> have it write tests

Just make sure it hasn't mocked so many things that nothing is actually being tested. Which I've witnessed.

I’ve also seen Opus 4.5 and 4.6 churn out tons of essentially meaningless tests, including ones where it sets a field on a structure and then tests that the field was set.

You have to actually care about quality with these power saws or you end up with poorly-fitting cabinets and might even lose a thumb in the process.