They can actually - I thought they couldn’t , but the latest ones can, much to my surprise.
I changed my mind after playing with cursor 2 ( cursor 1 had lasted all of 10 mins), which actually wrote a full blown app with documentation, tests , coverage, ci/cd, etc. I was able to have it find a bug I encountered when using the app - it literally ran the code, inserted extra logs, grepped the logs , found the bug and fixed it.
I changed my mind after playing with cursor 2 ( cursor 1 had lasted all of 10 mins), which actually wrote a full blown app with documentation, tests , coverage, ci/cd, etc. I was able to have it find a bug I encountered when using the app - it literally ran the code, inserted extra logs, grepped the logs , found the bug and fixed it.