# Send Billy — Cron Guardrails Pack to your agent
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
## Fast path
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
## Suggested prompts
### New install

```text
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
```
### Upgrade existing

```text
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
```
## Machine-readable fields
```json
{
  "schemaVersion": "1.0",
  "item": {
    "slug": "billy-cron-guardrails-pack",
    "name": "Billy — Cron Guardrails Pack",
    "source": "tencent",
    "type": "skill",
    "category": "AI 智能",
    "sourceUrl": "https://clawhub.ai/Highlander89/billy-cron-guardrails-pack",
    "canonicalUrl": "https://clawhub.ai/Highlander89/billy-cron-guardrails-pack",
    "targetPlatform": "OpenClaw"
  },
  "install": {
    "downloadUrl": "/downloads/billy-cron-guardrails-pack",
    "sourceDownloadUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=billy-cron-guardrails-pack",
    "sourcePlatform": "tencent",
    "targetPlatform": "OpenClaw",
    "packageFormat": "ZIP package",
    "primaryDoc": "SKILL.md",
    "includedAssets": [
      "SKILL.md",
      "scripts/cron-lint.py"
    ],
    "downloadMode": "redirect",
    "sourceHealth": {
      "source": "tencent",
      "slug": "billy-cron-guardrails-pack",
      "status": "healthy",
      "reason": "direct_download_ok",
      "recommendedAction": "download",
      "checkedAt": "2026-04-30T02:15:20.968Z",
      "expiresAt": "2026-05-07T02:15:20.968Z",
      "httpStatus": 200,
      "finalUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=billy-cron-guardrails-pack",
      "contentType": "application/zip",
      "probeMethod": "head",
      "details": {
        "probeUrl": "https://wry-manatee-359.convex.site/api/v1/download?slug=billy-cron-guardrails-pack",
        "contentDisposition": "attachment; filename=\"billy-cron-guardrails-pack-0.1.1.zip\"",
        "redirectLocation": null,
        "bodySnippet": null,
        "slug": "billy-cron-guardrails-pack"
      },
      "scope": "item",
      "summary": "Item download looks usable.",
      "detail": "Yavira can redirect you to the upstream package for this item.",
      "primaryActionLabel": "Download for OpenClaw",
      "primaryActionHref": "/downloads/billy-cron-guardrails-pack"
    },
    "validation": {
      "installChecklist": [
        "Use the Yavira download entry.",
        "Review SKILL.md after the package is downloaded.",
        "Confirm the extracted package contains the expected setup assets."
      ],
      "postInstallChecks": [
        "Confirm the extracted package includes the expected docs or setup files.",
        "Validate the skill or prompts are available in your target agent workspace.",
        "Capture any manual follow-up steps the agent could not complete."
      ]
    }
  },
  "links": {
    "detailUrl": "https://openagent3.xyz/skills/billy-cron-guardrails-pack",
    "downloadUrl": "https://openagent3.xyz/downloads/billy-cron-guardrails-pack",
    "agentUrl": "https://openagent3.xyz/skills/billy-cron-guardrails-pack/agent",
    "manifestUrl": "https://openagent3.xyz/skills/billy-cron-guardrails-pack/agent.json",
    "briefUrl": "https://openagent3.xyz/skills/billy-cron-guardrails-pack/agent.md"
  }
}
```
## Documentation

### cron-guardrails-pack

Author: Billy (SAPCONET)

### 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:

python3 scripts/cron-lint.py /path/to/crontab.txt

Lint stdin:

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

*/15 * * * * /usr/local/bin/send-inbox --channel ops --tag NO_REPLY --message "NO_REPLY | cron heartbeat"
## Trust
- Source: tencent
- Verification: Indexed source record
- Publisher: Highlander89
- Version: 0.1.1
## Source health
- Status: healthy
- Item download looks usable.
- Yavira can redirect you to the upstream package for this item.
- Health scope: item
- Reason: direct_download_ok
- Checked at: 2026-04-30T02:15:20.968Z
- Expires at: 2026-05-07T02:15:20.968Z
- Recommended action: Download for OpenClaw
## Links
- [Detail page](https://openagent3.xyz/skills/billy-cron-guardrails-pack)
- [Send to Agent page](https://openagent3.xyz/skills/billy-cron-guardrails-pack/agent)
- [JSON manifest](https://openagent3.xyz/skills/billy-cron-guardrails-pack/agent.json)
- [Markdown brief](https://openagent3.xyz/skills/billy-cron-guardrails-pack/agent.md)
- [Download page](https://openagent3.xyz/downloads/billy-cron-guardrails-pack)