DeepSeek Harness: Building and Extending AI Coding Agents Training Course
DeepSeek Harness (dsh) is an open-source framework provided by DeepSeek AI, designed for creating and executing AI-driven coding agents. Grounded in the Cordis plugin ecosystem, it adopts an "everything is a plugin" architecture where key components—such as the model adapter, tool registry, session logging, and the agent loop—are modular and configurable at startup.
This instructor-led, live course, available online or on-site, is tailored for software developers and AI engineers looking to leverage DeepSeek Harness to construct, manage, and customize AI coding agents within their own projects.
Upon completion of this training, participants will be equipped to:
- Deploy and execute DeepSeek Harness, along with configuring model settings.
- Manage coding tasks via the Web interface and command-line tools.
- Describe the Cordis plugin architecture and its various extension points.
- Create and distribute custom plugins for the harness.
- Automate harness operations using the SDK and headless mode.
Course Format
- Interactive presentations combined with open discussions.
- Extensive practical exercises and drills.
- Hands-on application within a live-lab environment.
Customization Options
- Please contact us to discuss arrangements for a tailored training program.
Course Outline
Overview of DeepSeek Harness
- Defining DeepSeek Harness and its role in the ecosystem
- The "everything is a plugin" design principle
- Web UI, CLI, and headless operating modes
Setup and Initial Launch
- Node.js prerequisites and package setup
- Starting the Web UI using npx
- Compiling and executing from source code
Model Setup
- Configuring the DeepSeek API key
- Choosing and switching between models
- Incorporating OpenAI-compatible interfaces
Workspaces and Session Management
- Selecting and navigating between workspaces
- Using the session composer and managing conversation flow
- Viewing, modifying, and creating files
Executing Coding Tasks
- Summarizing repositories and exploring codebases
- Running commands and delegating tasks
- Maintaining an organized task plan
Permissions and Sandboxing
- Managing approval and permission policies
- Restricting file and command access
- Utilizing local and remote sandbox environments
Native Tools and Integrations
- Filesystem, terminal, and shell utilities
- Support for Model Context Protocol
- Integration with Language Server Protocol
Sub-agents and Task Delegation
- Creating and forking sub-agents
- Product providers for external coding agents
- Distributing work across sessions
The Cordis Plugin Architecture
- Plugins as services, events, and effects
- Shared context and lifecycle management
- The absence of a privileged core layer
Profiles, Bundles, and Configurations
- Managing profiles and bundle hierarchies
- Modifying settings via cordis.patch.yml
- Reviewing the initialized component tree
Essential Subsystems
- The append-only session logging mechanism
- Assembly of system prompts and tool schemas
- The agent loop and turn-based processing flow
Events and Extension Capabilities
- Session, agent, and capability-related events
- Waterfall and interceptor event patterns
- Aligning specific behaviors with extension points
Plugin Development
- Registering services under context keys
- Including new tools and model adapters
- Distributing and identifying plugins
SDK, Headless Mode, and Automation
- Controlling the harness from external processes
- Utilizing TypeScript and Python SDKs
- Automation via CLI and headless execution
Requirements
- A solid grasp of software development basics
- Proficiency with command-line interfaces and Git
- Fundamental knowledge of JavaScript or TypeScript
Target Audience
- Software developers
- AI and machine learning specialists
- DevOps and platform engineers
Open Training Courses require 5+ participants.
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