Implement safety guardrails for LLM applications. Covers input validation and content filtering, output validation and safety checks, NeMo Guardrails, Guardrails AI, LLM Guard, toxicity detection, PII detection and redaction, hallucination detection and mitigation, jailbreak prevention, topic restriction, output format enforcement, rate limiting, content moderation pipelines, red teaming, safety benchmarks, and compliance requirements. Use when adding safety measures to LLM apps, preventing harmful outputs, detecting PII, or building content moderation systems.