nemo-guardrails

Enforce runtime safety policies on LLM applications with Colang 2.0 flows.

Updated May 4, 2026
One-click install
npx skills add https://github.com/Supporter09/Face_Anti_Spoofing_Biometric --skill nemo-guardrails-supporter09
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: nemo-guardrails
Source: https://github.com/Supporter09/Face_Anti_Spoofing_Biometric/tree/main/.claude/skills/nemo-guardrails
Command: npx skills add https://github.com/Supporter09/Face_Anti_Spoofing_Biometric --skill nemo-guardrails-supporter09

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

NeMo Guardrails helps keep LLM applications safe at runtime by blocking jailbreak attempts, filtering toxic or sensitive input, checking outputs, and enforcing policy before unsafe responses reach users.

Core Features & Use Cases

  • Programmable safety flows for input validation, output validation, fact checking, hallucination detection, PII masking, and toxicity checks.
  • Flexible integrations with custom actions, moderation models, and retrieval-based verification.
  • Useful for production chatbots, assistants, and agent systems that need consistent policy enforcement and low-latency guardrails.

Quick Start

Use the nemo-guardrails skill to add runtime safety checks to your LLM application and define the input and output policies you want enforced.

Frequently Asked Questions about nemo-guardrails

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

FAQPage Schema
How do I add runtime safety rails to my LLM application to block jailbreaks?

Runtime safety rails block jailbreaks by validating LLM inputs and enforcing policies before responses reach users. NeMo Guardrails provides programmable flows for input validation, toxicity checks, and policy enforcement to protect production chatbots and assistants.

What is the best way to filter PII and detect hallucinations in production chatbots?

Filtering PII and detecting hallucinations in production chatbots requires configurable runtime checks. This skill applies programmable safety flows for PII masking, fact checking, and output validation to prevent sensitive data leaks and inaccurate responses.

Can I use Colang 2.0 flows to enforce custom moderation policies for LLM assistants?

Colang 2.0 flows enforce custom moderation policies for LLM assistants by defining programmable input and output validation rules. The skill supports custom actions, moderation model integrations, and retrieval-based verification for consistent policy enforcement.

How do I configure input and output validation for an agent workflow requiring LLM safety?

Configuring input and output validation for agent workflows requires defining safety policies that intercept unsafe prompts and responses. NeMo Guardrails enables low-latency checks for toxic inputs, jailbreak attempts, and unsafe outputs within production agent systems.

Does NeMo Guardrails work with custom actions and retrieval-based fact checking?

NeMo Guardrails works with custom actions and retrieval-based fact checking to verify LLM outputs. It supports flexible integrations with moderation models and programmable safety flows, enabling hallucination detection and fact verification before responses reach users.

When do I need runtime moderation for an LLM assistant versus basic prompt engineering?

Runtime moderation is needed for LLM assistants when basic prompt engineering cannot guarantee consistent policy enforcement. Configurable guardrails provide low-latency input validation, PII masking, and toxicity checks required for production environments handling unpredictable user inputs.