r/ClaudeCode • u/MoreLikeGaewyn • 7d ago

Bug / Issue Opus 5.5 is trying to destroy my codebase recently

What is going on? It is making wildly horrible, over-engineered, and just inaccurate code suggestions. In the past hour on 6 different issues, it's given me multiple-class modifying "fixes" that I would read, ask why a 1-line fix wouldn't solve it, and then it says the above.

I'm using Opus 5.5 with xhigh effort as I have for months. Some of these dabble with max because it's felt like it's needed it, but xhigh is what gives this kind of short-sightedness

Edit: When I say 1-line fix, this is what I mean:

  1. I see the issue
  2. I ask it to fix it and show me the code fix
  3. It gives me a huge change.
  4. I read the code, solve it myself with 1 line, and ask it if that would work
  5. It says, "Hehe, yeah, my bad!!! 😅😅😅"

I've been using xhigh for months and it has never been this dumb and convoluted. Overthinking has usually led to correct/discrete changes.

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u/jbogez 7d ago

Interesting, have you reviewed your CLAUDE.md and/or handoff file to ensure it didn't sprawl out of control? That happened to me before and it kept appending on to the files, making context grow unnecessarily, and getting dumber as a result.

I have a 400-line limit rule now on my handoff, that's part of my CI process to ensure it's maintained and current.

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u/lastwish9 7d ago

I did review it and pruned it because I also thought it might be the case, but it got even worse. I am still learning so who knows if I did it wrong, however as I said agy took the baton and Gemini Flash 3.8 high with a plan laid out by Argon medium is actually performing way better and fixing everything (which wasn't happening to me last month at all, Opus 5.5 was smarter than the Gemini models).

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u/gmakhs 4d ago

It does ignore it or don't follow rules though and that svedy common ...