copilot-instructions

Generate or update the .github/copilot-instructions.md file for GitHub Copilot custom instructions. Use when: (1) User wants to create Copilot instructions for a project, (2) User asks to update or improve existing Copilot guidelines, (3) User mentions 'copilot instructions', 'copilot guidelines', or 'copilot config'. Explores codebase to discover tech stack, file conventions, import patterns, component structure, code style, and testing approaches. Creates actionable instructions with code examples.