subagent SKILL.md skillA
subagent 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/subagent@git:20260910.c6398a7Pins git:20260910.c6398a7 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
assistant/src/config/bundled-skills/subagent/SKILL.md- Versions recorded
- 6
- Latest version
- git:20260910.c6398a7, committed Sep 10, 2026
- First version recorded
- Jul 16, 2026
- Size
- 14,888 bytes
- Repository stars
- 1,467
- License
- MIT
Spawn and manage autonomous background agents for parallel work.
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
Subagent orchestration -- spawn background agents to work on tasks in parallel. ## Lifecycle Subagents follow this status flow: `pending` -> `running` -> `completed` / `failed` / `aborted` - **Spawn**: Use `subagent_spawn` with a label, objective, and type. The subagent runs autonomously. - **Mid-run communication**: Subagents can send notifications to the parent via `notify_parent` while still running -- useful for sharing interim findings or signaling that they are blocked. - **Auto-notification**: The parent conversation is automatically notified when a subagent reaches a terminal status (completed/failed/aborted). Do NOT poll `subagent_status`. - **Read output**: Use `subagent_read` after the subagent reaches a terminal status to retrieve its full output. ## Types There are three subagent types. Every one of them runs in the background: the spawn call returns straight away with an id, and the result reaches you as a notification. Pick one with two questions: **does it need to change anything**, and **what do you want back**? …
Read the whole file at its exact version.
How to install
mdr add vellum-ai/vellum-assistant/subagent@sha256:099293c722a13d35The line at the top of this page pins the label git:20260910.c6398a7, 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_vh7j3jevvgwpmsvu)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 6 versions of this file, between Jul 16, 2026 and Sep 10, 2026, about one every 11 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260910.c6398a7 latest | 2026-09-10 | c6398a7 | 14,888 B | A | view · diff |
| git:20260817.bf8c7d7 | 2026-08-17 | bf8c7d7 | 14,189 B | A | view · diff |
| git:20260805.1e67908 | 2026-08-05 | 1e67908 | 13,638 B | A | view · diff |
| git:20260804.a417619 | 2026-08-04 | a417619 | 13,817 B | A | view · diff |
| git:20260731.08d59ec | 2026-07-31 | 08d59ec | 10,188 B | A | view · diff |
| git:20260716.72d9679 | 2026-07-16 | 72d9679 | 9,642 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 (14888 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 · 1,467 stars · license MIT · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vh7j3jevvgwpmsvu GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/subagent GET https://markdownregistry.com/api/v1/blob/099293c722a13d35f99bb92b03ff73acdd7e7ac3c3e5e6d7c28b48aa3cc18099
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.
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