAPI): void;
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