“One person team” is a fairly common phrased to describe such a situation I believe. The “team” is the group of developers responsible for something, which may sometimes only contain one person.
You're technically correct, which, as we know, is the best (/s) kind of correct.
What matters is actual usage, and while "one person team" does grate on me somewhat, it's in wide usage, and it's understood what it means. So, "sorry, not sorry", but you're wrong.
Words mean whatever the standard usage of them is. You can’t just declare a word to have a certain meaning. This is not my opinion - this is what scholars of language believe about language. The meaning of words changes over time as society finds other uses for them.
