Design a personalized learning assistant that adapts to each student.

The LLM is the easy part. The system is a learner model: a skill graph, a per-student mastery estimate, and an item selector that keeps the student at the edge of their ability. Here is the design, including the pedagogical constraint most candidates miss.

Updated Sep 2026 · Grounded in real GenAI, LLM, and AI/ML engineering interview loops and written to a senior-engineer editorial bar.