Copilot SDK Now Generally Available Across Six Languages

TL;DR

• GitHub Copilot SDK is now GA with stable APIs and production support
• Available in Node.js, Python, Go, .NET, Rust, and Java
• New Rust SDK, multi-client workflows, and improved diagnostics since preview

New

• Rust and Java SDKs — Full language support added at GA; Rust bundles the Copilot CLI binary by default
• Multi-client session workflows — Different clients can now contribute tools and permissions to the same session
• Slash commands and interactive prompts — Available across all SDKs for richer user interactions
• Custom tools and MCP support — Register autonomous tools, connect Model Context Protocol servers, or override built-in tools like grep and edit_file
• Fine-grained system prompt customization — Edit individual prompt sections (identity, tone, tool instructions, safety rules) without full rewrites
• OpenTelemetry tracing — W3C trace context propagation across CLI, JSON-RPC, sessions, and tool execution
• Flexible authentication — GitHub OAuth, GitHub Apps, environment tokens, and BYOK for OpenAI, Microsoft Foundry, Anthropic
• Cloud and remote sessions — Cloud-backed sessions with repo metadata or on-demand remote session URLs
• Hook system — Intercept agent behavior at pre/post tool use, session start, MCP calls, and permission requests

Improved

• API surface is now stable and production-ready after coordinated cleanup based on preview feedback
• Better diagnostics for debugging slow or failing connections

Install: Node.js: npm install @github/copilot-sdk | Python: pip install github-copilot-sdk | Go: go get github.com/github/copilot-sdk/go | .NET: dotnet add package GitHub.Copilot.SDK | Rust: cargo add github-copilot-sdk | Java: Maven/Gradle. Available to all Copilot subscribers and non-Copilot users via BYOK. Get started here.

Source: GitHub Changelog