Retrieval-augmented generation connects the agent to an external knowledge source containing the current internal articles. When a customer submits a question, the system retrieves relevant passages and supplies them to the model as grounding context before the response is generated. This allows the agent to answer questions about the new software release without retraining the foundation model. It is cost-effective because the knowledge index can be refreshed whenever documentation changes, keeping responses current while reducing hallucinations. Role-based and basic prompting can influence behavior or response style but cannot supply facts that the model has never received. Fine-tuning may modify model behavior, but it is more expensive, slower to update, and generally less suitable for frequently changing factual documentation. RAG therefore provides the most practical and maintainable solution.