A scheduling skill for cron, a system that runs actions at specified times or intervals. It supports both direct reminders and recurring tasks that an agent carries out.

Use it to schedule one-time or recurring reminders, run periodic checks, list scheduled jobs, and remove jobs that are no longer needed.

It prevents scheduled work from being forgotten and separates simple notifications from tasks that need an agent to perform work.

cron — Skill for Claude Code and Codex by AI-888: A scheduling skill for cron, a system that runs…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/ai-888/06-aether/cron

Any agent

npx skills add AI-888/06-Aether --skill cron

Clone the repo

git clone --depth 1 https://github.com/AI-888/06-Aether

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/ai-888/06-aether/cron.svg)](https://agentmods.dev/skills/ai-888/06-aether/cron)

Your own site

<a href="https://agentmods.dev/skills/ai-888/06-aether/cron"><img src="https://agentmods.dev/badge/skills/ai-888/06-aether/cron.svg" alt="Measured on agentmods" height="20"></a>

Per session 8 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 244 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin 100% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00008	$0.00244
Opus 5	$0.00004	$0.00122
Sonnet 5	$0.00002	$0.00049
Haiku 4.5	$0.00001	$0.00024

Measured 5d ago against content hash 77a57ce80a18, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

cron scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

100% identical to cron — 17 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

nanobot/skills/cron/SKILL.md · 44 lines

What it actually says

Cron

Use the cron tool to schedule reminders or recurring tasks.

Two Modes

Reminder - message is sent directly to user
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"

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

5d ago First seen · 44 lines · 8 tokens per session scan A 77a57ce80a18

Subscribe to this mod's changes

cron is a skill published in the GitHub repository AI-888/06-Aether (11 stars, last pushed 4mo ago), licensed MIT. It adds 8 tokens to every session and 244 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to cron, differing in 17 lines, and is treated as a copy.

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cron