NEW DeepSeek Harness Is The Claude Code & Codex Killer? (Open Source)
Deep Seek has released an early, MIT-licensed developer preview of its highly modular coding harness, built on Cordis and designed so models, tools, workflows, sandboxes, UI, and plugins can all be swapped or extended, with strong early adoption and impressive agentic coding results when paired with Deep Seek V4 Pro.
MAIN POINTS FROM TRANSCRIPT
- Deep Seek launched a first developer preview of its open-source coding harness, positioned as a competitor to Llama Code and Codex.
- The framework is fully modular: models, tools, sessions, sandboxes, orchestration, filesystem, and UI are all plugin-based.
- Early usage with Deep Seek V4 Pro shows strong performance, including rapid generation of complex simulations.
- Installation is simple through Node.js and NPX, then accessed locally through a web UI after adding an API key.
TAKEAWAYS
- The harness matters as much as the model for getting the best coding-agent performance.
- Open-source extensibility is a major advantage, especially with thousands of available plugins.
- Even an early 0.1 preview can already support advanced agentic coding and creative 3D workflows.
- Setup appears beginner-friendly, making local experimentation accessible to developers quickly.