DeepSeek opens developer preview of open-source Harness agent tool

DeepSeek released a developer preview of DeepSeek Harness (dsh), an open-source agent harness positioned against Anthropic's Claude Cowork. It offers a web interface for running AI agents, uses a plugin-based structure, and is powered by DeepSeek's Cordis architecture. Launchable via npx @deepseek-ai/dsh web, the preview may introduce breaking changes and is MIT-licensed.
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