Yup. Feels very much it's creating a mess on purpose IMHO.

It's like an over-eager junior engineer that will implement whatever pattern they read about last week. It just doesn't feel trained on high-quality enterprise, battle-hardened codebases.

Even Opus 5.5 on High thinking still littered a root directory of a JS project with source files without thinking to put it in a 'src' directory. It had to be told to use a testing framework. Had to be told to also test with Firefox (the project already had established Chrome /and/ Firefox targets).

I have to continuously burn tokens and effort correcting it.

I imagine it performs a bit better with a huge corpus of architecture and style guides. But I did expect to get some that for free with the "leading" model.