
Hack-Log
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Hack-Log
@stealth_hacklog
AI×開発の実験日記。Claude / Open Claw / Ollama / MLX を Mac で動かしたり自動化したり。SaaS勤務の30代、本業の合間に検証してnoteに書いてます。たまにやりすぎて寝不足。



A single 𝗖𝗟𝗔𝗨𝗗𝗘.𝗺𝗱 file just hit 192k GitHub stars. (derived from Karpathy's coding rules) Andrej Karpathy observed that LLMs make the same predictable mistakes when writing code: over-engineering, ignoring existing patterns, and adding dependencies you never asked for. If you've used AI coding assistants, you've hit all of these. But here's the thing: If the mistakes are predictable, you can prevent them with the right instructions. That's exactly what this 𝗖𝗟𝗔𝗨𝗗𝗘.𝗺𝗱 does. You drop one markdown file into your repo, and it gives Claude Code a structured set of behavioral guidelines for your entire project. This is a big deal. - Built entirely around prompt engineering for AI coding assistants - No framework, no complex tooling, just one .md file that shapes behavior Developers are moving past "use AI to write code" and into "engineer the AI's behavior so the code is actually good." The Claude Code ecosystem is growing fast, and the best tools in it aren't always software. Sometimes they're just well-crafted instructions. 100% open-source. Link to the GitHub repo: github.com/multica-ai/and… That said, I wrote an article on the anatomy of the .claude folder, which was read by 11 million people. It's a complete guide to 𝗖𝗟𝗔𝗨𝗗𝗘.𝗺𝗱, hooks, skills, agents, and permissions, and how to set them up properly. The article is quoted below.

GPT 5.6 just deleted my entire production database of my $10,000 MRR SaaS!! I have never seen a model do this; I just lost all my customers and need to refund more than 50k today !? SERIOUSLY?


メルカリが公開した「Claude Codeを会社で安全に使うための設定と配り方」資料が有益。bypassなどやってはいけない操作制限から、全社員への設定の一括配布、さらにはエンジニアと非エンジニアで安全レベルを分ける方法まで体系的に解説。Claude Codeを会社で導入したい人は全員読んだ方がいい👇🧵