vellum-skills-catalog skillA
vellum-skills-catalog is agent-read markdown (skill) from vellum-ai/vellum-assistant: Discover bundled skills and search/install community skills from the skills.sh registry.
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-skills-catalog@git:20260603.ff934d9mdr add vellum-ai/vellum-assistant/vellum-skills-catalog@sha256:deaf3caa0c0ac79cPin 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_5462nbldsrih5e7m)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260603.ff934d9 latest | 2026-06-03 | ff934d9 | 3,538 B | A | view · diff |
| git:20260422.6931170 | 2026-04-22 | 6931170 | 3,515 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 (3538 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_5462nbldsrih5e7m GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/vellum-skills-catalog GET https://markdownregistry.com/api/v1/blob/deaf3caa0c0ac79cb684ecbca14123743f0b25b3924076b6dfb2f41595425b9e
Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.