# DeepSeek Harness — Plugin-Based Coding Agent Runtime

> DeepSeek Harness (DSH) is an open-source, plugin-based coding agent runtime from DeepSeek AI. It adopts a modular architecture where everything is a plugin, enabling extensible agent workflows.

## Install

Save as a script file and run:

# DeepSeek Harness — Plugin-Based Coding Agent Runtime

## Quick Use
```bash
npm install -g deepseek-harness
dsh init my-project
dsh run
```

## Introduction
DeepSeek Harness (DSH) is an open-source coding agent runtime built by DeepSeek AI. Its core philosophy is that everything is a plugin, enabling a highly modular and extensible agent architecture. DSH provides a TypeScript-based runtime for orchestrating AI coding agents with a plugin ecosystem.

## What DeepSeek Harness Does
- Provides a plugin-based runtime where every component is modular and replaceable
- Orchestrates AI coding agents with an extensible architecture
- Supports community-contributed plugins via the Cordis plugin system
- Enables custom agent workflows through composable plugin chains
- Offers a TypeScript-native development experience for agent builders

## Architecture Overview
DSH is built on the Cordis plugin framework, which treats every capability as a plugin. The runtime loads plugins dynamically, each registering hooks and services that compose into a full agent workflow. This design lets developers add, replace, or extend any part of the system without modifying core code.

## Self-Hosting & Configuration
- Install via npm or clone the repository from GitHub
- Configure plugins through a declarative configuration file
- Extend functionality by authoring custom Cordis plugins
- Supports environment variable configuration for API keys and endpoints
- Deploy as a local CLI tool or integrate into CI/CD pipelines

## Key Features
- Everything-is-a-plugin architecture for maximum extensibility
- Built on the Cordis plugin system for lifecycle-managed components
- TypeScript-native runtime with full type safety
- Active plugin ecosystem with community contributions
- Open-source under permissive license by DeepSeek AI

## Comparison with Similar Tools
- **Claude Code** — proprietary CLI with built-in capabilities; DSH is open-source and plugin-driven
- **OpenAI Codex CLI** — focuses on OpenAI models; DSH is model-agnostic via plugins
- **Aider** — git-aware pair programming; DSH is a runtime for composable agent plugins
- **Cline** — VS Code extension; DSH is a standalone CLI runtime

## FAQ
**Q: What models does DSH support?**
A: DSH supports DeepSeek models natively and can integrate other providers through plugins.

**Q: Is DSH free to use?**
A: Yes, DSH is fully open-source.

**Q: Can I write my own plugins?**
A: Yes, DSH uses the Cordis plugin API which provides hooks and service registration for custom extensions.

**Q: How does DSH compare to using DeepSeek models directly?**
A: DSH adds an agent runtime layer with plugin orchestration, file operations, and workflow management on top of raw model access.

## Sources
- https://github.com/deepseek-ai/deepseek-harness


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Source: https://tokrepo.com/en/workflows/asset-605a7170
Author: Script Depot