GitHub Copilot is an AI-powered coding assistant developed by GitHub and OpenAI that integrates directly into your development environment, providing real-time code suggestions, conversational chat support, and autonomous coding agents. Operating as an AI pair programmer, it accelerates development by autocompleting code, generating tests, refactoring logic, and answering technical questions—all while learning from context across your workspace. Available across multiple IDEs and plans (Free, Pro, Business, Enterprise), Copilot supports numerous AI models including GPT-4o, Claude Sonnet, and OpenAI's o1 series, with extensive customization through instructions, prompt files, and MCP integrations. The key to maximizing Copilot's value lies in understanding its interaction surfaces—inline suggestions operate differently than chat commands, which differ from agent mode—and providing clear, specific context to guide the AI toward accurate, relevant outputs.