GitHub Copilot SDK Public Preview: Embed Agentic Capabilities in Any App via 5 Languages

GitHub Changelog·high signal

GitHub launched the Copilot SDK in public preview on April 2, 2026, exposing the same agent runtime that powers Copilot cloud agent and CLI. Available for Python, TypeScript, Go, .NET, and Java with built-in tool invocation, streaming, file operations, multi-turn sessions, and BYOK support for OpenAI/Azure/Anthropic. System prompt customization via replace/append/prepend/transform callbacks. Free for all users — each prompt counts against existing premium request quotas.