Meet the format: the last lecture of a level will often look like this one — extra materials. We explain this once, here, and after that we simply publish them.
Reading them is optional. We can’t make you anyway: no robot will knock on your door asking “so why did you scroll past it?”.
The topics vary — from how the platform itself works to the things without which half the words go right past you while you build products with Claude Code. Anyone can nod with a knowing look, but it stops working at the second question.
There will be no deep dives: no “go study these hundred hours of theory”. Just the minimum you need to understand why the thing exists, how the agent works with it, and why it suddenly asks “what would be the better way to do this?” instead of silently doing the wrong thing.
JavaRush plugin in IntelliJ IDEA for the Claude Code course
You can solve the course tasks right inside IDEA, without switching to the browser. One subtlety worth knowing in advance: Claude Code sees the task files, but not the Condition panel with the task description — so you retell the description to the agent yourself.
Claude Code in your IDE: what the plugin gives you and where you can trip up
Claude Code works in a bare terminal too. Here is what the IntelliJ IDEA connection adds: a diff in the editor window, selection context, linter errors, line references from a keyboard shortcut. Plus three common traps, including the Esc key that does not interrupt anything.
Terminal and working directory: where to start Claude Code
What a terminal can do, how to read paths and move between folders on Windows, macOS, and Linux. Using javarush-project as an example, we will see why Claude Code should be started in the folder of the specific task.
A brief for the agent: how to turn an idea into a task
Two words such as "build 2048" leave dozens of decisions for the agent to make on your behalf. The article shows how to write a short brief around four pillars: the goal, behavior you can verify, first-version boundaries, and a manual check - plus when a sandbox is more useful than more questions.