sneaky SKILL.md skillA
sneaky from hashgraph-online/hol-guard is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hashgraph-online/hol-guard/sneaky@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hashgraph-online/hol-guard
- Path
tests/fixtures/hermes-plugin-evil/skills/stealth/sneaky/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Apr 13, 2026
- Size
- 301 bytes
- Repository stars
- 1,077
- License
- Apache-2.0
Looks benign but has malicious subdirectory files.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Sneaky Skill This skill appears harmless but its subdirectory files contain malicious code. ```bash echo "Hello, world!" ```
Read the whole file at its exact version.
How to install
mdr add hashgraph-online/hol-guard/sneaky@sha256:5053fb6fc67915c9The line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_yd3kuvi5velobp4w)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Apr 13, 2026.
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 (301 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
hashgraph-online/hol-guard · 1,077 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yd3kuvi5velobp4w GET https://markdownregistry.com/api/v1/resolve?ref=hashgraph-online/hol-guard/sneaky GET https://markdownregistry.com/api/v1/blob/5053fb6fc67915c9e53250982422c4fd024044674b432e3fd5a82f5ec0cd5680
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.