Thanks for reporting a bug you have found in Cursor!
Please add the following info to help us diagnose your issue:
o3-mini’s code output in Composer Agent is routinely inappropriately formatted for use. (Haven’t tried other modes.) Instead of either generating a file or generating code in a cell that I can then take action with, the code is outputted as raw text (similar to cursor’s explanations). Perhaps it is missing some type of markdown-like cell wrapper? I suspect this is some type of issue with Cursor’s system prompt for o3-mini.