Skip to main content
When an agent modifies files in your workspace, Mains captures every change and presents them in a built-in diff viewer. You can review exactly what was added, removed, or modified — then decide what to keep, discard, or edit before syncing with your repository.

​
Reviewing Changes

After an agent session completes work, open the diff viewer to see all modified files. Changes are displayed in a unified diff format with line-by-line highlighting:
  • Green lines — newly added code
  • Red lines — removed code
  • File list — all changed files in a sidebar, grouped by directory
You can navigate between files, expand or collapse context lines, and inspect each change individually.

​
Actions

The diff viewer guides you through the steps to get your changes merged:

​
GitHub Sync

The diff viewer integrates with GitHub to streamline the merge workflow. After reviewing changes you can commit, push, and open a pull request without leaving Mains. Mains suggests a commit message based on the changes and the agent’s session context. The diff viewer works with any Git repository — GitHub, GitLab repos. The PR creation shortcut requires a GitHub remote.