[wouldbecouldbe]

Yeah that's the skeptical key point.

The practical key point is: if you want to do a large migration is to have a very good & extensive test suite that Claude is not allowed to change during the migration. Then Claude is extremely impressive and accurate migrating your codebase and needs minimal handholding. If you don't have a test suite, claude will be freewheeling all the way. Just did an extensive migration project, and should have focused on the test suite much more.

[helpfulfrond]

Yeah, apparently the original library has nearly 4,000 tests. This would have been impossible without those. This speaks to the power of testing. The lack of discussion here also shows how under-valued it is.

[wouldbecouldbe]

Testing in the human era I think was less usefull. Too many tests would lead to high maintenance costs. In the AI era its a lot more easy to manage.