It frequently gets indentation wrong on projects, then tries to write sed/awk scripts. Can't get it right, then write a python script that reformats the whole file on stdout, makes sure the indentation is correct, then writes requests an edit snippet.

And you might be thinking. Well, you should use a code formatter! But I do!

And then you might say, well surely you forgot to mention it in you AGENTS/CLAUDE file. Nope, it's there, multiple times even in different sections because once was apparently not enough.

And lastly, surely if I'm watching this cursed loop unfold and am approving edits manually, like some bogan pleb, I can steer it easily... Well, let me tell ya... I tried stopping it and injecting hints about the formatter, and it stick for a minute before it goes crazy again. Or sometimes it rereads the file and just immediately fucks up the formatting.

I think when this shit happens, it probably uses like 3x more tokens.

For a Rust project, it recently stated analysing binaries in the target as directory a first instinct, instead of looking at the code...

Good grief.