cron-explainer SKILL.md skillA
cron-explainer from zhuyansen/agent-skills-hub is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add zhuyansen/agent-skills-hub/cron-explainer@git:20261010.859e8f6Pins git:20261010.859e8f6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- zhuyansen/agent-skills-hub
- Path
ops/skillmgr-runs/in/input/library/cron-explainer/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261010.859e8f6, committed Oct 10, 2026
- Size
- 717 bytes
- Repository stars
- 461
- License
- MIT
Explain a cron expression in words and list its next five run times.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Cron Explainer Explain a cron expression in words and list its next five run times. ## When to use Use this skill when the user asks for it by name or describes this task. Do not use it for unrelated work. ## Steps 1. Read the input the user points to. If none is given, ask for the file or text. 2. Do the task described above, step by step, and keep the user's own wording where it matters. 3. Show the result, then a short list of what you changed or found, so the user can check it. ## Notes - Keep changes small and reversible. - Say plainly when the input is incomplete instead of guessing.
Read the whole file at its exact version.
How to install
mdr add zhuyansen/agent-skills-hub/cron-explainer@sha256:d5c7dda585e76097The line at the top of this page pins the label git:20261010.859e8f6, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_yc3e5eolgivpe365)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 10, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (717 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
zhuyansen/agent-skills-hub · 461 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yc3e5eolgivpe365 GET https://markdownregistry.com/api/v1/resolve?ref=zhuyansen/agent-skills-hub/cron-explainer GET https://markdownregistry.com/api/v1/blob/d5c7dda585e7609795aeaa831d9a82f5759d8e4d40678634899776c16fd514b7
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.