Cron Expression

# Cron Expression

Cron表达式生成、解释、常用示例、验证、下次执行时间、平台转换(Linux/AWS/GitHub Actions)

## Discovery Metadata
- Category: `coding`
- Framework: `ClawHub`
- Tags: `productivity`, `cron`, `expression`, `linux`, `aws`, `github`, `actions`

## Agent Execution Policy

This listing is **discovery metadata only**. Canonical instructions are maintained by ClawHub.

### Before Executing Actions

1. **Fetch canonical instructions** from: https://clawhub.ai/skill/cron-expression
2. **Parse the skill page** for setup, usage, and input/output requirements.
3. **Only proceed** after successfully loading and understanding the full instructions.

### If Fetch Fails

- Return `instruction_unavailable` with reason.
- Do **not** attempt to infer or improvise execution steps from this metadata alone.

## Source

- ClawHub listing: https://clawhub.ai/skill/cron-expression