model-armor-hook

name	model-armor-hook
description	Google Cloud Model Armor hook for OpenClaw — sanitizes LLM inputs and outputs against prompt injection, PII leakage, harmful content, and malicious URLs. Install as a hook (not a skill) via: git clone into ~/.openclaw/hooks/model-armor/
metadata	{"openclaw":{"tags":"security,google-cloud,model-armor,llm-safety,prompt-injection,hook","install":[{"id":"git","kind":"git","url":"https://github.com/miticojo/openclaw-hook-model-armor","path":"~/.openclaw/hooks/model-armor","label":"Clone into hooks directory"}]}}

🛡️ Model Armor Hook

OpenClaw hook that integrates Google Cloud Model Armor for real-time sanitization of LLM inputs and outputs.

Note: This is a hook, not a skill. Install it in ~/.openclaw/hooks/model-armor/, not in the skills directory.

Installation

git clone https://github.com/miticojo/openclaw-hook-model-armor.git \
  ~/.openclaw/hooks/model-armor
openclaw hooks enable model-armor

What It Does

Intercepts message:received and message:sent events and sends content to Model Armor for analysis:

• Responsible AI — hate speech, harassment, sexually explicit, dangerous content
• Sensitive Data Protection — PII, credentials, API keys
• Prompt Injection & Jailbreak — injection attacks, jailbreak attempts
• Malicious URIs — phishing links, malware URLs
• CSAM — child safety violations (always on)

Modes

• inspect (default) — log warnings, allow message through
• block — clear content, push warning to user

Requirements

• Google Cloud project with Model Armor API enabled
• Model Armor template created in GCP Console
• Auth: SA JSON key or gcloud CLI

Configuration

export MODEL_ARMOR_PROJECT="your-project-id"
export MODEL_ARMOR_TEMPLATE="your-template-id"
export MODEL_ARMOR_LOCATION="europe-west4"  # or us-central1
export MODEL_ARMOR_ENFORCE="inspect"        # or "block"

Key Features

• 🔒 Fail-open design — API errors never block messages
• 📦 Zero npm dependencies — native fetch() + Node.js crypto
• ⚡ Token caching (55 min) + auto-chunking for long messages
• 💰 Free tier: 2M tokens/month

Full documentation: GitHub