Your CLAUDE.md is probably making Opus 5.5 slower. The three lines Anthropic says to fix, how to set effort properly, and the prompt that cleans up your file for you.
By Ahmed Alassafi5 October 20267 min read
What's Inside
✂️The three lines from Anthropic's Opus 5.5 guide to find and fix
🎚️How to set effort in Claude Code (and the old setting that stopped working)
🤖The cleanup prompt: keep, cut, rewrite, move, with nothing edited until you approve
🧪A five-minute before and after test so you know it worked
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