How to Add a Postgres Database to Your Replit Agent Project

Replit Agent can configure development environments, build apps, and deploy them to the cloud without needing installation. It also adds data persistence to applications by configuring databases for users, ensuring that information remains accessible even after the app is closed or refreshed. Data persistence is crucial for functional apps as it prevents loss of user data between sessions. Replit Agent detects when an app requires data persistence and automatically adds a Neon Postgres database to support it. However, if Replit Agent doesn't add a database in the first iteration, users can prompt Agent to do so by asking for specific features that require persistent data. This is done by providing a natural language prompt that describes what the user wants to achieve, which guides Agent to implement the necessary backend and frontend changes. The process involves configuring a Postgres database via Neon, defining a database schema, and updating the app's UI to display the leaderboard and allow players to input their names.