How do I install the Crabukit skill?

Run npx skillmds@latest add modbender/crabukit in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Crabukit safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: CAUTION, Skill Scanner: PASS. Capability flags: executes scripts, makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Crabukit?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Crabukit free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Crabukit?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Crabukit by modbender — Agent Skill

Name: Crabukit
Rating: 4.666666666666667 (3 reviews)
Author: modbender

Crabukit

Security scanner for OpenClaw skills with Clawdex integration. Analyzes SKILL.md and scripts for dangerous permissions, hardcoded secrets, shell injection vulnerabilities, and malicious code patterns. Automatically uses Clawdex database if installed for known-malicious skill detection. Use when (1) installing a skill from an untrusted source, (2) developing a skill before publishing, (3) auditing installed skills, or (4) running CI/CD security checks.

modbender Updated Sep 9, 2026 12 repo stars

File contents

🔒 Crabukit

Security scanner for OpenClaw skills. Prevents installation of malicious or vulnerable skills by static analysis. Integrates with Clawdex for comprehensive protection.

Quick Start

# Safely install a skill (scans before installing)
crabukit install youtube-summarize

# Scan a local skill before installing
crabukit scan ./suspicious-skill/

# Scan an installed skill
crabukit scan /opt/homebrew/lib/node_modules/clawdbot/skills/unknown-skill

# CI mode - fail on high severity or above
crabukit scan ./my-skill --fail-on=high

# List all detection rules
crabukit list-rules

🔌 Clawdex Integration

Crabukit automatically integrates with Clawdex if installed:

# Install Clawdex for database-based protection
clawdhub install clawdex

# Now crabukit will:
# 1. Check Clawdex database (known 824+ malicious skills)
# 2. Run behavior analysis (zero-day detection)
# → Defense in depth!

Layered Protection:

Clawdex: Database of known-bad skills (fast lookup)
Crabukit: Behavior analysis for zero-days (static analysis)

What It Detects

Category	Issues
External DB	Known malicious skills (via Clawdex)
Secrets	Hardcoded API keys, private keys, passwords
Code Injection	`eval()`, `exec()`, `subprocess(shell=True)`
Shell Risks	`curl \| bash`, `rm -rf`, unquoted variables
Permissions	Dangerous tool requests without safety guidance
Metadata	Suspicious patterns in SKILL.md descriptions

Risk Scoring

Crabukit assigns a score (0-100) based on findings:

Score	Level	Action
0	Clean	Safe to install
1-9	Low	Minor issues
10-24	Medium	Review findings
25-49	High	Careful review required
50+	Critical	Do not install

Exit Codes

0 - Scan completed, no findings at or above --fail-on threshold
1 - Findings at or above threshold detected

CI/CD Integration

# .github/workflows/security.yml
- name: Scan skill
  run: |
    pip install crabukit
    crabukit scan ./my-skill --fail-on=medium

Installation

# Via ClawdHub (when published)
clawdhub install crabukit

# Or via pip
pip install crabukit

# Or from source
git clone https://github.com/tnbradley/crabukit.git
cd crabukit
pip install -e .

---name: crabukitdescription: Security scanner for OpenClaw skills with Clawdex integration. Analyzes SKILL.md and scripts for dangerous permissions, hardcoded secrets, shell injection vulnerabilities, and malicious code patterns. Automatically uses Clawdex database if installed for known-malicious skill detection. Use when (1) installing a skill from an untrusted source, (2) developing a skill before publishing, (3) auditing installed skills, or (4) running CI/CD security checks.--- # 🔒 Crabukit Security scanner for OpenClaw skills. Prevents installation of malicious or vulnerable skills by static analysis. **Integrates with Clawdex** for comprehensive protection. ## Quick Start ```bash # Safely install a skill (scans before installing) crabukit install youtube-summarize # Scan a local skill before installing crabukit scan ./suspicious-skill/ # Scan an installed skill crabukit scan /opt/homebrew/lib/node_modules/clawdbot/skills/unknown-skill # CI mode - fail on high severity or above crabukit scan ./my-skill --fail-on=high # List all detection rules crabukit list-rules ``` ## 🔌 Clawdex Integration Crabukit **automatically integrates with Clawdex** if installed: ```bash # Install Clawdex for database-based protection clawdhub install clawdex # Now crabukit will: # 1. Check Clawdex database (known 824+ malicious skills) # 2. Run behavior analysis (zero-day detection) # → Defense in depth! ``` **Layered Protection:** - **Clawdex**: Database of known-bad skills (fast lookup) - **Crabukit**: Behavior analysis for zero-days (static analysis) ## What It Detects | Category | Issues | |----------|--------| | **External DB** | Known malicious skills (via Clawdex) | | **Secrets** | Hardcoded API keys, private keys, passwords | | **Code Injection** | `eval()`, `exec()`, `subprocess(shell=True)` | | **Shell Risks** | `curl \| bash`, `rm -rf`, unquoted variables | | **Permissions** | Dangerous tool requests without safety guidance | | **Metadata** | Suspicious patterns in SKILL.md descriptions | ## Risk Scoring Crabukit assigns a score (0-100) based on findings: | Score | Level | Action | |-------|-------|--------| | 0 | Clean | Safe to install | | 1-9 | Low | Minor issues | | 10-24 | Medium | Review findings | | 25-49 | High | Careful review required | | 50+ | Critical | Do not install | ## Exit Codes - `0` - Scan completed, no findings at or above `--fail-on` threshold - `1` - Findings at or above threshold detected ## CI/CD Integration ```yaml # .github/workflows/security.yml - name: Scan skill run: | pip install crabukit crabukit scan ./my-skill --fail-on=medium ``` ## Installation ```bash # Via ClawdHub (when published) clawdhub install crabukit # Or via pip pip install crabukit # Or from source git clone https://github.com/tnbradley/crabukit.git cd crabukit pip install -e . ```

Frequently asked questions