📓 Study from failure
Mistake Notebook
Mistakes are data. This notebook turns them into a study plan.
Every failed command or wrong answer in a mission is logged here automatically — what you tried, why it was wrong, and where to learn the right way. Nothing leaves your browser.
Review exercises
Fresh exercises built from your actual mistakes — similar shape, new data, so you practice the skill instead of memorizing the answer.
Your mistakes
No mistakes yet — that's suspicious.
Either you're perfect (unlikely) or you haven't tried anything hard yet.
Go break something in a mission. That's what they're for.
Genie guide
Every failed command and wrong answer is logged here with the correct reasoning. Work the review exercises to turn mistakes into mastery.
Mistakes are data. This notebook turns them into a study plan.
Reading 1 of 9 sections
Error decoder
Paste the red text. The decoder names the kind of error it is and points at the lesson that fixes it. It never runs your code, and decoding happens entirely in your browser — your pasted error is never sent anywhere.