Cursor Wrote the Test Suite I Kept Avoiding

I told Cursor to write unit tests for one module and described the cases in plain words. It produced a suite I'd put off for a month in about ten minutes.

The fix is scope. 'Write tests for this file' gets a decent first pass; 'write tests for these three functions with edge cases' gets something I can merge.

I read every line before committing. It once tested the wrong boundary and would have passed a bug through. The speed is real; the oversight isn't optional.

Agents that touch files need the review you'd give a human. Faster doesn't mean unsupervised.