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GitHub Copilot

What it is

An AI pair programmer that provides autocomplete-style suggestions as you code. It is powered by OpenAI models and integrated into various IDEs. It can also be used via CLI.

What problem it solves

Speeds up coding by generating inline code suggestions, reducing the time spent writing boilerplate and looking up API usage.

Where it fits in the stack

Development & Ops. Provides AI-powered code completion as an IDE extension.

Typical use cases

  • Inline code completion while writing code
  • Generating boilerplate and repetitive patterns
  • CLI-based code generation

Strengths

  • Deep integration with GitHub ecosystem
  • Supported in many popular IDEs
  • Continuously improved with newer OpenAI models

Limitations

  • Requires a paid subscription
  • Cloud-based; code snippets are sent to external servers for inference

When to use it

  • When you want a well-supported, mainstream AI code completion tool
  • When working within the GitHub ecosystem

When not to use it

  • When strict local-only code processing is required
  • When you prefer a free alternative (consider Codeium)

Getting started

GitHub Copilot is available as an extension for VS Code, Visual Studio, JetBrains, and Neovim.

  1. Install: Install the "GitHub Copilot" and "GitHub Copilot Chat" extensions.
  2. Auth: Sign in to your GitHub account with an active Copilot subscription.
  3. Use: Start typing to see inline suggestions, or press Cmd+I (Mac) / Ctrl+I (Windows) to open the chat.

Usage examples

Copilot Chat Commands

Use slash commands in the chat sidebar to perform specific tasks: - /explain: Get an explanation of the selected code. - /fix: Propose a fix for bugs in the selected code. - /tests: Generate unit tests for the current file.

GitHub Copilot CLI

The Copilot CLI brings AI assistance directly to your terminal for explaining commands or generating scripts.

# Install the GitHub CLI (if not already installed)
brew install gh

# Authenticate with GitHub
gh auth login

# Install the Copilot CLI extension
gh extension install github/gh-copilot

# Ask for a command explanation
gh copilot explain "git log --oneline --graph --all"

# Suggest a command for a task (interactive)
gh copilot suggest "find all large files over 100MB and delete them"

# Update the CLI extension
gh extension upgrade gh-copilot

Workspace Agent

Use the @workspace participant to ask questions about your entire project with full context: 

@workspace How are the API routes structured in this project?
@workspace Where is the database connection initialized?
@workspace /explain How the authentication middleware works.

Sources / references

Contribution Metadata

  • Last reviewed: 2026-05-15
  • Confidence: high