CLAUDE.md
A text file that Claude reads at the start of every session. It’s like an instruction sheet stuck on the fridge for a new colleague.
How it appears in the course
CLAUDE.md is a text file with instructions about the project.
CLAUDE.md is an ordinary text file, in Markdown format (plain text with a few marks for headings and lists; hence .md).
/init — Claude looks through the project and writes a first version of CLAUDE.md by itself.
Where you learn it
In module 02 · CLAUDE.md: your project’s memory, in the Claude Code for Beginners course.
Related terms
Learn Claude Code from zero, in plain English
12 modules with 1–2 minute lessons, which you can also do on your phone. The first two modules are free.