Dertet Harness is a free, open-source AI workspace for Windows (plus Android/iOS chat clients). Bring your own key for OpenAI, Anthropic, Gemini, OpenRouter, or run a local model via Ollama/LM Studio. The built-in agent isn't just a chatbot: it edits code, runs commands, browses the web in its own tab, can control your screen, and edits video with ffmpeg. Slash commands, persistent memory, 9 languages. No subscription.
