cron

# Scheduled Tasks (Cron) You have access to scheduled task tools (`cron_register`, `cron_list`, `cron_remove`) for registering recurring automated tasks using standard 5-field cron expressions (`minute hour day_of_month month day_of_week`). ## When to Use - The user asks for a recurring/periodic task: reminders, periodic reports, status checks, polling. - The user asks to manage existing scheduled tasks (list, remove). - The user's phrasing implies "every X", "每天/每周/每月", "at 9am daily", etc. Do NOT register a cron task just because the user mentions a time — only when they explicitly want it to repeat automatically. ## Tools | Tool | Purpose | | --- | --- | | `cron_register(expression, prompt)` | Register a new scheduled task. `prompt` is the user message submitted when the task fires. | | `cron_list()` | List all registered tasks with status, next fire time, and prompt. | | `cron_remove(id)` | Remove a task by its ID (shown by `cron_list`). | ## Cron Expression Format Standard 5-field cron expression: ``` minute hour day_of_month month day_of_week ``` Examples: - `*/5 * * * *` — every 5 minutes - `0 9 * * *` — every day at 09:00 - `0 9 * * 1-5` — weekdays at 09:00 - `30 8 1 * *` — the 1st of each month at 08:30 Use `cron_list` to verify the registered task and its next fire time after registering. ## Safety `cron_register` schedules future agent turns that fire without further user confirmation — treat it like delegating execution authority. Before registering:...