Hermes Agent Review: Self-Improving Open-Source AI Agent

8.1 / 10 Learning Loop 9.5 Memory System 9.0 Developer Experience 8.0 Ecosystem 7.5 Stability 6.5 What Is Hermes Agent? Hermes Agent is Nous Research's open-source AI agent framework, released February 25, 2026. In the seven weeks following its debut, it accumulated 95,600 GitHub stars, making it the fastest-growing agent framework of 2026. The framework is built around a single idea that most agent tools have ignored: an agent should get better at your specific workflow over time , not just exe