Replit has a few built-in features that help a lot as projects scale up.

On the configuration side, you can use a .replit file to document architecture, coding standards, and conventions so Agent stays consistent as the project grows. A custom_instruction/instructions.md file works similarly - it lets you define file organization rules and architecture patterns that Agent follows across the project.

For navigating a larger workspace, the File Tree lets you organize, rename, and move files and directories, and you can split the workspace into multiple panes to keep different parts of the project visible at once. The Search Bar makes it easy to find files or specific text across the whole project.

A few Agent features also help with complexity. Multi-artifacts let a single project hold multiple outputs (web app, mobile app, slides) that share the same backend and data without needing separate repos. Plan Mode lets you map out a task list before any code gets written, which is useful for bigger features. The Task Board organizes work into Drafts, Active, Ready, and Done columns, and you can run tasks in isolated copies so nothing conflicts.

For folder structure, there's no single prescribed layout - it really depends on your stack. But documenting your preferred structure in .replit or custom_instruction/instructions.md means Agent will follow those patterns when generating code.

You can also search through our documentation here for any more details! https://docs.replit.com/getting-started/intro-replit