Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/khalilbenaz/claude-skills-collectionnpx agentmods add skills/khalilbenaz/claude-skills-collection/cron-job-designerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/khalilbenaz/claude-skills-collection/cron-job-designer)<a href="https://agentmods.dev/skills/khalilbenaz/claude-skills-collection/cron-job-designer"><img src="https://agentmods.dev/badge/skills/khalilbenaz/claude-skills-collection/cron-job-designer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/khalilbenaz/claude-skills-collection/cron-job-designer"><img src="https://agentmods.dev/badge/skills/khalilbenaz/claude-skills-collection/cron-job-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00069 | $0.02070 |
| Opus 5 | $0.00034 | $0.01035 |
| Sonnet 5 | $0.00014 | $0.00414 |
| Haiku 4.5 | $0.00007 | $0.00207 |
Grade A, and why
cron-job-designer scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -fsS --retry 3 https://hc-ping.com/UUID > /dev/null How it starts
The opening of the file, as written. The whole thing — 208 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cron Job Designer
Workflow
1. Qualifier le besoin
Avant d'écrire une expression cron, réponds à ces questions :
| Question | Impact |
|---|---|
| Fenêtre d'exécution stricte (ex. avant 6h) ? | Timeout max à fixer |
| Idempotent par nature ou à construire ? | Stratégie de verrou |
| Exécution multi-instances (k8s, cloud) ? | Leader election |
| Dépendance externe (API, DB, SFTP) ? | Circuit breaker + retry |
| Fréquence < 1 min ? | Cron inadapté → message queue |
2. Concevoir l'expression cron
Syntaxe standard (5 champs) :
┌── minute (0-59)
│ ┌── heure (0-23)
│ │ ┌── jour du mois (1-31)
│ │ │ ┌── mois (1-12)
│ │ │ │ ┌── jour de la semaine (0-6, 0=dim)
│ │ │ │ │
* * * * *
Exemples copiables :
# Tous les jours à 2h07 (décalé pour éviter 2h00)
7 2 * * *
# Toutes les 15 min en heures ouvrables (8h-18h, lun-ven)
*/15 8-18 * * 1-5
# Premier lundi du mois à 3h30
30 3 * * 1 [ $(date +\%d) -le 7 ] && /path/to/script.sh
# Alternative avec Quartz/Hangfire : "0 30 3 ? * 2#1"
# Dernier jour du mois à minuit (approximation)
55 23 28-31 * * [ $(date +\%d) -eq $(cal | awk 'NF{last=$NF} END{print last}') ]
# Chaque heure, décalé de 17 min
17 * * * *
Valideur en ligne : crontab.guru — toujours vérifier avant déploiement.
Syntaxes étendues (systemd, cloud) :
# systemd timer — OnCalendar
OnCalendar=Mon *-*-* 03:17:00
# AWS EventBridge (rate)
rate(1 hour)
# AWS EventBridge (cron, timezone UTC)
cron(17 2 * * ? *)
# Kubernetes CronJob
schedule: "17 2 * * *"
3. Choisir l'outil adapté
| Contexte | Outil recommandé | Remarque |
|---|---|---|
| Linux standalone | cron / systemd timer |
systemd > cron : logs journald, retry natif |
| .NET / ASP.NET Core | Hangfire ou Quartz.NET | Hangfire = dashboard UI intégré |
| Java / Spring | Quartz ou @Scheduled |
Quartz pour clustering |
| Node.js | node-cron ou Bull | Bull si queue nécessaire |
| Python | Celery Beat ou APScheduler | APScheduler pour scripts simples |
| Kubernetes | CronJob k8s | concurrencyPolicy: Forbid par défaut |
| Azure | Azure Functions Timer ou Logic Apps | Timer Trigger = NCRONTAB (6 champs) |
| AWS | EventBridge Scheduler | Remplace CloudWatch Events |
| GCP | Cloud Scheduler | HTTP target ou Pub/Sub |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 208 lines · 69 tokens per session scan A 82afec20bd5c
cron-job-designer is a skill published in the GitHub repository khalilbenaz/claude-skills-collection (22 stars, last pushed 19d ago), licensed MIT. It adds 69 tokens to every session and 2,070 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
csharp-patterns
C#/.NET: LINQ, async/await, DI, records, nullable refs, ASP.NET Core, EF Core, MediatR. Triggers: C#, .NET, dotnet, ASP.NET, EF Core, LINQ, record type, IServiceCollection.
seo-validate
SEO validator: meta/OG, Schema.org, hreflang, Core Web Vitals, crawlability. Triggers: SEO, meta tags, Schema.org, hreflang, LCP, INP, CLS, Core Web Vitals, sitemap, crawlability.
swift-patterns
Swift/iOS: SwiftUI, Combine, async/await, actors, SPM, Core Data, UIKit interop. Triggers: Swift, SwiftUI, Combine, iOS, Xcode, actor, Core Data, @MainActor, @State.
ruby-patterns
Ruby/Rails: blocks, metaprogramming, ActiveRecord, Sidekiq, RSpec, Sorbet, Hanami. Triggers: Ruby, Rails, ActiveRecord, Sidekiq, RSpec, Gemfile, bundler, Hanami, Sorbet.
pr
Creates GitHub PR after pre-flight checks (lint/typecheck/tests), structured summary from commits. Triggers: pr, pull request, create PR, ready to merge.
research-mastery
Hierarchical retrieval: KB → MCP/Context7 → web. Triggers: research, fact-check, verify, synthesize, cross-reference, multi-source, cite sources.