The self-improving agent from Nous Research (248k+ stars). Its learning loop has five mechanisms: periodic memory nudges, autonomous skill creation after tasks, skills that self-improve in use, FTS5 session search with LLM summarization, and Honcho user modeling. One TUI, seven terminal backends (local/Docker/SSH/Singularity/Modal/Daytona/Vercel Sandbox), six chat platforms from a single gateway, no model lock-in. It doubles as a trajectory data-production apparatus. Self-improvement is falsifiable and we have not run a controlled experiment, so we grade it as needing reproduction.