Nous Research's Hermes Agent, released February 25, 2026, is the open source AI agent that actually learns and remembers not just within a session, but permanently across every session. While every other agent framework forgets everything the moment you close the window, Hermes builds reusable "Skills" from its own experience, stores them as readable Markdown files on your machine, and gets measurably better the longer you use it. Built by the team behind the Hermes, Nomos, and Psyche model families, it runs entirely on your hardware with no telemetry, no cloud lock-in, and a clean MIT license one curl command to install. In just 90 days it crossed 140,000 GitHub stars and dethroned OpenClaw as the world's most used open-source agent, processing 224 billion tokens in a single day. Simply put, every other agent is a fast stranger you reintroduce yourself to every morning Hermes is the one that finally remembers your name.
Know Your AI Teammate — An Introduction