DeepSeek Harness: Open-Source Agent Runtime Offers Full Transparency and Plugin Control

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DeepSeek Harness (dsh) is an open-source, MIT-licensed code agent framework built on Cordis, a plugin-based runtime where every component — tools, UI, sandboxing, and orchestration — is a replaceable plugin. Unlike closed tools such as Claude Code, it provides a Trajectory view that logs each agent turn with precise timing, token usage, and full tool input/output, allowing developers to pinpoint exactly where a run failed. The framework enforces granular sandbox policies at the kernel level using Seatbelt and Landlock, with three access modes ranging from read-only to full-access, and sensitive operations require explicit human approval. Structured, readable error messages replace cryptic stderr output, making permission denials actionable rather than opaque. The project can be launched via a simple CLI in web, headless, or custom-profile modes, positioning itself as a distinct category of agent tooling aimed at transparency and developer control.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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