Microsoft open-sources VS Code Copilot Chat extension on GitHub

Microsoft has open-sourced the GitHub Copilot Chat extension for VS Code under the MIT license, disclosing implementation details like agent mode, prompt design, and telemetry, and inviting community contributions via GitHub with supporting docs and an FAQ. Framed as a security- and transparency-driven milestone toward deeper AI integration in VS Code, Microsoft also plans to consolidate inline completions into this open module over the coming months.