vellum-skill-authoring skillA
vellum-skill-authoring is agent-read markdown (skill) from vellum-ai/vellum-assistant: Author and review first-party Vellum skills in the repository. Use when editing files under skills/, assistant bundled skills, skill manifests, tool definitions, SKILL.md files, or first-party skill portability and isolation behavior..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
How to install
mdr add vellum-ai/vellum-assistant/vellum-skill-authoring@git:20260521.b4bdd7amdr add vellum-ai/vellum-assistant/vellum-skill-authoring@sha256:3c8e1f7f8d13544dPin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_tknsvnjkruio47xd)
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Versions
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 (1878 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 · 1,277 stars · license MIT · pushed 2026-09-17 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tknsvnjkruio47xd GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/vellum-skill-authoring GET https://markdownregistry.com/api/v1/blob/3c8e1f7f8d13544d80a11e54f789afb5a41a48aa780874b78c7dda35b93202d3
Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.