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Cronexplain
by
rogue-agent1
· GitHub ↗
· v1.0.0
· MIT-0
117
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Install in OpenClaw
/install cronexplain
Description
Explain cron expressions in plain English and calculate next run times. Use when asked to decode a crontab entry, understand a cron schedule, check when a cr...
README (SKILL.md)
cronexplain 📅
Cron expression explainer with next-run calculator.
Commands
# Explain a cron expression
python3 scripts/cronexplain.py "30 9 * * 1-5"
# → at minute 30; at 09:00; on Mon, Tue, Wed, Thu, Fri
# Show next N run times
python3 scripts/cronexplain.py "0 */4 * * *" -n 5
# Monthly schedule
python3 scripts/cronexplain.py "0 0 1,15 * *" -n 3
Supported Syntax
- Wildcards:
* - Ranges:
1-5(Mon-Fri) - Steps:
*/15(every 15 minutes) - Lists:
1,15(1st and 15th) - Combined:
0-30/10(every 10 min in first half hour)
Fields (standard 5-field cron)
minute hour day_of_month month day_of_week
Usage Guidance
This skill appears internally consistent and low-risk: it includes a small Python script that parses cron expressions and prints human-friendly descriptions and next run times. Before installing, note that you need Python 3 available to run the script (SKILL.md uses 'python3' even though 'required binaries' metadata is empty). If you plan to let an agent execute it autonomously, confirm the agent has Python 3 and run the script in a restricted environment if you want extra caution. If you want to be thorough, you can open the included scripts (they are short and readable) and run them locally on sample cron expressions to verify behavior; the code does not perform network I/O or read/write system files or secrets.
Capability Analysis
Type: OpenClaw Skill
Name: cronexplain
Version: 1.0.0
The skill is a legitimate utility for parsing and explaining cron expressions. The Python script (cronexplain.py) uses standard libraries (argparse, datetime) to process input and contains no network access, file system operations, or shell execution logic. No evidence of prompt injection or malicious intent was found in the instructions or code.
Capability Assessment
Purpose & Capability
Name/description match the delivered artifacts: the repository contains a cron expression parser/explainer and a next-run calculator. There are no unrelated environment variables, binaries, or external services requested.
Instruction Scope
SKILL.md instructs running the included Python script (python3 scripts/cronexplain.py). The skill metadata lists 'zero dependencies' but does not declare 'python3' as a required binary — this is a minor inconsistency (practical requirement: Python 3 must be available to run the script). The instructions do not ask the agent to read unrelated files, access environment variables, or transmit data externally.
Install Mechanism
No install spec / no downloads. This is an instruction-only skill that ships its Python files with the skill bundle. Nothing will be fetched from external URLs or written to system paths during install.
Credentials
The skill requests no environment variables, no credentials, and no config paths. The code does not access os.environ or other secrets. There is no indication of disproportionate credential or env access.
Persistence & Privilege
always is false and the skill does not attempt to modify other skills or system-wide configuration. It only prints explanations and computed run times when executed.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install cronexplain - After installation, invoke the skill by name or use
/cronexplain - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
Initial release of cronexplain – easily decode cron schedules.
- Explains cron expressions in plain English.
- Calculates and displays next run times.
- Supports wildcards, ranges, steps, and lists in standard 5-field cron syntax.
- Zero dependencies; runs with standard Python.
- Useful for translating crontab entries or checking job schedules.
Metadata
Frequently Asked Questions
What is Cronexplain?
Explain cron expressions in plain English and calculate next run times. Use when asked to decode a crontab entry, understand a cron schedule, check when a cr... It is an AI Agent Skill for Claude Code / OpenClaw, with 117 downloads so far.
How do I install Cronexplain?
Run "/install cronexplain" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Cronexplain free?
Yes, Cronexplain is completely free, licensed under MIT-0. You can download, install and use it at no cost.
Which platforms does Cronexplain support?
Cronexplain is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Cronexplain?
It is built and maintained by rogue-agent1 (@rogue-agent1); the current version is v1.0.0.
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