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DeepSeek Harness is an open-source coding agent.
DeepSeek Harness is currently a developer preview. Its upstream configuration may change between releases.

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Setup

Ollama installs @deepseek-ai/dsh if needed. To choose a model:
To configure without starting:
Web search is enabled automatically. It requires Ollama cloud access and a model that supports tools. Run ollama signin if needed.

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Configuration

Ollama stores its settings in ~/.ollama/launch/dsh/settings.yaml. These settings load last and set the model, provider, and web search connection. Repeated launches preserve other settings in this file. Ollama does not change ~/.dsh/settings.yaml, profiles, sessions, or credentials. Launch rejects additional --patch arguments. Pass other Harness arguments after --:

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Manual install

DeepSeek Harness requires Node.js. To install it manually:
Then run ollama launch dsh. On Windows, install Node.js for Windows.