Comment by pshirshov

Ah, by the way. I've tried to do the same with Codex (gpt-5.1-codex-max) and Gemini (2.5 pro), both failed spectacularly. This job was done mostly by Sonnet 4.5. Java 6 did not require intensive supervision. Java 7 parts are done with Opus 4.5 and it constantly hits its limits, I have to regularly intervene.