Descriptions:
Fahd Mirza walks through the installation and configuration of DeepSeek Harness (DSH), an open-source agent framework quietly released by DeepSeek built on top of a plugin architecture called Cordis. Unlike DeepSeek’s model releases, DSH is infrastructure: it gives a language model the ability to read and edit files, run shell commands, delegate to sub-agents, and maintain a persistent plan — what Mirza describes as giving a “brain in a jar” a pair of hands.
The tutorial covers the full setup flow on Ubuntu using Node/npm, the web UI accessible at localhost:3080, and the four built-in session presets: Standard (full coding agent with files, shell, search, planning, and sub-agents), Code (tools exposed via a code SDK for multi-step TypeScript chains), Minimal (just bash and string-replace), and Creator mode for authoring custom presets. The plugin architecture means every capability — shell access, agent loop behavior, web search — is individually toggleable, and users can build and install their own plugins.
A key highlight is provider flexibility. The video demonstrates swapping out the DeepSeek API for Ollama running locally, using the default Ollama endpoint to pull in a 27-billion-parameter model, and notes that OpenRouter, Hugging Face, Xiaomi, and custom endpoints are all supported through the same settings panel. The result is a self-hostable, provider-agnostic coding agent that can run entirely on local hardware — a practical alternative to cloud-dependent tools like Claude Code or Cursor for developers who prefer to keep compute on-premise.
📺 Source: Fahd Mirza · Published August 15, 2026
🏷️ Format: Tutorial Demo
