Cron Builder

    2

    Convert natural language to cron expressions and explain complex schedules with run-time projections.

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    Works with the AI tools you already use

    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIGitHub CopilotGitHub CopilotGemini CLIGemini CLI+17 more

    See it in action

    You say

    Create a standard 5-field cron expression for a job that needs to run every weekday at 9 AM and show the next 5 run times starting from May 20, 2024.

    Your agent does

    Cron Expression: 0 9 * * 1-5 Format: 5-field (Standard) Plain English: Every weekday (Mon-Fri) at 9:00 AM

    Next 5 Runs (UTC):

    1. 2024-05-20 09:00
    2. 2024-05-21 09:00
    3. 2024-05-22 09:00
    4. 2024-05-23 09:00
    5. 2024-05-24 09:00

    What you get

    Generate cron expressions from natural language descriptionsTranslate legacy cron strings into plain English for documentationCalculate the next 5 execution timestamps for any scheduleVerify syntax for GitHub Actions or AWS EventBridge rules

    About this skill

    What it does

    This skill bridges the gap between natural language and complex schedule synchronization. It allows developers to describe timing requirements in plain English and receive precise cron expressions, or conversely, paste cryptic cron strings to get immediate, human-readable explanations. It handles the nuances of different cron syntax variations without requiring external documentation.

    Why use this skill

    Manually calculating cron schedules is prone to "off-by-one" errors and timezone confusion. Unlike a generic AI prompt, this skill is specifically tuned to recognize cross-platform syntax differences (like Quartz vs. Unix) and provides a structured breakdown including the next five execution times. This ensures your background jobs, GitHub Actions, or Kubernetes CronJobs run exactly when you intend them to.

    Supported Formats & Tools

    • Standard 5-Field: Unix crontab, GitHub Actions, and Kubernetes.
    • Extended 6/7-Field: AWS EventBridge, Spring, Quartz, and node-cron (including seconds and years).
    • Special Characters: Supports complex logic using L (Last), W (Weekday), # (Nth weekday), and ? (blank).
    • Shorthand Aliases: Handles @daily, @weekly, @hourly, and more.

    How to install

    Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.

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