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Copilot SDK in public preview - GitHub Changelog
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The GitHub Copilot SDK is now available in public preview.
Key facts
- Editor’s note (April 6, 2026): Updated Azure AI Foundry to the current name of Microsoft Foundry
- The Copilot SDK is available to all Copilot and non-Copilot subscribers, including Copilot Free for personal use and BYOK for enterprises
- The Copilot SDK exposes the same production-tested agent runtime that powers GitHub Copilot cloud agent and Copilot CLI
Summary
The Copilot SDK exposes the same production-tested agent runtime that powers GitHub Copilot cloud agent and Copilot CLI. -.NET: dotnet add package GitHub. Custom tools and agents: Define domain-specific tools with handlers and let the agent decide when to invoke them. Fine-grained system prompt customization: Customize sections of the Copilot system prompt using replace, append, prepend, or dynamic transform callbacks. Blob attachments: Send images, screenshots, and binary data inline without writing to disk.