Why do AGENTS.md and CLAUDE.md make an agent stupid?
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Links and resources:
• ETH Zurich research (arxiv): https://arxiv.org/abs/2602.11988
• Claude Code documentation (Memory): https://code.claude.com/docs/en/memory
ETH Zurich researchers have proven that auto-generated CLAUDE.md is harmful. But Boris Cherny, the founder of Claude Code, uses it every day. Someone is wrong.
In this video, we will understand why both are right and how to properly run CLAUDE.md so that it really helps and does not hinder.
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What you will learn:
Why auto-generated CLAUDE.md gives minus 3% to success and plus 20% to costs
How Boris Cherny keeps his CLAUDE.md and why he deletes the file when it gets bloated
4 levels of CLAUDE.md and where 98% of the context lives
What to put and what not to put - two columns that will change the approach
The 200-line rule - why more means worse
ReviseClaudeMD - a team that updates the file after each session
CLAUDE.md Improver - quality audit according to 6 criteria
Auto-memory vs CLAUDE.md - two levels of context and why they are needed both
Timecodes:
00:00 Three facts that contradict each other
00:56 Why most materials about CLAUDE.md are incomplete
01:55 What was actually tested at ETH Zurich
02:59 How Boris Cherny works with his CLAUDE.md
03:56 What happens when you run Claude Code
04:08 4 levels of CLAUDE.md - where to store what
07:05 Three key blocks where the difference is most obvious
09:32 What to put and what not to put
10:36 Andrey Karpaty - and his instructions
11:22 How to use init correctly
13:43 revise-claude-md - a command for constant updating
14:41 claude-md-improver - file quality audit
15:26 Automemory
16:20 Conclusion
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Write in the comments: how do you currently manage your CLAUDE.md - do you write by hand or generate automatically? 👇
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