Typecheck

An automatic check that looks for the places where the code mixes things that don’t fit, for example a text where a number was needed.

You’ll also find it as: type checking

How it appears in the course

Commands: build (putting the program together), tests (including how to run a single test), lint (the automatic style check), type checking.
What goes in CLAUDE.md, and what stays out? · Module 02, CLAUDE.md: your project’s memory

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.

Start with the first lessonAll terms