cron-ops

cron-ops is a skill for Claude Code, Codex from czl9707/build-your-own-openclaw. It costs 13 tokens per session (619 once invoked), scanned C, original, MIT.

A scheduler for running tasks automatically at set times or repeating intervals. It also supports one-time jobs that remove themselves after running.

In plain words
What is it for?
Use it to create, view, and delete cron jobs, such as daily tasks, reminders, delayed notifications, or weekly maintenance jobs.
Why use it?
It avoids relying on memory or manually starting recurring tasks. You can keep scheduled jobs organized and remove them when they are no longer needed.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to create, view, and delete cron jobs, such as daily tasks, reminders, delayed notifications, or weekly maintenance jobs.

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Install with agentmods
npx agentmods add skills/czl9707/build-your-own-openclaw/cron-ops
About the project

Build Your Own OpenClaw is a step-by-step tutorial and runnable codebase for creating an AI agent, progressing from a chat loop to tools, skills, memory, web access, event-driven operation, channels, scheduling, and multiple agents. It is intended for people learning how agent systems are built, and the catalogue entries correspond to skills used in the example project.

czl9707/build-your-own-openclaw · 1,878 stars · on GitHub · build-your-own-openclaw.kiyo-n-zane.com

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.

Any agent
npx skills add czl9707/build-your-own-openclaw --skill cron-ops
Clone the repo
git clone --depth 1 https://github.com/czl9707/build-your-own-openclaw

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.

agentmods badge for cron-ops

README.md
[![agentmods](https://agentmods.dev/badge/skills/czl9707/build-your-own-openclaw/cron-ops/github.svg)](https://agentmods.dev/skills/czl9707/build-your-own-openclaw/cron-ops)
Your own site
<a href="https://agentmods.dev/skills/czl9707/build-your-own-openclaw/cron-ops"><img src="https://agentmods.dev/badge/skills/czl9707/build-your-own-openclaw/cron-ops/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cron-ops

Your own site · 80×15
<a href="https://agentmods.dev/skills/czl9707/build-your-own-openclaw/cron-ops"><img src="https://agentmods.dev/badge/skills/czl9707/build-your-own-openclaw/cron-ops.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 619 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00013 $0.00619
Opus 5 $0.00006 $0.00309
Sonnet 5 $0.00003 $0.00124
Haiku 4.5 $0.00001 $0.00062

Measured 12d ago against content hash 3a6fb42de349, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade C, and why

cron-ops scanned grade C with 1 finding 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 12d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf {{crons_path}}/<cron-name>
default_workspace/skills/cron-ops/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Help users manage scheduled cron jobs in pickle-bot.

What is a Cron?

A cron is a scheduled task that runs at specified intervals. Crons are stored as CRON.md files at {{crons_path}}/<name>/CRON.md.

Schedule Syntax

Standard cron format: minute hour day month weekday

Examples:

  • 0 9 * * * - Every day at 9:00 AM
  • */30 * * * * - Every 30 minutes
  • 0 0 * * 0 - Every Sunday at midnight

One-Off Jobs

Set one_off: true for jobs that should run only once. After execution, the cron is automatically deleted.

Use this for:

  • Reminders at a specific future time
  • Scheduled one-time tasks
  • Delayed notifications

Operations

Create

  1. Ask what task should run and when
  2. Determine the schedule
  3. Ask which agent should run the task
  4. Ask for a brief description of what the cron does
  5. If the task should run only once (e.g., "remind me tomorrow"), set one_off: true
  6. Create the directory and CRON.md file

List

Use bash to list directories:

ls {{crons_path}}

Delete

  1. List available crons
  2. Confirm which one to delete
  3. Use bash to remove:
rm -rf {{crons_path}}/<cron-name>

Cron Prompt Guidelines

Cron jobs run in the background with no direct output to the user. The agent executing the cron has no conversation context.

When the user asks to be notified (e.g., "tell me", "let me know", "remind me"):

  • Include post_message instruction in the prompt

When the user doesn't ask for notification:

  • No post_message needed (e.g., background cleanup, data processing)

Cron Template

---
name: Cron Name
description: Brief description of what this cron does
agent: pickle
schedule: "0 9 * * *"
one_off: false  # Set to true for one-time jobs (optional, defaults to false)
---

Task description for the agent to execute.

With notification:

---
name: Daily Summary
description: Sends a daily summary of activity
agent: pickle
schedule: "0 9 * * *"
---

Check my inbox and use post_message to send me a summary.

Read the full file on GitHub · 105 lines

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.

  1. 12d ago First seen · 105 lines · 13 tokens per session scan C 3a6fb42de349

Subscribe to this mod's changes

cron-ops is a skill published in the GitHub repository czl9707/build-your-own-openclaw (1,878 stars, last pushed 2mo ago), licensed MIT. It adds 13 tokens to every session and 619 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.