Two things LLM coding agents are still bad at

Re:Two things LLM coding agents are still bad at by ngruhn on Thursday October 09, 2025 @02:50PM (#45531575)

I was about to write my own tool for this but then I discovered:

   git diff --color-moved=dimmed-zebra

That shows a lot of code that was properly moved/copied in gray (even if it's an insertion). So gray stuff exactly matches something that was there before. Can also be enabled by default in the git config.

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Re:Two things LLM coding agents are still bad at by VMG on Thursday October 09, 2025 @02:59PM (#45531672)

Perfect. This is why I visit this website

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Re:Two things LLM coding agents are still bad at by erichocean on Thursday October 09, 2025 @03:34PM (#45532088)

I used autochrome[0] for Clojure code to do this. (I also made some improvements to show added/removed comments, top-level form moves, and within-string/within-comment edits the way GitHub does.)

At first I didn't like the color scheme and replaced it with something prettier, but then I discovered it's actually nice to have it kinda ugly, makes it easier to detect the diffs.

[0] https://fazzone.github.io/autochrome.html

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Re:Two things LLM coding agents are still bad at by karczex on Thursday October 09, 2025 @03:21PM (#45531943)

Thanks:)

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Re:Two things LLM coding agents are still bad at by paulhebert on Thursday October 09, 2025 @05:36PM (#45533364)

I would love if GitHub implemented this in their UI! There’s and issue: https://github.com/orgs/community/discussions/9632

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Re:Two things LLM coding agents are still bad at by godelski on Thursday October 09, 2025 @08:50PM (#45534509)

That's a great solution and I'm adding it to my fallback. But also, people might be interested in diff-so-fancy[0]. I also like using batcat as a pager.

[0] https://github.com/so-fancy/diff-so-fancy

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