DeepSeek Harness: Building and Extending AI Coding Agents Training Course
DeepSeek Harness (dsh) is an open-source agent harness developed by DeepSeek AI for creating and executing AI coding agents. Utilizing the Cordis plugin framework, it employs an "everything is a plugin" architecture where the model adapter, tool registry, session log, and agent loop function as replaceable components initialized at startup.
This live, instructor-led training (delivered online or onsite) is tailored for software developers and AI engineers who want to utilize DeepSeek Harness to build, manage, and extend AI coding agents within their own projects.
Upon completion of this training, participants will be equipped to:
- Install and execute DeepSeek Harness while configuring models.
- Manage coding tasks via the Web UI and command line interface.
- Describe the Cordis plugin architecture and its extension points.
- Create and release custom plugins for the harness.
- Automate harness operations through the SDK and headless mode.
Course Format
- Interactive lectures and group discussions.
- Extensive exercises and practical drills.
- Hands-on implementation in a live-lab setting.
Customization Options
- To request a tailored training program, please contact us for arrangements.
Course Outline
Introduction to DeepSeek Harness
- Overview of DeepSeek Harness and its role in the ecosystem
- The core design principle of "everything is a plugin"
- Exploring Web UI, CLI, and headless operational modes
Installation and Initial Setup
- Node.js prerequisites and package installation
- Launching the Web UI via npx
- Building and executing from source code
Model Configuration
- Configuring the DeepSeek API key
- Managing model selection and switching
- Integrating OpenAI-compatible endpoints
Workspaces and Sessions
- Managing workspace selection and switching
- Utilizing the session composer and managing conversation flow
- Interacting with files: reading, editing, and generation
Executing Coding Tasks
- Summarizing repositories and navigating code structures
- Running commands and delegating specific tasks
- Maintaining and updating 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
- Utilizing filesystem, terminal, and shell tools
- Support for Model Context Protocol
- Integration with Language Server Protocol
Subagents and Task Delegation
- Creating and forking subagents
- Using product providers for external coding agents
- Distributing work across a session
The Cordis Plugin Model
- Understanding plugins as services, events, and effects
- Managing shared context and lifecycle
- The absence of a privileged core
Profiles, Bundles, and Configuration
- Applying profile and bundle layering
- Modifying configuration via cordis.patch.yml
- Reviewing the boot process tree
Core Subsystems
- The append-only session log mechanism
- Assembly of system prompts and tool schemas
- Understanding the agent loop and turn progression
Events and Extension Points
- Handling session, agent, and capability events
- Implementing waterfall and interceptor events
- Aligning behavior with specific extension points
Plugin Development
- Registering services on context keys
- Incorporating tools and model adapters
- Publishing and discovering new plugins
SDK, Headless Mode, and Automation
- Controlling the harness from external processes
- Utilizing TypeScript and Python SDKs
- Automating via CLI and headless mode
Requirements
- Fundamental knowledge of software development
- Proficiency with command line tools and Git
- Basic familiarity with JavaScript or TypeScript
Target Audience
- Software developers
- AI and machine learning engineers
- DevOps and platform engineers
Need help picking the right course?
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DeepSeek Harness: Building and Extending AI Coding Agents Training Course - Enquiry
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