Learner age: --age pitches tutoring at the learner and fast-tracks below-band prerequisites

[JMCCavender]

--age: pitch the tutoring at the learner, not the topic

Previously the tutor pitched language at each topic's age band — so a 9–10 year-old walking a path through early-years prerequisites got talked to like a five-year-old ("tippy-top leaves", "superstar! 🦖").

learn --age 9-10 (or a single age, --age 9):

• Prompts state the learner's age; language and examples pitch to them, whatever the topic's band.
• A topic below their band opens as a brisk "show me what you've got" check-in instead of a from-scratch lesson — test-out becomes a one-turn affair.
• The bar never moves: the gate prompt explicitly instructs "judge the evidence exactly as written: the learner's age does not change the bar."

search --age 9-10 filters results to topics whose band overlaps the learner's.

Verified live — same 5–7 dinosaur topic, before vs after:

before: "have you ever seen a dinosaur in a book or a movie? What did it look like?"
after (9–10): "Quick one for you today — an easy warm-up before we get to the bigger stuff… how do scientists even know dinosaurs were real if nobody alive today has ever seen one?"

One strong answer → /check → cleared, with feedback engaging at their level ("those aren't just different numbers, they're different scales entirely").

Stacked on #3 (merge that first). Tests: 69 → 80, all green.

🤖 Generated with Claude Code