Highlight-to-explain
Select any phrase in a lesson, a drill, or the review after a submitted sitting, and one sentence comes back explaining what it means.
What it will and will not doLink to the section: What it will and will not do
It explains. It does not solve. If the thing you highlighted is itself a question, it tells you what the question is asking rather than what the answer is.
It is deliberately fast rather than clever — a gloss that arrives while you are still looking at the phrase is worth far more than a better one that arrives after you have moved on.
The capLink to the section: The cap
Twenty a day and sixty a week, per account. The budget is consumed before the request is sent, and if the counter cannot be reached the call is refused rather than let through.
That cap is what stops this becoming a paying-users-only feature later. A runtime AI feature with no ceiling has two futures — restricted or removed — and both are worse than a number stated up front.
Nothing is storedLink to the section: Nothing is stored
The selection is sent, an answer comes back, both are dropped. There is no table recording what you highlighted and nothing echoed back in an error. The counter counts calls, not content.
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