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cron-explainer

v1.0.0 approved Utilities ⬇ 1 ↑ 1/7d updated today
USK v3 ✅ Verified ⚡ Auto-Convert
⬇ Download
Install Guide↓
🤖 Agent install commands (curl / MCP / Claude Desktop)
▸ curl one-liner
curl -L -o cron-explainer.skill   "https://aiskillstore.io/v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=ClaudeCode"
▸ MCP tool call (after registering Skill Store MCP)
{
  "tool": "download_skill",
  "arguments": {
    "skill_id": "3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f",
    "platform": "ClaudeCode"
  }
}
▸ Claude Desktop / Cursor MCP config (one-time)
{
  "mcpServers": {
    "skill-store": {
      "url": "https://aiskillstore.io/mcp/"
    }
  }
}
📖 Full agent API guide: /llms.txt  ·  MCP server card

Explain cron expressions in plain English and Korean, compute next run times, and detect anti-patterns — zero external dependencies.

# cron # scheduler # devops # utilities # korean

Basic Info

Owner 👤 aiskillstore-team Category Utilities Registered 2026-04-29 Last Updated 2026-04-29 Latest Version 1.0.0 Packaged At 2026-04-29 Vetting Status approved Downloads 1 Checksum (SHA256) 45456e353d34823705d13bb94ea30d8ee7afd6397a1b89fcaa6a5af13f4a19dd

⚡ AGENT INFO USK v3

Capabilities
cron_expression_parsing human_readable_schedule next_run_computation schedule_audit korean_language_support
Permissions
✗ network
✗ filesystem
✗ subprocess
Interface
type: cli   entry_point: main.py   runtime: python3   call_pattern: stdin_stdout
Agent API
# 스킬 스키마 조회 (에이전트가 호출 방법을 파악) GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/schema # 플랫폼별 자동 변환 다운로드 GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=OpenClaw GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=ClaudeCode GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=ClaudeCodeAgentSkill GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=Cursor GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=GeminiCLI GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=CodexCLI GET /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=CustomAgent

Installation

Compatible Platforms any

1
Install the skill using openclaw_skill_manager.py.
python openclaw_skill_manager.py --install cron-explainer
2
Verify installation
python openclaw_skill_manager.py --list-installed
3
Install a specific version (optional)
python openclaw_skill_manager.py --install cron-explainer --version 1.0.0
1
Download the skill package.
curl -O https://aiskillstore.io/v1/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download
2
Place it in the Claude Code commands directory.
unzip cron-explainer.skill -d ~/.claude/commands/cron-explainer/
3
Use it as a slash command in Claude Code.
/cron-explainer
1
Download the Agent Skills package.
curl -O https://aiskillstore.io/v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=ClaudeCodeAgentSkill
2
Unzip it into the Claude Code skills directory.
unzip cron-explainer-agent-skill-*.skill -d ~/.claude/skills/cron-explainer/
3
Restart Claude Code — the skill is auto-loaded at session start. No slash command needed.
1
Download the Cursor-converted package.
curl -O https://aiskillstore.io/v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=Cursor
2
Unzip and place it in a permanent location.
unzip cron-explainer-cursor-*.skill -d ~/.cursor/skills/cron-explainer/
3
Add the MCP server config to .cursor/mcp.json, then restart Cursor.
cat ~/.cursor/skills/cron-explainer/cursor_mcp_config.json
1
Download the Gemini CLI-converted package.
curl -O https://aiskillstore.io/v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=GeminiCLI
2
Unzip and place it in a permanent location.
unzip cron-explainer-geminicli-*.skill -d ~/.gemini/skills/cron-explainer/
3
Add the MCP server config to ~/.gemini/settings.json, then restart Gemini CLI.
cat ~/.gemini/skills/cron-explainer/gemini_settings_snippet.json
1
Download the Codex CLI-converted package.
curl -O https://aiskillstore.io/v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download?platform=CodexCLI
2
Unzip and place it in a permanent location.
unzip cron-explainer-codexcli-*.skill -d ~/.codex/skills/cron-explainer/
3
Add the MCP server config to ~/.codex/config.toml, then restart Codex CLI.
cat ~/.codex/skills/cron-explainer/codex_config_snippet.toml
1
Download the skill package via REST API.
GET https://aiskillstore.io/v1/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/download
2
Place it in your agent platform's skills directory.
cp cron-explainer.skill ./skills/
3
Fetch platform-specific details via the Install Guide API.
GET https://aiskillstore.io/v1/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/install-guide?platform=CustomAgent

Security Vetting Report

Vetting Result APPROVED

Findings: ["메타데이터 경고: 권장 필드 없음: 'requirements' (SKILL.md v2 권장)", "메타데이터 경고: 권장 필드 없음: 'changelog' (SKILL.md v2 권장)"]

✅ No security risks found.

AI Review Stage

Reviewer gemini Risk Level 🟢 Low Review Summary Cron 표현식 분석, 다음 실행 시각 계산 및 안티패턴 감사를 수행하는 안전하고 독립적인 스킬입니다.
Reasoning

스킬 메타데이터와 코드 파일을 종합적으로 검토한 결과, 다음과 같은 판단 근거로 'approved' 및 'low' 위험 수준으로 평가합니다. 1. **Permissions 일치**: 메타데이터에 선언된 `network: false`, `filesystem: false`, `subprocess: false` 권한과 실제 코드의 동작이 완벽하게 일치합니다. 외부 네트워크 통신, 파일 시스템 접근(표준 입출력 제외), 외부 프로세스 실행 시도가 전혀 발견되지 않았습니다. 2. **악의적 코드 부재**: 코드에서 데이터 탈취, 시스템 파괴, 또는 기타 악의적인 목적을 가진 코드는 발견되지 않았습니다. 코드는 명확하고 난독화되어 있지 않으며, 스킬의 명시된 기능(cron 표현식 설명, 실행 시각 계산, 감사)만을 수행합니다. 3. **외부 통신 없음**: `requests`, `urllib`, `socket` 등 외부 통신을 위한 라이브러리나 모듈 사용이 없으며, `zoneinfo` 모듈은 Python 3.9+ 표준 라이브러리이므로 외부 통신으로 간주하지 않습니다. 4. **사용자 데이터 처리**: 스킬은 cron 표현식, 타임존, 언어 등 기능 수행에 필요한 최소한의 입력만을 받으며, 개인 식별 정보(PII)나 민감한 사용자 데이터를 수집하거나 전송하지 않습니다. 출력 데이터 또한 입력된 cron 표현식에 대한 분석 결과입니다. 5. **코드 품질 및 목적 일치**: 코드는 `main.py`를 통해 각 기능(파싱, 설명, 스케줄링, 감사)을 모듈화하여 호출하는 구조로 잘 정리되어 있습니다. 입력 유효성 검사(타입, 길이, 범위)가 `main.py`에서 이루어지고, 오류 처리 로직도 구현되어 있어 견고합니다. 'zero external dependencies'라는 설명처럼 Python 표준 라이브러리만을 사용하여 구현되어 있어 신뢰성이 높습니다. 스킬의 목적과 코드의 구현이 정확히 일치하며, 높은 품질을 보여줍니다. 정적 분석 결과 또한 'approved' 상태로, 레드 플래그, 난독화 경고, 금지된 실행 파일이 발견되지 않았음을 확인했습니다. 전반적으로 안전하고 신뢰할 수 있는 스킬로 판단됩니다.

Version History

Version USK v3 Vetting Status Packaged At Downloads Changelog
v1.0.0 approved 2026-04-29 ⬇ 1
v1.0.0 approved 2026-04-29 ⬇ 0

Examples 7

Representative input/output examples for this skill. Agents can use these to understand how to invoke the skill and what output to expect.

explain_basic
# explain# basic# daily

Explain a simple daily cron expression (English + Korean). / 간단한 일일 cron 설명.

📥 Input
{
  "action": "explain",
  "expression": "0 2 * * *",
  "timezone": "Asia/Seoul"
}
📤 Output
{
  "field_breakdown": {
    "dom": {
      "en": "every day",
      "ko": "\ub9e4\uc77c",
      "raw": "*"
    },
    "dow": {
      "en": "every day of the week",
      "ko": "\ub9e4 \uc694\uc77c",
      "raw": "*"
    },
    "hour": {
      "en": "at 02:00",
      "ko": "2\uc2dc \uc815\uac01",
      "raw": "2"
    },
    "minute": {
      "en": "at minute 0",
      "ko": "0\ubd84",
      "raw": "0"
    },
    "month": {
      "en": "every month",
      "ko": "\ub9e4\uc6d4",
      "raw": "*"
    }
  },
  "human_en": "at 02:00, every day",
  "human_ko": "\ub9e4\uc77c 2\uc2dc 00\ubd84\uc5d0 \uc2e4\ud589",
  "timezone": "Asia/Seoul",
  "valid": true
}
explain_weekday
# explain# step# range# weekday

Business-hours job — every 30 min on weekdays. / 평일 업무시간 30분마다.

📥 Input
{
  "action": "explain",
  "expression": "*/30 9-17 * * 1-5",
  "lang": "both",
  "timezone": "Asia/Seoul"
}
📤 Output
{
  "human_en": "every 30 minute(s), every hour from 09:00 to 17:00, from Monday to Friday",
  "human_ko": "\uc6d4\uc694\uc77c\ubd80\ud130 \uae08\uc694\uc77c\uae4c\uc9c0\uc5d0 9\uc2dc\ubd80\ud130 17\uc2dc\uae4c\uc9c0 \ub9e4 30\ubd84\ub9c8\ub2e4 \uc2e4\ud589",
  "timezone": "Asia/Seoul",
  "valid": true
}
next_runs_basic
# next_runs# hourly

Get next 3 run times for an hourly job. / 매시간 작업의 다음 실행 시각 3개.

📥 Input
{
  "action": "next_runs",
  "count": 3,
  "expression": "0 * * * *",
  "timezone": "Asia/Seoul"
}
📤 Output
{
  "avg_interval_seconds": 3600.0,
  "expression": "0 * * * *",
  "runs": [
    {
      "human_ko": "2026\ub144 04\uc6d4 29\uc77c (\ud654) 03:00",
      "iso": "2026-04-29T03:00:00+09:00",
      "unix_ts": 1745863200
    },
    {
      "human_ko": "2026\ub144 04\uc6d4 29\uc77c (\ud654) 04:00",
      "iso": "2026-04-29T04:00:00+09:00",
      "unix_ts": 1745866800
    },
    {
      "human_ko": "2026\ub144 04\uc6d4 29\uc77c (\ud654) 05:00",
      "iso": "2026-04-29T05:00:00+09:00",
      "unix_ts": 1745870400
    }
  ],
  "timezone": "Asia/Seoul"
}
audit_spam
# audit# spam# sec

Audit a potential spam cron (* * * * *). / 스팸 가능성 있는 cron 감사.

📥 Input
{
  "action": "audit",
  "expression": "* * * * *",
  "timezone": ""
}
📤 Output
{
  "expression": "* * * * *",
  "findings": [
    {
      "code": "SEC001",
      "fix_hint": {
        "action": "change",
        "field": "minute",
        "reference": "https://crontab.guru/#*/5_*_*_*_*",
        "suggested": "*/5 * * * *  (\ub9e4 5\ubd84\ub9c8\ub2e4)"
      },
      "message": "\ub9e4 \ubd84 \uc2e4\ud589\ub429\ub2c8\ub2e4. \uc758\ub3c4\ud55c \uacbd\uc6b0\uac00 \uc544\ub2c8\ub77c\uba74 \uc11c\ubc84 \uacfc\ubd80\ud558 \uc704\ud5d8\uc774 \uc788\uc2b5\ub2c8\ub2e4.",
      "message_en": "Runs every minute. This can overload servers if unintentional.",
      "severity": "SEC"
    },
    {
      "code": "SEC002",
      "fix_hint": {
        "action": "specify",
        "field": "timezone",
        "reference": "https://en.wikipedia.org/wiki/List_of_tz_database_time_zones",
        "suggested": "Asia/Seoul"
      },
      "message": "timezone\uc774 UTC\ub85c \uc124\uc815\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4...",
      "severity": "SEC"
    }
  ],
  "summary": {
    "perf": 0,
    "sec": 2,
    "str": 1,
    "total": 3
  },
  "valid": true
}
audit_midnight_dst
# audit# dst# midnight

Audit a midnight job for DST risk. / 자정 작업의 DST 위험 감사.

📥 Input
{
  "action": "audit",
  "expression": "0 0 * * *",
  "timezone": "America/New_York"
}
📤 Output
{
  "expression": "0 0 * * *",
  "findings": [
    {
      "code": "STR004",
      "fix_hint": {
        "action": "change",
        "field": "hour",
        "reference": "https://en.wikipedia.org/wiki/Daylight_saving_time",
        "suggested": "0 0 \u2192 1 0 (01:00) \ub85c \ubcc0\uacbd\ud558\uac70\ub098 \uba85\uc2dc\uc801 timezone \uc124\uc815"
      },
      "message": "\uc790\uc815(00:00) \uc2e4\ud589\uc740 DST(\uc77c\uad11 \uc808\uc57d \uc2dc\uac04) \uc804\ud658 \uc2dc \uac74\ub108\ub6f0\uac70\ub098 \ub450 \ubc88 \uc2e4\ud589\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.",
      "severity": "STR"
    }
  ],
  "summary": {
    "perf": 0,
    "sec": 0,
    "str": 2,
    "total": 2
  },
  "valid": true
}
explain_complex
# explain# complex# comma

Complex expression with multiple comma-separated values. / 복잡한 다중 값 표현식 설명.

📥 Input
{
  "action": "explain",
  "expression": "0,30 8,12,18 1,15 * MON-FRI",
  "lang": "both",
  "timezone": "UTC"
}
📤 Output
{
  "human_en": "at minutes 0, 30, at 08:00, 12:00, 18:00, on days 1st, 15th, from Monday to Friday",
  "human_ko": "\ub9e4\uc6d4 1\uc77c, 15\uc77c\uc5d0 \uc6d4\uc694\uc77c\ubd80\ud130 \uae08\uc694\uc77c\uae4c\uc9c0\uc5d0 8\uc2dc, 12\uc2dc, 18\uc2dc 0, 30\ubd84\uc5d0 \uc2e4\ud589",
  "timezone": "UTC",
  "valid": true
}
error_invalid_expression
# error# validation

Invalid cron expression returns structured error. / 잘못된 표현식 오류 응답.

📥 Input
{
  "action": "explain",
  "expression": "99 25 * * *"
}
📤 Output
{
  "error": "Value 99 out of range [0,59] for field \u0027minute\u0027",
  "field_breakdown": null,
  "human_en": null,
  "human_ko": null,
  "timezone": "UTC",
  "valid": false
}

All examples are also available via the agent API: /v1/agent/skills/3f8574d6-36b4-42d4-ba22-f2d8f08b9a6f/schema

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