FelipeCam-DevCS/RPGToolKit ? reverse-engineered prompt

Build me a simple Python RPG toolkit that helps me manage the core parts of a text based role playing game.

I want it to have a clear structure for game data, game logic, and basic screens or views, so I can create characters, track stats, handle items or inventory, and run simple battles or actions without everything being tangled together. Please set it up so it is easy to extend later with more game features, and keep the code clean and organized with sensible error handling.

If it helps, use the existing project structure and make a small working demo I can run from the main file. Add a few basic tests too, so I can see the main pieces working. If you need to check current Python best practices or library docs, go ahead and look them up online.