yyoukii/omp-cli ? reverse-engineered prompt

Build me a simple command line tool for this project called omp cli.

I want it to be a clean starter app that I can run locally, with a basic command help screen, a couple of useful example commands, and a structure that makes it easy to add more features later. Keep it lightweight and practical, and make sure the setup is straightforward so I can install it and try it quickly.

If there are any current best practices or docs you need to check while setting it up, go ahead and look them up. Please also include sensible defaults, friendly error messages, and a small example of how someone would use it from the terminal.