Descriptions:
DeepSeek Harness — already at 190,000 GitHub stars and described by many as a free, self-hostable alternative to Claude Code — gets a full installation walkthrough and live demo from Sharbel A. in this tutorial. The video explains the core architectural distinction the project makes: Claude Code and similar tools are ‘harnesses’ where every internal decision has been made and closed by the vendor; DeepSeek Harness ships with all those decisions still open and configurable at runtime.
The walkthrough covers installation from scratch, model provider configuration (including swapping in GLM, Gemini’s free tier, or any Ollama-hosted local model instead of DeepSeek’s paid API), and the plugin system — which extends to the sidebar, commands, and virtually every other UI component. The creator builds a real plugin live: a Discord notification that fires when an agent run completes, including token count and cost in the message body.
The standout feature demonstrated is full run traceability: every tool call, system prompt, injected context, thinking step, and error is inspectable in a ‘trajectory’ view rather than summarized. The video also tests the framework’s stated resilience by killing an agent mid-task and resuming it — successfully picking up with identical context. Sharbel notes the project is still in developer preview with a release-candidate tag and warns that breaking changes are expected, but the core functionality shown is working.
📺 Source: Sharbel A. · Published August 28, 2026
🏷️ Format: Tutorial Demo
