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This is codex with gpt 5.4 (paid plan) on high reasoning: it just needed to remove the useViewer reference (it's just a react query) instead it left a useless useViewer call and removed unrelated code. You guys are joking right? This is the best LLMs have to offer?

Another example: told it to fix a conflicting warning in VSCode (medium reasoning) it simply replaced the entire VSCode configuration file (tbf while also fixing the issue)

Somewhere in the middle of my prompts it also created a git repo in one of my subprojects (monorepo setup) causing me to spend 10 minutes trying to understand why the git diff in VSCode and locally was different.

Another example is I asked it to update to the latest tsdown version (that generates .mjs files instead of js ). I had to spoon-feed it the other two places where it needed to update references (package.json and dockerfile).