2d • General Discussion 💬
Add these 3 lines in your CLAUDE.md
If you use Claude Code
then I am pretty sure you know what is CLAUDE md
Your CLAUDE md is set up right
But your token bill is still huge
CLAUDE md is not lazy loaded
It gets sent on every single message, every session, whether you needed it or not
So the fix isn't adding more rules to it
It's making the rules you already have actually cheap and enforce
I added just 3 lines to mine and output tokens dropped noticeably
╰┈➤When editing code, output ONLY the changed lines or the single modified block — never reprint the whole file.
╰┈➤No setup guides, no recaps of what you changed, no explanations unless I explicitly ask.
╰┈➤Keep responses tight. If one line answers it, give one line
That's it. No 2000 token essay of "best practices."
Just rules that remove waste on every reply
Second thing I keep seeing
People running Opus for everything, even one line fixes and simple questions
Opus is for the hard stuff. Architecture calls, big refactors
Sonnet handles almost all day to day coding at a fraction of the cost
Haiku is fine for quick lookups and small edits
Match the model to the task
Your CLAUDE md handles the output side
Model choice handles the input side
Do both and the difference in your bill is not small
What's one CLAUDE md rule that actually changed how Claude behaves for you?
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Add these 3 lines in your CLAUDE.md
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