amialysis/project-alpha-8492 ? reverse-engineered prompt

Build me a simple Python app from scratch that has a clean starting point and actually does something useful.

I want it to be easy to run from the command line, with one main entry file and clear structure so I can expand it later. If you need to look up current docs online, go ahead. Make the code readable, add helpful comments where needed, and include a basic way to test that it works.

Keep it lightweight and practical, since this repo is basically empty right now. I just want a solid first version I can build on without having to untangle a mess later.