Why it matters

Guardrails simplify safety enforcement. Understanding shapes production.

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The architecture

Rule definitions.

Runtime enforcement.

Fallback responses.

Guardrails frameworksRulesdeclarativeRuntime enginecheck + enforceFallbacksafe responseNeMo Guardrails uses Colang DSL; Guardrails AI uses validators
Guardrails.
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How it works end to end

NeMo Guardrails: Colang DSL, LLM-based rails.

Guardrails AI: validators + retry.

LLM Guard: prompt + response checks.