Grades are a hygiene check, not a security guarantee.

Claude Code, Skill

Skill Validator

Validate Skill content against Agent Skill specification, with additional content density and quality checks.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

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

Rescanned at commit 899dba96e0d0.

NETWORK_UNNAMED_HOST SECRETS_PATH_DOTENV PERMISSION_SHELL_DECLARED SECRETS_ENV_READ

Why this grade

  • NETWORK_UNNAMED_HOST Low

    Calls a fixed host that the description does not name.

    links/extract_test.go, line 59 body := "`curl https://example.com/docs` and https://example.com/real"

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    testdata/broken-frontmatter/SKILL.md, line 26 Consider using a `.env` file for local development.

  • PERMISSION_SHELL_DECLARED Note

    Runs shell commands, and the manifest or description says so.

    cmd/compact_integration_test.go, line 13 cmd := exec.Command(bin, "check", "-o", "compact", fixture(t, "valid-skill"))

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    cmd/score_evaluate.go, line 199 key := os.Getenv("ANTHROPIC_API_KEY")

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

    Note

    requests shell access. The manifest names this permission.

    PERMISSION_SHELL_DECLARED

    cmd/compact_integration_test.go, line 13

    cmd := exec.Command(bin, "check", "-o", "compact", fixture(t, "valid-skill"))

    cmd/compact_integration_test.go, line 29

    cmd := exec.Command(bin, "check", "-o", "compact", fixture(t, "warnings-only-skill"))

    cmd/compact_integration_test.go, line 48

    cmd := exec.Command(bin, "check", "-o", "compact", fixture(t, "invalid-skill"))

    Show more

    cmd/compact_integration_test.go, line 61

    cmd := exec.Command(bin, "check", fixture(t, "warnings-only-skill"))

    cmd/exitcode_integration_test.go, line 20

    cmd := exec.Command("go", "build", "-o", bin, "./cmd/skill-validator")

    cmd/exitcode_integration_test.go, line 99

    cmd := exec.Command(bin, tt.args...)

    cmd/exitcode_integration_test.go, line 200

    cmd := exec.Command(bin, tt.args...)

    cmd/exitcode_integration_test.go, line 227

    cmd := exec.Command(bin, args...)

  • Install and update

    Pass

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

  • Network

    Concern

    can reach example.com. The description does not name that host.

    NETWORK_UNNAMED_HOST

    links/extract_test.go, line 59

    body := "`curl https://example.com/docs` and https://example.com/real"

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    cmd/score_evaluate.go, line 199

    key := os.Getenv("ANTHROPIC_API_KEY")

    cmd/score_evaluate.go, line 205

    key := os.Getenv("OPENAI_API_KEY")

    testdata/broken-frontmatter/SKILL.md, line 26

    Consider using a `.env` file for local development.

    Show more

    evaluate/example_test.go, line 18

    APIKey: os.Getenv("ANTHROPIC_API_KEY"),

    evaluate/example_test.go, line 55

    APIKey: os.Getenv("OPENAI_API_KEY"),

    judge/example_test.go, line 60

    APIKey: os.Getenv("ANTHROPIC_API_KEY"),

    judge/example_test.go, line 84

    APIKey: os.Getenv("ANTHROPIC_API_KEY"),

    testdata/rich-skill/SKILL.md, line 40

    Set the following environment variables. You may consider using a `.env` file.

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • 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 899dba96e0d0. requests shell access. The manifest names this permission. can reach example.com. The description does not name that host. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: 899dba96e0d0d7d964308ac4df9657c68f581347

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