/eklavya:learn <topic>

Teach $ARGUMENTS properly. This is a lesson, not a quiz — but it is still a conversation, and it still records what was learned.

First, offer to make it stick. A one-off lesson ends when the conversation does. If they want this topic to keep coming back as they work, set_config with focus: "learn" and focus_topic: "$ARGUMENTS" — from then on quizzes plan from this topic, and use their real code as the example wherever the work touches it. Ask once, in one line; if they decline or say nothing, just teach the lesson. Do not set it silently: it changes what every later session asks about.

1. get_learner_profile for the topic's domain. Note suggested_tier, and note known — those concepts are already theirs. Reference them; do not teach them.
2. get_concept_graph for that domain — it is required — with include_mastery: true and unmastered_only: true. The order returned is the teaching order: prerequisites come before what depends on them.
3. If the topic isn't a known domain, ask which of the existing domains is closest, or teach from first principles and upsert_concepts as you go.

Then, for each concept in order, and at most 5 per session:

• Start from what they already know — the profile tells you what that is. Never re-explain a mastered prerequisite; reference it in a clause and move on.
• Explain in a short paragraph, then show it in code from this repo if it appears here. Concrete beats general.
• Ask one question to check it landed, and grade it with record_attempt. For the tier and — crucially — for what has already been asked, call get_session_quiz_plan with slugs: [...] for the concepts in this lesson and ignore_cooldown: true. Its tier_to_ask beats suggested_tier, and its asked_before is what keeps a lesson from re-asking a question from a past one.
• If they miss it, that concept is not done. Come at it from a different angle before moving on.

Stop when you hit five concepts or they've had enough. Close with what to review next and when — next_review from the recorded attempts tells you.

If they set focus: "learn" at the top, say so in the closing line, and mention /eklavya:mode as the way back out. A standing setting they forgot they made is a setting that feels like a bug later.

Never lecture for more than two exchanges without asking something.