vibe-learn is a free, open-source Claude Code skill that teaches you while it builds. After meaningful code or a real bug fix, Claude adds a short Learn block (2–4 takeaways, jargon explained from scratch), a bug-class breakdown, or a mental model, plus optional non-blocking quizzes. Progress carries across sessions with spaced review, streaks, challenges, teach-back, and Anki flashcard export. Your code doesn't change — you just understand it.