DeepSeek Harness: Building and Extending AI Coding Agents Training Course
DeepSeek Harness (dsh) is an open-source framework by DeepSeek AI designed for creating and executing AI coding agents. It is built on the Cordis plugin system, employing an "everything is a plugin" architecture where the model adapter, tool registry, session log, and agent loop function as interchangeable components that can be configured during startup.
This live, instructor-led training, available online or on-site, is tailored for software developers and AI engineers looking to leverage DeepSeek Harness to create, manage, and expand AI coding capabilities within their own projects.
Upon completion of this training, participants will be equipped to:
- Set up and run DeepSeek Harness, including model configuration.
- Execute coding tasks via the Web interface or the command line.
- 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
- Engaging lectures and group discussions.
- Extensive exercises and practical drills.
- Real-time implementation in a live-lab setting.
Customization Options
- Please reach out to us to arrange 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 approach
- Utilizing the Web UI, CLI, and headless modes
Setup and Initial Execution
- Node.js prerequisites and package setup
- Launching the Web UI using npx
- Compiling and running from source code
Configuring Models
- Setting the DeepSeek API key
- Choosing and switching between models
- Integrating OpenAI-compatible endpoints
Managing Workspaces and Sessions
- Selecting and switching active workspaces
- Using the session composer and managing conversation flow
- Reading, modifying, and generating files
Executing Coding Tasks
- Summarizing repositories and exploring codebases
- Running commands and delegating tasks
- Maintaining a structured task plan
Permissions and Sandboxing
- Implementing approval and permission policies
- Restricting file and command access
- Managing local and remote sandbox environments
Native Tools and Integrations
- Using 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 external coding agents
- Delegating work across active sessions
The Cordis Plugin Framework
- Defining plugins as services, events, and effects
- Understanding the shared context and lifecycle
- The rationale behind a non-privileged core
Profiles, Bundles, and Settings
- Managing profiles and bundle layering
- Modifying configuration via cordis.patch.yml
- Reviewing the initialized component tree
Internal Subsystems
- The append-only session logging system
- Assembling system prompts and tool schemas
- Understanding the agent loop and turn processing
Events and Extension Capabilities
- Handling session, agent, and capability events
- Utilizing waterfall and interceptor events
- Aligning behaviors with specific extension points
Plugin Development
- Registering services using context keys
- Implementing tools and model adapters
- Publishing and discovering available plugins
SDK, Headless Mode, and Automation
- Controlling the harness from external processes
- Using the TypeScript and Python SDKs
- Implementing CLI and headless automation
Requirements
- A solid grasp of software development basics
- Proficiency with the command line and Git
- Familiarity with 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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