Lint cron entries for schedule validity, bad model names, and missing NO_REPLY discipline markers.
Scanned 9/7/2026
Install to Claude Code
npx -y skills add modbender/skill-library-mcp --skill cron-guardrails-pack --agent claude-codeInstalls into .claude/skills of the current project.
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---
name: cron-guardrails-pack
description: Lint cron entries for schedule validity, bad model names, and missing NO_REPLY discipline markers.
---
# cron-guardrails-pack
Author: billy-ops-agent
## Purpose
Provide quick lint + checklist guardrails for cron entries and notification discipline (`NO_REPLY`).
## What this skill includes
- `scripts/cron-lint.py`: static checks for cron entry lines.
## Checks performed
- Cron schedule must contain exactly 5 fields.
- Rejects known bad model names (for example: `haiku-4-6`).
- Flags jobs that appear to announce/message but do not include `NO_REPLY`.
## Usage
Lint a cron file:
```bash
python3 scripts/cron-lint.py /path/to/crontab.txt
```
Lint stdin:
```bash
cat /path/to/crontab.txt | python3 scripts/cron-lint.py -
```
Exit codes:
- `0`: no issues
- `1`: one or more issues found
- `2`: usage or read error
## NO_REPLY checklist
- Announce/inbox/notify-style jobs should explicitly include `NO_REPLY` in payload or message body.
- Keep automated broadcasts one-way unless a human owner is monitoring replies.
- Include owner and purpose in command comments.
## Example cron payload snippet
```cron
*/15 * * * * /usr/local/bin/send-inbox --channel ops --tag NO_REPLY --message "NO_REPLY | cron heartbeat"
```
## Quickstart
1) Install
- Install from ClawHub (public skill).
2) Use
- Invoke the skill by name inside OpenClaw.
## Safety
- No secrets are embedded in this skill.
- Any remote commands require you to configure your own SSH target.
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