GitHub Copilot Customizations (github.com)

Microsoft’s “GitHub Copilot Customizations” repo curates prompts, coding instructions, chat modes and collections to tailor GitHub Copilot and Copilot Chat for specific domains, languages and workflows. It bundles task-specific prompts (.prompt.md), project-wide coding standards (.instructions.md), AI personas/chat modes (.chatmode.md) and themed collections (.collection.yml), plus utility scripts for maintenance. Users can invoke items directly in Copilot Chat with slash commands (example: /awesome-copilot create-readme), have instructions automatically applied to files by pattern, and activate personas for roles like architects, DBAs or security experts. The project is MIT-licensed, encourages contributions (with file naming/frontmatter rules and tests), and includes links to official Copilot and VS Code docs, security policy and contributor guidance. Technically, the repo ships an MCP Server to search and install customizations into editors; it runs via Docker (example config uses ghcr.io/microsoft/mcp-dotnet-samples/awesome-copilot:latest with stdio), so Docker must be installed to host the server locally. The setup enables streamlined installation to VS Code or other editors and enforces consistent coding standards and contextual guidance across projects. For ML/AI teams this means faster, repeatable prompt engineering, standardized code-generation behavior, role-specific expert guidance embedded in chat, and an extensible community-driven library to share best practices.