Launch Mains
Open the app. During onboarding, choose the agent runtime you want — Claude Code, OpenAI Codex, GitHub Copilot, or Cursor — and continue. You land on that agent’s workspace, ready to start working. Switch to another runtime from the sidebar anytime.
Import a repository
Click Add Repository and import a repository — paste a remote URL or select a local path. Mains creates an isolated Git worktree for the workspace automatically.
Run an agent task
Open your workspace and type a goal in the agent input — for example, “Fix the login bug”. The agent will read files in the repository, write code, and run commands to accomplish the task.
Review diffs
After the agent finishes its run, open the Changes tab in the workspace sidebar. You will see a diff view of every file the agent modified, so you can review changes before committing.
Request code review
You can ask the agent to explain its changes or provide a code review. Just use agent skill /code-review in the chat input, and the agent will generate a review based on the diffs and the conversation history.