Features
June 11, 2026 · View on GitHub
These guides cover the capabilities you can add to your Copilot SDK application. Each guide includes examples in supported languages (TypeScript, Python, Go, .NET, Java, and Rust) where available.
New to the SDK? Start with the Getting Started tutorial first, then come back here to add more capabilities.
Guides
| Feature | Description |
|---|---|
| The Agent Loop | How the CLI processes a prompt—the tool-use loop, turns, and completion signals |
| Hooks | Intercept and customize session behavior—control tool execution, transform results, handle errors |
| Custom Agents | Define specialized sub-agents with scoped tools and instructions |
| Fleet Mode | Dispatch multiple sub-agents in parallel for large, independent workstreams |
| MCP Servers | Integrate Model Context Protocol servers for external tool access |
| Skills | Load reusable prompt modules from directories |
| Plugin Directories | Bundle skills, hooks, MCP servers, and agents as a single loadable plugin |
| Image Input | Send images to sessions as attachments |
| Streaming Events | Subscribe to real-time session events (40+ event types) |
| Steering & Queueing | Control message delivery—immediate steering vs. sequential queueing |
| Session Persistence | Resume sessions across restarts, manage session storage |
| Remote Sessions | Share locally hosted sessions to GitHub web and mobile via Mission Control |
| Cloud Sessions | Run sessions on GitHub-hosted compute through Mission Control |
Related
- Hooks Reference: detailed API reference for each hook type
- Integrations: use the SDK with other platforms (MAF, etc.)
- Troubleshooting: when things don't work as expected
- Compatibility: SDK vs CLI feature matrix