GitHub Copilot burst onto the scene and now developers are looking for AI-driven integrations that bring their platforms' endpoints and best practices directly into their coding workflow. Layer can help create a Copilot extension in any language, seamlessly injecting your product's intelligence into GitHub Copilot and other AI surfaces. The process involves installing system prerequisites, such as Python and Ngrok, setting up webhook subscriptions like building a Discord bot, creating a server that handles HTTP requests from GitHub, exposing the local development server to the internet using Ngrok, registering a Github App for the subscription, and finally, installing and using the extension. Layer provides a unified platform for managing LLM extensions, handling Copilot, VS Code, OpenAI GPTs, Anthropic MCP, and beyond, allowing developers to focus on building a great user experience instead of juggling integrations.