many people asked me how to write CLAUDE.md or AGENTS.md, and i see lots of bad advice flying around
so i took some time to write down a guide in blog.kunchenguid.com/p/your-agentsmd-is…
tl;dr
- handwrite your user level AGENTS.md
- for project level ones, you don't write it. you train it like a neural net
i also open sourced my private solution "backpass" at github.com/kunchenguid/backpass - it samples your past agent sessions for a repo, distill key learnings and losses, synthesize them, and produce a gradient descent step as a proposal that you can review and apply to improve your AGENTS.md and project level skills
easiest way to run it is just "npx -y backpass" in your repo
hope it helps! please share with whoever you think can benefit from it
Kun Chen
@kunchenguid

blog.kunchenguid.com
Your AGENTS.md is a Neural Net
And here’s how to properly train it with gradient descent
4:22 AM UTC · Aug 23, 2026 · 85.6K Views
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