acp skillA
acp is agent-read markdown (skill) from vellum-ai/vellum-assistant: Set up, authenticate, and run external coding agents (Claude Code, Codex) via the Agent Client Protocol.
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/acp@git:20260906.c6e2a61mdr add vellum-ai/vellum-assistant/acp@sha256:3f23e06b0301b945Pin 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_7xgedwcxixms42wl)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260906.c6e2a61 latest | 2026-09-06 | c6e2a61 | 10,198 B | A | view · diff |
| git:20260901.8c34e6d | 2026-09-01 | 8c34e6d | 9,998 B | A | view · diff |
| git:20260807.cd12932 | 2026-08-07 | cd12932 | 9,504 B | A | view · diff |
| git:20260717.2397702 | 2026-07-17 | 2397702 | 9,646 B | A | view · diff |
| git:20260630.c2cf9cc | 2026-06-30 | c2cf9cc | 8,051 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 (10198 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 · 1,194 stars · license MIT · pushed 2026-09-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7xgedwcxixms42wl GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/acp GET https://markdownregistry.com/api/v1/blob/3f23e06b0301b9456acb03a7aa81158e61094b3a663a89175ec40028bcc65a65