---
name: isnad-scan-cab09200f423
description: Scan AI agent skills for security vulnerabilities — detects code injection, prompt injection, credential exfiltration, supply chain attacks, and 69+ threat patterns. Use when installing new skills, auditing existing ones, reviewing untrusted code, or validating packages before publishing.
metadata:
  openclaw:
    emoji: "🛡️"
    requires:
      bins: ["isnad-scan"]
    primaryEnv: null
    install:
      - id: isnad-scan-pip
        kind: pipx
        package: isnad-scan
        bins: ["isnad-scan"]
        label: "Install isnad-scan (pipx)"
---

# isnad-scan — Security Scanner for AI Agent Skills

Scan any skill, package, or directory for security threats before installing or running it.

## Quick Scan

```bash
isnad-scan <path>
```

Scans a directory and reports findings by severity (CRITICAL, HIGH, MEDIUM, LOW).

## Options

```bash
isnad-scan <path> --cve          # Also check dependencies for known CVEs (via OSV.dev)
isnad-scan <path> -v             # Verbose output (show matched lines)
isnad-scan <path> --json         # Machine-readable JSON output
isnad-scan <path> --cve -v       # Full audit: CVEs + verbose findings
```

## What It Detects (69+ patterns)

**Code Injection** — shell execution, eval, exec, subprocess, os.system, dynamic imports
**Prompt Injection** — role override attempts, instruction hijacking, jailbreak patterns
**Credential Exfiltration** — env var harvesting, keychain access, token theft, file reads of sensitive paths
**Network Threats** — reverse shells, DNS exfiltration, unauthorized outbound connections, webhook data leaks
**Filesystem Attacks** — path traversal, symlink attacks, /etc/passwd reads, SSH key access
**Supply Chain** — typosquatting detection, minified JS analysis, binary file scanning, hidden files
**Crypto Risks** — weak algorithms, hardcoded keys, wallet seed extraction

## When to Use

1. **Before installing a new skill** — scan the skill directory first
2. **Auditing existing skills** — periodic security review
3. **Reviewing PRs/contributions** — catch malicious code in submissions
4. **Pre-publish validation** — ensure your own skills are clean before sharing
5. **CI/CD integration** — `isnad-scan . --json` for automated checks

## Interpreting Results

```
🔴 CRITICAL  — Immediate threat. Do not install/run.
🟠 HIGH      — Likely malicious or dangerous. Review carefully.
🟡 MEDIUM    — Suspicious pattern. May be legitimate, verify intent.
🔵 LOW       — Informational. Common in legitimate code but worth noting.
```

## Examples

Scan a ClawHub skill before installing:
```bash
isnad-scan ./skills/some-new-skill/
```

Full audit with CVE checking:
```bash
isnad-scan ./skills/some-new-skill/ --cve -v
```

JSON output for automation:
```bash
isnad-scan . --json | python3 -c "import sys,json; d=json.load(sys.stdin); print(f'{d[\"summary\"][\"critical\"]} critical, {d[\"summary\"][\"high\"]} high')"
```

## Python API

```python
from isnad_scan import scan_directory

results = scan_directory("/path/to/skill")
for finding in results.findings:
    print(f"[{finding.severity}] {finding.category}: {finding.description}")
    print(f"  File: {finding.file}:{finding.line}")
```

## About ISNAD

ISNAD (إسناد) means "chain of transmission" — a method for verifying the authenticity of transmitted knowledge. isnad-scan is the security layer of the [ISNAD Protocol](https://isnad.md), bringing trust verification to the AI agent skill ecosystem.

**PyPI:** `pip install isnad-scan`
**GitHub:** [counterspec/isnad](https://github.com/counterspec/isnad)
**Protocol:** [isnad.md](https://isnad.md)


---
Source attribution: modbender
Original project: https://github.com/modbender/skill-library-mcp/blob/d9c8fe903b5b4e82237dbe8d0df8567783022e18/data/isnad-scan/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2025 skill-library-mcp contributors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: modbender
Original project: https://github.com/modbender/skill-library-mcp/blob/d9c8fe903b5b4e82237dbe8d0df8567783022e18/data/isnad-scan/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering
Roles: DevOps / SRE, QA / Test Engineer, Security Engineer
Specialties: API
Tools: Pipx
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: dda86663466c21c60d6b7d7443bbe30ad9bfd379153f458b8e65580da24da0eb