Cron
Use the cron tool to schedule reminders or recurring tasks.
Three Modes
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Reminder - message is sent directly to user
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Task - message is a task description, agent executes and sends result
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One-time - runs once at a specific time, then auto-deletes
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)
One-time scheduled task (compute ISO datetime from current time):
cron(action="add", message="Remind me about the meeting", at="<ISO datetime>")
Timezone-aware cron:
cron(action="add", message="Morning standup", cron_expr="0 9 * * 1-5", tz="America/Vancouver")
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"
9am Vancouver time daily cron_expr: "0 9 * * *", tz: "America/Vancouver"
at a specific time at: ISO datetime string (compute from current time)
Timezone
Use tz with cron_expr to schedule in a specific IANA timezone. Without tz , the server's local timezone is used.