GitHub Copilot Setup and Best Practices for Daily Use

GitHub Copilot was the first AI coding assistant most engineers used and it's still a solid daily driver. The newer chat and agent features have closed much of the gap with dedicated tools. This guide covers installation, configuration, and — more importantly — the habits that separate engineers who get value from Copilot from those who fight it.

Install

• VS Code: install the GitHub Copilot extension from the Marketplace, sign in with your GitHub account.
• JetBrains: install from the plugin marketplace and authenticate via the IDE.
• Neovim: use copilot.vim or the LSP-based copilot.lua for Lazy users.

Subscription

There's a free tier with limits, an Individual plan, and a Business plan with stronger privacy controls (your code is never used to train models). Pick the tier that matches your employer's policies — most companies require Business.

Three modes

1. Inline completions: ghost-text suggestions as you type, accepted with Tab.
2. Copilot Chat: a chat panel inside the IDE for explanations, fixes, and small refactors.
3. Copilot Agents (Workspace): longer-running tasks that span multiple files, similar to Cursor's Composer.

Patterns that produce good code

• Write the function name and a docstring first. Copilot generates much better implementations when it has the contract.
• Open the related files. Suggestions improve when other relevant files are in your tab list.
• Be willing to reject. Tabbing through bad suggestions is a habit that leads to silent bugs.

Habits that hurt

• Accepting suggestions you didn't read line by line.
• Letting Copilot guess at security-sensitive code (auth, crypto, SQL builders).
• Skipping tests because "the AI wrote it."

Configuration tips

• Add a .copilotignore so secrets and lockfiles never appear in the context window.
• Disable Copilot in markdown if it autocompletes paragraphs you didn't ask for.
• Set up custom prompts in Copilot Chat for repeatable tasks like "explain this PR" or "write tests for this file."

Copilot vs the alternatives

Copilot is the most polished IDE-native experience and has the best multi-editor support. Claude Code wins on autonomous tasks, Cursor wins on multi-file edits inside the editor, and Codeium wins on price for individual developers. If you already pay for GitHub, Copilot is the lowest-friction option.