aig-skill-scan 0.1.4

AI Native Agent Skill security auditing tool - an LLM-driven multi-stage code audit and vulnerability review pipeline

Skill-Scan

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AI Native Agent Skill security auditing tool — an LLM-driven multi-stage code audit and vulnerability review pipeline.

skill-scan is a subproject of Tencent AI-Infra-Guard, purpose-built for static security auditing of AI Agent Skill projects (OpenClaw Skills, etc.). It runs a three-stage pipeline powered by LLM-driven deep analysis:

1. Info Collection — project structure, language, entry-point identification
2. Code Audit — parallel multi-skill auditing (data leakage, tool abuse, indirect injection, authorization bypass, etc.)
3. Vulnerability Review — deduplication, false-positive filtering, severity scoring, report generation

Vulnerability classification follows the SkillTrustBench T01–T09 taxonomy. Verdicts: malicious (clear attack intent) / suspicious (vulnerability present but no clear attack intent) / normal (benign).

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Installation

# From PyPI
pip install aig-skill-scan

# Or from source (development)
git clone https://github.com/Tencent/AI-Infra-Guard.git
cd AI-Infra-Guard/skill-scan
pip install -e .

Requires Python ≥ 3.9.

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Quick Start

Command Line

# Scan a local Skill project directory
skill-scan --repo /path/to/your/skill \
           -m deepseek/deepseek-v3.2-exp \
           -k $OPENROUTER_API_KEY \
           -u https://openrouter.ai/api/v1 \
           --language en \
           -o result.json

# Or invoke as a module
python -m skill_scan --repo /path/to/your/skill -k $OPENROUTER_API_KEY

Full options:

skill-scan --help

Option	Description	Default
--repo	Path to the Skill project directory to scan (required)	—
-m, --model	LLM model name	deepseek/deepseek-v3.2-exp
-k, --api_key	API key (falls back to env vars if omitted)	—
-u, --base_url	API base URL	https://openrouter.ai/api/v1
-p, --prompt	Custom scan prompt (optional)	—
--language	Output language: zh / en	zh
--debug	Enable debug mode	false
--aig-mode	Enable AIG integration mode (emit structured JSON to stdout for the Go backend; not needed for standalone use)	false
-o, --output	Save the scan result as a JSON file	—

--aig-mode is intended for the AI-Infra-Guard platform backend. When enabled, it writes newPlanStep/statusUpdate/toolUsed structured JSON lines to stdout. Do not enable it when using pip install standalone — it will pollute your terminal with JSON.

Programmatic Usage

import asyncio
from skill_scan.agent.agent import Agent
from skill_scan.utils.llm import LLM
from skill_scan.utils.llm_manager import LLMManager
from skill_scan.utils.aig_logger import mcpLogger

async def run():
    llm = LLM(model="deepseek/deepseek-v3.2-exp",
              api_key="sk-...",
              base_url="https://openrouter.ai/api/v1",
              context_window=128_000)
    mgr = LLMManager(api_key="sk-...", base_url="https://openrouter.ai/api/v1")
    specialized = mgr.get_specialized_llms(["thinking", "coding"])

    agent = Agent(llm=llm, specialized_llms=specialized,
                  debug=False, language="en")
    # Uncomment the next line if you need structured JSON logs (e.g. integrating into another system)
    # mcpLogger.enable()
    result = await agent.scan("/path/to/your/skill", "", "en")
    print(result)

asyncio.run(run())

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Configuration

All configuration is injected via environment variables or a .env file. skill-scan looks for .env in this order:

1. Package root (site-packages/skill_scan/.env — rarely used post-install)
2. Current working directory (./.env — recommended)

Key environment variables:

Variable	Description	Default
OPENROUTER_API_KEY / LLM_API_KEY / OPENAI_API_KEY	LLM API key	—
LLM_MODEL / OPENAI_MODEL	Default model	deepseek/deepseek-v3.2-exp
LLM_BASE_URL / OPENAI_BASE_URL	Default base URL	https://openrouter.ai/api/v1
DEFAULT_MODEL_CONTEXT_WINDOW	Main model context window	128000
THINKING_MODEL / CODING_MODEL / FAST_MODEL	Specialized models	gemini-2.5-pro / claude-sonnet-4.5 / gemini-2.0-flash-exp
LOG_LEVEL	Log level	INFO

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Architecture

skill_scan/
├── agent/              # Three-stage ScanPipeline orchestration
│   ├── agent.py        # Agent class, dispatches Info → Audit → Review
│   └── base_agent.py   # LLM loop + tool-calling base class
├── tools/              # XML-schema tool registry
│   ├── registry.py     # @register_tool decorator
│   ├── dispatcher.py   # ToolDispatcher, routes tool calls
│   ├── file/ ls/ grep/ dir/ base64_decode/ thinking/ finish/
│   └── *_schema.xml    # XML schemas consumed by the LLM
├── utils/
│   ├── llm.py          # OpenAI-compatible client
│   ├── llm_manager.py  # Multi-role LLM manager (thinking/coding/fast)
│   ├── prompt_manager.py# Prompt template loader (from skill_scan/prompt/)
│   ├── aig_logger.py   # AIG integration logger (off by default, enabled via --aig-mode)
│   ├── extract_vuln.py # <vuln> XML extraction and parsing
│   ├── project_analyzer.py # Language detection + calc_skill_score
│   └── pre_scan.py     # Pre-scan, generates project summary
├── prompt/             # Packaged prompt templates
│   ├── system_prompt.md
│   ├── compact.md  next_prompt.md  format_report.md
│   └── agents/         # Per-stage prompts
└── main.py             # CLI entry point (cli / main / parse_args)

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Scoring

calc_skill_score mirrors mcp-scan's calc_mcp_score:

Severity	Deduction
Critical	-100
High	-40
Medium	-25
Low / Info	-10

Final skill score = max(0, 100 - Σ deductions).

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Development

# Install dev dependencies
pip install -e ".[dev]"

# Lint / format
ruff check skill_scan
ruff format skill_scan

# Build locally
python -m build

# Install and test locally
pip install dist/aig_skill_scan-0.1.0-py3-none-any.whl
skill-scan --help

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License

Apache License 2.0. Any redistribution or derivative work must clearly state "Based on Tencent Zhuque Lab AI-Infra-Guard" in its documentation or UI and link to the original repository at https://github.com/Tencent/AI-Infra-Guard. See NOTICE for details.