DeepSeek Harness is DeepSeek's user-facing open-source agent workspace and extensible harness, presented for everyday work, coding, research, background tasks, and plugin development. The official product page says it is in public preview worldwide. DeepSeek's GitHub repository labels it developer-preview software and warns that compatibility-breaking changes will occur. It can run as a desktop app or a web UI launched from code; using the web UI requires choosing a workspace and configuring a model/provider. The official privacy policy distinguishes official-model services from custom-model services: custom-model inputs are routed to the selected provider under that provider's policies, while the policy also lists session logs and user-provided content among data processed in connection with the services. The exact mode-specific capture and retention behavior was not independently tested, so do not generalize a privacy guarantee. The official safety notice says the software has not undergone a security audit and can execute generated code, commands, plugins, and access available files, processes, network, or credentials. Use least privilege and an isolated disposable environment; do not treat it as production-ready. No fixed all-in price or account-level usage allowance is asserted.
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