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Mains drives Cursor Agent CLI through the Agent Client Protocol. Install the CLI and sign in before starting a Cursor run.
Open Settings → Cursor for account and CLI status. Follow the update guidance there if your CLI is too old for supported model controls.

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Operating mode

These are Cursor’s operating modes inside Mains’s Code experience. They are separate from Mains’s Code, Work, and Chat modes. Cursor currently offers only Code in Mains.

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Model and effort

Mains discovers the runtime’s available models and supported configuration options. Select them in the composer. If an option is unavailable, update the CLI or choose a model that supports it. Conversation settings are retained on continuation. Cursor also supports forking an existing conversation.

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Permissions and tools

When Cursor asks for permission, Mains displays an approval request. Available options come from the request and runtime. In Code, Mains provides review-recording and package-check tools. Git commits and PR creation use Git actions, or the shell when explicitly requested. Cursor-native tasks, todos, and image generation can appear as ACP activity. They are separate from Mains’s plugin marketplace, which is not available for Cursor. For CLI-specific setup, see the Cursor CLI documentation.