GitHub Copilot app for Beginners: Using the diff, terminal, and browser

GitHub Copilot has introduced built-in panels within its app to consolidate reviewing, running, and previewing code changes made by AI agents. Previously, developers had to switch between separate tools like editors, terminals, and browsers to verify agent-generated modifications. The new diff panel displays line-by-line changes with green highlights for additions and red for deletions, allowing users to accept, comment on, or request further adjustments directly in the app. This centralized approach aims to reduce context switching and improve oversight of AI-driven coding tasks.

The terminal panel enables running commands within the same session, supporting both manual execution and script configuration via a Run button. Users can open multiple terminal windows simultaneously to execute project-specific commands and review outputs without leaving the app. This feature simplifies testing and debugging by keeping the workflow contained within a single interface, minimizing distractions and improving efficiency during development cycles.

For projects with user interfaces, the browser panel allows developers to preview changes in real time, simulating how end users would interact with the updated code. The Pick & Polish tool lets users select elements and request adjustments from the AI agent, while the dev server script can be rerun to verify fixes. This panel closes the loop by providing a live environment to validate functionality and iterate on features before finalizing changes.

Once satisfied with the review, users can accept the changes directly in the Copilot app and create a pull request, completing the AI coding loop without tab switching. The integrated panels address key questions about code changes—what was modified, whether it functions correctly, and how it behaves—helping developers maintain control over AI-generated work. The feature is now available as part of GitHub Copilot’s ongoing updates.