invisible-ctrl skillA
invisible-ctrl is agent-read markdown (skill) from bruc3van/agent-skills-guard: Rule matrix security fixture for invisible-ctrl used by security rule matrix integration tests; not intended for production deployment..
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 bruc3van/agent-skills-guard/invisible-ctrl@git:20260608.9f59278mdr add bruc3van/agent-skills-guard/invisible-ctrl@sha256:390a1f57e4d4bab5Pin 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_f7tjjpoq7rghzmfi)
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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 (215 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
bruc3van/agent-skills-guard · 388 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f7tjjpoq7rghzmfi GET https://markdownregistry.com/api/v1/resolve?ref=bruc3van/agent-skills-guard/invisible-ctrl GET https://markdownregistry.com/api/v1/blob/390a1f57e4d4bab5348675620a027603264571b2d2cacac3c783c5a7bb4c1c9c
Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.