I'd believe it. Not sure when this is, but if it's a few years old and business software, they could probably asume everyone uses java, which doesn't even have unsigned integers.

Right but just because it's `int id` doesn't mean all code that uses it will still work when it's negative.

True, but it does seem like the best alternative here. If it's a SOAP API in 2005 for business customers, for example, then it sounds like the least bad option of the four (tell consumers to update, hold up the whole company's deployment, push negative ints, or push longs). I'm just saying that to me, it isn't hard to believe this was the best option here.

With $MY_JOB in java, that was my assumption