The source code for this article is available on GitHub as a gist.
DeepSeek Harness (DSH) was officially released on 2026-08-13. Two revolutionary features offered by DSH set it apart from other harnesses such as Claude Code, Codex or OpenCode.
- Extensive customization. At the heart of DSH is the Cordis plugin framework following the philosophy, “Everything is a plugin”. Each component of DSH can be independently added, evolved, removed or replaced including core functionality such as the agent loop, taking the plugin-centric approach of the Pi coding agent to the next level
- Agent observability. Unlike Claude Code, Codex or OpenCode which function as black boxes, DSH provides native capabilities to inspect each and every part of the agent loop including the system prompt, intermediate context injection and tool calling. This makes DSH an excellent developer tool for debugging agent behavior and comparing key performance metrics such as time to first token (TTFT) and tokens per second across different model providers

Follow me through this article to set up DSH on Kubernetes with vLLM-Ascend as the model provider running on the OrangePi AI Studio Pro extension dock. The OrangePi AI Studio Pro features 2x Ascend 310P NPUs providing a combined 192G device memory (VRAM) and 352 TOPS (176 TFLOPS) AI computing power.
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