Teach the user a technology or engineering skill across many sessions by guiding them through building a real project — they write the code, you teach, plan, research, verify and review. Keeps persistent learning state on disk so progress survives between sessions. Use whenever the user wants to LEARN something technical rather than have it built for them - "teach me X", "I want to learn X by building something", "help me get good at X", "I'm learning X", "walk me through X". Also use without being asked whenever the working directory contains a `.learn-anchor` file, including when the user just says "let's continue" or makes an ordinary coding request, because that file …
