Also, how do I verify that this fork isn’t malware wrapped in emulator code?

The code is open source, you read it all, ensure that you download exactly the code you read, and you compile it yourself. That’s the only way, in general, to accomplish this.

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To be that dick, a headless component library is still meant to do something, show an example of it being used!

You can also just… pay for it? I give money to JetBrains in exchange for incredibly useful tools. It’s okay to pay for things.