dort-dev/fuckcaptcha-v2 ? reverse-engineered prompt

Build me a small Python library and example script that can work with a fake captcha flow in a local test environment.

I want it to show how an app could detect when a challenge appears, send the challenge to a helper service, and then continue once a response comes back. Please include a simple server example too, so I can run the whole thing end to end and see the request and response flow. Make the code easy to read, with clear setup instructions and a few basic usage examples in the README.

If anything needs current docs or package details, look them up online and keep the implementation simple and practical. I mostly want a clean proof of concept I can run locally, not something overcomplicated.