CLAUDE.md
product on 5 shows · 6 statements across 6 episodes · said 21 times in 2 episodes since 2026
the Y Combinator Startup Podcast 20 
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6 statements about CLAUDE.md, every show
Rauch: Anthropic long refused to support agents.md, requiring claude.md files
“For example, I don't know if they've adapted yet, but Anthropic for a long time was not playing ball with agents.md. You could only call their instructions claude.md.”
Willison: Minimal code skeletons guide AI agents better than long Claude.md instructions
“So sometimes, some people will tell you should have a Claude.md with like paragraphs of text describing how you like to work. I don't tend to do that because instead I start with a very thin skeleton that just gives it enough hints on how I like to work that i…”
Gaskill: Keep Claude.md Agent Context Files Under 200 Lines
“A best practice for those Claude.md files is to keep it around like no more than 200 lines.”
Delete oversized CLAUDE.md files and start fresh rather than compacting them
“If you hit this, my recommendation would be delete your QuadMD and just start fresh.”
Martin: Claude Code uses zero automation for reading and writing memory
“For reading memories, they just suck in your Claude MDs every time. So every time you spin up Claude Claude code, it pulls in all your Claude MDs. For writing memories, The user specifies, hey, I want to save this to memory, and then CloudCode writes it to Clo…”
Anthropic implements Claude Code memory as a plain CLAUDE.md auto-read file
“And WhatMD, it's another example of this idea of, you know, do the simple thing first. We had all these crazy ideas about, like, memory architectures, and, you know, there's so much literature about this. There's so many different external products about this,…”