Troubleshoot agent hallucinating product features not in knowledge base

• Verify retrieval returns chunks before answer generation with citation requirement • System prompt instructs answer only from retrieved context or explicit uncertainty • Block speculative language for product specs via output guardrails • Evaluate retrieval recall — missing docs cause hallucination fill-in • Human feedback loop flagging incorrect answers to content team • Temperature and model settings conservative for factual domains • A/B test grounded vs ungrounded in staging with golden questions