Versioned security assessment

Report ID: SA-6C98D8E1

7/9/2026, 7:02:44 AM

skill-check security assessment v6

Skill Security Certification Report

Audit History
Audit model: codex Historical report
Skill name
skill-check
Version
v6
Maintainer
JckJhns
Source
github.com/JckJhns/skill-check/tree/main/
Coverage
22 Files scanned · 3,439 Lines analyzed
Policy version
Unavailable

Highest confirmed finding severity

High

2 confirmed security findings require attention.

Installation context

Historical evidence

This report may not describe the currently installable artifact. Open the current Skill page for install guidance.

Open current Skill page

This report does not block or authorize the manifest or ZIP.

Most static findings are false positives from Markdown examples, validation documentation, and deliberate eval fixtures. I found two semantic risks: execution of target skill scripts during Standard or Deep checks, and package installation guidance that can alter system Python. No prompt injection attempt was found in the reviewed files.

Report position

Historical report

Open audit history before using this report to install.

Audit attestation

Not attestable

The required immutable binding is incomplete.

Human verification

Not verified

No human verification is recorded for this report.

Coverage

22 Files scanned · 3,439 Lines analyzed

2 items shown for review

Limitations

This report does not claim runtime or sandbox execution and does not prove the absence of side effects.

Evidence chain

Follow the evidence from source binding to the install contract. Available evidence supports verification; it is not a safety guarantee.

  1. Source

    Binding unavailable

  2. Artifact

    Identity incomplete

  3. Audit

    Complete

  4. Install contract

    Open manifest to verify

    Open manifest

Capabilities observed

Observed means this report recorded supporting evidence. Not recorded does not prove that a capability is absent.

Contains scripts

May execute code included with the Skill.

Observed in 5 evidence locations

Network access

May connect to external services.

Observed in 1 evidence location

Filesystem access

May read or write local files.

Observed in 21 evidence locations

Env variables

May read values from the process environment.

Observed in 1 evidence location

External commands

May invoke commands or programs outside the Skill.

Observed in 36 evidence locations

Risk findings

Confirmed security concerns are separated from items that still need review.

Confirmed security concerns (2)

RISK-001 High
SKILL.md:157-159references/standard-check.md:59-75
Target Skill Script Execution During Standard Checks
Standard and Deep workflows include executing scripts from the skill being tested. This can run untrusted community code if the user selects an unsafe target skill.
The instructions explicitly include script execution with mock inputs and sample commands. Existing warnings reduce risk, but execution remains part of the default Standard path.
RISK-002 Medium
references/mock-files.md:33-53
System Python Package Installation Guidance
The mock file guidance tells agents to install packages with --break-system-packages. That can modify the host Python environment and bypass package manager safeguards.
The commands are explicit pip install examples using --break-system-packages. The packages are common, but the installation method is risky for shared environments.

Remediation

Suggested fixes recorded by this audit. Applying them is the maintainer’s responsibility.

  1. FIX-001
    High
    Standard and Deep checks execute scripts from the target skill.
    Require explicit confirmation before all script execution, recommend sandboxing, and default unknown community skills to Quick Check.
  2. FIX-002
    Medium
    Mock generation guidance uses pip install with --break-system-packages.
    Replace these commands with virtual environment guidance, dependency preflight checks, or user-approved project-local installs.
  3. FIX-003
    Low
    Skill discovery can search common personal and private skill locations.
    Ask for a path first and confirm before searching broad user skill directories or MCP filesystem roots.

Expert evidence

Immutable subject identity, scanner metadata, dismissed matches, and source-level evidence.

Artifact subject

Marketplace commit
Unavailable
Content hash
Unavailable
Tree hash
Unavailable
Skill path
Unavailable
Audit payload hash
Unavailable

Analysis metadata

Audit model: codex

Analysis state: Complete

Scope is limited to the recorded files, lines, methods, and evidence. No runtime or sandbox execution is claimed.

Verify and export

JSON report CITATION.cff SARIF 2.1.0 Signed installation manifest

The manifest and lockfile bind install artifacts to cryptographic hashes. This integrity claim is separate from the security assessment.

Audit attestation: not_attestable