Previous posts: v2 — hallucination detection + A/B testing The most common question I got after v2 was this: "The hallucination score spiked. Now what?" TraceMind told you that something broke. It didn't tell you why . And it definitely didn't help you fix it. That gap is what v3 closes. If TraceMind is useful to you, a ⭐ on GitHub helps others find it. GitHub: https://github.com/Aayush-engineer/TraceMind What's new Three things shipped in v3: EvalAgent — a ReAct agent that diagnoses quality regressions Response Control Hooks — block or retry hallucinated responses automatically Prompt Version Registry — track which prompt is deployed where The EvalAgent This is the main feature. When quality drops, instead of staring at a dashboard, you ask the agent: "Why is quality dropping on the support dataset?" Enter fullscreen mode Exit fullscreen mode The agent runs a loop: THINK → What do I need to know? ACT → Use a tool to get it OBSERVE → What did the tool show?…