Sanghun Kang

Thanks, you're right. WAL supports concurrent access, but depending on how Codex handles locking, running multiple instances at the same time can lead to startup failures or temporary hangs. In my case, I switch to another account when one runs out of usage. Since I don't run both instances at the same time, I haven't encountered these issues so far. They could occur if you run both simultaneously. I've updated the post to clarify this. Thanks for pointing it out!