CodeTour is a VS Code extension that helps development teams visually explain their codebase through a series of tour "steps." Unlike traditional onboarding methods, CodeTour integrates directly into the developer's IDE and supports markdown, linking to other steps or tours, and interactive prompts. By using CodeTour in conjunction with Coder, teams can source-control their development environments and run them in the cloud, streamlining the onboarding process for new developers.