guardrails

Implement multi-layered security guardrails for AI prompts and agents.

22|3|Updated Jan 10, 2026
One-click install
npx skills add https://github.com/fusengine/agents --skill guardrails-fusengine
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: guardrails
Source: https://github.com/fusengine/agents/tree/main/plugins/prompt-engineer/skills/guardrails
Command: npx skills add https://github.com/fusengine/agents --skill guardrails-fusengine

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses the critical need for security and quality control in AI interactions by implementing robust guardrails for prompts and agents, preventing misuse and ensuring reliable outputs.

Core Features & Use Cases

  • 4-Layer Security Architecture: Implements input, system, output, and monitoring layers for comprehensive protection.
  • Input Guardrails: Includes harmlessness screening, pattern matching for jailbreaks, and PII detection/redaction.
  • Output Guardrails: Validates format, detects hallucinations, and checks for compliance.
  • Ethical Guardrails: Provides a template for enforcing ethical and legal limits on AI behavior.
  • Use Case: Protect sensitive customer data by redacting PII from user inputs before processing, and ensure AI responses adhere to company policy by validating output format and content.

Quick Start

Apply the guardrails skill to enforce ethical and security protocols on all agent interactions.

Frequently Asked Questions about guardrails

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I secure AI agents against prompt injection and data exfiltration?

Securing AI agents against prompt injection requires a multi-layered security architecture encompassing input validation, system-level ethical constraints, output verification, and continuous monitoring to detect and block malicious patterns.

What is the best way to redact PII from user inputs before processing by an LLM?

Redacting PII from user inputs is handled by input guardrails that perform harmlessness screening and pattern matching to detect and mask sensitive customer data before the AI model processes the prompt.

How do I enforce ethical and legal compliance limits on AI behavior?

Enforcing ethical and legal compliance limits on AI behavior is achieved through ethical guardrails that provide templates for system-level constraints, ensuring AI responses adhere to company policy and legal requirements.

Can I validate AI output format and detect hallucinations automatically?

Validating AI output format and detecting hallucinations automatically is possible through output guardrails that verify structural format, check for factual hallucinations, and ensure content compliance post-generation.

Do I need pattern matching to prevent jailbreaks in my prompt engineering workflow?

Pattern matching is necessary to prevent jailbreaks in prompt engineering workflows, serving as a critical input guardrail layer to identify and block known prompt injection techniques before they reach the system.

What are the limitations of a 4-layer security architecture for agent safety?

Limitations of a 4-layer security architecture for agent safety include the ongoing need to update pattern matching rules for new jailbreak methods and the potential for false positives when validating legitimate outputs.