GitHub Copilot Prompts & Custom Instructions

GitHub Copilot has evolved far beyond simple autocomplete. With Copilot Chat, custom instructions, and workspace-aware context, it is now a full coding assistant embedded in VS Code and other editors. But most developers are only using a fraction of what Copilot can do. The key to getting better suggestions is understanding how Copilot reads context and how you can shape its behavior with instruction files and prompt techniques.

Copilot supports custom instruction files (`.github/copilot-instructions.md`) at the repository level. These files let you define your project's conventions, preferred libraries, testing patterns, and coding style so Copilot incorporates them into every suggestion. For example, you can specify that your project uses TypeScript strict mode, prefers functional components, and follows a specific naming convention. This eliminates the need to repeat these preferences in every chat interaction and produces dramatically more consistent code.

When using Copilot Chat, specificity matters. Instead of asking "write a function to handle errors," include the expected input types, error cases you want handled, and whether you need try-catch, Result types, or error boundaries. Reference related files with #file mentions so Copilot understands the surrounding code. Browse our Copilot instruction templates and coding prompts to configure Copilot for your codebase and start getting better suggestions immediately.