This means the prototype isn’t just a static design. It includes real interactions, user flows, navigation, validations, and basic working components similar to the final application.

It’s an early version, but already usable.

This implies the frontend is built with best practices that allow the project to:

Add new features without breaking existing ones

Maintain and improve the code easily

Integrate with microservices or APIs

Reuse components

Support more users or traffic in the future

In other words, the prototype is designed to grow without becoming chaotic.