The project, called arduino-cli, is the first time that the official toolchain has departed from the Java-based editor known as the Arduino IDE ... can do things like install and manage libraries.

In comparison, you won't have to memorize commands to install any library or run your Arduino sketch. Since everything's done ...

The other thing the IDE’s preprocessor does is to ... internals of the Arduino core library, search for “Arduino.h” on your local install, or hit up the core library on Github.