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Mains supports running multiple agent sessions at the same time — both Claude Code and Copilot. Each session operates in its own Git worktree, so file changes in one session never conflict with another.

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How It Works

Git worktrees let you check out multiple branches from the same repository into separate directories. Each worktree has its own working copy of the files while sharing the same Git history and remotes. Mains uses this to isolate parallel sessions completely.
  • Each session gets its own working directory — no shared file state
  • Changes in one worktree don’t affect others
  • All worktrees share Git history and remote connections
  • Sessions can run different branches simultaneously

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Creating Workspaces

Mains handles worktree creation automatically. When you click Add Workspace and import a repository — either from a remote URL or a local path — Mains creates a dedicated Git worktree for that workspace behind the scenes. Each workspace gets its own isolated working directory, so you can run multiple sessions on the same repo without any file conflicts.

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When to Use What