Claude Code
Proper name
Claude Code was built for people who write software, but it works with any kind of file, including Markdown notes. In the Claude desktop app, it runs in the Code tab, so you do not need to use the command line. Claude Code is available only on paid plans; the free Claude plan doesn’t include it.
At the start of every conversation, Claude Code loads a file called CLAUDE.md from the folder it is working in. The file holds your instructions for how Claude Code should work in that folder. According to the documentation, Claude Code treats these instructions as guidance rather than as strict rules. The documentation also says that the shorter and more specific the instructions are, the more consistently Claude Code follows them. If a folder has no CLAUDE.md, Claude Code reads AGENTS.md instead, which is the instructions file that other AI coding agents use.
In my articles
In the third episode of my series on building a second brain, I use Claude Code as an example of an agent that maintains a wiki using the LLM Wiki pattern. With Claude Code, the rules for the wiki go in CLAUDE.md. Any other agent that writes files to disk can maintain a wiki using the same pattern. Andrej Karpathy, who described the pattern, names several such agents.
Sources
Related articles
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All entriesLLM Wiki
“LLM Wiki” is a short note by Andrej Karpathy from April 2026. It describes a pattern in which a language model builds and maintains a wiki of Markdown files.
Andrej Karpathy
Andrej Karpathy is a computer scientist, a co-founder of OpenAI and a former director of AI at Tesla. He has also described a way to have a language model maintain a wiki.