vellum-heartbeat SKILL.md skillA
vellum-heartbeat from vellum-ai/vellum-assistant is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add vellum-ai/vellum-assistant/vellum-heartbeat@git:20260908.f52f15ePins git:20260908.f52f15e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- vellum-ai/vellum-assistant
- Path
skills/vellum-heartbeat/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260908.f52f15e, committed Sep 8, 2026
- First version recorded
- Apr 22, 2026
- Size
- 2,054 bytes
- Repository stars
- 1,483
- License
- MIT
Configure periodic background checklist runs.
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
The heartbeat feature runs your `HEARTBEAT.md` checklist periodically in a background conversation. Each run, the assistant works through the checklist and flags anything that needs attention.
## Setup
Edit `config.json` using `file_edit`:
1. **Enable heartbeat**: Set `heartbeat.enabled` to `true`.
2. **Set interval**: Set `heartbeat.intervalMs` (milliseconds between runs, default: 3600000 = 1 hour).
3. **Optional active hours**: Set `heartbeat.activeHoursStart` and `heartbeat.activeHoursEnd` (0-23) to restrict runs to certain hours in the heartbeat timezone. Hours use `heartbeat.timezone` when set, otherwise the user's configured or detected timezone (the host clock is last resort). Both must be set together.
Example config.json heartbeat section:
```json
{
"heartbeat": {
"enabled": true,
"intervalMs": 1800000,
"activeHoursStart": 8,
"activeHoursEnd": 22
}
}
```
Then edit `HEARTBEAT.md` with the checklist items. The assistant will work through this file each heartbeat run.
## Notes
- Toggling `heartbeat.enabled` requires an assistant restart to take effect.
- Changes to `HEARTBEAT.md` take effect on the next heartbeat run (no restart needed).
…Read the whole file at its exact version.
How to install
mdr add vellum-ai/vellum-assistant/vellum-heartbeat@sha256:e55e277a44a1d0c2The line at the top of this page pins the label git:20260908.f52f15e, 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_svzajeh5gul5lbss)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Apr 22, 2026 and Sep 8, 2026, about one every 46 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260908.f52f15e latest | 2026-09-08 | f52f15e | 2,054 B | A | view · diff |
| git:20260621.3a76ab5 | 2026-06-21 | 3a76ab5 | 1,901 B | A | view · diff |
| git:20260603.ff934d9 | 2026-06-03 | ff934d9 | 1,600 B | A | view · diff |
| git:20260422.4141428 | 2026-04-22 | 4141428 | 1,577 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 (2054 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
vellum-ai/vellum-assistant · 1,483 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_svzajeh5gul5lbss GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/vellum-heartbeat GET https://markdownregistry.com/api/v1/blob/e55e277a44a1d0c2dc37c8415f3850c4d1892dade3ad72d5a6037c545ee2fd52
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.