Claude Code, Skill
Defensive Design
An architecture-neutral agent skill for the smallest evidence-backed protection against failures that can violate a real contract.
Compatibility: Not stated.
Grade B
Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
PERMISSION_SHELL_DECLARED
Why this grade
- PERMISSION_SHELL_DECLARED Note
Runs shell commands, and the manifest or description says so.
scripts/mutation_check.py, line 89
result = subprocess.run(command, cwd=work, capture_output=True, timeout=TIMEOUT_S, check=False)
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
scripts/mutation_check.py, line 89
result = subprocess.run(command, cwd=work, capture_output=True, timeout=TIMEOUT_S, check=False)
evals/defensive-design.prompts.csv, line 47
test-30,true,"Fix command injection: subprocess.run(f'convert {upload_name} {output_name}', shell=True, check=True)."
Install and update
Pass
No install-time script found, and dependencies are pinned or absent.
Network
Pass
No network call found.
Secrets
Pass
No read of a credential file or secret environment variable found.
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.
Note
Hygiene check of commit 97e64799eea9. requests shell access. The manifest names this permission.
Date and source
Date checked:
github.com
Commit graded: 97e64799eea98f580025147ec660484dd3bf3b98
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