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---
name: cron
description: Schedule reminders and recurring tasks.
---
# Cron
Use the `cron` tool to schedule reminders or recurring tasks.
## Two Modes
1. **Reminder** - message is sent directly to user
2. **Task** - message is a task description, agent executes and sends result
## Examples
Fixed reminder:
```
cron(action="add", message="Time to take a break!", every_seconds=1200)
```
Dynamic task (agent executes each time):
```
cron(action="add", message="Check HKUDS/nanobot GitHub stars and report", every_seconds=600)
```
List/remove:
```
cron(action="list")
cron(action="remove", job_id="abc123")
```
## Time Expressions
| User says | Parameters |
|-----------|------------|
| every 20 minutes | every_seconds: 1200 |
| every hour | every_seconds: 3600 |
| every day at 8am | cron_expr: "0 8 * * *" |
| weekdays at 5pm | cron_expr: "0 17 * * 1-5" |
