DeepSeek Harness v0.1 Open-Source Runtime Released

DeepSeek released DeepSeek Harness v0.1, an MIT-licensed open-source execution runtime for building autonomous AI agents. Built on the Cordis meta-framework, it treats models, tools, sessions, sandboxes, and UI as swappable plugins. Four baseline modes, Standard, Code, Minimal, and Creator, ship with an append-only session log for replay and inspection.