Since the 4.2.0 release , Helidon provides a very handy integration with LangChain4j, a popular Java library for abstraction over various AI clients from different providers. LangChain4j brings great power in leveraging AI in your Helidon applications, and as the famous saying states: “With great power comes great responsibility!” How can we handle AI usage responsibly then? LangChain4j Guardrails LangChain4j guardrails are a safety and reliability layer built on top of LangChain4j to help you constrain and validate how your LLMs are used in your Java applications.