I'm using Zed and Claude Code as my harnesses.
I use "subconsciously" in quotes because I don't remember exactly why I did it, but it aligns with the degradation of their service so it feels like that probably has something to do with it even though I didn't realize it at the time.
However you feel about OpenAI, at least their harness is actually open source and they don’t send lawyers after oss projects like opencode