cron-scheduler SKILL.md skillA
cron-scheduler from garrytan/gbrain is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add garrytan/gbrain/cron-scheduler@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- garrytan/gbrain
- Path
skills/cron-scheduler/SKILL.md- Versions recorded
- 9
- Latest version
- v1.0.0, committed Nov 6, 2026
- First version recorded
- Apr 15, 2026
- Size
- 10,858 bytes
- Repository stars
- 31,587
- License
- MIT
Schedule management with staggering, quiet hours, and wake-up override. Validates schedules, prevents collisions, and gates delivery during quiet hours.
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 Scheduler
> **Convention:** See `skills/conventions/test-before-bulk.md` — test every cron job on 3-5 items first.
## Contract
This skill guarantees:
- Schedule staggering: max 1 job per 5-minute slot, no collisions
- Quiet hours gating: timezone-aware, with user-awake override
- Thin job prompts: jobs say "Read skills/X/SKILL.md and run it" (no inline 3000-word prompts)
- Idempotency: jobs can run twice without duplicate side effects
- Results saved as reports: `reports/{job-name}/{YYYY-MM-DD-HHMM}.md`
- One entry point: every job, workspace script and hook calls gbrain through
one wrapper that sets `GBRAIN_HOME` and keeps stderr and the exit code
([the wrapper](https://github.com/garrytan/gbrain/blob/master/docs/guides/cron-schedule.md#calling-gbrain-unattended))
## Phases
1. **Define job.** Name, schedule (cron expression), skill to run, timeout.
2. **Validate schedule.** Check no collision with existing jobs (5-minute offset rule).
- Slots: :05, :10, :15, :20, :25, :30, :35, :40, :45, :50
- If collision detected, suggest the next available slot
3. **Check quiet hours.** Default: 11 PM - 8 AM local time.
…Read the whole file at its exact version.
How to install
mdr add garrytan/gbrain/cron-scheduler@sha256:0f5c3148ca419efeThe line at the top of this page pins the label v1.0.0, 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_guc37hmvulhm3p3a)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 9 versions of this file, between Apr 15, 2026 and Nov 6, 2026, about one every 26 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-11-06 | c7ff976 | 10,858 B | A | view · diff |
| v1.0.0 | 2026-10-24 | 579b6a7 | 10,743 B | A | view · diff |
| v1.0.0 | 2026-10-24 | 4b26a98 | 10,395 B | A | view · diff |
| v1.0.0 | 2026-10-16 | 7e11d1e | 7,345 B | A | view · diff |
| v1.0.0 | 2026-10-10 | 74af2eb | 7,215 B | A | view · diff |
| v1.0.0 | 2026-10-07 | 06eecb7 | 7,062 B | A | view · diff |
| v1.0.0 | 2026-05-27 | 543f9a7 | 4,180 B | A | view · diff |
| v1.0.0 | 2026-04-18 | d861336 | 2,750 B | A | view · diff |
| v1.0.0 | 2026-04-15 | e5a9f01 | 2,349 B | A | view |
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 (10858 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
garrytan/gbrain · 31,587 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_guc37hmvulhm3p3a GET https://markdownregistry.com/api/v1/resolve?ref=garrytan/gbrain/cron-scheduler GET https://markdownregistry.com/api/v1/blob/0f5c3148ca419efe6c3e3c781e3bac4e107732b9bf7d55c05c2385686acfa7fd
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.