> somehow managed to implement a 200L custom TCP server for a simple static HTTP mock server for a single test case

The sharp but over eager jr. dev is a very good analogy :)

I asked Opus why it used raw http client instead of api client that is already a dependency and it said: "you're right it's overkill" and proceeded to implement api client on top of raw tcp socket.

Or an eager contractor who bills by the hour with a big unallocated budget.