cron-management

cron-management is a skill for Claude Code, Codex from xuiltul/animaworks. It costs 40 tokens per session (3,474 once invoked), scanned A, original, Apache-2.0.

A guide for editing cron.md, a text file that defines scheduled tasks. Cron schedules use five fields to specify when a command or language-model task should run.

In plain words
What is it for?
Use it when adding, changing, or removing periodic command or language-model tasks in cron.md.
Why use it?
It prevents invalid schedule formats and keeps recurring jobs in the structure expected by the system.

Skill for Claude CodeCodex

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

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/xuiltul/animaworks/cron-management
Any agent
npx skills add xuiltul/animaworks --skill cron-management
Clone the repo
git clone --depth 1 https://github.com/xuiltul/animaworks

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-management

README.md
[![agentmods](https://agentmods.dev/badge/skills/xuiltul/animaworks/cron-management.svg)](https://agentmods.dev/skills/xuiltul/animaworks/cron-management)
Your own site
<a href="https://agentmods.dev/skills/xuiltul/animaworks/cron-management"><img src="https://agentmods.dev/badge/skills/xuiltul/animaworks/cron-management.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,474 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00040 $0.03474
Opus 5 $0.00020 $0.01737
Sonnet 5 $0.00008 $0.00695
Haiku 4.5 $0.00004 $0.00347

Measured 6d ago against content hash 72027836ac93, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

cron-management 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 6d 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.

templates/en/common_skills/cron-management/SKILL.md · 389 lines

How it starts

The opening of the file, as written. The whole thing — 389 lines — stays where its author put it; the contents beside it link to each section on GitHub.

cron.md Structure

Overall Structure

# Cron: {your_name}

## Task Name 1
schedule: 0 9 * * *
type: llm
Task description...

## Task Name 2
schedule: */5 * * * *
type: command
command: /path/to/script.sh

Rules You MUST Follow

  1. Each task must start with ## Task Name (H2 header. Do not use H3 or H1)
  2. schedule: line is required (must start with schedule: keyword. Not a ### header)
  3. Schedule must be standard 5-field cron expression only (09:00 or every Friday 17:00 are invalid)
  4. type: line is required (llm or command)
  5. Insert blank lines between tasks (for readability)

Invalid Formats

❌ ### */5 * * * *           ← Do NOT write cron expression as H3 header
❌ ### 09:00                 ← Natural language time is invalid
❌ ### Every Friday 17:00    ← Natural language schedule is invalid
❌ cron: 0 9 * * *           ← Key name must be "schedule:" (not "cron:")
❌ interval: 5m              ← Interval format is invalid
❌ schedule: 0 9 * * * *     ← 6 fields are invalid (5 fields only)

Valid Format

✅ schedule: 0 9 * * *       ← "schedule:" + space + 5-field cron expression
✅ schedule: */5 * * * *
✅ schedule: 30 21 * * *
✅ schedule: 0 17 * * 5

5-Field Cron Expression Reference

Field Structure

schedule: minute hour day month weekday
Field Position Range Description
minute 1 0-59 Minute to execute
hour 2 0-23 Hour to execute (24-hour)
day 3 1-31 Day of month
month 4 1-12 Month
weekday 5 0-6 Day of week (0=Mon, 6=Sun)

Note: Weekday is 0=Monday, 6=Sunday (APScheduler spec. Differs from standard cron where 0=Sunday)

Special Characters

Char Meaning Example
* All values * * * * * = every minute
*/n Every n */5 * * * * = every 5 minutes
n-m Range 0 9-17 * * * = every hour 9am–5pm
n,m List 0 9,12,18 * * * = 9am, noon, 6pm
n-m/s Range + step 0 9-17/2 * * * = every 2 hours 9am–5pm

Read the full file on GitHub · 389 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. 6d ago First seen · 389 lines · 40 tokens per session scan A 72027836ac93

Subscribe to this mod's changes

cron-management is a skill published in the GitHub repository xuiltul/animaworks (254 stars, last pushed yesterday), licensed Apache-2.0. It adds 40 tokens to every session and 3,474 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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