GitHub Copilot

What it is

Copilot is GitHub's completion + chat assistant, embedded in VS Code and most IDEs, with an agent mode for multi-file edits and PRs.

Why people use it

• Zero-setup inside VS Code.
• Broad language coverage.
• Agent mode now handles whole tasks end-to-end.

Watch-outs

• Vendor lock-in to GitHub/Microsoft.
• Quality varies by language and repo.