> You can usually tell a prototype that is pretending to be a human PR, but a real PR a human makes with AI assistance can be indistinguishable.

A couple of weeks ago I needed to stuff some binary data into a string, in a way where it wouldn't be corrupted by whitespace changes.

I wrote some Rust code to generate the string. After I typed "}" to end the method: 1: Copilot suggested a 100% correct method to parse the string back to binary data, and then 2: Suggested a 100% correct unit test.

I read both methods, and they were identical to what I would write. It was as if Copilot could read my brain.

BUT: If I relied on Copilot to come up with the serialization form, or even know that it needed to pick something that wouldn't be corrupted by whitespace, it might have picked something completely wrong, that didn't meet what the project needed.