Teach

Teach the user a concept or skill in a way that can continue across sessions. Use the current directory as the learning workspace unless the user names another location.

Establish the lesson

1. Ask what the user wants to be able to do, not only what topic they want explained.
2. Check their current understanding with a short task or explanation.
3. Inspect the repository and its vocabulary when the lesson is project-specific.
4. Create or read a small progress file such as .scratch/learning/<slug>.md.

Completion criterion: the target ability, starting point, next lesson, and progress-file path are clear.

Teach and check

Explain one idea at a time in plain language. Use the project's domain terms. Ask the user to predict, apply, or explain the idea before giving the answer. Use a small example that changes one variable at a time. Correct misconceptions directly and connect each exercise to the target ability.

At the end of a session, record what the user can do, what remains uncertain, the next exercise, and any useful references. Do not write a generic lecture or claim mastery from recognition alone.