mobile-dev-inc/maestro ? reverse-engineered prompt

Build me a simple open source tool for end to end testing on Android, iPhone, and web apps.

I want it to let me write tests in easy to read YAML, then run those flows from a command line against emulators, simulators, real devices, or a browser. The app should support common actions like opening the app, tapping buttons, typing text, scrolling, checking that something is visible, and waiting for screens to load without me having to add lots of delays.

Make it feel fast to use, with a clean setup, good error messages, and a way to run tests locally on a sample app. If it helps, look up current docs online for the best current approach to mobile and web automation.

It should be built in a way that can support a desktop testing experience later too, but the main goal is a reliable cross platform testing tool people can start using quickly.