DeepSeek Harness: Building and Extending AI Coding Agents Training Course
DeepSeek Harness (dsh) is an open-source framework developed by DeepSeek AI, designed to facilitate the creation and execution of AI coding agents. Leveraging the Cordis plugin framework, it adheres to an “everything is a plugin” architecture, where core components like the model adapter, tool registry, session logs, and agent loop are modular elements that can be swapped out or configured during initialization.
This live, instructor-led training—available either online or onsite—is tailored for software developers and AI engineers looking to leverage DeepSeek Harness for building, managing, and extending AI coding agents within their own projects.
Upon completion of this program, participants will be equipped to:
- Deploy DeepSeek Harness and configure model settings.
- Execute coding tasks via the Web UI and command-line interface.
- Describe the Cordis plugin architecture and its extension capabilities.
- Create and distribute custom plugins for the harness.
- Automate harness operations through the SDK and headless mode.
Course Format
- Interactive lectures paired with group discussions.
- Extensive exercises and practical application.
- Hands-on implementation within a live-lab setting.
Customization Options
- Contact us to discuss arrangements for a customized training experience.
Course Outline
Introduction to DeepSeek Harness
- Defining DeepSeek Harness and its role in the ecosystem
- The design philosophy of “everything is a plugin”
- Overview of Web UI, CLI, and headless modes
Installation and Initial Setup
- Node.js prerequisites and package management
- Starting the Web UI using npx
- Compiling and executing from source code
Model Configuration
- Configuring the DeepSeek API key
- Choosing and toggling between models
- Integrating OpenAI-compatible endpoints
Workspaces and Sessions
- Selecting and managing workspaces
- Utilizing the session composer and managing conversation flow
- Operations for reading, modifying, and generating files
Executing Coding Tasks
- Summarizing repositories and navigating codebases
- Running commands and assigning delegated tasks
- Managing and maintaining task plans
Permissions and Sandbox Environment
- Defining approval and permission policies
- Restricting file and command access
- Implementing local and remote sandbox backends
Native Tools and Integrations
- Filesystem, terminal, and shell utilities
- Support for the Model Context Protocol
- Integration with the Language Server Protocol
Subagents and Task Delegation
- Creating and forking subagents
- Utilizing product providers for other coding agents
- Distributing workloads across sessions
The Cordis Plugin Model
- Viewing plugins as services, events, and effects
- Understanding shared context and lifecycle management
- The absence of a privileged core
Profiles, Bundles, and Configuration
- Layering profiles and bundles
- Modifying configurations via cordis.patch.yml
- Reviewing the initialized system tree
Core Subsystems
- The append-only session logging system
- Assembly of system prompts and tool schemas
- Agent loop mechanics and turn progression
Events and Extension Points
- Handling session, agent, and capability events
- Managing waterfall and interceptor events
- Aligning behavior with specific extension points
Plugin Development
- Registering services on context keys
- Incorporating new tools and model adapters
- Distributing and discovering plugins
SDK, Headless Mode, and Automation
- Controlling the harness from external processes
- Using TypeScript and Python SDKs
- Automating tasks via CLI and headless execution
Requirements
- Foundational knowledge of software development principles
- Proficiency with command-line tools and Git
- Basic command of JavaScript or TypeScript
Target Audience
- Software developers
- AI and machine learning engineers
- DevOps and platform engineers
Open Training Courses require 5+ participants.
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