In this talk, Nick Taylor walks through building a GitHub Copilot extension from scratch using the Copilot Extensions SDK and Hono.js.

You’ll learn:

• Best practices like payload validation, progress notifications, and error handling
• How to set up a development environment with port forwarding
• How to debug using the Node.js debugger

By the end, you’ll have a working Copilot extension and a strong grasp of the tooling and techniques to create your own.