DeepSeek's Cordis turns AI agents into evolvable plug-in machines

DeepSeek has open-sourced Harness and, in the same breath, released the design paper for Cordis, the underlying framework that recasts an AI agent as an "evolvable machine" — and clears a path toward recursive self-improvement. The paper explains Harness's most radical and compelling design: "Everything is a plugin." Model adapters, tool registration, session logs, and even the agent loop that drives the model to repeatedly call tools are all replaceable components. There's no fixed core sitting at the top; the agent loop itself is just another swappable plugin. The genuinely hard part isn't splitting the code into plugins...