env-var-safe-shell skillA
env-var-safe-shell is agent-read markdown (skill) from bruc3van/agent-skills-guard: Rule matrix negative fixture - safe environment variable usage without piping; 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/env-var-safe-shell@git:20260609.08d2b92mdr add bruc3van/agent-skills-guard/env-var-safe-shell@sha256:a910f16a7117d13ePin 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_o3zg4x3leftxfids)
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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 (273 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_o3zg4x3leftxfids GET https://markdownregistry.com/api/v1/resolve?ref=bruc3van/agent-skills-guard/env-var-safe-shell GET https://markdownregistry.com/api/v1/blob/a910f16a7117d13eff6d27be7d63d3cc864455b5f2e082a2c98267ced978d6be
Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.