GitHub Copilot

GitHub Copilot is an AI coding assistant developed by GitHub and OpenAI, first released in 2021 and now part of Microsoft. It generates code completions, answers coding questions in chat, and runs autonomous agents that can plan, edit files, and open pull requests. The product spans inline autocomplete, IDE chat, terminal, GitHub.com, and mobile.

• Inline code completions and next edit suggestions across VS Code, Visual Studio, JetBrains IDEs, Eclipse, Xcode, and Neovim

• Copilot Chat for code questions, refactors, and explanations inside the IDE, web, mobile, and Windows Terminal

• Agent mode that autonomously edits files, runs terminal commands, and iterates on errors with user approval

• Coding agent that researches a repository, plans changes, and pushes commits to a branch when assigned a GitHub issue

• Copilot CLI for terminal-based tasks installable through npm, Homebrew, WinGet, and curl

• Multi-model selection covering OpenAI GPT, Anthropic Claude, xAI Grok, and Google Gemini

• AI code review, pull request summaries, and commit message generation in GitHub and GitHub Desktop

• Custom instructions and reusable prompt files for repository-specific conventions

• Copilot Autofix for vulnerability remediation through GitHub Advanced Security

• Multi-agent orchestration through Agent HQ for delegating tasks to Copilot, Claude, and Codex