npm
A “store” of ready-made code pieces for JavaScript, used from the terminal. npx starts such a piece without installing it; pnpm is an alternative to npm.
How it appears in the course
The npm option — only if you already have Node.js installed, version 18 or newer. If you don’t know what that is, skip it.
“Check with: npm test -- auth” — the command that runs the tests for the login part.
To add a new rule, you tell Claude directly, for example: “add to CLAUDE.md the rule: always use pnpm, not npm” (two similar programs for installing packages). Claude writes it into the file.
Where you learn it
In module 00 · Installation and first steps, 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.