That is interesting. I use Opus 5 as my daily driver, and it pretty much just works.

For example, a few weeks ago I asked it to analyse my code and find duplicated code that could be extracted into reusable libraries. It found several good examples and did the refactoring. I reviewed the result, and it was 100% how I would have coded it myself.

I do almost no manual coding these days. Opus 5 just works for me.

So it is strange for me to read comments like yours saying that it doesn't work. It would be interesting to find out what makes the difference?